#!/usr/bin/env python3
"""
Command-line interface for lane detection
Usage: python cli.py <input_video> <output_video> [method] [enhanced] [segmented]
"""
import sys
import os
from lane_detection import process_video


def main():
    if len(sys.argv) < 3 or len(sys.argv) > 6:
        print("Usage: python cli.py <input_video> <output_video> [method] [enhanced] [segmented]")
        print("\nArguments:")
        print("  input_video: Path to input video file")
        print("  output_video: Path to output video file")
        print("  method: 'basic_standard', 'basic_segmented', 'advanced', 'yolop', 'ufld', or 'scnn' (default: advanced)")
        print("  enhanced: 'true' or 'false' for enhanced thresholding (default: true, advanced only)")
        print("  segmented: 'true' or 'false' for segmented lines (default: false, basic only)")
        print("\nExamples:")
        print("  python cli.py road_video.mp4 output_result.mp4")
        print("  python cli.py road_video.mp4 output_result.mp4 yolop")
        print("  python cli.py road_video.mp4 output_result.mp4 ufld")
        print("  python cli.py road_video.mp4 output_result.mp4 scnn")
        print("  python cli.py road_video.mp4 output_result.mp4 basic_standard")
        print("  python cli.py road_video.mp4 output_result.mp4 basic_segmented")
        print("  python cli.py road_video.mp4 output_result.mp4 advanced true false")
        sys.exit(1)

    input_path = sys.argv[1]
    output_path = sys.argv[2]
    method = sys.argv[3] if len(sys.argv) >= 4 else "advanced"
    enhanced = sys.argv[4].lower() == "true" if len(sys.argv) >= 5 else True
    segmented = sys.argv[5].lower() == "true" if len(sys.argv) >= 6 else False

    # Validate method
    valid_methods = ["basic_standard", "basic_segmented", "advanced", "yolop", "ufld", "scnn"]
    if method not in valid_methods:
        print(f"Error: Invalid method '{method}'. Use one of: {', '.join(valid_methods)}")
        sys.exit(1)

    # Check if input file exists
    if not os.path.exists(input_path):
        print(f"Error: Input file '{input_path}' not found!")
        sys.exit(1)

    print(f"Processing video: {input_path}")
    print(f"Output will be saved to: {output_path}")
    print(f"Method: {method}")
    if method == "advanced":
        print(f"Enhanced thresholding: {'enabled' if enhanced else 'disabled'}")
    if method in ["basic_standard", "basic_segmented"]:
        print(f"Segmented lines: {'enabled' if segmented else 'disabled'}")
    print("\nProcessing...")

    try:
        success = process_video(input_path, output_path, method, enhanced, segmented)

        if success:
            print("\n✓ Video processing completed successfully!")
            print(f"✓ Result saved to: {output_path}")

            if os.path.exists(output_path):
                size = os.path.getsize(output_path)
                print(f"✓ File size: {size:,} bytes")
        else:
            print("\n✗ Video processing failed!")
            sys.exit(1)
    except Exception as e:
        print(f"\n✗ Error during processing: {e}")
        import traceback
        traceback.print_exc()
        sys.exit(1)


if __name__ == "__main__":
    try:
        main()
    except KeyboardInterrupt:
        print("\n\nOperation cancelled by user.")
        sys.exit(0)
    except Exception as e:
        print(f"\n✗ Unexpected error: {e}")
        import traceback
        traceback.print_exc()
        sys.exit(1)