"""Drives the real MainWindow's clap-detection buttons (not a copy of the
logic) against the synthetic fixture with a known beep at t=5.350s, then
simulates a real mouse click on the MarkerStrip widget to confirm
click-to-seek actually moves the player -- not just that a signal exists.
"""
import sys
import time
from pathlib import Path

from PyQt6.QtCore import Qt, QPointF
from PyQt6.QtGui import QMouseEvent
from PyQt6.QtWidgets import QApplication

sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
import main as app_main

ROOT = Path(__file__).resolve().parent.parent
CLIP = str(ROOT / "test_media" / "sync_test_OUTOFSYNC_audio+350ms.mp4")
OUT_DIR = ROOT / "test_media" / "seek_validation"


def wait_for(predicate, qapp, timeout=20):
    deadline = time.time() + timeout
    while not predicate() and time.time() < deadline:
        qapp.processEvents()
        time.sleep(0.05)
    return predicate()


def main():
    OUT_DIR.mkdir(exist_ok=True)
    qapp = QApplication(sys.argv)
    win = app_main.MainWindow()
    win.show()
    qapp.processEvents()

    win._load(CLIP)
    qapp.processEvents()
    time.sleep(0.3)
    qapp.processEvents()

    assert win.detect_all_action.isEnabled()
    win.detect_all_action.trigger()
    qapp.processEvents()
    assert not win.detect_all_action.isEnabled(), "action should disable while detection runs"

    ok = wait_for(lambda: win.detect_all_action.isEnabled(), qapp)
    assert ok, "detection did not finish in time"

    markers = win.source_panel.marker_strip.markers()
    print(f"detected markers: {markers}")
    assert len(markers) >= 1, "expected at least one clap marker"
    # ground truth beep is at t=5.350s in this fixture; onset detection has
    # some inherent lag, so allow a generous window rather than exact match.
    assert any(abs(m - 5.350) < 0.5 for m in markers), f"no marker near the known beep: {markers}"

    win.grab().save(str(OUT_DIR / "clap_markers_on_timeline.png"))

    # Simulate a real mouse click on the marker to prove click-to-seek works
    # end to end, not just that the signal is wired.
    target_time = min(markers, key=lambda m: abs(m - 5.350))
    strip = win.source_panel.marker_strip
    strip.resize(win.source_panel.seek_slider.width(), strip.height())
    x = strip._x_for_time(target_time)
    click_pos = QPointF(x, 5)

    before_pos = win.source_panel.player.get_position()
    event = QMouseEvent(
        QMouseEvent.Type.MouseButtonPress, click_pos, click_pos,
        Qt.MouseButton.LeftButton, Qt.MouseButton.LeftButton, Qt.KeyboardModifier.NoModifier,
    )
    strip.mousePressEvent(event)
    qapp.processEvents()
    time.sleep(0.2)
    qapp.processEvents()

    after_pos = win.source_panel.player.get_position()
    print(f"clicked marker at x={x:.1f} (t={target_time:.3f}s); player position before={before_pos:.3f}s after={after_pos:.3f}s")
    assert abs(after_pos - target_time) < 0.1, "clicking the marker should seek the player to that timestamp"

    win.source_panel.shutdown()
    win.preview_panel.shutdown()
    print("\nCLAP DETECTION SMOKE TEST PASSED")


if __name__ == "__main__":
    main()