import argparse
import logging
import os
import sys
from datetime import datetime
from pathlib import Path
from typing import Optional

from dcs.payloads import PayloadDirectories
from PySide2 import QtWidgets
from PySide2.QtGui import QPixmap
from PySide2.QtWidgets import QApplication, QSplashScreen
from dcs.weapons_data import weapon_ids

from game import Game, VERSION, persistency
from game.data.weapons import (
    WEAPON_FALLBACK_MAP,
    WEAPON_INTRODUCTION_YEARS,
    Weapon,
)
from game.profiling import logged_duration
from game.settings import Settings
from game.theater.start_generator import GameGenerator, GeneratorSettings
from qt_ui import (
    liberation_install,
    liberation_theme,
    logging_config,
    uiconstants,
)
from qt_ui.windows.GameUpdateSignal import GameUpdateSignal
from qt_ui.windows.QLiberationWindow import QLiberationWindow
from qt_ui.windows.newgame.QCampaignList import Campaign
from qt_ui.windows.newgame.QNewGameWizard import DEFAULT_BUDGET
from qt_ui.windows.preferences.QLiberationFirstStartWindow import (
    QLiberationFirstStartWindow,
)


THIS_DIR = Path(__file__).parent


def inject_custom_payloads() -> None:
    dev_payloads = THIS_DIR.parent / "resources/customized_payloads"
    # The packaged release rearranges the file locations, so the release has the
    # customized payloads in a different location.
    release_payloads = THIS_DIR / "resources/customized_payloads"
    if dev_payloads.exists():
        payloads = dev_payloads
    elif release_payloads.exists():
        payloads = release_payloads
    else:
        raise RuntimeError(
            f"Could not find customized payloads at {release_payloads} or "
            f"{dev_payloads}. Aircraft will have no payloads."
        )
    # We configure these as fallbacks so that the user's payloads override ours.
    PayloadDirectories.set_fallback(payloads)


def run_ui(game: Optional[Game], new_map: bool) -> None:
    os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"  # Potential fix for 4K screens
    app = QApplication(sys.argv)

    # init the theme and load the stylesheet based on the theme index
    liberation_theme.init()
    with open(
        "./resources/stylesheets/" + liberation_theme.get_theme_css_file()
    ) as stylesheet:
        logging.info("Loading stylesheet: %s", liberation_theme.get_theme_css_file())
        app.setStyleSheet(stylesheet.read())

    inject_custom_payloads()

    first_start = liberation_install.init()
    if first_start:
        window = QLiberationFirstStartWindow()
        window.exec_()

    logging.info("Using {} as 'Saved Game Folder'".format(persistency.base_path()))
    logging.info(
        "Using {} as 'DCS installation folder'".format(
            liberation_install.get_dcs_install_directory()
        )
    )

    # Splash screen setup
    pixmap = QPixmap("./resources/ui/splash_screen.png")
    splash = QSplashScreen(pixmap)
    splash.show()

    # Once splash screen is up : load resources & setup stuff
    uiconstants.load_icons()
    uiconstants.load_event_icons()
    uiconstants.load_aircraft_icons()
    uiconstants.load_vehicle_icons()
    uiconstants.load_aircraft_banners()
    uiconstants.load_vehicle_banners()

    # Replace DCS Mission scripting file to allow DCS Liberation to work
    try:
        liberation_install.replace_mission_scripting_file()
    except:
        error_dialog = QtWidgets.QErrorMessage()
        error_dialog.setWindowTitle("Wrong DCS installation directory.")
        error_dialog.showMessage(
            "Unable to modify Mission Scripting file. Possible issues with rights. Try running as admin, or please perform the modification of the MissionScripting file manually."
        )
        error_dialog.exec_()

    # Apply CSS (need works)
    GameUpdateSignal()

    # Start window
    window = QLiberationWindow(game, new_map)
    window.showMaximized()
    splash.finish(window)
    qt_execution_code = app.exec_()

    # Restore Mission Scripting file
    logging.info("QT App terminated with status code : " + str(qt_execution_code))
    logging.info("Attempt to restore original mission scripting file")
    liberation_install.restore_original_mission_scripting()
    logging.info("QT process exited with code : " + str(qt_execution_code))


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    subparsers = parser.add_subparsers(dest="subcommand")

    def path_arg(arg: str) -> Path:
        path = Path(arg)
        if not path.exists():
            raise argparse.ArgumentTypeError("path does not exist")
        return path

    parser.add_argument(
        "--warn-missing-weapon-data",
        action="store_true",
        help="Emits a warning for weapons without date or fallback information.",
    )

    parser.add_argument(
        "--new-map",
        action="store_true",
        default=True,
        help="Use the new map. Functional but missing many display options.",
    )

    parser.add_argument(
        "--old-map", dest="new_map", action="store_false", help="Use the old map."
    )

    new_game = subparsers.add_parser("new-game")

    new_game.add_argument(
        "campaign", type=path_arg, help="Path to the campaign to start."
    )

    new_game.add_argument(
        "--blue", default="USA 2005", help="Name of the blue faction."
    )

    new_game.add_argument(
        "--red", default="Russia 1990", help="Name of the red faction."
    )

    new_game.add_argument(
        "--supercarrier", action="store_true", help="Use the supercarrier module."
    )

    new_game.add_argument(
        "--auto-procurement", action="store_true", help="Automate bluefor procurement."
    )

    new_game.add_argument(
        "--inverted", action="store_true", help="Invert the campaign."
    )

    new_game.add_argument("--cheats", action="store_true", help="Enable cheats.")

    return parser.parse_args()


def create_game(
    campaign_path: Path,
    blue: str,
    red: str,
    supercarrier: bool,
    auto_procurement: bool,
    inverted: bool,
    cheats: bool,
) -> Game:
    first_start = liberation_install.init()
    if first_start:
        sys.exit(
            "Cannot generate campaign without configuring DCS Liberation. Start the UI "
            "for the first run configuration."
        )
    campaign = Campaign.from_json(campaign_path)
    generator = GameGenerator(
        blue,
        red,
        campaign.load_theater(),
        Settings(
            supercarrier=supercarrier,
            automate_runway_repair=auto_procurement,
            automate_front_line_reinforcements=auto_procurement,
            automate_aircraft_reinforcements=auto_procurement,
            enable_frontline_cheats=cheats,
            enable_base_capture_cheat=cheats,
        ),
        GeneratorSettings(
            start_date=datetime.today(),
            player_budget=DEFAULT_BUDGET,
            enemy_budget=DEFAULT_BUDGET,
            midgame=False,
            inverted=inverted,
            no_carrier=False,
            no_lha=False,
            no_player_navy=False,
            no_enemy_navy=False,
        ),
    )
    return generator.generate()


def lint_weapon_data() -> None:
    for clsid in weapon_ids:
        weapon = Weapon.from_clsid(clsid)
        if weapon not in WEAPON_INTRODUCTION_YEARS:
            logging.warning(f"{weapon} has no introduction date")
        if weapon not in WEAPON_FALLBACK_MAP:
            logging.warning(f"{weapon} has no fallback")


def main():
    logging_config.init_logging(VERSION)

    logging.debug("Python version %s", sys.version)

    game: Optional[Game] = None

    args = parse_args()

    # TODO: Flesh out data and then make unconditional.
    if args.warn_missing_weapon_data:
        lint_weapon_data()

    if args.subcommand == "new-game":
        with logged_duration("New game creation"):
            game = create_game(
                args.campaign,
                args.blue,
                args.red,
                args.supercarrier,
                args.auto_procurement,
                args.inverted,
                args.cheats,
            )

    run_ui(game, args.new_map)


if __name__ == "__main__":
    main()