# steamgriddb.py
#
# Copyright 2022-2023 kramo
# Copyright 2023 Geoffrey Coulaud
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# SPDX-License-Identifier: GPL-3.0-or-later

import logging
from pathlib import Path

import requests
from gi.repository import Gio
from requests.exceptions import HTTPError

from src import shared
from src.utils.save_cover import resize_cover, save_cover


class SGDBError(Exception):
    pass


class SGDBAuthError(SGDBError):
    pass


class SGDBGameNotFoundError(SGDBError):
    pass


class SGDBBadRequestError(SGDBError):
    pass


class SGDBNoImageFoundError(SGDBError):
    pass


class SGDBHelper:
    """Helper class to make queries to SteamGridDB"""

    base_url = "https://www.steamgriddb.com/api/v2/"

    @property
    def auth_headers(self):
        key = shared.schema.get_string("sgdb-key")
        headers = {"Authorization": f"Bearer {key}"}
        return headers

    def get_game_id(self, game):
        """Get grid results for a game. Can raise an exception."""
        uri = f"{self.base_url}search/autocomplete/{game.name}"
        res = requests.get(uri, headers=self.auth_headers, timeout=5)
        match res.status_code:
            case 200:
                return res.json()["data"][0]["id"]
            case 401:
                raise SGDBAuthError(res.json()["errors"][0])
            case 404:
                raise SGDBGameNotFoundError(res.status_code)
            case _:
                res.raise_for_status()

    def get_image_uri(self, game_id, animated=False):
        """Get the image for a SGDB game id"""
        uri = f"{self.base_url}grids/game/{game_id}?dimensions=600x900"
        if animated:
            uri += "&types=animated"
        res = requests.get(uri, headers=self.auth_headers, timeout=5)
        match res.status_code:
            case 200:
                data = res.json()["data"]
                if len(data) == 0:
                    raise SGDBNoImageFoundError()
                return data[0]["url"]
            case 401:
                raise SGDBAuthError(res.json()["errors"][0])
            case 404:
                raise SGDBGameNotFoundError(res.status_code)
            case _:
                res.raise_for_status()

    def conditionaly_update_cover(self, game):
        """Update the game's cover if appropriate"""

        # Obvious skips
        use_sgdb = shared.schema.get_boolean("sgdb")
        if not use_sgdb or game.blacklisted:
            return

        image_trunk = shared.covers_dir / game.game_id
        still = image_trunk.with_suffix(".tiff")
        uri_kwargs = image_trunk.with_suffix(".gif")
        prefer_sgdb = shared.schema.get_boolean("sgdb-prefer")

        # Do nothing if file present and not prefer SGDB
        if not prefer_sgdb and (still.is_file() or uri_kwargs.is_file()):
            return

        # Get ID for the game
        try:
            sgdb_id = self.get_game_id(game)
        except (HTTPError, SGDBError) as error:
            logging.warning(
                "%s while getting SGDB ID for %s", type(error).__name__, game.name
            )
            raise error

        # Build different SGDB options to try
        image_uri_kwargs_sets = [{"animated": False}]
        if shared.schema.get_boolean("sgdb-animated"):
            image_uri_kwargs_sets.insert(0, {"animated": True})

        # Download covers
        for uri_kwargs in image_uri_kwargs_sets:
            try:
                uri = self.get_image_uri(sgdb_id, **uri_kwargs)
                response = requests.get(uri, timeout=5)
                tmp_file = Gio.File.new_tmp()[0]
                tmp_file_path = tmp_file.get_path()
                Path(tmp_file_path).write_bytes(response.content)
                save_cover(game.game_id, resize_cover(tmp_file_path))
            except SGDBAuthError as error:
                # Let caller handle auth errors
                raise error
            except (HTTPError, SGDBError) as error:
                logging.warning(
                    "%s while getting image for %s kwargs=%s",
                    type(error).__name__,
                    game.name,
                    str(uri_kwargs),
                )
                continue
            else:
                # Stop as soon as one is finished
                return

        # No image was added
        logging.warning(
            'No matching image found for game "%s" (SGDB ID %d)',
            game.name,
            sgdb_id,
        )
        raise SGDBNoImageFoundError()