#!/opt/homebrew/bin/python3.11
"""
Lip Processor - 嘴部動作檢測
使用 MediaPipe Tasks API (v0.10+)
"""

import sys
import json
import argparse
import os
import signal
import cv2

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
from redis_publisher import RedisPublisher


def signal_handler(signum, frame):
    print(f"LIP: Received signal {signum}, exiting...")
    sys.exit(1)


# 嘴部關鍵點索引
UPPER_LIP_BOTTOM = 78
LOWER_LIP_TOP = 308
LEFT_MOUTH = 61
RIGHT_MOUTH = 291


def process_lip(
    video_path: str, output_path: str, uuid: str = "", sample_interval: int = 30
):
    """Process video for lip movement detection using MediaPipe Tasks API"""

    signal.signal(signal.SIGTERM, signal_handler)
    signal.signal(signal.SIGINT, signal_handler)

    publisher = RedisPublisher(uuid) if uuid else None
    if publisher:
        publisher.info("lip", "LIP_START")

    if publisher:
        publisher.info("lip", "LIP_LOADING_MEDIAPIPE")

    try:
        from mediapipe.tasks import python
        from mediapipe.tasks.python import vision

        # 創建 Face Landmarker
        base_options = python.BaseOptions(
            model_asset_path="face_landmarker.task",
            delegate=python.BaseOptions.Delegate.CPU,
        )

        options = vision.FaceLandmarkerOptions(
            base_options=base_options,
            running_mode=vision.RunningMode.VIDEO,
            num_faces=1,
            min_face_detection_confidence=0.5,
            min_tracking_confidence=0.5,
        )

        detector = vision.FaceLandmarker.create_from_options(options)

    except Exception as e:
        if publisher:
            publisher.error("lip", f"Failed to load MediaPipe: {e}")
        result = {"error": str(e), "frames": []}
        with open(output_path, "w") as f:
            json.dump(result, f, indent=2)
        sys.exit(1)

    if publisher:
        publisher.info("lip", "LIP_OPENING_VIDEO")

    cap = cv2.VideoCapture(video_path)
    fps = cap.get(cv2.CAP_PROP_FPS)
    total_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))

    if publisher:
        publisher.info("lip", f"fps={fps}, frames={total_frames}")
        publisher.progress("lip", 0, total_frames, "Starting")

    frames = []
    frame_count = 0
    processed = 0
    speaking_frames = 0
    total_openness = 0.0
    timestamp_ms = 0

    if publisher:
        publisher.info("lip", f"LIP_PROCESSING (sample={sample_interval})")

    while True:
        ret, frame = cap.read()
        if not ret:
            break

        frame_count += 1
        timestamp_ms = int(((frame_count - 1) / fps) * 1000)

        if frame_count % sample_interval != 0:
            continue

        processed += 1
        timestamp = (frame_count - 1) / fps

        # 轉換為 MediaPipe Image
        rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
        mp_image = vision.Image(image_format=vision.ImageFormat.SRGB, data=rgb)

        # 檢測
        result = detector.detect_for_video(mp_image, timestamp_ms)

        if result.face_landmarks and len(result.face_landmarks) > 0:
            lm = result.face_landmarks[0]

            # 計算嘴部開合度
            openness = abs(lm[UPPER_LIP_BOTTOM].y - lm[LOWER_LIP_TOP].y)
            width = abs(lm[LEFT_MOUTH].x - lm[RIGHT_MOUTH].x)

            if width > 0:
                normalized = openness / width
            else:
                normalized = 0.0

            speaking = normalized > 0.1
            if speaking:
                speaking_frames += 1

            total_openness += normalized

            frames.append(
                {
                    "frame": frame_count - 1,
                    "timestamp": round(timestamp, 3),
                    "face_detected": True,
                    "lip_openness": round(normalized, 4),
                    "is_speaking": speaking,
                }
            )

            if publisher and processed % 50 == 0:
                publisher.progress(
                    "lip",
                    processed,
                    total_frames // sample_interval,
                    f"openness={normalized:.3f}",
                )

    cap.release()
    detector.close()

    avg_openness = total_openness / processed if processed > 0 else 0.0
    speaking_rate = speaking_frames / processed if processed > 0 else 0.0

    result = {
        "frame_count": total_frames,
        "fps": fps,
        "processed_frames": processed,
        "sample_interval": sample_interval,
        "frames": frames,
        "stats": {
            "speaking_frames": speaking_frames,
            "speaking_rate": round(speaking_rate, 4),
            "avg_openness": round(avg_openness, 4),
        },
    }

    if publisher:
        publisher.complete("lip", f"{len(frames)} frames")

    with open(output_path, "w") as f:
        json.dump(result, f, indent=2)

    sys.stderr.write(f"LIP: Done, {len(frames)} frames\n")
    sys.exit(0)


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("video_path")
    parser.add_argument("output_path")
    parser.add_argument("--uuid", "-u", default="")
    parser.add_argument("--sample-interval", "-s", type=int, default=30)
    args = parser.parse_args()

    process_lip(args.video_path, args.output_path, args.uuid, args.sample_interval)