#!/usr/bin/env python3
"""Einstiegspunkt des Habegger Loader Games.

Beispiele::

    ./run.sh                              # Fenster, letzter Spielername
    ./run.sh --fullscreen                 # Vollbild (Messe-/Eventbetrieb)
    ./run.sh --name "Anna"                # Name direkt setzen
    ./run.sh --smoke 10                   # Selbsttest ohne Eingabegeräte
"""

from __future__ import annotations

import argparse
import random
import sys

import pygame

from loader_game import config, storage
from loader_game.assets import Assets
from loader_game.game import Game, State
from loader_game.input_map import Action, actions_from_event, controller_hint_lines
from loader_game.intro import Intro
from loader_game.sequences import load_sequences


def parse_args(argv: list[str] | None = None) -> argparse.Namespace:
    parser = argparse.ArgumentParser(description="Habegger Loader Game")
    parser.add_argument(
        "--fullscreen",
        action="store_true",
        help="Vollbild starten (Standard: Fenster; F11 schaltet jederzeit um)",
    )
    parser.add_argument(
        "--name",
        default=None,
        help="Spielername (sonst der zuletzt gespeicherte aus runtime/)",
    )
    parser.add_argument(
        "--seed",
        type=int,
        default=None,
        help="Zufalls-Seed für reproduzierbare Koffer-Sequenzen",
    )
    parser.add_argument(
        "--smoke",
        type=float,
        default=None,
        metavar="SEKUNDEN",
        help="Selbsttest: bestätigt das Intro automatisch, spielt ohne Eingaben "
        "und beendet sich nach N Sekunden",
    )
    return parser.parse_args(argv)


def create_screen(fullscreen: bool) -> pygame.Surface:
    """Fenster mit virtueller 1920x1080-Auflösung anlegen.

    ``pygame.SCALED`` sorgt dafür, dass alles automatisch auf die tatsächliche
    Fenster-/Bildschirmgrösse skaliert wird (Retina, 1440x900, 4K …).
    """
    flags = pygame.SCALED | (pygame.FULLSCREEN if fullscreen else pygame.RESIZABLE)
    size = (config.SCREEN_WIDTH, config.SCREEN_HEIGHT)
    try:
        return pygame.display.set_mode(size, flags, vsync=1)
    except pygame.error:
        return pygame.display.set_mode(size, flags)


def _demo_action(game: Game, rng: random.Random) -> Action | None:
    """Einfache Auto-Strategie für den Selbsttest."""
    case = game.current
    if case is None or game.animation is not None or not case.allow_snap:
        return None
    return rng.choice([Action.PRIMARY, Action.PRIMARY, Action.PRIMARY, Action.UP, Action.LEFT])


def main(argv: list[str] | None = None) -> int:
    args = parse_args(argv)

    pygame.mixer.pre_init(config.AUDIO_SAMPLE_RATE, -16, 2, 512)
    pygame.init()
    if not pygame.display.get_init():
        print("Kein Display verfügbar (ohne Bildschirm gestartet?).", file=sys.stderr)
        return 1

    pygame.display.set_caption(config.WINDOW_TITLE)
    screen = create_screen(fullscreen=args.fullscreen)

    assets = Assets()
    assets.load()

    for line in controller_hint_lines():
        print(line)

    sequences, warnings = load_sequences()
    for warning in warnings:
        print("Sequenz-Warnung:", warning, file=sys.stderr)

    name = (args.name or storage.load_last_player() or config.DEFAULT_PLAYER_NAME).strip()
    name = name[: config.MAX_PLAYER_NAME_LENGTH] or config.DEFAULT_PLAYER_NAME
    storage.save_last_player(name)

    rng = random.Random(args.seed)
    intro: Intro | None = Intro(assets)
    game: Game | None = None
    clock = pygame.time.Clock()

    running = True
    smoke_remaining = args.smoke
    smoke_timer = 0.0

    while running:
        dt = min(clock.tick(config.FPS) / 1000.0, 0.1)

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False
                break
            if event.type == pygame.KEYDOWN and event.key == pygame.K_F11:
                pygame.display.toggle_fullscreen()
                continue
            for action in actions_from_event(event):
                if intro is not None:
                    intro.handle(action)
                    if action is Action.BACK:
                        running = False
                elif game is not None:
                    running = game.handle(action)
        if not running:
            break

        if intro is not None:
            if intro.update(dt):
                intro = None
                game = Game(assets, sequences, name=name, rng=rng)
            elif smoke_remaining is not None and intro.phase == "instruction":
                intro.handle(Action.PRIMARY)
        elif game is not None:
            game.update(dt)

        if smoke_remaining is not None:
            smoke_remaining -= dt
            if smoke_remaining <= 0:
                running = False
            elif game is not None and intro is None:
                smoke_timer -= dt
                if smoke_timer <= 0:
                    smoke_timer = 0.25
                    action = _demo_action(game, rng)
                    if action is not None:
                        running = game.handle(action)

        if intro is not None:
            intro.draw(screen)
        elif game is not None:
            game.draw(screen)
        pygame.display.flip()

    if game is not None:
        percent = game.percent if game.state is State.GAME_OVER else game.trailer.load_percent()
        print(
            f"Spiel beendet: Zustand={game.state.value}, "
            f"Beladung={percent:.0f}%, Koffer im Auflieger={len(game.trailer.stack)}"
        )

    pygame.quit()
    return 0


if __name__ == "__main__":
    sys.exit(main())