from __future__ import annotations

import json
import importlib.util
import sys
from dataclasses import dataclass, field, asdict
from pathlib import Path
from typing import Any

from utils.logger import get_logger

logger = get_logger(__name__)

GAMES_DIR = Path(__file__).resolve().parent.parent / "games"
BUILTIN_DIR = GAMES_DIR / "builtin"
USER_DIR = GAMES_DIR / "user"


@dataclass
class GamePlugin:
    id: str = ""
    name: str = ""
    parser_type: str = "forza"
    telemetry_format: str = ""
    description: str = ""
    author: str = ""
    version: str = "1.0.0"
    default_port: int = 20777
    icon: str = ""
    is_builtin: bool = True
    enabled: bool = True
    manifest_path: str = ""

    def to_dict(self) -> dict[str, Any]:
        return asdict(self)

    @classmethod
    def from_manifest(cls, path: Path, is_builtin: bool = True) -> GamePlugin | None:
        try:
            with open(path, "r", encoding="utf-8") as f:
                data = json.load(f)
            gp = cls(
                id=data.get("id", path.parent.name),
                name=data.get("name", path.parent.name),
                parser_type=data.get("parser_type", "forza"),
                telemetry_format=data.get("telemetry_format", ""),
                description=data.get("description", ""),
                author=data.get("author", ""),
                version=data.get("version", "1.0.0"),
                default_port=data.get("default_port", 20777),
                icon=data.get("icon", ""),
                is_builtin=is_builtin,
                enabled=True,
                manifest_path=str(path.parent),
            )
            return gp
        except Exception as e:
            logger.error("Failed to load game plugin manifest %s: %s", path, e)
            return None


class GamePluginManager:
    def __init__(self):
        BUILTIN_DIR.mkdir(parents=True, exist_ok=True)
        USER_DIR.mkdir(parents=True, exist_ok=True)
        self._plugins: dict[str, GamePlugin] = {}
        self._parser_cache: dict[str, Any] = {}
        self._discover()

    def _discover(self):
        self._plugins.clear()

        for d in [BUILTIN_DIR, USER_DIR]:
            if not d.exists():
                continue
            is_builtin = (d == BUILTIN_DIR)
            for item in d.iterdir():
                if item.is_dir():
                    manifest = item / "manifest.json"
                    if manifest.exists():
                        gp = GamePlugin.from_manifest(manifest, is_builtin)
                        if gp:
                            self._plugins[gp.id] = gp
                            logger.debug("Discovered game plugin: %s", gp.id)

    def list_all(self) -> list[dict[str, Any]]:
        self._discover()
        return [p.to_dict() for p in self._plugins.values()]

    def get(self, plugin_id: str) -> GamePlugin | None:
        self._discover()
        return self._plugins.get(plugin_id)

    def get_parser(self, plugin_id: str) -> Any | None:
        self._discover()
        gp = self._plugins.get(plugin_id)
        if not gp:
            return None

        cache_key = gp.id
        if cache_key in self._parser_cache:
            return self._parser_cache[cache_key]

        parser_dir = Path(gp.manifest_path)
        parser_file = parser_dir / "parser.py"
        if not parser_file.exists():
            return None

        try:
            module_name = f"turbosu_game_{gp.id}"
            spec = importlib.util.spec_from_file_location(module_name, parser_file)
            if spec and spec.loader:
                module = importlib.util.module_from_spec(spec)
                sys.modules[module_name] = module
                spec.loader.exec_module(module)
                if hasattr(module, "get_parser"):
                    parser = module.get_parser()
                    self._parser_cache[cache_key] = parser
                    logger.info("Loaded parser for game: %s", gp.name)
                    return parser
        except Exception as e:
            logger.error("Failed to load parser for %s: %s", gp.id, e)

        return None

    def reload(self):
        self._discover()
        self._parser_cache.clear()

    def install_plugin(self, data: dict[str, Any]) -> bool:
        plugin_id = data.get("id", "")
        if not plugin_id:
            return False

        dest_dir = USER_DIR / plugin_id
        dest_dir.mkdir(parents=True, exist_ok=True)

        manifest = data.get("manifest", {})
        with open(dest_dir / "manifest.json", "w", encoding="utf-8") as f:
            json.dump(manifest, f, indent=2, ensure_ascii=False)

        if data.get("parser_code"):
            with open(dest_dir / "parser.py", "w", encoding="utf-8") as f:
                f.write(data["parser_code"])

        self._discover()
        logger.info("Plugin installed: %s", plugin_id)
        return True

    def remove_plugin(self, plugin_id: str) -> bool:
        gp = self._plugins.get(plugin_id)
        if gp and gp.is_builtin:
            logger.warning("Cannot remove builtin plugin: %s", plugin_id)
            return False

        import shutil
        dest_dir = USER_DIR / plugin_id
        if dest_dir.exists():
            shutil.rmtree(dest_dir)
            self._discover()
            logger.info("Plugin removed: %s", plugin_id)
            return True
        return False

    def export_plugin(self, plugin_id: str) -> dict[str, Any] | None:
        gp = self._plugins.get(plugin_id)
        if not gp:
            return None

        parser_dir = Path(gp.manifest_path)
        manifest_file = parser_dir / "manifest.json"
        parser_file = parser_dir / "parser.py"

        result: dict[str, Any] = {
            "type": "game_plugin",
            "version": "1.0",
            "manifest": {},
            "parser_code": "",
        }

        if manifest_file.exists():
            with open(manifest_file, "r", encoding="utf-8") as f:
                result["manifest"] = json.load(f)
        if parser_file.exists():
            with open(parser_file, "r", encoding="utf-8") as f:
                result["parser_code"] = f.read()

        return result


game_plugin_manager = GamePluginManager()