import json
import os
import argparse

def populate_paths(annotations_file: str, integrated_file: str, output_file: str):
    # Load existing annotations
    with open(annotations_file, 'r', encoding='utf-8') as f:
        annotations = json.load(f)

    # Load integrated_output_v2 entries
    with open(integrated_file, 'r', encoding='utf-8') as f:
        integrated = json.load(f)

    # Update paths
    for item in integrated:
        img = item.get('s3_fileUrl', '')
        vid = item.get('s3_instructionReference', '')
        parts = img.rstrip('/').split('/')
        if len(parts) < 2:
            continue
        clip_id = parts[-2]                   # e.g. 'clip_305_000786'
        frame_file = parts[-1]                # e.g. 'frame_000786.png'
        frame_id = os.path.splitext(frame_file)[0]
        key = f"{clip_id}_{frame_id}"        # matches your JSON key

        if key in annotations:
            annotations[key]['image_path'] = img
            annotations[key]['video_path'] = vid

    # Write back
    with open(output_file, 'w', encoding='utf-8') as f:
        json.dump(annotations, f, indent=4, ensure_ascii=False)
    print(f"Updated file written to {output_file}")

if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description="Populate image_path and video_path in drama_x_annotations.json"
    )
    parser.add_argument(
        "annotations",
        help="Path to existing drama_x_annotations.json"
    )
    parser.add_argument(
        "integrated",
        help="Path to integrated_output_v2.json"
    )
    parser.add_argument(
        "-o", "--output",
        default="drama_x_annotations_populated.json",
        help="Where to save the updated annotations"
    )
    args = parser.parse_args()
    populate_paths(args.annotations, args.integrated, args.output)