import json
import os
import sys
import argparse
from pathlib import Path


def process_json_file(input_file_path, output_dir):
    try:
        with open(input_file_path, "r", encoding="utf-8") as f:
            data = json.load(f)

        if "data_path" in data and data["data_path"]:
            original_path = data["data_path"]
            filename = os.path.basename(original_path)
            data["data_path"] = filename
            print(f"Processing file: {os.path.basename(input_file_path)}")
            print(f"  Original path: {original_path}")
            print(f"  Replaced with: {filename}")

        os.makedirs(output_dir, exist_ok=True)

        output_file_path = os.path.join(output_dir, os.path.basename(input_file_path))
        with open(output_file_path, "w", encoding="utf-8") as f:
            json.dump(data, f, indent=4, ensure_ascii=False)

        print(f"  Saved to: {output_file_path}\n")
        return True
    except json.JSONDecodeError as e:
        print(f"Error: Failed to parse JSON file {input_file_path}: {e}\n")
        return False
    except Exception as e:
        print(f"Error: Failed to process file {input_file_path}: {e}\n")
        return False


def main():
    parser = argparse.ArgumentParser(description="Process all JSON files in a directory, replacing data_path field paths with filenames")
    parser.add_argument("input_dir", type=str, help="Input directory path containing JSON files")
    parser.add_argument("output_dir", type=str, help="Output directory path for processed JSON files")

    args = parser.parse_args()

    input_dir = Path(args.input_dir)
    output_dir = Path(args.output_dir)

    if not input_dir.exists():
        print(f"Error: Input directory does not exist: {input_dir}")
        sys.exit(1)

    if not input_dir.is_dir():
        print(f"Error: Input path is not a directory: {input_dir}")
        sys.exit(1)

    json_files = list(input_dir.glob("*.json"))

    if not json_files:
        print(f"Warning: No JSON files found in directory {input_dir}")
        sys.exit(0)

    print(f"Found {len(json_files)} JSON files\n")

    success_count = 0
    for json_file in json_files:
        if process_json_file(json_file, output_dir):
            success_count += 1

    print(f"\nProcessing complete: Successfully processed {success_count}/{len(json_files)} files")


if __name__ == "__main__":
    main()