import json
import os
from gettext import gettext as _

from PIL import Image

from lutris import settings
from lutris.services.base import BaseService
from lutris.services.service_game import ServiceGame
from lutris.services.service_media import ServiceMedia
from lutris.util import system
from lutris.util.dolphin.cache_reader import DOLPHIN_GAME_CACHE_FILE, DolphinCacheReader
from lutris.util.strings import slugify


class DolphinBanner(ServiceMedia):
    service = "dolphin"
    source = "local"
    size = (96, 32)
    file_pattern = "%s.png"
    file_format = "jpeg"
    dest_path = os.path.join(settings.CACHE_DIR, "dolphin/banners/small")


class DolphinService(BaseService):
    id = "dolphin"
    icon = "dolphin"
    name = _("Dolphin")
    local = True
    medias = {
        "icon": DolphinBanner
    }

    def load(self):
        if not system.path_exists(DOLPHIN_GAME_CACHE_FILE):
            return
        cache_reader = DolphinCacheReader()
        dolphin_games = [DolphinGame.new_from_cache(game) for game in cache_reader.get_games()]
        for game in dolphin_games:
            game.save()
        return dolphin_games

    def generate_installer(self, db_game):
        details = json.loads(db_game["details"])
        return {
            "name": db_game["name"],
            "version": "Dolphin",
            "slug": db_game["slug"],
            "game_slug": slugify(db_game["name"]),
            "runner": "dolphin",
            "script": {
                "game": {
                    "main_file": details["path"],
                    "platform": details["platform"]
                },
            }
        }

    def get_game_directory(self, installer):
        """Pull install location from installer"""
        return os.path.dirname(installer["script"]["game"]["main_file"])


class DolphinGame(ServiceGame):
    """Game for the Dolphin emulator"""

    service = "dolphin"
    runner = "dolphin"
    installer_slug = "dolphin"

    @classmethod
    def new_from_cache(cls, cache_entry):
        """Create a service game from an entry from the Dolphin cache"""
        service_game = cls()
        service_game.name = cache_entry["internal_name"]
        service_game.appid = str(cache_entry["game_id"])
        service_game.slug = slugify(cache_entry["internal_name"])
        service_game.icon = service_game.get_banner(cache_entry)

        service_game.details = json.dumps({
            "path": cache_entry["file_path"],
            "platform": cache_entry["platform"][:-1]
        })
        return service_game

    @staticmethod
    def get_game_name(cache_entry):
        names = cache_entry["long_names"]
        name_index = 1 if len(names.keys()) > 1 else 0
        return str(names[list(names.keys())[name_index]])

    def get_banner(self, cache_entry):
        banner = DolphinBanner()
        banner_path = banner.get_absolute_path(self.appid)

        if os.path.exists(banner_path):
            return banner_path

        (width, height), data = cache_entry["volume_banner"]
        if data:
            img = Image.frombytes("RGB", (width, height), data, "raw", ("BGRX"))
            # 96x32 is a bit small, maybe 2x scale?
            # img.resize((width * 2, height * 2))
            img.save(banner_path)
            return banner_path

        return ""
