import sys
import csv
from pathlib import Path

def fix_decimal_csv(input_path, output_path):
    with open(input_path, 'r', newline='', encoding='utf-8') as infile, \
         open(output_path, 'w', newline='', encoding='utf-8') as outfile:
        reader = csv.reader(infile)
        writer = csv.writer(outfile)
        # Write the first line (scene name) as is
        scene_line = next(reader)
        writer.writerow(scene_line)
        # Write the header as is (if present)
        header = next(reader)
        writer.writerow(header)
        for row in reader:
            # Keep first two columns as is
            fixed_row = row[:2]
            # Join every pair of columns from the third onward
            for i in range(2, len(row), 2):
                if i+1 < len(row):
                    fixed_val = f'{row[i]}.{row[i+1]}'
                    fixed_row.append(fixed_val)
            writer.writerow(fixed_row)

if __name__ == '__main__':
    # Find all matching CSVs recursively
    root = Path('.')
    out_root = root / 'Recordings'
    out_root.mkdir(exist_ok=True)
    csv_files = list(root.rglob('P*_PositionData*.csv'))
    for csv_file in csv_files:
        # Compute output path in Recordings dir, preserving subdirs
        rel_path = csv_file.relative_to(root)
        out_path = out_root / rel_path
        out_path.parent.mkdir(parents=True, exist_ok=True)
        fix_decimal_csv(csv_file, out_path)
        print(f'Corrected file written to: {out_path}')