import json
import os
import tqdm
def preprocess():
    all_train = json.load(open('trainval.json', 'r'))


    im_ids = set()
    for vqa_id, vqa in all_train.items():
        im_ids.add(vqa['obs'][0])


    move_to_mapping = dict()

    subfolder_id = 0
    subfolder_num_items = 0
    max_items = 5000
    for im_id in im_ids:
        move_to_mapping[im_id] = subfolder_id
        subfolder_num_items += 1
        if subfolder_num_items >= max_items:
            subfolder_id += 1
            subfolder_num_items = 0


    json.dump(move_to_mapping, open('move_to_mapping.json', 'w'), indent=2)
    print(len(im_ids))



def refactor():
    new_root_folder = 'trainval_obs'
    if not os.path.exists(new_root_folder):
        os.makedirs(new_root_folder)
    move_to_mapping = json.load(open('move_to_mapping.json', 'r'))
    all_train = json.load(open('trainval.json', 'r'))

    for vqa_id, vqa in tqdm.tqdm(all_train.items(), total=len(all_train)):
        im_id = vqa['obs'][0]

        im_file_name = os.path.basename(im_id)

        
        subfolder_id = move_to_mapping[im_id]
        subfolder_path = os.path.join(new_root_folder, str(subfolder_id))

        new_im_path = os.path.join(subfolder_path, im_file_name)

        if not os.path.exists(subfolder_path):
            os.makedirs(subfolder_path)
        if not os.path.exists(new_im_path):
            #print(f'Moving {im_id} to {new_im_path}')
            os.rename(im_id, new_im_path)

        vqa['obs'] = [new_im_path]
    
    json.dump(all_train, open('updated_trainval.json', 'w'), indent=2)


def sanity_check():
    prev_vqas = json.load(open('trainval.json', 'r'))
    now_vqas = json.load(open('updated_trainval.json', 'r'))
    assert len(prev_vqas) == len(now_vqas), 'Number of VQAs should be the same after refactoring.'
    for vqa_id, vqa in now_vqas.items():
        assert prev_vqas[vqa_id]['obs'][0] != vqa['obs'][0], 'VQA obs should be updated after refactoring.'
        old_im_name = os.path.basename(prev_vqas[vqa_id]['obs'][0])
        new_im_name = os.path.basename(vqa['obs'][0])
        assert old_im_name == new_im_name, 'Image file names should be the same'



if __name__ == '__main__':
    pass