"""Carga de games.toml → objetos Game con valores derivados."""

from __future__ import annotations

import tomllib
from dataclasses import dataclass, field
from pathlib import Path
from urllib.parse import urlparse

DEFAULT_VERSION_CMD = "git describe --tags --always"
DEFAULT_ICON_REL = "release/icons/icon.png"


@dataclass
class Game:
    id: str
    name: str
    clone_url: str
    run_cmd: str
    build_cmd: str = ""
    version_cmd: str = DEFAULT_VERSION_CMD
    info_url: str = ""
    icon_rel: str = DEFAULT_ICON_REL

    def __post_init__(self) -> None:
        if not self.info_url:
            self.info_url = derive_info_url(self.clone_url)


@dataclass
class Config:
    data_dir: str = "jlauncher_data"
    games: list[Game] = field(default_factory=list)


def derive_info_url(clone_url: str) -> str:
    """De una URL de clone Gitea deriva la URL de la API REST del repo.

    https://host/org/repo.git  ->  https://host/api/v1/repos/org/repo
    """
    parsed = urlparse(clone_url)
    path = parsed.path.strip("/")
    if path.endswith(".git"):
        path = path[: -len(".git")]
    parts = [p for p in path.split("/") if p]
    if len(parts) < 2 or not parsed.scheme or not parsed.netloc:
        return ""
    owner, repo = parts[-2], parts[-1]
    return f"{parsed.scheme}://{parsed.netloc}/api/v1/repos/{owner}/{repo}"


def load_config(path: Path) -> Config:
    with open(path, "rb") as fh:
        raw = tomllib.load(fh)

    games: list[Game] = []
    for entry in raw.get("game", []):
        missing = [k for k in ("id", "name", "clone_url", "run_cmd") if not entry.get(k)]
        if missing:
            raise ValueError(
                f"Juego con campos obligatorios faltantes {missing}: {entry!r}"
            )
        games.append(
            Game(
                id=entry["id"],
                name=entry["name"],
                clone_url=entry["clone_url"],
                run_cmd=entry["run_cmd"],
                build_cmd=entry.get("build_cmd", ""),
                version_cmd=entry.get("version_cmd") or DEFAULT_VERSION_CMD,
                info_url=entry.get("info_url", ""),
                icon_rel=entry.get("icon_rel") or DEFAULT_ICON_REL,
            )
        )

    if not games:
        raise ValueError("games.toml no define ningún [[game]]")

    return Config(data_dir=raw.get("data_dir", "jlauncher_data"), games=games)