import os
import sys
import time

# Add project root to sys.path
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from suspicious_behavior.pipeline.frame_analyzer import FrameAnalyzer
from suspicious_behavior.pipeline.video_processor import VideoProcessor

def main():
    video_path = "samples/FullSizeRender.mov"
    output_dir = "outputs"
    output_path = os.path.join(output_dir, "FullSizeRender_annotated.mp4")
    
    os.makedirs(output_dir, exist_ok=True)
    
    if not os.path.exists(video_path):
        print(f"Error: Sample video not found at {video_path}")
        sys.exit(1)
        
    print(f"[Validation] Opening video file: {video_path}...")
    processor = VideoProcessor(target_fps=10.0)
    metadata = processor.get_metadata(video_path)
    print(f"[Validation] Video metadata: {metadata}")
    
    print("[Validation] Initializing FrameAnalyzer (loading models)...")
    analyzer = FrameAnalyzer(camera_id="val_camera_1", violence_stride=8)
    
    processed_frames = []
    latencies = []
    all_alerts = []
    
    print("[Validation] Starting frame-by-frame analysis...")
    start_total_time = time.time()
    
    try:
        for frame_idx, frame, timestamp in processor.extract_frames_generator(video_path):
            t0 = time.time()
            annotated, alerts, frame_meta = analyzer.analyze(frame, fps=10.0, output_base64=False)
            t_elapsed = (time.time() - t0) * 1000.0
            
            latencies.append(t_elapsed)
            processed_frames.append(annotated)
            
            for alert in alerts:
                all_alerts.append((frame_idx, alert))
                
            # Print frame summary every 10 processed frames
            if len(processed_frames) % 10 == 0:
                print(
                    f"Frame {frame_idx:04d} ({timestamp:.2f}s) | "
                    f"Latency: {t_elapsed:.1f}ms | "
                    f"People: {frame_meta['active_tracks_count']} | "
                    f"Threats: {frame_meta['threats_detected']}"
                )
    except KeyboardInterrupt:
        print("[Validation] Interrupted by user. Compiling what we have...")
        
    total_time = time.time() - start_total_time
    
    if not latencies:
        print("[Validation] No frames processed.")
        sys.exit(1)
        
    avg_latency = sum(latencies) / len(latencies)
    throughput_fps = len(processed_frames) / total_time
    
    print("\n--- Validation Statistics ---")
    print(f"Frames Processed: {len(processed_frames)}")
    print(f"Total Analysis Time: {total_time:.2f} seconds")
    print(f"System Throughput: {throughput_fps:.2f} FPS")
    print(f"Average Frame Latency: {avg_latency:.1f} ms")
    print(f"Active Alerts Triggered: {len(all_alerts)}")
    
    for f_idx, alert in all_alerts:
        print(f"  - Frame {f_idx}: [{alert.severity}] {alert.threat_type} ({alert.confidence*100:.1f}%)")
        
    print(f"\n[Validation] Compiling output video to: {output_path}...")
    processor.write_frames_to_video(
        processed_frames,
        output_path,
        fps=10.0,
        frame_size=(metadata['width'], metadata['height'])
    )
    print("[Validation] Finished successfully!")

if __name__ == "__main__":
    main()