# itch_importer.py
#
# Copyright 2022-2023 kramo
#
# 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 os
from pathlib import Path
from shutil import copyfile
from sqlite3 import connect
from time import time

import requests
from gi.repository import GdkPixbuf, Gio

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


def get_game(task, current_time, row):
    values = {}

    values["game_id"] = f"itch_{row[0]}"

    if (
        values["game_id"] in shared.win.games
        and not shared.win.games[values["game_id"]].removed
    ):
        task.return_value((None, None))
        return

    values["added"] = current_time
    values["executable"] = (
        ["start", f"itch://caves/{row[4]}/launch"]
        if os.name == "nt"
        else ["xdg-open", f"itch://caves/{row[4]}/launch"]
    )
    values["hidden"] = False
    values["name"] = row[1]
    values["source"] = "itch"

    if row[3] or row[2]:
        tmp_file = Gio.File.new_tmp()[0]
        try:
            with requests.get(row[3] or row[2], timeout=5) as cover:
                cover.raise_for_status()
                Path(tmp_file.get_path()).write_bytes(cover.content)
        except requests.exceptions.RequestException:
            task.return_value((values, None))
            return

        game_cover = GdkPixbuf.Pixbuf.new_from_stream_at_scale(
            tmp_file.read(), 2, 2, False
        ).scale_simple(*shared.image_size, GdkPixbuf.InterpType.BILINEAR)

        itch_pixbuf = GdkPixbuf.Pixbuf.new_from_stream(tmp_file.read())
        itch_pixbuf = itch_pixbuf.scale_simple(
            shared.image_size[0],
            itch_pixbuf.get_height() * (shared.image_size[0] / itch_pixbuf.get_width()),
            GdkPixbuf.InterpType.BILINEAR,
        )
        itch_pixbuf.composite(
            game_cover,
            0,
            (shared.image_size[1] - itch_pixbuf.get_height()) / 2,
            itch_pixbuf.get_width(),
            itch_pixbuf.get_height(),
            0,
            (shared.image_size[1] - itch_pixbuf.get_height()) / 2,
            1.0,
            1.0,
            GdkPixbuf.InterpType.BILINEAR,
            255,
        )

    else:
        game_cover = None

    task.return_value((values, game_cover))


def get_games_async(rows, importer):
    current_time = int(time())

    # Wrap the function in another one as Gio.Task.run_in_thread does not allow for passing args
    def create_func(current_time, row):
        def wrapper(task, *_args):
            get_game(
                task,
                current_time,
                row,
            )

        return wrapper

    def update_games(_task, result):
        final_values = result.propagate_value()[1]
        # No need for an if statement as final_value would be None for games we don't want to save
        importer.save_game(
            final_values[0],
            resize_cover(pixbuf=final_values[1]),
        )

    for row in rows:
        task = Gio.Task.new(None, None, update_games)
        task.run_in_thread(create_func(current_time, row))


def itch_installed(path=None):
    location_key = "itch-location"
    itch_dir = (
        path if path else Path(shared.schema.get_string(location_key)).expanduser()
    )
    check = Path("db") / "butler.db"

    if not (itch_dir / check).is_file():
        locations = (
            (Path(),)
            if path
            else (
                Path.home() / ".var/app/io.itch.itch/config/itch",
                shared.config_dir / "itch",
            )
        )

        if os.name == "nt" and not path:
            locations += (Path(os.getenv("appdata")) / "itch",)

        itch_dir = check_install(check, locations, (shared.schema, location_key))

    return itch_dir


def itch_importer():
    itch_dir = itch_installed()
    if not itch_dir:
        return

    database_path = (itch_dir / "db").expanduser()

    db_cache_dir = shared.cache_dir / "cartridges" / "itch"
    db_cache_dir.mkdir(parents=True, exist_ok=True)

    # Copy the file because sqlite3 doesn't like databases in /run/user/
    database_tmp_path = db_cache_dir / "butler.db"

    for db_file in database_path.glob("butler.db*"):
        copyfile(db_file, (db_cache_dir / db_file.name))

    db_request = """
                SELECT
                    games.id,
                    games.title,
                    games.cover_url,
                    games.still_cover_url,
                    caves.id
                FROM
                    'caves'
                INNER JOIN
                    'games'
                ON
                    caves.game_id = games.id
                ;
                """

    connection = connect(database_tmp_path)
    cursor = connection.execute(db_request)
    rows = cursor.fetchall()
    connection.close()
    # No need to unlink temp files as they disappear when the connection is closed
    database_tmp_path.unlink(missing_ok=True)

    importer = shared.importer
    importer.total_queue += len(rows)
    importer.queue += len(rows)

    get_games_async(rows, importer)