# steam_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
import re
from pathlib import Path
from time import time

import requests
from gi.repository import Gio

from . import shared
from .check_install import check_install


def update_values_from_data(content, values):
    basic_data = content[values["appid"]]
    if not basic_data["success"]:
        values["blacklisted"] = True
    else:
        data = basic_data["data"]
        if data.get("developers"):
            values["developer"] = ", ".join(data["developers"])

        if data.get("type") not in {"game", "demo"}:
            values["blacklisted"] = True

    return values


def get_game(task, datatypes, current_time, appmanifest, steam_dir):
    values = {}

    data = appmanifest.read_text("utf-8")
    for datatype in datatypes:
        value = re.findall(f'"{datatype}"\t\t"(.*)"\n', data, re.IGNORECASE)
        try:
            values[datatype] = value[0]
        except IndexError:
            task.return_value((None, None))
            return

    values["game_id"] = f'steam_{values["appid"]}'

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

    values["executable"] = (
        ["start", f'steam://rungameid/{values["appid"]}']
        if os.name == "nt"
        else ["xdg-open", f'steam://rungameid/{values["appid"]}']
    )
    values["hidden"] = False
    values["source"] = "steam"
    values["added"] = current_time
    values["last_played"] = 0

    image_path = (
        steam_dir
        / "appcache"
        / "librarycache"
        / f'{values["appid"]}_library_600x900.jpg'
    )

    try:
        with requests.get(
            f'https://store.steampowered.com/api/appdetails?appids={values["appid"]}',
            timeout=5,
        ) as open_file:
            open_file.raise_for_status()
            content = open_file.json()
    except requests.exceptions.RequestException:
        task.return_value((values, image_path if image_path.is_file() else None))
        return

    values = update_values_from_data(content, values)
    task.return_value((values, image_path if image_path.is_file() else None))


def get_games_async(appmanifests, steam_dir, importer):
    datatypes = ["appid", "name"]
    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(datatypes, current_time, appmanifest, steam_dir):
        def wrapper(task, *_args):
            get_game(
                task,
                datatypes,
                current_time,
                appmanifest,
                steam_dir,
            )

        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], final_values[1])

    for appmanifest in appmanifests:
        task = Gio.Task.new(None, None, update_games)
        task.run_in_thread(create_func(datatypes, current_time, appmanifest, steam_dir))


def steam_installed(path=None):
    location_key = "steam-location"
    check = "steamapps"

    subdirs = ("steam", "Steam")
    locations = (
        (path,)
        if path
        else (
            Path(shared.schema.get_string(location_key)).expanduser(),
            Path.home() / ".steam",
            shared.data_dir / "Steam",
            Path.home() / ".var/app/com.valvesoftware.Steam/data/Steam",
        )
    )

    if os.name == "nt":
        locations += (Path(os.getenv("programfiles(x86)")) / "Steam",)

    steam_dir = check_install(check, locations, (shared.schema, location_key), subdirs)

    return steam_dir


def steam_importer():
    steam_dir = steam_installed()
    if not steam_dir:
        return

    appmanifests = []

    if (lib_file := steam_dir / "steamapps" / "libraryfolders.vdf").is_file():
        libraryfolders = lib_file.open().read()
        steam_dirs = [
            Path(path) for path in re.findall('"path"\t\t"(.*)"\n', libraryfolders)
        ]
    else:
        steam_dirs = [steam_dir]

    for directory in steam_dirs:
        try:
            for open_file in (directory / "steamapps").iterdir():
                if open_file.is_file() and "appmanifest" in open_file.name:
                    appmanifests.append(open_file)
        except FileNotFoundError:
            continue

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

    get_games_async(appmanifests, steam_dir, importer)