import json
import cv2
import numpy as np
import os
from torch.utils.data import Dataset
from PIL import Image
import cv2
from .data_utils import * 
from .base import BaseDataset
import albumentations as A

class VitonHDDataset(BaseDataset):
    def __init__(self, image_dir):
        self.image_root = image_dir
        self.data = os.listdir(self.image_root)
        self.size = (512,512)
        self.clip_size = (224,224)
        self.dynamic = 2

    def __len__(self):
        return 20000

    def check_region_size(self, image, yyxx, ratio, mode = 'max'):
        pass_flag = True
        H,W = image.shape[0], image.shape[1]
        H,W = H * ratio, W * ratio
        y1,y2,x1,x2 = yyxx
        h,w = y2-y1,x2-x1
        if mode == 'max':
            if h > H and w > W:
                pass_flag = False
        elif mode == 'min':
            if h < H and w < W:
                pass_flag = False
        return pass_flag
            
    def get_sample(self, idx):

        ref_image_path = os.path.join(self.image_root, self.data[idx])
        tar_image_path = ref_image_path.replace('/cloth/', '/image/')
        ref_mask_path = ref_image_path.replace('/cloth/','/cloth-mask/')
        tar_mask_path = ref_image_path.replace('/cloth/', '/image-parse-v3/').replace('.jpg','.png')

        # Read Image and Mask
        ref_image = cv2.imread(ref_image_path)
        ref_image = cv2.cvtColor(ref_image, cv2.COLOR_BGR2RGB)

        tar_image = cv2.imread(tar_image_path)
        tar_image = cv2.cvtColor(tar_image, cv2.COLOR_BGR2RGB)

        ref_mask = (cv2.imread(ref_mask_path) > 128).astype(np.uint8)[:,:,0]

        tar_mask = Image.open(tar_mask_path ).convert('P')
        tar_mask= np.array(tar_mask)
        tar_mask = tar_mask == 5

        item_with_collage = self.process_pairs(ref_image, ref_mask, tar_image, tar_mask, max_ratio = 1.0)
        sampled_time_steps = self.sample_timestep()
        item_with_collage['time_steps'] = sampled_time_steps
        return item_with_collage

