from __future__ import annotations

import sys

from PySide6.QtCore import QTimer
from PySide6.QtMultimedia import QVideoSink
from PySide6.QtWidgets import QApplication

from duck_preview.camera.service import CameraService
from duck_preview.dispatcher.frame_dispatcher import FrameDispatcher
from duck_preview.main_window import MainWindow
from duck_preview.rendering.overlay import OverlayWidget
from duck_preview.rendering.video_widget import VideoWidget
from duck_preview.telemetry.collector import TelemetryCollector


def main() -> None:
    app = QApplication(sys.argv)
    app.setApplicationName("Duck Preview")

    camera = CameraService()
    video_sink = QVideoSink()
    dispatcher = FrameDispatcher()
    telemetry = TelemetryCollector()
    video_widget = VideoWidget()
    overlay = OverlayWidget()

    camera.set_video_widget(video_widget)
    camera.set_video_sink(video_sink)

    video_sink.videoFrameChanged.connect(dispatcher.on_frame)
    dispatcher.subscribe(telemetry.on_frame)

    window = MainWindow(camera, video_widget, overlay)

    camera.error_occurred.connect(lambda msg: overlay.set_metrics({"error": msg}))

    metrics_timer = QTimer()
    metrics_timer.timeout.connect(lambda: overlay.set_metrics(telemetry.metrics()))
    metrics_timer.start(200)

    window.show()
    sys.exit(app.exec())


if __name__ == "__main__":
    main()