// SPDX-License-Identifier: MIT
#include "window.h"
#include <QMenu>
#include <QPainter>
#include <QMouseEvent>
#include <QTest>
#include <QTemporaryDir>
#include <QTabWidget>
#include <QPushButton>
#include <QSignalSpy>
#include <QToolButton>
#include "legend.h"
#include "tray.h"
#include <cmath>
#include <QTextDocument>
#include <QTextBlock>
#include <QTextFragment>
#include "traypage.h"
#include "colorbutton.h"
#include <QMessageBox>
#include <QSlider>
#include "graphdata.h"
#include "tooltip.h"
#include "readingformat.h"
#include "processusage.h"
#include <QFile>
#include <QDir>
#include <QGroupBox>
#include <QScrollArea>
#include <QScrollBar>
#include "widgets.h"
#include <QColorDialog>

class WindowTest : public QObject {
    Q_OBJECT
private Q_SLOTS:
    void readingFormat_data() {
        QTest::addColumn<double>("value"); QTest::addColumn<QString>("text");
        QTest::newRow("zero") << 0. << QString("0.0");
        QTest::newRow("small") << 1.26 << QString("1.3");
        QTest::newRow("negative") << -1.26 << QString("-1.3");
        QTest::newRow("negative zero") << -0.01 << QString("0.0");
        QTest::newRow("whole below ten") << 9. << QString("9.0");
        QTest::newRow("round to boundary") << 9.96 << QString("10.0");
        QTest::newRow("ten") << 10. << QString("10");
        QTest::newRow("minus ten") << -10. << QString("-10");
        QTest::newRow("round up") << 12.6 << QString("13");
        QTest::newRow("round down") << 12.4 << QString("12");
        QTest::newRow("negative round") << -12.5 << QString("-13");
        QTest::newRow("unavailable") << double(NAN) << QString("—");
        QTest::newRow("infinite") << double(INFINITY) << QString("—");
    }
    void readingFormat() {
        QFETCH(double, value); QFETCH(QString, text);
        QCOMPARE(formatReading(value), text);
    }
    void trayNumberPrecision() {
        TrayStyle style; style.border = false;
        style.backgroundColor = Qt::black; style.lineColor = Qt::white;
        const auto render = [&](double value, const QString &unit) {
            return telemetryIcon(false, {{0, value}}, unit, style, 0).pixmap(64, 64).toImage();
        };
        QCOMPARE(render(1250, "MHz"), render(1.25, "W")); // GHz in the icon.
        QCOMPARE(render(1.25, "W"), render(1.25, "°C"));
        QVERIFY(render(1.2, "W") != render(1.4, "W"));
        QCOMPARE(render(12.6, "W"), render(13, "%"));
        QCOMPARE(render(10000, "MHz"), render(10, "%"));
        QVERIFY(render(-1.2, "W") != render(1.2, "W"));
    }
    void stackedTrayNumbers() {
        TrayStyle style; style.border = false;
        style.backgroundColor = Qt::black; style.lineColor = Qt::white;
        const auto render = [&](double first, double second, const QString &unit = "W") {
            return telemetryIcon(false, {{0, first}}, "W", style, 0, TrayReading{second, unit}).pixmap(64, 64).toImage();
        };
        const auto both = render(1.2, 3.4);
        const auto changedTop = render(5.6, 3.4), changedBottom = render(1.2, 7.8);
        QVERIFY(both.copy(0, 0, 64, 32) != changedTop.copy(0, 0, 64, 32));
        QCOMPARE(both.copy(0, 32, 64, 32), changedTop.copy(0, 32, 64, 32));
        QCOMPARE(both.copy(0, 0, 64, 32), changedBottom.copy(0, 0, 64, 32));
        QVERIFY(both.copy(0, 32, 64, 32) != changedBottom.copy(0, 32, 64, 32));
        QCOMPARE(both, render(1.2, 3400, "MHz"));
        QVERIFY(both != render(1.2, NAN)); // Missing is a dash, not removal of the second row.
        // Both rows use their available height with small margins.
        for (int row = 0; row < 2; ++row) {
            int first = 64, last = -1;
            for (int y = row * 32; y < (row + 1) * 32; ++y)
                for (int x = 0; x < 64; ++x)
                    if (qRed(both.pixel(x, y)) > 128) { first = std::min(first, y); last = std::max(last, y); }
            QVERIFY(first <= row * 32 + 5); QVERIFY(last >= row * 32 + 26);
        }
        const auto single = telemetryIcon(false, {{0, 1.2}}, "W", style, 0).pixmap(64, 64).toImage();
        QCOMPARE(single, telemetryIcon(false, {{0, 1.2}}, "W", style, 0, std::nullopt).pixmap(64, 64).toImage());
        const QVector<QPointF> history{{0, 1.2}, {1000, 3.4}};
        QCOMPARE(telemetryIcon(true, history, "W", style, 1000).pixmap(64, 64).toImage(),
            telemetryIcon(true, history, "W", style, 1000, TrayReading{90, "%"}).pixmap(64, 64).toImage());
    }
    void secondTrayReading() {
        const QVector<Sensor> sensors{{"cpu-usage", "CPU usage", {}, "%"}, {"cpu/p/max", "P-cores maximum", {}, "MHz"}};
        TrayPage page(QVariantMap{{"tray/mode", "number"}}, sensors);
        auto *second = page.findChild<QComboBox *>("traySecondMetric");
        auto *mode = page.findChild<QComboBox *>("trayDisplayMode");
        QVERIFY(second); QCOMPARE(second->currentText(), QString("None")); QVERIFY(!page.secondMetric());
        QVERIFY(!second->isHidden());
        const auto original = page.draft();
        second->setCurrentIndex(second->findData("cpu/p/max"));
        QVERIFY(page.secondMetric()); QCOMPARE(page.secondMetric()->id, QString("cpu/p/max"));
        const auto chosen = page.draft();
        TrayPage restored(chosen, sensors);
        QCOMPARE(restored.secondMetric()->id, QString("cpu/p/max"));
        mode->setCurrentIndex(mode->findData("graph")); QVERIFY(second->isHidden());
        mode->setCurrentIndex(mode->findData("number")); QVERIFY(!second->isHidden());
        QCOMPARE(page.secondMetric()->id, QString("cpu/p/max"));
        page.load(original); QVERIFY(!page.secondMetric());
        page.load(chosen); QCOMPARE(page.secondMetric()->id, QString("cpu/p/max"));
        TrayPage missing(chosen, {sensors[0]}); QVERIFY(!missing.secondMetric());
    }
    void powerHoverOptions() {
        const QVector<Sensor> sensors{{"power/rapl/0", "CPU package", {}, "W"},
            {"power/rapl/0:0", "CPU cores", {}, "W"}, {"battery-rate", "Battery rate", {}, "W"}};
        QVariantMap settings{{"tray/hover/cpu", false}, {"tray/hover/fan", false}, {"tray/hover/battery", false}};
        const QVector<Sensor> power{sensors[0], sensors[1]};
        const QMap<QString, double> values{{power[0].id, 4.25}, {power[1].id, 12.6}};
        TrayPage page(settings, sensors);
        auto *package = page.findChild<QCheckBox *>("hover/" + power[0].id);
        auto *cores = page.findChild<QCheckBox *>("hover/" + power[1].id);
        QVERIFY(package); QVERIFY(cores);
        QVERIFY(!package->isChecked()); QVERIFY(!cores->isChecked());
        QVERIFY(!page.findChild<QCheckBox *>("hover/battery-rate"));
        QVERIFY(trayTooltip(page.draft(), values, {}, {}, {}, power).isEmpty());
        const auto saved = page.draft();
        package->setChecked(true);
        QCOMPARE(trayTooltip(page.draft(), values, {}, {}, {}, power), QString("CPU package: 4.3 W"));
        cores->setChecked(true);
        QCOMPARE(trayTooltip(page.draft(), values, {}, {}, {}, power), QString("Power consumption:\n\u2003CPU package: 4.3 W\n\u2003CPU cores: 13 W"));
        QCOMPARE(trayTooltip(page.draft(), {}, {}, {}, {}, power), QString("Power consumption:\n\u2003CPU package: — W\n\u2003CPU cores: — W"));
        const auto chosen = page.draft();
        page.load(saved); QVERIFY(!package->isChecked()); QVERIFY(!cores->isChecked());
        page.load(chosen); QVERIFY(package->isChecked()); QVERIFY(cores->isChecked());
        TrayPage restored(chosen, sensors);
        QCOMPARE(trayTooltip(restored.draft(), values, {}, {}, {}, power), trayTooltip(chosen, values, {}, {}, {}, power));
    }
    void hoverFormatting() {
        const QVector<Sensor> sensors{{"cros_ec/peci-temp", "CPU", {}, "°C"}, {"spd5118/temp1", "Memory", {}, "°C"},
            {"nvme/Composite", "NVMe", {}, "°C"}};
        const auto temperatures = tooltipSensors(sensors);
        QCOMPARE(temperatures[0].id, sensors[0].id); QVERIFY(temperatures[3].id.isEmpty());
        const QMap<QString, double> readings{{"cpu-usage", 12.3}, {"fan", 2500}, {"fan-duty", 40}, {sensors[0].id, 47.}, {sensors[1].id, 38.}, {sensors[2].id, 41.}};
        QVariantMap settings{{"tray/hover/topApp", true}};
        auto text = trayTooltip(settings, readings, temperatures, "Battery 80%", {"Firefox: 5.4 %"});
        QCOMPARE(text, QString("CPU usage: 12.3 %\n\u2003Firefox: 5.4 %\nBattery 80%\nFan speed: 2500 RPM (40 %)\nTemperatures:\n\u2003CPU 47°C\n\u2003RAM 38°C\n\u2003NVMe 41°C"));
        const QStringList apps{"Firefox: 5.4 %", "Dolphin: 2.0 %", "Konsole: 1.0 %"};
        for (int count = 0; count <= 3; ++count) {
            settings["tray/hover/topApps"] = count;
            const auto popup = trayTooltip(settings, readings, temperatures, {}, apps);
            for (int i = 0; i < 3; ++i) QCOMPARE(popup.contains(apps[i]), i < count);
        }
        settings["tray/hover/cpu"] = false; settings["tray/hover/battery"] = false; settings["tray/hover/fan"] = false;
        settings["tray/hover/temperature/memory"] = false; settings["tray/hover/temperature/nvme"] = false;
        QCOMPARE(trayTooltip(settings, readings, temperatures, {}, apps), QString("CPU 47°C"));
        QCOMPARE(trayTooltip(settings, {}, temperatures, {}, {}), QString("CPU —°C"));
        QCOMPARE(trayTooltip(settings, {{sensors[0].id, 3.2}}, temperatures, {}, {}), QString("CPU 3.2°C"));
        settings["tray/hover/temperature/cpu"] = false;
        QVERIFY(trayTooltip(settings, readings, temperatures, {}, {}).isEmpty());
        QVariantMap battery{{"state", "Discharging"}, {"capacity", 75}, {"watts", 12.5}, {"remainingMWh", 56250}, {"fullMWh", 75000}};
        QCOMPARE(batteryTooltip(battery, 80, {{"TimeToEmpty", 5400}}), QString("Battery 75% · 56 250 mWh / 75 000 mWh\n\u2003-13 W · 1 h 30 min to 0%"));
        battery["state"] = "Charging";
        QCOMPARE(batteryTooltip(battery, 100, {{"TimeToFull", 3600}}), QString("Battery 75% · 56 250 mWh / 75 000 mWh\n\u2003+13 W · 1 h 0 min to 100%"));
        battery["charge_full"] = 10000; battery["charge_now"] = 7500; battery["current_now"] = 1000;
        QCOMPARE(batteryTooltip(battery, 80, {}), QString("Battery 75% · 56 250 mWh / 75 000 mWh\n\u2003+13 W · ≈0 h 30 min to 80%"));
        battery["current_now"] = 0;
        QVERIFY(batteryTooltip(battery, 80, {}).contains("Time remaining unavailable"));
        battery["capacity"] = 80;
        QVERIFY(batteryTooltip(battery, 80, {}).contains("80% limit reached"));
        QVERIFY(batteryTooltip({}, 100, {}).contains("unavailable"));
    }
    void processCpuAccounting() {
        QTemporaryDir proc;
        const auto writeStat = [&](int pid, const QString &command, int ticks, int start) {
            QVERIFY(QDir().mkpath(proc.filePath(QString::number(pid))));
            QStringList fields; for (int i = 0; i < 20; ++i) fields << "0";
            fields[0] = "R"; fields[11] = QString::number(ticks); fields[19] = QString::number(start);
            QFile file(proc.filePath(QString::number(pid) + "/stat")); QVERIFY(file.open(QIODevice::WriteOnly));
            file.write((QString::number(pid) + " (" + command + ") " + fields.join(' ')).toUtf8());
        };
        ProcessUsage usage;
        writeStat(1, "Test) App", 100, 1); writeStat(2, "Test) App", 50, 2); writeStat(3, "Other", 100, 3);
        QVERIFY(usage.sample({}, proc.path()).isEmpty());
        writeStat(1, "Test) App", 110, 1); writeStat(2, "Test) App", 70, 2); writeStat(3, "Other", 125, 3);
        auto top = usage.sample(100, proc.path()); QCOMPARE(top.size(), 2);
        QCOMPARE(top[0].name, QString("Test) App")); QCOMPARE(top[0].percent, 30.); // Sum matching app processes, not just the busiest PID.
        QCOMPARE(top[1].name, QString("Other")); QCOMPARE(top[1].percent, 25.);
        writeStat(1, "Replacement", 5000, 9); // Reused PID must not look like a CPU spike.
        writeStat(3, "Other", 130, 3);
        top = usage.sample(100, proc.path()); QVERIFY(!top.isEmpty());
        QCOMPARE(top[0].name, QString("Other")); QCOMPARE(top[0].percent, 5.);
        QVERIFY(QFile::remove(proc.filePath("2/stat"))); // Exit/unreadable stat is an expected race.
        top = usage.sample(100, proc.path()); QVERIFY(!top.isEmpty()); QCOMPARE(top[0].percent, 0.);
        // More than three apps: limit the list and rank by usage, with stable name ordering on ties.
        writeStat(4, "Fourth", 10, 4); writeStat(5, "Fifth", 10, 5);
        usage.sample(100, proc.path());
        writeStat(1, "Replacement", 5020, 9); writeStat(3, "Other", 170, 3);
        writeStat(4, "Fourth", 20, 4); writeStat(5, "Fifth", 30, 5);
        top = usage.sample(100, proc.path()); QCOMPARE(top.size(), 3);
        QCOMPARE(top[0].name, QString("Other")); QCOMPARE(top[1].name, QString("Fifth")); QCOMPARE(top[2].name, QString("Replacement"));
        usage.reset(); QVERIFY(usage.sample(100, proc.path()).isEmpty());
    }
    void trayOptionHierarchy() {
        QTemporaryDir root; QSettings settings(root.filePath("tray.ini"), QSettings::IniFormat);
        TrayPage page(settings, {{"cpu-usage", "CPU", {}, "%"}, {"cros_ec/peci-temp", "CPU temperature", {}, "°C"}});
        page.show();
        auto *mode = page.findChild<QComboBox *>("trayDisplayMode");
        auto *graph = page.findChild<QWidget *>("trayGraphOptions");
        auto *overflow = page.findChild<QWidget *>("trayOverflowOptions");
        auto *outside = page.findChild<QComboBox *>("trayOutside");
        QVERIFY(graph->isHidden());
        mode->setCurrentIndex(mode->findData("graph")); QVERIFY(graph->isVisible()); QVERIFY(overflow->isVisible());
        auto *border = page.findChild<QCheckBox *>("border");
        auto *borderColour = page.findChild<ColorButton *>("borderColor");
        auto *colours = qobject_cast<QFormLayout *>(borderColour->parentWidget()->layout());
        auto *borderLabel = colours->labelForField(borderColour);
        const auto bordered = page.draft();
        border->setChecked(false);
        QVERIFY(borderColour->isHidden()); QVERIFY(borderLabel->isHidden());
        QCOMPARE(page.draft().value("tray/borderColor"), bordered.value("tray/borderColor"));
        page.load(bordered); QVERIFY(borderColour->isVisible()); QVERIFY(borderLabel->isVisible());
        outside->setCurrentIndex(outside->findData("hide")); QVERIFY(overflow->isHidden());
        outside->setCurrentIndex(outside->findData("clamp")); QVERIFY(overflow->isVisible());
        auto *cpu = page.findChild<QCheckBox *>("hover/cpu");
        auto *hoverTitle = page.findChild<QLabel *>("trayHoverTitle");
        auto *hoverSettings = page.findChild<QWidget *>("trayHoverSettings");
        QVERIFY(hoverTitle); QVERIFY(hoverSettings);
        QVERIFY(!qobject_cast<QGroupBox *>(hoverSettings));
        QCOMPARE(hoverSettings->layout()->contentsMargins().left(), 24);
        QVERIFY(cpu->mapTo(&page, QPoint()).x() > hoverTitle->mapTo(&page, QPoint()).x());
        auto *app = page.findChild<QSpinBox *>("hover/topApps");
        QCOMPARE(app->minimum(), 0); QCOMPARE(app->maximum(), 3);
        const auto saved = page.draft();
        app->setValue(3); cpu->setChecked(false); QVERIFY(!app->isEnabled());
        QCOMPARE(app->value(), 3); // Retain the choice when its parent is disabled.
        QVERIFY(!page.findChild<QCheckBox *>("hover/temperature/memory")->isEnabled());
        page.load(saved); QVERIFY(cpu->isChecked()); QVERIFY(app->isEnabled()); QCOMPARE(app->value(), 0);
        mode->setCurrentIndex(mode->findData("number")); QVERIFY(graph->isHidden());
        QVERIFY(cpu->isVisible()); QVERIFY(settings.allKeys().isEmpty()); // Staged until Save and Apply.
        settings.setValue("tray/hover/topApp", true);
        TrayPage migrated(settings, {{"cpu-usage", "CPU", {}, "%"}});
        QCOMPARE(migrated.findChild<QSpinBox *>("hover/topApps")->value(), 1);
        QVERIFY(!migrated.draft().contains("tray/hover/topApp"));
        QCOMPARE(tooltipAppCount({{"tray/hover/topApps", 3}, {"tray/hover/topApp", false}}), 3);
    }
    void backgroundOpacity() {
        const QVector<Sensor> sensors{{"cpu-usage", "CPU", {}, "%"}};
        TrayPage page(QVariantMap{{"tray/transparent", true}, {"tray/backgroundColor", "#ff123456"}, {"tray/mode", "number"}}, sensors);
        QVERIFY(!page.findChild<QCheckBox *>("transparent"));
        QVERIFY(!page.draft().contains("tray/transparent"));
        QCOMPARE(page.iconStyle().backgroundColor, QColor(0x12, 0x34, 0x56, 0));
        const auto transparent = page.draft(); page.show();
        bool alphaAvailable = false;
        QTimer::singleShot(0, &page, [&] {
            auto *dialog = qobject_cast<QColorDialog *>(QApplication::activeModalWidget());
            if (!dialog) return;
            alphaAvailable = dialog->testOption(QColorDialog::ShowAlphaChannel);
            dialog->setCurrentColor(QColor(20, 40, 60, 128)); dialog->accept();
        });
        page.findChild<ColorButton *>("backgroundColor")->click(); QVERIFY(alphaAvailable);
        QCOMPARE(page.iconStyle().backgroundColor, QColor(20, 40, 60, 128));
        const auto half = page.draft();
        page.load(transparent); QCOMPARE(page.iconStyle().backgroundColor.alpha(), 0);
        page.load(half); QCOMPARE(page.iconStyle().backgroundColor.alpha(), 128);
        auto style = page.iconStyle(); style.border = false; style.fill = false;
        const auto image = telemetryIcon(true, {}, "%", style).pixmap(64, 64).toImage();
        QCOMPARE(image.pixelColor(1, 1).alpha(), 128);
        TrayPage oldOpaque(QVariantMap{{"tray/transparent", false}, {"tray/backgroundColor", "#ff123456"}}, sensors);
        QCOMPARE(oldOpaque.iconStyle().backgroundColor.alpha(), 255);
    }
    void liveProcessSampling() {
        CpuUsage cpu; ProcessUsage processes;
        cpu.sample(readText("/proc/stat"));
        QVERIFY(processes.sample(cpu.totalDelta()).isEmpty());
        QTest::qWait(200);
        QVERIFY(cpu.sample(readText("/proc/stat")));
        const auto apps = processes.sample(cpu.totalDelta());
        QVERIFY(!apps.isEmpty()); QVERIFY(apps.size() <= 3);
        double previous = 100;
        for (const auto &app : apps) {
            QVERIFY(!app.name.isEmpty()); QVERIFY(std::isfinite(app.percent) && app.percent >= 0 && app.percent <= previous);
            previous = app.percent;
        }
    }
    void multipleTrayDraftsAndLayout() {
        QTemporaryDir root; QSettings settings(root.filePath("tray.ini"), QSettings::IniFormat);
        settings.setValue("tray/mode", "number"); settings.setValue("tray/hover/topApp", true);
        const QVector<Sensor> sensors{{"cpu-usage", "CPU usage", {}, "%"}};
        TrayIconsPage page(settings, sensors); page.show();
        auto *count = page.findChild<QSlider *>("trayIconCount");
        QCOMPARE(count->minimum(), 1); QCOMPARE(count->maximum(), 10);
        QCOMPARE(page.configurations().first().mode, QString("number"));
        QCOMPARE(tooltipAppCount(page.configurations().first().values), 1);
        const auto original = page.draft();
        QVERIFY(!original.contains("tray/mode"));
        QCOMPARE(original.value("tray/icons/1/mode").toString(), QString("number"));
        count->setValue(3);
        auto editors = page.findChildren<TrayPage *>(); QCOMPARE(editors.size(), 3);
        QCOMPARE(page.configurations()[1].mode, QString("icon"));
        auto *secondMode = editors[1]->findChild<QComboBox *>("trayDisplayMode");
        secondMode->setCurrentIndex(secondMode->findData("graph"));
        editors[1]->findChild<QComboBox *>("trayHistory")->setCurrentIndex(0);
        count->setValue(1);
        QCOMPARE(page.draft(), original); // Hidden cards do not get serialised.
        count->setValue(3);
        QCOMPARE(page.configurations()[1].mode, QString("graph"));
        QCOMPARE(page.configurations()[1].style.historyMs, qint64(10000));
        const auto three = page.draft();
        page.load(original); count->setValue(3);
        QCOMPARE(page.configurations()[1].mode, QString("icon")); // Undo discards unsaved additions.
        page.load(three);
        count->setValue(1); page.discardHidden(); count->setValue(3);
        QCOMPARE(page.configurations()[1].mode, QString("icon")); // Successful save forgets removed cards.
        page.load(three);
        const auto cards = page.findChildren<QGroupBox *>(QString(), Qt::FindDirectChildrenOnly);
        QCOMPARE(cards.size(), 3);
        const int width = cards[0]->minimumWidth();
        page.resize(width * 3 + 100, 1600);
        QTRY_COMPARE(cards[0]->y(), cards[1]->y());
        QCOMPARE(cards[1]->y(), cards[2]->y()); QVERIFY(cards[1]->x() > cards[0]->x());
        page.resize(width + 40, 3000);
        QTRY_VERIFY(cards[1]->y() > cards[0]->y()); QCOMPARE(cards[1]->x(), cards[0]->x());
        count->setValue(10); QCOMPARE(page.configurations().size(), 10);
        QCOMPARE(page.draft().value("tray/icons/10/mode").toString(), QString("icon"));
        for (const auto &key : settings.allKeys()) settings.remove(key);
        const auto saved = page.draft();
        for (auto it = saved.cbegin(); it != saved.cend(); ++it) settings.setValue(it.key(), it.value());
        TrayIconsPage restored(settings, sensors);
        QCOMPARE(restored.draft(), saved); QCOMPARE(restored.configurations().size(), 10);
        const QString shot = qEnvironmentVariable("FRAMEWORK_TRAY_MULTI_SCREENSHOT");
        if (!shot.isEmpty()) {
            page.load(three); page.resize(width * 2 + 70, 1500); QTest::qWait(50);
            QVERIFY(page.grab().save(shot));
        }
    }
    void multipleLiveTrayIcons() {
        QTemporaryDir root; qputenv("XDG_CONFIG_HOME", root.path().toUtf8());
        QSettings::setPath(QSettings::NativeFormat, QSettings::UserScope, root.path());
        QSettings settings("fedora-tools", "framework-laptop-tools");
        settings.setValue("tray/mode", "number");
        Window window; window.show();
        auto *page = window.findChild<TrayIconsPage *>();
        auto *count = window.findChild<QSlider *>("trayIconCount");
        auto *save = window.findChild<QPushButton *>("saveAll");
        auto *undo = window.findChild<QPushButton *>("undoAll");
        auto icons = window.findChildren<QSystemTrayIcon *>(); QCOMPARE(icons.size(), 1);
        auto *first = icons[0];
        count->setValue(2); QCOMPARE(window.findChildren<QSystemTrayIcon *>().size(), 1);
        auto *tabs = window.findChild<QTabWidget *>(); tabs->setCurrentIndex(5);
        const auto cards = page->findChildren<QGroupBox *>(QString(), Qt::FindDirectChildrenOnly);
        const int cardWidth = cards[0]->minimumWidth();
        window.resize(cardWidth * 2 + 150, 830);
        QTRY_COMPARE(cards[0]->y(), cards[1]->y());
        window.resize(cardWidth + 150, 830);
        QTRY_VERIFY(cards[1]->y() > cards[0]->y());
        auto *scroll = qobject_cast<QScrollArea *>(tabs->widget(5));
        QTRY_COMPARE(scroll->horizontalScrollBar()->maximum(), 0);
        QVERIFY(scroll->verticalScrollBar()->maximum() > 0);
        auto *second = page->findChildren<TrayPage *>()[1];
        second->findChild<QCheckBox *>("hover/cpu")->setChecked(false);
        QTRY_VERIFY(save->isEnabled()); save->click();
        icons = window.findChildren<QSystemTrayIcon *>(); QCOMPARE(icons.size(), 2); QCOMPARE(icons[0], first);
        QVERIFY(icons[0]->toolTip().startsWith("CPU usage:"));
        QVERIFY(!icons[1]->toolTip().startsWith("CPU usage:"));
        QVERIFY(icons[0]->contextMenu() != icons[1]->contextMenu());
        QCOMPARE(icons[0]->contextMenu()->actions().size(), icons[1]->contextMenu()->actions().size());
        QCOMPARE(settings.value("tray/count").toInt(), 2);
        QVERIFY(!settings.contains("tray/mode"));
        const auto ordered = page->draft();
        cards[0]->findChild<QToolButton *>("moveIconRight")->click();
        QVERIFY(icons[0]->toolTip().startsWith("CPU usage:")); // Move is still only a draft.
        QTRY_VERIFY(save->isEnabled()); save->click();
        QVERIFY(!icons[0]->toolTip().startsWith("CPU usage:"));
        QVERIFY(icons[1]->toolTip().startsWith("CPU usage:"));
        QVERIFY(!settings.value("tray/icons/1/hover/cpu").toBool());
        cards[0]->findChild<QToolButton *>("moveIconRight")->click();
        QTRY_VERIFY(undo->isEnabled()); undo->click();
        QVERIFY(!page->configurations()[0].values.value("tray/hover/cpu").toBool());
        cards[0]->findChild<QToolButton *>("moveIconRight")->click();
        QCOMPARE(page->draft(), ordered);
        QTRY_VERIFY(save->isEnabled()); save->click();
        count->setValue(1); QTRY_VERIFY(undo->isEnabled()); undo->click(); QCOMPARE(count->value(), 2);
        QVERIFY(!page->findChildren<TrayPage *>()[1]->findChild<QCheckBox *>("hover/cpu")->isChecked());
        count->setValue(1); QTRY_VERIFY(save->isEnabled()); save->click();
        QCOMPARE(window.findChildren<QSystemTrayIcon *>().size(), 1);
        for (const auto &key : settings.allKeys()) QVERIFY(!key.startsWith("tray/icons/2/"));
        count->setValue(2);
        QVERIFY(page->findChildren<TrayPage *>()[1]->findChild<QCheckBox *>("hover/cpu")->isChecked());
        QCOMPARE(page->configurations()[1].mode, QString("icon"));
    }
    void moveTrayConfigurations() {
        QTemporaryDir root; QSettings settings(root.filePath("tray.ini"), QSettings::IniFormat);
        TrayIconsPage page(settings, {{"cpu-usage", "CPU", {}, "%"}});
        auto *count = page.findChild<QSlider *>("trayIconCount"); count->setValue(3);
        const auto cards = page.findChildren<QGroupBox *>(QString(), Qt::FindDirectChildrenOnly);
        auto *first = cards[0]->findChild<TrayPage *>();
        auto *last = cards[2]->findChild<TrayPage *>();
        first->findChild<QComboBox *>("trayDisplayMode")->setCurrentIndex(1);
        first->findChild<QComboBox *>("trayHistory")->setCurrentIndex(0);
        first->findChild<QCheckBox *>("border")->setChecked(false);
        last->findChild<QComboBox *>("trayDisplayMode")->setCurrentIndex(2);
        last->findChild<QComboBox *>("traySecondMetric")->setCurrentIndex(1);
        last->findChild<QSpinBox *>("hover/topApps")->setValue(3);
        const auto firstValues = first->draft(), lastValues = last->draft();
        const auto original = page.draft();
        QVERIFY(!cards[0]->findChild<QToolButton *>("moveIconLeft")->isEnabled());
        QVERIFY(!cards[2]->findChild<QToolButton *>("moveIconRight")->isEnabled());
        QSignalSpy changed(&page, &TrayIconsPage::settingsChanged);
        cards[2]->findChild<QToolButton *>("moveIconLeft")->click();
        QCOMPARE(page.configurations()[1].values, lastValues); QCOMPARE(changed.count(), 1);
        QVERIFY(page.configurations()[1].secondMetric);
        QCOMPARE(page.configurations()[1].secondMetric->id, QString("cpu-usage"));
        cards[0]->findChild<QToolButton *>("moveIconRight")->click();
        QCOMPARE(page.configurations()[0].values, lastValues);
        QCOMPARE(page.configurations()[1].values, firstValues);
        // Crossing a grid row still exchanges adjacent logical positions.
        cards[1]->findChild<QToolButton *>("moveIconRight")->click();
        QCOMPARE(page.configurations()[2].values, firstValues);
        count->setValue(2);
        QVERIFY(!cards[1]->findChild<QToolButton *>("moveIconRight")->isEnabled());
        count->setValue(3); QCOMPARE(page.configurations()[2].values, firstValues);
        page.load(original); QCOMPARE(page.draft(), original);
        count->setValue(1);
        QVERIFY(!cards[0]->findChild<QToolButton *>("moveIconRight")->isEnabled());
        QVERIFY(!cards[0]->findChild<QToolButton *>("moveIconLeft")->isEnabled());
    }
    void timeWeightedColumns() {
        const auto connected = [](const QPointF &, const QPointF &) { return true; };
        const QVector<QPointF> points{{0, 0}, {2, 10}, {10, 10}};
        auto columns = timeAverages(points.begin(), points.end(), 0, 10, 2, connected);
        QCOMPARE(columns.size(), 2);
        QCOMPARE(columns[0].mean, 8.); QCOMPARE(columns[0].maximum, 10.);
        QCOMPARE(columns[0].lower(), columns[0].mean); QVERIFY(columns[0].compressed);
        QCOMPARE(columns[1].mean, 10.);
        columns = timeAverages(points.begin(), points.end(), 1, 3, 1, connected);
        QCOMPARE(columns[0].mean, 8.75); // Segment clipped and weighted at both pixel edges.
        columns = timeAverages(points.begin(), points.end(), 0, 10, 7, connected);
        double integral = 0;
        for (const auto &column : columns) integral += column.mean * (column.end - column.begin);
        QVERIFY(std::abs(integral - 90) < 1e-10); // Fractional boundaries preserve the total area.
        columns = timeAverages(points.begin(), points.end(), -10, 20, 1, connected);
        QCOMPARE(columns[0].mean, 9.); // Missing history contributes no artificial zeroes.
        QCOMPARE(columns[0].begin, 0.); QCOMPARE(columns[0].end, 10.);
        const QVector<QPointF> ramp{{0, -10}, {10, 10}};
        columns = timeAverages(ramp.begin(), ramp.end(), 0, 10, 100, connected);
        QCOMPARE(columns.size(), 100);
        for (const auto &column : columns) {
            QVERIFY(std::abs(column.mean - (column.begin + column.end - 10)) < 1e-10);
            QVERIFY(std::abs(column.maximum - (column.end * 2 - 10)) < 1e-10);
            QVERIFY(!column.compressed);
            QCOMPARE(column.lower(), column.minimum);
            QVERIFY(std::abs(column.minimum - (column.begin * 2 - 10)) < 1e-10);
        }
        const QVector<QPointF> gaps{{0, 0}, {2, 10}, {3, NAN}, {4, 10}, {6, 0}};
        columns = timeAverages(gaps.begin(), gaps.end(), 0, 6, 1, connected);
        QCOMPARE(columns.size(), 2);
        QCOMPARE(columns[0].mean, 5.); QCOMPARE(columns[1].mean, 5.);
        QCOMPARE(columns[0].end, 2.); QCOMPARE(columns[1].begin, 4.); // Gaps stay separate even in one pixel.
        columns = timeAverages(points.begin(), points.end(), 0, 10, 1,
            [](const QPointF &, const QPointF &b) { return b.x() < 10; });
        QCOMPARE(columns.size(), 1); QCOMPARE(columns[0].end, 2.); // Explicit suspend break.
    }
    void columnThicknessIsVerticalOnly() {
        QCOMPARE(columnBand(5, 6, 10, 10), QRectF(5, 9, 1, 2));
        QCOMPARE(columnBand(5, 6, 10, 11, 2, 2), QRectF(5, 9.5, 1, 2));
        QCOMPARE(columnBand(5, 6, 10, 50), QRectF(5, 10, 1, 40));
        for (double ratio : {1., 1.25, 1.5, 2.}) for (double bottom : {10., 11., 20.}) {
            QImage image(qRound(32 * ratio), qRound(32 * ratio), QImage::Format_ARGB32_Premultiplied);
            image.setDevicePixelRatio(ratio); image.fill(Qt::transparent);
            {
                QPainter painter(&image);
                painter.fillRect(columnBand(5 / ratio, 6 / ratio, 10, bottom, 2, ratio), Qt::green);
            }
            int pixels = 0;
            for (int y = 0; y < image.height(); ++y) for (int x = 0; x < image.width(); ++x) {
                if (!image.pixelColor(x, y).alpha()) continue;
                QCOMPARE(x, 5); ++pixels; // Thickness never leaks into either neighbour.
            }
            QVERIFY(pixels >= std::ceil(2 * ratio));
        }
    }
    void sparseSlopeStaysInItsColumns() {
        TrayStyle style; style.border = false; style.fill = false;
        style.backgroundColor = Qt::black; style.lineColor = Qt::green; style.historyMs = 6200;
        // Two samples span exactly two raster columns and most of the graph height.
        const auto image = telemetryIcon(true, {{1000, 10}, {1200, 90}}, "%", style, 6200).pixmap(64, 64).toImage();
        int pixels = 0;
        for (int y = 0; y < image.height(); ++y) for (int x = 0; x < image.width(); ++x) {
            if (image.pixelColor(x, y) != QColor(Qt::green)) continue;
            QVERIFY(x == 11 || x == 12); ++pixels;
        }
        QVERIFY(pixels > 40);
    }
    void peakHeightSurvivesPixelPhase() {
        QVector<QPointF> points;
        for (int i = 0; i <= 1000; ++i) points.append({double(i), i == 500 ? 100. : 10.});
        for (int phase = 0; phase <= 32; ++phase) {
            const double first = 200 + phase / 32. * 7.5;
            const auto columns = timeAverages(points.cbegin(), points.cend(), first, first + 600, 80,
                [](const QPointF &, const QPointF &) { return true; });
            QImage image(80, 120, QImage::Format_ARGB32_Premultiplied); image.fill(Qt::transparent);
            {
                QPainter painter(&image);
                for (const auto &column : columns)
                    painter.fillRect(columnBand(column.index, column.index + 1, 110 - column.maximum,
                                                110 - column.lower()), Qt::green);
            }
            int top = image.height();
            for (int y = 0; y < image.height(); ++y) for (int x = 0; x < image.width(); ++x)
                if (image.pixelColor(x, y).alpha()) top = std::min(top, y);
            QCOMPARE(top, 10); // The peak's rasterised height, not merely its numeric maximum.
        }
    }
    void dayHistoryAndStretch() {
        Chart chart("MHz"); chart.addSeries("hidden");
        const qint64 start = 100000000;
        for (int i = 0; i <= 7200; ++i) chart.sample({{"hidden", double(i)}}, 500, start + i * 500);
        QCOMPARE(chart.history("hidden").size(), 7201); // Not capped at 600, even when hidden.
        chart.setSelected("hidden", true);
        QVERIFY(chart.readingAt(start + 500).contains("hidden: 1.0 MHz"));
        const auto end = double(start + 3600000);
        chart.setHistoryWindow(historyRetentionMs, true);
        QCOMPARE(chart.timeRange(), qMakePair(double(start), end));
        chart.setHistoryWindow(historyRetentionMs, false);
        QCOMPARE(chart.timeRange(), qMakePair(end - historyRetentionMs, end));
        chart.setHistoryWindow(300000, true);
        QCOMPARE(chart.timeRange(), qMakePair(end - 300000, end));
        QCOMPARE(chart.history("hidden", end - 10000).size(), 22); // Includes the clipping boundary.
        chart.sample({{"hidden", 1}}, 500, start + historyRetentionMs + 1000);
        const auto retained = chart.history("hidden");
        QCOMPARE(retained.first().x(), double(start + 1000));
        chart.setHistoryWindow(historyRetentionMs, true);
        QCOMPARE(chart.timeRange().first, double(start + 1000));
    }
    void monitorHistorySettings() {
        QTemporaryDir config; qputenv("XDG_CONFIG_HOME", config.path().toUtf8());
        QSettings::setPath(QSettings::NativeFormat, QSettings::UserScope, config.path());
        {
            Window window;
            auto *slider = window.findChild<QSlider *>("monitorHistory"); QVERIFY(slider);
            auto *stretch = window.findChild<QCheckBox *>("monitorStretch"); QVERIFY(stretch);
            QCOMPARE(slider->value(), 1000); QVERIFY(stretch->isChecked());
            slider->setValue(0); stretch->setChecked(false);
            for (auto *chart : window.findChildren<Chart *>())
                QCOMPARE(chart->timeRange().second - chart->timeRange().first, 300000.);
            slider->setValue(500);
            QSettings settings("fedora-tools", "framework-laptop-tools");
            const int minutes = settings.value("monitor/historyMinutes").toInt();
            QVERIFY(minutes >= 84 && minutes <= 86); // Geometric, not arithmetic, midpoint.
        }
        Window restored;
        QCOMPARE(restored.findChild<QSlider *>("monitorHistory")->value(), 500);
        QVERIFY(!restored.findChild<QCheckBox *>("monitorStretch")->isChecked());
        QSettings settings("fedora-tools", "framework-laptop-tools");
        settings.setValue("tray/historyMs", 86400000);
        TrayPage tray(settings, {{"cpu-usage", "CPU usage", {}, "%"}});
        QCOMPARE(tray.iconStyle().historyMs, qint64(60000)); // Retired choices use the new default.
    }
    void denseHistoryShowsPeakColumns() {
        Chart chart("%"); chart.resize(600, 200); chart.addSeries("sensor"); chart.setSelected("sensor", true);
        const qint64 start = 100000000;
        // A half-second spike fills its column up to the maximum.
        for (int i = 0; i <= 172800; ++i)
            chart.sample({{"sensor", i == 43200 ? 100. : 10.}}, 500, start + i * 500);
        QCOMPARE(chart.history("sensor").size(), 172801);
        QVERIFY(chart.readingAt(start + 43200 * 500).contains("sensor: 100 %"));
        const auto image = chart.grab().toImage();
        const auto shot = qEnvironmentVariable("FRAMEWORK_TOOLS_AVERAGE_SCREENSHOT");
        if (!shot.isEmpty()) QVERIFY(image.save(shot));
        bool peak = false;
        for (int y = 15; y < 60; ++y) for (int x = 100; x < 550; ++x) {
            const auto colour = image.pixelColor(x, y);
            peak |= colour == chart.color("sensor");
        }
        QVERIFY(peak);
        chart.setHistoryWindow(300000, true);
        const auto recent = chart.grab().toImage();
        for (int y = 15; y < 60; ++y) for (int x = 100; x < 550; ++x)
            QVERIFY(recent.pixelColor(x, y) != chart.color("sensor"));
    }
    void logicalTicks() {
        const auto freq = AxisTicks::covering(0, 4681, 4);
        QCOMPARE(freq.minimum, 0.); QCOMPARE(freq.maximum, 6000.); QCOMPARE(freq.step, 2000.);
        const auto rate = AxisTicks::covering(-13, 42, 4);
        QCOMPARE(rate.minimum, -20.); QCOMPARE(rate.maximum, 60.); QCOMPARE(rate.step, 20.);
        QCOMPARE(timeTickStep(3600000, 6), 720000.); // 0.2 h, not a repeating decimal.
        QCOMPARE(timeTickStep(3600000, 3), 1800000.);
        QCOMPARE(timeTickStep(240000, 8), 30000.);
        QCOMPARE(timeTickStep(60000, 8), 12000.); // 0.2 min.
        QCOMPARE(ageLabel(7200000, 7200000), QString("2h"));
        QCOMPARE(ageLabel(1800000, 7200000), QString("0.5h"));
        QCOMPARE(ageLabel(1200000, 1200000), QString("20min"));
        QCOMPARE(ageLabel(210000, 240000), QString("3.5min"));
        QCOMPARE(ageLabel(150000, 240000), QString("2.5min"));
        QCOMPARE(ageLabel(90000, 240000), QString("1.5min"));
        QCOMPARE(ageLabel(30000, 240000), QString("0.5min"));
        QCOMPARE(ageLabel(5000, 10000), QString("5s"));
        QCOMPARE(ageLabel(0, 240000), QString("Now"));
    }
    void historyHoverAndSleep() {
        Chart chart("%"); chart.addSeries("battery", "Charge level"); chart.setSelected("battery", true);
        chart.addSeries("rate", "Battery rate", "W"); chart.setSelected("rate", true);
        chart.sample({{"battery", 75}, {"rate", -10}}, 30000, 100000);
        chart.setPowerState(false, true, 100000);
        QVERIFY(chart.readingAt(100000).contains("Charge level: 75 %"));
        QVERIFY(chart.readingAt(100000).contains("Battery rate: -10 W"));
        QVERIFY(chart.readingAt(100000).contains("Charger connected"));
        chart.setPowerState(true, true, 105000);
        QVERIFY(chart.readingAt(106000).contains("Asleep"));
        QVERIFY(chart.readingAt(106000).contains("Battery rate: —"));
        QVERIFY(!chart.readingAt(106000).contains("Charger connected"));
        chart.setPowerState(false, false, 110000);
        QVERIFY(chart.readingAt(111000).contains("Charge level: —")); // Don't reach back across even a short sleep.
        chart.sample({{"battery", 74}, {"rate", -8}}, 30000, 112000);
        QVERIFY(chart.readingAt(112000).contains("Charge level: 74 %"));
        chart.setSelected("rate", false);
        QVERIFY(!chart.readingAt(112000).contains("Battery rate"));
        QVERIFY(chart.readingAt(200000).contains("Charge level: —"));
        chart.sample({}, 30000, historyRetentionMs + 200000);
        chart.sample({}, 30000, historyRetentionMs + 230000);
        QVERIFY(!chart.readingAt(106000).contains("Asleep")); // Annotations expire with samples.
    }
    void samplingIntervalChanges_data() {
        QTest::addColumn<int>("before"); QTest::addColumn<int>("after");
        QTest::newRow("battery-faster") << 60000 << 15000;
        QTest::newRow("battery-slower") << 15000 << 60000;
        QTest::newRow("fast-sensors-faster") << 2000 << 500;
        QTest::newRow("fast-sensors-slower") << 500 << 2000;
    }
    void samplingIntervalChanges() {
        QFETCH(int, before); QFETCH(int, after);
        Chart changed("%"), reference("%");
        for (auto *chart : {&changed, &reference}) {
            chart->resize(850, 240); chart->addSeries("battery", "Battery");
            chart->setSelected("battery", true); chart->setHistoryWindow(300000, false);
            for (int i = 0; i < 4; ++i) chart->sample({{"battery", 50}}, before, i * before);
        }
        const qint64 now = 3 * before + after;
        changed.sample({{"battery", 50}}, after, now);
        reference.sample({{"battery", 50}}, std::max(before, after), now);
        const auto history = changed.history("battery");
        QCOMPARE(history.size(), 5);
        for (const auto &point : history) QVERIFY(std::isfinite(point.y()));
        QVERIFY(changed.readingAt(before / 2).contains("Battery: 50 %"));
        QCOMPARE(changed.grab().toImage(), reference.grab().toImage());
        TrayStyle style; style.historyMs = 300000;
        QCOMPARE(telemetryIcon(true, history, "%", style, now).pixmap(64, 64).toImage(),
                 telemetryIcon(true, reference.history("battery"), "%", style, now).pixmap(64, 64).toImage());
    }
    void intervalChangesPreserveGaps() {
        Chart chart("%"); chart.addSeries("battery", "Battery"); chart.setSelected("battery", true);
        for (qint64 time : {0, 15000, 90000}) chart.sample({{"battery", 50}}, 15000, time);
        chart.sample({}, 15000, 105000);
        chart.sample({{"battery", 50}}, 15000, 120000);
        chart.setPowerState(true, {}, 125000); chart.setPowerState(false, false, 130000);
        chart.sample({{"battery", 50}}, 15000, 135000);
        chart.sample({{"battery", 50}}, 60000, 195000);
        const auto history = chart.history("battery");
        for (double gap : {90000., 105000., 135000.})
            QVERIFY(std::any_of(history.cbegin(), history.cend(), [gap](const QPointF &p) {
                return p.x() == gap && !std::isfinite(p.y());
            }));
        QVERIFY(chart.readingAt(45000).contains("Battery: —"));
        QVERIFY(chart.readingAt(105000).contains("Battery: —"));
        QVERIFY(chart.readingAt(127000).contains("Battery: —"));
        QVERIFY(chart.readingAt(120000).contains("Battery: 50 %"));
    }
    void intervalHistoryRetainsBoundary() {
        Chart chart("%"); chart.addSeries("battery", "Battery"); chart.setSelected("battery", true);
        chart.sample({{"battery", 50}}, 60000, 0);
        chart.sample({{"battery", 50}}, 60000, 60000);
        chart.sample({{"battery", 50}}, 15000, 120000);
        chart.sample({{"battery", 50}}, 15000, historyRetentionMs + 61000);
        const auto history = chart.history("battery");
        QCOMPARE(history.first().x(), 60000.);
        QCOMPARE(history[1], QPointF(120000, 50)); // No artificial gap at the cadence transition.
        QVERIFY(chart.readingAt(90000).contains("Battery: 50 %"));
        chart.sample({{"battery", 50}}, 15000, historyRetentionMs + 121000);
        QVERIFY(chart.readingAt(30000).contains("Battery: —")); // The old boundary has expired.
    }
    void clickableLegend() {
        Chart chart("MHz"); chart.addSeries("cpu"); chart.setSelected("cpu", true);
        Legend legend(&chart, {{"cpu", "CPU average", {}, "MHz"}});
        QCOMPARE(legend.enabledCount(), 1);
        QSignalSpy changed(&legend, &Legend::selectionChanged);
        QVERIFY(QMetaObject::invokeMethod(&legend, "linkActivated", Q_ARG(QString, "0")));
        QVERIFY(!chart.selected("cpu")); QCOMPARE(changed.count(), 1);
        QVERIFY(legend.text().contains("line-through"));
        QTextDocument doc; doc.setHtml(legend.text());
        bool strike = false;
        for (auto block = doc.begin(); block.isValid(); block = block.next()) for (auto it = block.begin(); !it.atEnd(); ++it) {
            const auto format = it.fragment().charFormat(); QVERIFY(!format.fontUnderline()); strike |= format.fontStrikeOut();
        }
        QVERIFY(strike);
        QVERIFY(QMetaObject::invokeMethod(&legend, "linkActivated", Q_ARG(QString, "0")));
        QVERIFY(chart.selected("cpu")); QCOMPARE(legend.enabledCount(), 1);
    }
    void cpuUsageAndTray() {
        CpuUsage usage;
        QVERIFY(!usage.sample("cpu 10 0 10 80 0 0 0 0 10 0"));
        QCOMPARE(usage.sample("cpu 30 0 10 160 0 0 0 0 30 0"), std::optional<double>(20.));
        usage.reset(); QVERIFY(!usage.sample("cpu 30 0 10 160 0 0 0 0"));
        QVERIFY(!usage.sample("cpu 1 0 1 1 0 0 0 0")); // Counter reset.
        QVERIFY(!usage.sample("not available"));
        TrayStyle style; style.borderColor = Qt::white; style.backgroundColor = Qt::black;
        style.lineColor = Qt::cyan; style.fillColor = Qt::blue; style.outsideColor = Qt::red;
        for (bool graph : {false, true}) for (const auto &values : {QVector<QPointF>{}, QVector<QPointF>{{0, 10}, {1, 20}, {2, NAN}, {3, 30}}}) {
            const auto icon = telemetryIcon(graph, values, "%", style);
            QVERIFY(!icon.isNull()); QVERIFY(!icon.pixmap(24, 24).isNull());
        }
    }
    void trayBoundsAndAppearance() {
        TrayStyle style; style.borderColor = Qt::white; style.backgroundColor = Qt::black;
        style.historyMs = 10;
        style.lineColor = Qt::green; style.fillColor = Qt::blue; style.outsideColor = Qt::red; style.fill = false;
        auto render = [&] { return telemetryIcon(true, {{0, 120}, {10, 120}}, "%", style, 10).pixmap(64, 64).toImage(); };
        auto image = render();
        QCOMPARE(image.pixelColor(32, 1), QColor(Qt::white));
        QCOMPARE(image.pixelColor(32, 3), QColor(Qt::red));
        QCOMPARE(image.pixelColor(32, 32), QColor(Qt::black));
        style.clamp = false; image = render(); QCOMPARE(image.pixelColor(32, 3), QColor(Qt::black));
        style.border = false; style.backgroundColor = Qt::transparent; image = render(); QCOMPARE(image.pixelColor(32, 1).alpha(), 0);
        style.clamp = true; style.overflowColor = false; image = render(); QCOMPARE(image.pixelColor(32, 1), QColor(Qt::green));
        QVERIFY(trayPlotRect(true).width() < trayPlotRect(false).width());
        style.fill = true;
        image = telemetryIcon(true, {{0, 50}, {10, 50}}, "%", style, 10).pixmap(64, 64).toImage();
        QCOMPARE(image.pixelColor(32, 50), QColor(Qt::blue));
        QCOMPARE(image.pixelColor(32, 10).alpha(), 0);
    }
    void trayHistoryWindow() {
        TrayStyle style; style.borderColor = Qt::white; style.backgroundColor = Qt::black;
        style.lineColor = Qt::green; style.fillColor = Qt::blue; style.fill = false;
        style.historyMs = 60000;
        const QVector<QPointF> points{{0, 50}, {60000, 50}, {90000, 50}};
        auto render = [&](qint64 now) { return telemetryIcon(true, points, "%", style, now).pixmap(64, 64).toImage(); };
        auto image = render(120000);
        QCOMPARE(image.pixelColor(10, 32), QColor(Qt::green)); // Segment crossing the left boundary is clipped.
        QCOMPARE(image.pixelColor(50, 32), QColor(Qt::black)); // No extrapolation from the latest sample to now.
        QCOMPARE(image.pixelColor(1, 32), QColor(Qt::white)); // Clipping preserves the border.
        image = render(240000);
        QCOMPARE(image.pixelColor(32, 32), QColor(Qt::black)); // All readings have expired from the view.
        style.historyMs = 120000;
        image = render(90000);
        QCOMPARE(image.pixelColor(5, 32), QColor(Qt::black)); // Unavailable older history stays blank.
        QCOMPARE(image.pixelColor(32, 32), QColor(Qt::green));
        style.fill = true;
        image = telemetryIcon(true, {{0, 50}, {30000, 50}, {60000, NAN}, {90000, 50}, {120000, 50}}, "%", style, 120000).pixmap(64, 64).toImage();
        QCOMPARE(image.pixelColor(10, 50), QColor(Qt::blue));
        QCOMPARE(image.pixelColor(32, 50), QColor(Qt::black)); // Sleep/data gaps remain gaps.
        const auto number = telemetryIcon(false, points, "%", style, 120000).pixmap(64, 64).toImage();
        style.historyMs = 10000;
        QCOMPARE(telemetryIcon(false, points, "%", style, 120000).pixmap(64, 64).toImage(), number);
        QCOMPARE(image.pixelColor(60, 32), QColor(Qt::green));
    }
    void trayShowsPeakColumns() {
        TrayStyle style; style.border = false; style.backgroundColor = Qt::black;
        style.lineColor = Qt::green; style.fill = false; style.historyMs = 300000;
        QVector<QPointF> points;
        for (int i = 0; i <= 600; ++i) points.append({double(i * 500), i == 300 ? 100. : 10.});
        const auto image = telemetryIcon(true, points, "%", style, 300000).pixmap(64, 64).toImage();
        const auto shot = qEnvironmentVariable("FRAMEWORK_TOOLS_AVERAGE_SCREENSHOT");
        if (!shot.isEmpty()) QVERIFY(image.save(shot + ".tray.png"));
        bool band = false;
        for (int y = 4; y < 30; ++y) for (int x = 20; x < 45; ++x) {
            const auto colour = image.pixelColor(x, y);
            band |= colour == QColor(Qt::green);
        }
        QVERIFY(band);
        bool mean = false;
        for (int y = 50; y < 62; ++y) for (int x = 5; x < 59; ++x)
            mean |= image.pixelColor(x, y) == QColor(Qt::green);
        QVERIFY(mean);
    }
    void sharedHistoryAndTrayScales() {
        Chart chart("MHz"); chart.addSeries("cpu"); chart.addSeries("gpu");
        chart.sample({{"cpu", 1000}, {"gpu", 500}}, 1000, 1000);
        chart.sample({{"cpu", 1200}, {"gpu", 600}}, 1000, 2000);
        QCOMPARE(chart.history("gpu").size(), 2); // Even never-selected sensors already have history.
        chart.setSelected("cpu", true); chart.setSelected("cpu", false);
        QCOMPARE(chart.history("cpu").last().y(), 1200.);
        chart.setPowerState(true, {}, 2100); chart.setPowerState(false, {}, 2500);
        chart.sample({{"cpu", 1100}}, 1000, 2600);
        QVERIFY(std::isnan(chart.history("cpu")[2].y()));
        QTemporaryDir root; QSettings settings(root.filePath("tray.ini"), QSettings::IniFormat);
        TrayPage page(settings, {{"cpu", "CPU", {}, "MHz"}, {"temp", "CPU temperature", {}, "°C"}, {"rate", "Battery rate", {}, "W"}});
        const auto original = page.draft();
        auto *history = page.findChild<QComboBox *>("trayHistory"); QVERIFY(history);
        QCOMPARE(page.iconStyle().historyMs, qint64(60000));
        QCOMPARE(history->count(), 7);
        const QList<int> spans{10000, 15000, 20000, 30000, 60000, 120000, 300000};
        for (int i = 0; i < spans.size(); ++i) QCOMPARE(history->itemData(i).toInt(), spans[i]);
        history->setCurrentIndex(history->findData(300000));
        QCOMPARE(page.iconStyle().historyMs, qint64(300000));
        auto *mode = page.findChild<QComboBox *>("trayDisplayMode"); mode->setCurrentIndex(1);
        auto *metric = page.findChild<QComboBox *>("trayMetric");
        auto *minimum = page.findChild<QDoubleSpinBox *>("trayMinimum"); auto *maximum = page.findChild<QDoubleSpinBox *>("trayMaximum");
        maximum->setValue(4500); QCOMPARE(page.iconStyle().maximum, 4500.);
        metric->setCurrentIndex(1); minimum->setValue(30); maximum->setValue(90);
        QCOMPARE(page.iconStyle().minimum, 30.); QCOMPARE(page.iconStyle().maximum, 90.);
        metric->setCurrentIndex(0); QCOMPARE(page.iconStyle().minimum, 0.); QCOMPARE(page.iconStyle().maximum, 4500.);
        metric->setCurrentIndex(1); QCOMPARE(page.iconStyle().minimum, 30.); QCOMPARE(page.iconStyle().maximum, 90.);
        metric->setCurrentIndex(2); minimum->setValue(-40); maximum->setValue(65);
        QCOMPARE(page.iconStyle().minimum, -40.); QCOMPARE(page.iconStyle().maximum, 65.);
        metric->setCurrentIndex(1); metric->setCurrentIndex(2);
        QCOMPARE(page.iconStyle().minimum, -40.); QCOMPARE(page.iconStyle().maximum, 65.);
        const QString shot = qEnvironmentVariable("FRAMEWORK_TOOLS_TRAY_SCREENSHOT");
        if (!shot.isEmpty()) { page.resize(700, 780); page.show(); QTest::qWait(10); QVERIFY(page.grab().save(shot)); }
        QVERIFY(settings.allKeys().isEmpty()); // Editing never writes persistent settings.
        page.load(original);
        QCOMPARE(history->currentData().toInt(), 60000);
        QCOMPARE(mode->currentIndex(), 0); QCOMPARE(metric->currentIndex(), 0);
        QVERIFY(!settings.contains("tray/scales/rate/minimum"));
    }
    void chartRendering() {
        Chart chart("%"); chart.resize(850, 240);
        chart.addSeries("battery", "Battery"); chart.setSelected("battery", true);
        chart.addSeries("rate", "Charge / discharge", "W"); chart.setSelected("rate", true);
        const qint64 now = QDateTime::currentMSecsSinceEpoch();
        for (int i = 0; i <= 120; ++i) {
            const auto t = now - 3600000 + i * 30000;
            if (i == 20) chart.setPowerState(true, {}, t);
            if (i == 40) chart.setPowerState(false, false, t);
            if (i == 60) chart.setPowerState(false, true, t);
            if (i < 20 || i >= 40) chart.sample({{"battery", 50 + i * .25}, {"rate", i < 60 ? -12. : 35.}}, 30000, t);
        }
        chart.show(); QTest::qWait(10);
        const QString screenshot = qEnvironmentVariable("FRAMEWORK_TOOLS_CHART_SCREENSHOT");
        if (!screenshot.isEmpty()) QVERIFY(chart.grab().save(screenshot));
        QPalette dark = chart.palette(); dark.setColor(QPalette::Window, QColor("#232629"));
        dark.setColor(QPalette::Text, QColor("#eff0f1")); dark.setColor(QPalette::Mid, QColor("#45494c"));
        chart.setPalette(dark); chart.setAutoFillBackground(true);
        if (!screenshot.isEmpty()) QVERIFY(chart.grab().save(screenshot + ".dark.png"));
        const auto before = chart.grab().toImage();
        QTest::mouseMove(&chart, QPoint(400, 100)); QTest::qWait(10);
        QVERIFY(chart.grab().toImage() != before);
        if (!screenshot.isEmpty()) QVERIFY(chart.grab().save(screenshot + ".hover.png"));
        QEvent leave(QEvent::Leave); QApplication::sendEvent(&chart, &leave);
        chart.resize(320, 175); QTest::qWait(10);
        QVERIFY(!chart.grab().isNull());
    }
    void hoverDoesNotAdvanceChart() {
        Chart chart("MHz"); chart.resize(850, 240);
        chart.addSeries("cpu"); chart.setSelected("cpu", true);
        const qint64 now = QDateTime::currentMSecsSinceEpoch();
        chart.sample({{"cpu", 1000}}, 1000, now - 2000);
        chart.sample({{"cpu", 3000}}, 1000, now - 1000);
        chart.sample({{"cpu", 2000}}, 1000, now);
        chart.show(); QTest::qWait(10);
        QTest::mouseMove(&chart, QPoint(1, 1));
        const auto before = chart.grab().toImage();
        QTest::mouseMove(&chart, QPoint(400, 100));
        QVERIFY(chart.hoverTime().has_value());
        QVERIFY(chart.grab().toImage() != before);
        QTest::qWait(100);
        QEvent leave(QEvent::Leave); QApplication::sendEvent(&chart, &leave);
        QCOMPARE(chart.grab().toImage(), before);
        chart.sample({{"cpu", 2500}}, 1000, now + 1000);
        QVERIFY(chart.grab().toImage() != before);
    }
    void chartRefreshesAfterDisplayChanges() {
        Chart chart("MHz"); chart.resize(650, 240);
        chart.addSeries("cpu"); chart.setSelected("cpu", true);
        chart.sample({{"cpu", 1000}}, 1000, 100000);
        chart.sample({{"cpu", 2000}}, 1000, 101000);
        chart.show(); QVERIFY(QTest::qWaitForWindowExposed(&chart));
        QTest::mouseMove(&chart, QPoint(1, 1));
        const auto original = chart.grab().toImage();
        QCOMPARE(chart.grab().toImage(), original);
        chart.setSelected("cpu", false);
        QVERIFY(chart.grab().toImage() != original);
        chart.setSelected("cpu", true);
        QCOMPARE(chart.grab().toImage(), original);
        chart.setHistoryWindow(300000, false);
        const auto unstretched = chart.grab().toImage();
        QVERIFY(unstretched != original);
        auto palette = chart.palette(); palette.setColor(QPalette::Text, Qt::red);
        chart.setPalette(palette);
        const auto recoloured = chart.grab().toImage();
        QVERIFY(recoloured != unstretched);
        auto font = chart.font(); font.setPointSizeF(font.pointSizeF() + 2); chart.setFont(font);
        QVERIFY(chart.grab().toImage() != recoloured);
        chart.resize(800, 240);
        QCOMPARE(chart.grab().size(), QSize(800, 240) * chart.devicePixelRatioF());
    }
    void stationaryHoverFollowsSamples() {
        Chart chart("W"); chart.resize(850, 240);
        chart.addSeries("power"); chart.setSelected("power", true);
        chart.setHistoryWindow(300000, false);
        const qint64 now = QDateTime::currentMSecsSinceEpoch();
        chart.sample({{"power", 1}}, 1000, now);
        chart.show(); QVERIFY(QTest::qWaitForWindowExposed(&chart));
        // Wayland does not support QTest's global cursor warp. Send a local move.
        const QPoint position(400, 100);
        QMouseEvent move(QEvent::MouseMove, position, chart.mapToGlobal(position),
                         Qt::NoButton, Qt::NoButton, Qt::NoModifier);
        QApplication::sendEvent(&chart, &move);
        auto *popup = chart.findChild<QLabel *>("chartReadingPopup");
        QVERIFY(popup); QVERIFY(popup->isVisible());
        const auto time = chart.hoverTime(); QVERIFY(time);
        const QString text = popup->text();
        chart.sample({{"power", 2}}, 1000, now + 1000);
        QCOMPARE(chart.hoverTime(), std::optional<qint64>(*time + 1000));
        QVERIFY(popup->text() != text);
        QCOMPARE(popup->text(), chart.readingAt(*chart.hoverTime()));
        QTest::qWait(11000); // Past the usual tooltip inactivity timeout, without moving.
        QVERIFY(popup->isVisible());
        chart.hide(); QVERIFY(!popup->isVisible()); QVERIFY(!chart.hoverTime());
    }
    void sliderAndNumberStaySynchronized() {
        ValueControl control;
        control.setRange(400, 4800); control.setSuffix(" MHz"); control.setSingleStep(100);
        auto *slider = control.findChild<QSlider *>(); auto *number = control.findChild<QSpinBox *>();
        QVERIFY(slider); QVERIFY(number);
        QCOMPARE(slider->minimum(), 400); QCOMPARE(slider->maximum(), 4800);
        QCOMPARE(slider->singleStep(), 100);
        QSignalSpy changed(&control, &ValueControl::valueChanged);
        slider->setValue(4500);
        QCOMPARE(number->value(), 4500); QCOMPARE(control.value(), 4500); QCOMPARE(changed.count(), 1);
        number->setValue(1234);
        QCOMPARE(slider->value(), 1234); QCOMPARE(changed.count(), 2);
        control.setRange(1500, 3300);
        QCOMPARE(slider->value(), 1500); QCOMPARE(number->value(), 1500);
        control.setValue(5000);
        QCOMPARE(slider->value(), 3300); QCOMPARE(control.value(), 3300);
        control.setEnabled(false);
        QVERIFY(!slider->isEnabled()); QVERIFY(!number->isEnabled());
        control.setEnabled(true);
        control.setRange(0, 75); control.setSuffix(" W"); control.setSpecialValueText("Firmware default");
        slider->setValue(0);
        QCOMPARE(number->text(), QString("Firmware default"));
    }
    void slidersJumpToClick() {
        JumpSlider slider(Qt::Horizontal); slider.setRange(0, 100); slider.setPageStep(10);
        slider.resize(400, 40); slider.show();
        const QPoint target(300, 20);
        for (bool inverted : {false, true}) {
            slider.setInvertedAppearance(inverted); slider.setValue(50);
            QTest::mousePress(&slider, Qt::LeftButton, Qt::NoModifier, target);
            QVERIFY(slider.isSliderDown());
            QVERIFY(inverted ? slider.value() < 30 : slider.value() > 70);
            const int pressed = slider.value();
            QTest::qWait(550); QCOMPARE(slider.value(), pressed); // No page-step auto-repeat.
            QTest::mouseMove(&slider, QPoint(200, 20));
            QVERIFY(std::abs(slider.value() - 50) <= 1);
            QTest::mouseRelease(&slider, Qt::LeftButton, Qt::NoModifier, QPoint(200, 20));
            QVERIFY(!slider.isSliderDown());
        }
        slider.setInvertedAppearance(false); slider.setLayoutDirection(Qt::RightToLeft); slider.setValue(50);
        QTest::mouseClick(&slider, Qt::LeftButton, Qt::NoModifier, target); QVERIFY(slider.value() < 30);
        slider.setLayoutDirection(Qt::LeftToRight); slider.setValue(50);
        QTest::keyClick(&slider, Qt::Key_Right); QCOMPARE(slider.value(), 51);
        slider.setEnabled(false); QTest::mouseClick(&slider, Qt::LeftButton, Qt::NoModifier, target);
        QCOMPARE(slider.value(), 51);
    }
    void pagesAndReadOnlyStartup() {
        QTemporaryDir config;
        qputenv("XDG_CONFIG_HOME", config.path().toUtf8());
        QSettings::setPath(QSettings::NativeFormat, QSettings::UserScope, config.path());
        QSettings settings("fedora-tools", "framework-laptop-tools");
        settings.setValue("sampling/fast", 0);
        settings.setValue("sampling/battery", -5);
        Window window; window.show(); QTest::qWait(500);
        QCOMPARE(settings.value("sampling/fast").toInt(), 1000);
        QCOMPARE(settings.value("sampling/battery").toInt(), 30000);
        auto *tabs = window.findChild<QTabWidget *>(); QVERIFY(tabs); QCOMPARE(tabs->count(), 7);
        QCOMPARE(tabs->tabText(1), QString("Lighting"));
        QCOMPARE(tabs->tabText(2), QString("Cooling"));
        QCOMPARE(tabs->tabText(3), QString("Battery"));
        QCOMPARE(tabs->tabText(4), QString("CPU"));
        QCOMPARE(tabs->tabText(5), QString("Tray icon"));
        QCOMPARE(window.findChildren<Chart *>().size(), 5);
        auto *powerChart = window.findChild<Chart *>("powerChart"); QVERIFY(powerChart);
        for (QWidget *ancestor = powerChart; ancestor; ancestor = ancestor->parentWidget())
            QVERIFY(ancestor->toolTip().isEmpty()); // No inherited help tooltip obscures graph readings.
        const qreal titleSize = window.findChild<QLabel *>("chartTitle")->font().pointSizeF();
        for (auto *group : window.findChildren<QGroupBox *>("settingsSection")) {
            group->ensurePolished(); QCOMPARE(group->font().pointSizeF(), titleSize);
        }
        for (const auto *name : {"batteryCpuProfile", "acCpuProfile"}) {
            auto *group = window.findChild<QGroupBox *>(name); QVERIFY(group);
            group->ensurePolished(); QCOMPARE(group->font().pointSizeF(), titleSize);
            for (auto *combo : group->findChildren<QComboBox *>())
                QCOMPARE(combo->font().pointSizeF(), titleSize - 2);
        }
        QCOMPARE(window.findChild<QLabel *>("trayHoverTitle")->font().pointSizeF(), titleSize - 2);
        QCOMPARE(window.findChild<QLabel *>("trayIconTitle")->font().pointSizeF(), titleSize);
        QCOMPARE(window.findChild<QCheckBox *>("hover/cpu")->font().pointSizeF(), titleSize - 2);
        for (auto *slider : window.findChildren<QSlider *>()) {
            QVERIFY(slider->style()->styleHint(QStyle::SH_Slider_AbsoluteSetButtons, nullptr, slider) & Qt::LeftButton);
            QVERIFY(!(slider->style()->styleHint(QStyle::SH_Slider_PageSetButtons, nullptr, slider) & Qt::LeftButton));
        }
        for (auto *title : window.findChildren<QLabel *>("chartTitle")) {
            if (title->text() == "Fan speed" || title->text() == "Battery") continue;
            QVERIFY(std::abs(title->geometry().center().x() - title->parentWidget()->rect().center().x()) <= 2);
        }
        for (auto *toggle : window.findChildren<QToolButton *>("extraTemperatureSensors")) QVERIFY(!toggle->isChecked());
        const QString monitor = qEnvironmentVariable("FRAMEWORK_TOOLS_MONITOR_SCREENSHOT");
        if (!monitor.isEmpty()) QVERIFY(window.grab().save(monitor));
        tabs->setCurrentIndex(1); QTest::qWait(50);
        auto *powerAuto = window.findChild<QCheckBox *>("powerAuto"); QVERIFY(powerAuto);
        auto *brightness = window.findChild<ValueControl *>("powerBrightness"); QVERIFY(brightness);
        powerAuto->setChecked(true); QVERIFY(!brightness->isEnabledTo(brightness->parentWidget()));
        powerAuto->setChecked(false); QVERIFY(brightness->isEnabledTo(brightness->parentWidget()));
        brightness->setValue(42);
        auto *keyboard = window.findChild<ValueControl *>("keyboardBrightness"); QVERIFY(keyboard); keyboard->setValue(37);
        QTest::qWait(2300); // Automatic firmware refresh must not discard unsaved lighting edits.
        QCOMPARE(brightness->value(), 42); QVERIFY(!powerAuto->isChecked()); QCOMPARE(keyboard->value(), 37);
        const QString screenshot = qEnvironmentVariable("FRAMEWORK_TOOLS_SCREENSHOT");
        if (!screenshot.isEmpty()) QVERIFY(window.grab().save(screenshot));
        tabs->setCurrentIndex(2); QTest::qWait(50);
    }
    void cpuProfileDrafts() {
        CpuPage page;
        QVERIFY(!page.findChild<QCheckBox *>("enableCpuOverrides"));
        auto *battery = page.findChild<QGroupBox *>("batteryCpuProfile"); QVERIFY(battery->isEnabled());
        auto *frequency = battery->findChild<QCheckBox *>("overrideFrequency"); QVERIFY(frequency); QVERIFY(!frequency->isChecked());
        QVERIFY(!battery->findChild<ValueControl *>()->isEnabled());
        QCOMPARE(battery->findChild<QComboBox *>("cpuGovernor")->currentText(), QString("auto"));
        QCOMPARE(battery->findChild<QComboBox *>("cpuPreference")->currentText(), QString("auto"));
        for (auto *spin : page.findChildren<ValueControl *>()) spin->setRange(400, 10000);
        for (auto *combo : page.findChildren<QComboBox *>()) {
            if (combo->count() == 1) combo->addItems({"powersave", "performance", "balance_power"});
        }
        const QVariantMap profile{{"minimum", 1000}, {"maximum", 2000}, {"governor", "powersave"}, {"preference", "balance_power"}};
        const QVariantMap saved{{"enabled", true}, {"separate", false}, {"battery", profile}};
        page.load(saved, true);
        auto *split = page.findChild<QCheckBox *>("separateCpuProfiles"); QVERIFY(split);
        QVERIFY(!page.dirty()); QVERIFY(!page.draft().contains("ac"));
        split->setChecked(true);
        QCOMPARE(page.draft()["ac"], page.draft()["battery"]);
        QVERIFY(frequency->isChecked());
        auto *ac = page.findChild<QGroupBox *>("acCpuProfile"); QVERIFY(ac);
        auto boxes = ac->findChildren<ValueControl *>(); QVERIFY(boxes.size() >= 2);
        const bool grouped = page.draft()["ac"].toMap().contains("bounds");
        boxes[grouped ? 3 : 1]->setValue(3000);
        split->setChecked(false);
        QVERIFY(page.dirty()); QVERIFY(!page.draft().contains("ac"));
        page.load(saved); // Background refresh must not replace unsaved edits.
        split->setChecked(true);
        QCOMPARE(grouped ? page.draft()["ac"].toMap()["bounds"].toMap()["p"].toMap()["maximum"].toInt()
            : page.draft()["ac"].toMap()["maximum"].toInt(), 3000);
        split->setChecked(false);
        const auto joined = page.draft();
        page.load(joined, true); // Successful save commits removal of the AC copy.
        split->setChecked(true);
        QCOMPARE(page.draft()["ac"], page.draft()["battery"]);
        QVERIFY(page.dirty()); page.undo();
        QVERIFY(!page.dirty()); QVERIFY(!page.draft().contains("ac"));
        const QString screenshot = qEnvironmentVariable("FRAMEWORK_TOOLS_CPU_SCREENSHOT");
        if (!screenshot.isEmpty()) {
            split->setChecked(true); page.resize(1000, 720); page.show(); QTest::qWait(50);
            QVERIFY(page.grab().save(screenshot));
        }
    }
    void colorSwatchUsesRgb() {
        ColorButton button; button.setColor(QColor(0, 255, 0, 80)); button.resize(button.sizeHint()); button.show();
        QTest::qWait(10);
        QVERIFY(button.text().contains("31% opacity"));
        const auto picture = button.grab().toImage();
        bool pureGreen = false;
        for (int y = 0; y < picture.height(); ++y) for (int x = 0; x < picture.width(); ++x)
            pureGreen |= picture.pixelColor(x, y) == QColor(0, 255, 0);
        QVERIFY(pureGreen);
    }
    void coloursFollowActivationOrder() {
        Chart chart("°C");
        for (const auto &key : {"base", "x", "y"}) chart.addSeries(key);
        chart.setSelected("base", true); QCOMPARE(chart.color("base"), QColor("#3daee9"));
        chart.setSelected("x", true); const auto second = chart.color("x");
        chart.setSelected("y", true); const auto third = chart.color("y");
        QVERIFY(second != third); QVERIFY(second != chart.color("base"));
        QCOMPARE(chart.color("x"), second);
        chart.setSelected("x", false); chart.setSelected("y", false);
        chart.setSelected("y", true); chart.setSelected("x", true);
        QCOMPARE(chart.color("y"), second); QCOMPARE(chart.color("x"), third);
    }
    void sharedSaveAndUndo() {
        QTemporaryDir config; qputenv("XDG_CONFIG_HOME", config.path().toUtf8());
        QSettings::setPath(QSettings::NativeFormat, QSettings::UserScope, config.path());
        QSettings settings("fedora-tools", "framework-laptop-tools");
        Window window; window.show();
        auto *bar = window.findChild<QWidget *>("pendingChanges"); QVERIFY(bar);
        auto *save = window.findChild<QPushButton *>("saveAll");
        auto *undo = window.findChild<QPushButton *>("undoAll");
        auto *tabs = window.findChild<QTabWidget *>();
        QTRY_VERIFY(save->isEnabled()); QVERIFY(bar->isHidden());
        auto *fast = window.findChild<QComboBox *>("fastInterval");
        auto *mode = window.findChild<QComboBox *>("trayDisplayMode");
        auto *history = window.findChild<QComboBox *>("trayHistory");
        auto *autostart = window.findChild<QCheckBox *>("loginAutostart");
        auto *hoverCpu = window.findChild<QCheckBox *>("hover/cpu");
        auto *hoverApps = window.findChild<QSpinBox *>("hover/topApps");
        auto *trayIcon = window.findChild<QSystemTrayIcon *>();
        const QString path = config.path() + "/autostart/se.ajpanton.framework-laptop-tools.desktop";
        fast->setCurrentIndex(fast->findData(4000));
        QVERIFY(!bar->isHidden()); tabs->setCurrentIndex(5); mode->setCurrentIndex(1);
        history->setCurrentIndex(history->findData(300000));
        autostart->setChecked(true);
        hoverCpu->setChecked(false);
        hoverApps->setValue(2);
        QVERIFY(trayIcon->toolTip().startsWith("CPU ")); // Unsaved edits do not alter the live tooltip.
        QCOMPARE(settings.value("sampling/fast").toInt(), 1000);
        QVERIFY(!settings.contains("tray/mode")); QVERIFY(!QFile::exists(path));
        QVERIFY(!settings.contains("tray/historyMs"));
        tabs->setCurrentIndex(0); QVERIFY(!bar->isHidden());
        QTRY_VERIFY(undo->isEnabled()); undo->click();
        QVERIFY(bar->isHidden()); QCOMPARE(fast->currentData().toInt(), 1000); QCOMPARE(mode->currentIndex(), 0);
        QVERIFY(!autostart->isChecked()); QVERIFY(!QFile::exists(path));
        QVERIFY(hoverCpu->isChecked());
        QCOMPARE(hoverApps->value(), 0);
        QCOMPARE(history->currentData().toInt(), 60000);
        fast->setCurrentIndex(fast->findData(2000)); mode->setCurrentIndex(2); autostart->setChecked(true);
        history->setCurrentIndex(history->findData(60000));
        hoverCpu->setChecked(false);
        hoverApps->setValue(3);
        QTRY_VERIFY(save->isEnabled()); save->click();
        QVERIFY(bar->isHidden()); QCOMPARE(settings.value("sampling/fast").toInt(), 2000);
        QCOMPARE(settings.value("tray/icons/1/mode").toString(), QString("number")); QVERIFY(QFile::exists(path));
        QCOMPARE(settings.value("tray/icons/1/historyMs").toInt(), 60000);
        QVERIFY(!settings.value("tray/icons/1/hover/cpu").toBool());
        QCOMPARE(settings.value("tray/icons/1/hover/topApps").toInt(), 3);
        QVERIFY(!trayIcon->toolTip().startsWith("CPU "));
        hoverCpu->setChecked(true);
        hoverApps->setValue(1);
        history->setCurrentIndex(history->findData(30000));
        fast->setCurrentIndex(fast->findData(500)); mode->setCurrentIndex(1);
        QTRY_VERIFY(undo->isEnabled()); undo->click();
        QCOMPARE(fast->currentData().toInt(), 2000); QCOMPARE(mode->currentIndex(), 2); QVERIFY(bar->isHidden());
        QCOMPARE(history->currentData().toInt(), 60000);
        QVERIFY(!hoverCpu->isChecked());
        QCOMPARE(hoverApps->value(), 3);
        // Hover is a timestamp shared by every graph, not the same screen coordinate.
        const auto charts = window.findChildren<Chart *>(); QCOMPARE(charts.size(), 5);
        const qint64 time = QDateTime::currentMSecsSinceEpoch() - 1000;
        charts.first()->hovered(time);
        for (auto *chart : charts) QCOMPARE(chart->hoverTime(), std::optional<qint64>(time));
        charts.first()->hovered(-1);
        for (auto *chart : charts) QVERIFY(!chart->hoverTime());
    }
    void lowFanConfirmationCanBeCancelled() {
        QTemporaryDir config; qputenv("XDG_CONFIG_HOME", config.path().toUtf8());
        QSettings::setPath(QSettings::NativeFormat, QSettings::UserScope, config.path());
        Window window; window.show();
        auto *save = window.findChild<QPushButton *>("saveAll");
        QTRY_VERIFY(save->isEnabled());
        auto *mode = window.findChild<QComboBox *>("fanMode");
        auto *duty = window.findChild<ValueControl *>("fanDuty");
        mode->setCurrentIndex(1); duty->setValue(0);
        QVERIFY(!window.findChild<QLabel *>("lowFanWarning")->isHidden());
        bool sawConfirmation = false;
        QTimer::singleShot(0, &window, [&] {
            auto *dialog = qobject_cast<QMessageBox *>(QApplication::activeModalWidget());
            if (dialog) { sawConfirmation = dialog->text().contains("0%"); dialog->done(QMessageBox::Cancel); }
        });
        save->click(); QVERIFY(sawConfirmation);
        QVERIFY(!window.findChild<QWidget *>("pendingChanges")->isHidden());
        QVERIFY(save->isEnabled()); // No authorisation or hardware operation started.
        window.findChild<QPushButton *>("undoAll")->click();
        QVERIFY(window.findChild<QWidget *>("pendingChanges")->isHidden());
    }
};
QTEST_MAIN(WindowTest)
#include "test-window.moc"