from dataclasses import dataclass
from enum import Enum
from pathlib import Path
from typing import Literal


class Language(str, Enum):
    FI = "fi"
    SV = "sv"
    EN = "en"


LANGUAGE_DISPLAY_NAMES: dict[Language, str] = {
    Language.FI: "Finnish",
    Language.SV: "Swedish",
    Language.EN: "English",
}


@dataclass(frozen=True)
class Config:
    bot_token: str
    chat_id: str
    channel_username: str
    discussion_group_id: str = ""


@dataclass(frozen=True)
class LanguageAssets:
    language: Language
    text_file: Path
    text_raw: str
    images: list[Path]


@dataclass(frozen=True)
class ScanResult:
    global_images: list[Path]
    languages: list[LanguageAssets]


@dataclass(frozen=True)
class PlaceholderToken:
    label: str
    target_lang: Language
    source_span: tuple[int, int]


@dataclass
class PostedMessageRef:
    language: Language
    text_message_id: int | None
    caption_message_id: int | None
    message_url: str
    had_placeholders: bool
    text_mode: Literal["message", "caption", "none"]


@dataclass(frozen=True)
class TextSegmentBinding:
    message_id: int
    mode: Literal["message", "caption"]


@dataclass(frozen=True)
class LanguageBinding:
    language: Language
    image_message_ids: list[int]
    text_segments: list[TextSegmentBinding]
    primary_message_id: int | None
    primary_message_url: str
    discussion_message_id: int | None = None


@dataclass(frozen=True)
class PublishBinding:
    global_message_ids: list[int]
    global_attached_to_language: Language | None
    languages: dict[Language, LanguageBinding]
    discussion_message_ids: dict[int, int]
    global_primary_message_id: int | None = None
    global_discussion_message_id: int | None = None