"""
将文件按照特定的规则重命名
规则：
    {order}_{label_num}_{labels}.jpg
    {order}_{label_num}_{labels}.txt
"""
import os
import json
from collections import defaultdict


labels_path = './labels'
images_path = './images'
dataset_label_info = defaultdict(int)
for i in range(61):
    dataset_label_info[str(i)] = 0


# find all the txt files in the folder
def find_txt_files():
    return os.listdir(labels_path)


# generate the new name for the file
def generate_new_name(old_name, order):
    """
    generate the new name(without extension) according to the label info
    :param old_name: the label file name
    :param order: the unique order
    :return:
    """
    global dataset_label_info

    # read the file
    with open(f'{labels_path}/{old_name}', 'r') as f:
        labels = f.readlines()

    # default dict to store the label info, default value is 0
    label_info = defaultdict(int)
    label_num = 0

    for label in labels:
        label = label.strip().split(' ')
        label_class = label[0]
        if label_class == '46':
            pass
        label_info[label_class] += 1
        dataset_label_info[label_class] += 1
        label_num += 1

    # label_class_all = ''.join([f'{k}' for k, v in label_info.items()])
    new_name = f'{order}_{label_num}'

    return new_name


def main():
    txt_files = find_txt_files()
    # rename all the txt files to init to avoid the conflict
    for i, txt_file in enumerate(txt_files):
        new_name = f'init_{i}'
        os.rename(f'{labels_path}/{txt_file}', f'{labels_path}/{new_name}.txt')

        if os.path.exists(f'{images_path}/{txt_file.replace(".txt", ".jpg")}'):
            os.rename(f'{images_path}/{txt_file.replace(".txt", ".jpg")}', f'{images_path}/{new_name}.jpg')

        elif os.path.exists(f'{images_path}/{txt_file.replace(".txt", ".png")}'):
            os.rename(f'{images_path}/{txt_file.replace(".txt", ".png")}', f'{images_path}/{new_name}.jpg')

        elif os.path.exists(f'{images_path}/{txt_file.replace(".txt", ".jpeg")}'):
            os.rename(f'{images_path}/{txt_file.replace(".txt", ".jpeg")}', f'{images_path}/{new_name}.jpg')

        else:
            raise FileNotFoundError(f'No image file found for {txt_file}')

    txt_files = find_txt_files()
    for i, txt_file in enumerate(txt_files):

        new_name = generate_new_name(txt_file, i)
        print(f'{txt_file} -> {new_name}')

        os.rename(f'{labels_path}/{txt_file}', f'{labels_path}/{new_name}.txt')
        os.rename(f'{images_path}/{txt_file.replace(".txt", ".jpg")}', f'{images_path}/{new_name}.jpg')

    # save the dataset label info
    with open('dataset_label_info.json', 'w') as f:
        json.dump(dataset_label_info, f)


if __name__ == '__main__':
    main()