import yaml

from .gameconfig import config


class GameDB:

    def __init__(self):
        database_path = config.get_games_database_path()
        with open(database_path, 'rb') as fdin:
            self.db = yaml.safe_load(fdin)
        self.last_game_info = None

    def get_game_info(self, game_id=None):
        if self.last_game_info and self.last_game_info['id'] == game_id:
            return self.last_game_info
        game_info = next(game_info
                         for game_info in self.db['games']
                         if game_info['id'] == game_id)
        self.last_game_info = game_info
        return game_info

    def get_game_env(self, profile_id, game_id=None):
        # TODO
        raise Error

    def get_game_command(self, profile_id, game_id=None):
        game_info = self.get_game_info(game_id)
        game_mods = game_info.get('mods', [])
        #game_mods += ['locked-run-profiledir']
        #game_dir = config.get_games_install_basedir() / game_info['id']
        ## note: glob('*/') globs regular files too, thus I filter on is_dir.
        #game_dir = list(item
        #                for item in game_dir.glob('*') if item.is_dir())[-1]
        tools_bin_path = config.get_games_saves_tools_bin_path()
        #profile_dir = config.get_profile_dir(profile_id)
        command_from_game_info = [
            f'{tools_bin_path}/runners/{game_info["command"][0]}',
            *game_info['command'][1:],
        ] if game_info.get('command') else [
            f'{tools_bin_path}/runners/run-{game_info["id"]}',
        ]
        command = [
            # mods
            *[f'{tools_bin_path}/mod-{item}' for item in game_mods],
            # runner
            *command_from_game_info,
        ]
        return command

    def get_ids(self):
        for game_info in self.db['games']:
            yield game_info['id']

    def get_idtitles(self):
        for game_info in self.db['games']:
            yield game_info['id'], game_info['title']

    def get_info(self, game_id):
        return next(game_info for game_info in self.db['games']
                    if game_info['id'] == game_id)