import os
import sys
from PIL import Image
import argparse
import json
if __name__ == '__main__':
    defaults=json.load(open('defaults.json'))
    parser = argparse.ArgumentParser()
    parser.add_argument('--original', help='Path to the original images', default=defaults['original'])
    parser.add_argument('--webp', help='Path to the webp images', default=defaults['webp'])
    parser.add_argument('--quality', help='Quality of the webp images', default=defaults['quality'], type=int)
    parser.add_argument('--overwrite', help='Overwrite existing images', action='store_true')
    args = parser.parse_args()

    if not os.path.exists(args.original):
        os.makedirs(args.original)
        print("Created directory: " + args.original)
    if not os.path.exists(args.webp):
        os.makedirs(args.webp)
        print("Created directory: " + args.webp)
    
    originalfiles = [f for f in os.listdir(args.original) if os.path.isfile(os.path.join(args.original, f))]
    existingfiles = [f for f in os.listdir(args.webp) if os.path.isfile(os.path.join(args.webp, f))]
       
    for f in originalfiles:
        if f.split(".")[0] + '.webp' in existingfiles and not args.overwrite:
            print("skipped: " + f)
            continue
        try:
            im = Image.open(os.path.join(args.original, f)).convert('RGB')
            im.save(os.path.join(args.webp, f.split(".")[0] + '.webp'), 'WEBP', quality=args.quality)
            print("optimized: " + f)
        except OSError:
            print("Falied to optimize the picture: " + f)
            print("Error: ", sys.exc_info()[0])