"""Main application entry point for BoxedMan: supports both GUI and CLI/Headless modes."""

import sys
import argparse

from src.config import Settings, CalibrationData
from src.gui import run_gui


def main():
    parser = argparse.ArgumentParser(description="BoxedMan - Interactive Projector Installation")
    parser.add_argument("--cam", type=int, default=None, help="Camera index override (e.g. 0, 1, 2)")
    parser.add_argument("--fullscreen", action="store_true", help="Launch in fullscreen mode on projector")
    parser.add_argument("--sim", action="store_true", help="Simulation mode without webcam (draw obstacles with mouse)")
    parser.add_argument("--no-gui", action="store_true", help="Run without control panel GUI (direct Pygame window)")
    args = parser.parse_args()

    settings = Settings.load()
    if args.cam is not None:
        settings.camera_index = args.cam
    if args.fullscreen:
        settings.fullscreen = True

    calibration = CalibrationData.load()

    # Launch cross-platform PySide6 GUI by default
    if not args.no_gui:
        run_gui(settings, calibration, sim_mode=args.sim)
    else:
        # Fallback headless / direct Pygame loop
        import pygame
        from src.engine import SimulationEngine

        pygame.init()
        flags = pygame.FULLSCREEN if settings.fullscreen else 0
        screen = pygame.display.set_mode((settings.projector_width, settings.projector_height), flags)
        pygame.display.set_caption("BoxedMan")
        clock = pygame.time.Clock()

        engine = SimulationEngine(settings, calibration, sim_mode=args.sim)
        running = True

        while running:
            dt = clock.tick(settings.fps) / 1000.0
            for event in pygame.event.get():
                if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE):
                    running = False
                elif event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_b:
                        engine.capture_background()
                    elif event.key == pygame.K_r:
                        engine.reset_pegman()

            engine.step(dt)
            engine.render(screen)
            pygame.display.flip()

        engine.close()
        pygame.quit()
        sys.exit(0)


if __name__ == "__main__":
    main()