#!/usr/bin/env python3
"""
Generate caption files from word-level timestamps.
"""

import json
import sys
from pathlib import Path

# Add backend to path
sys.path.insert(0, str(Path(__file__).parent))

from services.caption_generator import generate_srt, generate_vtt, generate_ass, save_captions


def main():
    if len(sys.argv) < 2:
        print("Usage: python caption_generator.py <command> [args...]", file=sys.stderr)
        sys.exit(1)

    command = sys.argv[1]

    try:
        if command == "generate_srt":
            if len(sys.argv) < 4:
                print("Usage: python caption_generator.py generate_srt <words_json> [deleted_indices_json] [words_per_line]", file=sys.stderr)
                sys.exit(1)
            words = json.loads(sys.argv[2])
            deleted_indices = set(json.loads(sys.argv[3])) if len(sys.argv) > 3 and sys.argv[3] != "null" else None
            words_per_line = int(sys.argv[4]) if len(sys.argv) > 4 else 8

            result = generate_srt(words, deleted_indices, words_per_line)
            print(json.dumps({"content": result}))

        elif command == "generate_vtt":
            if len(sys.argv) < 4:
                print("Usage: python caption_generator.py generate_vtt <words_json> [deleted_indices_json] [words_per_line]", file=sys.stderr)
                sys.exit(1)
            words = json.loads(sys.argv[2])
            deleted_indices = set(json.loads(sys.argv[3])) if len(sys.argv) > 3 and sys.argv[3] != "null" else None
            words_per_line = int(sys.argv[4]) if len(sys.argv) > 4 else 8

            result = generate_vtt(words, deleted_indices, words_per_line)
            print(json.dumps({"content": result}))

        elif command == "generate_ass":
            if len(sys.argv) < 4:
                print("Usage: python caption_generator.py generate_ass <words_json> [deleted_indices_json] [words_per_line] [style_json]", file=sys.stderr)
                sys.exit(1)
            words = json.loads(sys.argv[2])
            deleted_indices = set(json.loads(sys.argv[3])) if len(sys.argv) > 3 and sys.argv[3] != "null" else None
            words_per_line = int(sys.argv[4]) if len(sys.argv) > 4 else 8
            style = json.loads(sys.argv[5]) if len(sys.argv) > 5 and sys.argv[5] != "null" else None

            result = generate_ass(words, deleted_indices, words_per_line, style)
            print(json.dumps({"content": result}))

        elif command == "save_captions":
            if len(sys.argv) != 4:
                print("Usage: python caption_generator.py save_captions <content> <output_path>", file=sys.stderr)
                sys.exit(1)
            content = sys.argv[2]
            output_path = sys.argv[3]

            result = save_captions(content, output_path)
            print(json.dumps({"output_path": result}))

        else:
            print(f"Unknown command: {command}", file=sys.stderr)
            sys.exit(1)

    except Exception as e:
        print(json.dumps({"error": str(e)}), file=sys.stderr)
        sys.exit(1)


if __name__ == "__main__":
    main()