#!/usr/bin/env python3
"""
Script to add jyutping column to all metadata.csv files in the dataset.
Includes custom entries for specific terms.
"""

import csv
import os
import ToJyutping
from pathlib import Path

def add_jyutping_to_csv(csv_path, converter):
    """Add jyutping column to a CSV file using the provided converter."""
    print(f"Processing {csv_path}...")
    
    # Read the CSV file
    rows = []
    with open(csv_path, 'r', encoding='utf-8') as f:
        reader = csv.DictReader(f)
        fieldnames = reader.fieldnames
        
        # Add jyutping to fieldnames if not already present
        if 'jyutping' not in fieldnames:
            fieldnames = fieldnames + ['jyutping']
        
        # Process each row
        for i, row in enumerate(reader):
            # Get jyutping for the transcription
            transcription = row['transcription']
            jyutping = converter.get_jyutping_text(transcription)
            row['jyutping'] = jyutping
            rows.append(row)
            
            # Progress indicator
            if (i + 1) % 1000 == 0:
                print(f"  Processed {i + 1} rows...")
    
    # Write the updated CSV
    output_path = csv_path.with_suffix('.tmp')
    with open(output_path, 'w', encoding='utf-8', newline='') as f:
        writer = csv.DictWriter(f, fieldnames=fieldnames)
        writer.writeheader()
        writer.writerows(rows)
    
    # Replace the original file
    output_path.replace(csv_path)
    print(f"  Completed! Total rows processed: {len(rows)}")

def main():
    """Main function to process all metadata.csv files."""
    
    # Create a customized converter with specific entries
    # Add more custom entries here as needed
    custom_entries = {
        '刻': 'hak1',
    }
    
    # Create the customized converter
    converter = ToJyutping.customize(custom_entries)
    
    # Define the paths to all metadata.csv files
    csv_files = [
        Path("/Users/laufei/Documents/GitHub/zoengjyutgaai_saamgwokjinji/opus/seoiwuzyun/metadata.csv"),
        Path("/Users/laufei/Documents/GitHub/zoengjyutgaai_saamgwokjinji/opus/saamgwokjinji/metadata.csv"),
        Path("/Users/laufei/Documents/GitHub/zoengjyutgaai_saamgwokjinji/opus/mouzaakdung/metadata.csv"),
        Path("/Users/laufei/Documents/GitHub/zoengjyutgaai_saamgwokjinji/opus/lukdinggei/metadata.csv")
    ]
    
    print("Using custom entries:")
    for term, jyutping in custom_entries.items():
        print(f"  {term} -> {jyutping}")
    print()
    
    # Process each file
    for csv_file in csv_files:
        if csv_file.exists():
            add_jyutping_to_csv(csv_file, converter)
        else:
            print(f"Warning: {csv_file} not found!")
    
    print("\nAll files processed successfully!")

if __name__ == "__main__":
    main()