from __future__ import annotations

import json
import subprocess
from pathlib import Path
from shutil import which


def require_exiftool() -> str:
    executable = which("exiftool")
    if executable:
        return executable
    raise RuntimeError(
        "exiftool was not found on PATH. Install ExifTool and make sure the "
        "'exiftool' command works before running this script."
    )


def run_exiftool_json(executable: str, paths: list[Path]) -> list[dict]:
    results: list[dict] = []
    for start in range(0, len(paths), 80):
        chunk = paths[start : start + 80]
        command = [
            executable,
            "-j",
            "-G",
            "-api",
            "QuickTimeUTC=1",
            "-charset",
            "filename=UTF8",
            *[str(path) for path in chunk],
        ]
        completed = subprocess.run(command, check=True, capture_output=True, text=True)
        results.extend(json.loads(completed.stdout or "[]"))
    return results


def run_exiftool_write(executable: str, path: Path, args: list[str]) -> None:
    if not args:
        return
    command = [
        executable,
        "-overwrite_original",
        "-charset",
        "filename=UTF8",
        *args,
        str(path),
    ]
    subprocess.run(command, check=True)