"""Lectura/escritura de la metadata cacheada de cada juego (info.json + icon.png)."""

from __future__ import annotations

import json
from dataclasses import asdict, dataclass, field
from pathlib import Path

from .paths import metadata_dir

INFO_NAME = "info.json"
ICON_NAME = "icon.png"


@dataclass
class GameMeta:
    description: str = ""
    version: str = ""
    default_branch: str = "main"
    updated_at: str = ""  # ISO-8601; lo rellena el worker tras un update
    topics: list[str] = field(default_factory=list)  # tags de Gitea (controller, sdl3…)
    created_at: str = ""  # ISO-8601 de creación del repo en Gitea (≈ lanzamiento)


def info_path(root: Path, game_id: str) -> Path:
    return metadata_dir(root, game_id) / INFO_NAME


def icon_path(root: Path, game_id: str) -> Path:
    return metadata_dir(root, game_id) / ICON_NAME


def load_meta(root: Path, game_id: str) -> GameMeta:
    """Lee info.json cacheado; devuelve GameMeta vacío si no existe o es ilegible."""
    path = info_path(root, game_id)
    if not path.exists():
        return GameMeta()
    try:
        data = json.loads(path.read_text(encoding="utf-8"))
    except (OSError, json.JSONDecodeError):
        return GameMeta()
    return GameMeta(
        description=data.get("description", ""),
        version=data.get("version", ""),
        default_branch=data.get("default_branch", "main"),
        updated_at=data.get("updated_at", ""),
        topics=list(data.get("topics", [])),
        created_at=data.get("created_at", ""),
    )


def save_meta(root: Path, game_id: str, meta: GameMeta) -> None:
    path = info_path(root, game_id)
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(
        json.dumps(asdict(meta), ensure_ascii=False, indent=2),
        encoding="utf-8",
    )


def has_icon(root: Path, game_id: str) -> bool:
    return icon_path(root, game_id).exists()