import cv2
import os
import matplotlib.pyplot as plt

path = "./imgs/"
cut_img_path = "./cut_img/"
d_map = {0: 'code', 1: 'logo', 2: 'style', 3: 'table', 4: 'text', 5: 'title'}

def makedir(dir):
    if not os.path.exists(dir):
        os.makedirs(dir)

def xywh2lrbt(img_w, img_h, box):
    c, x, y, w, h = int(box[0]), float(box[1]), float(box[2]), float(box[3]), float(box[4])
    print(c, x, y, w, h)
    print("+++++++++++++++++")
    x = x * img_w  # 中心坐标x
    w = w * img_w  # box的宽
    y = y * img_h  # 中心坐标y
    h = h * img_h  # box的高
    print(c, x, y, w, h)

    lt_x, lt_y = max(0, x - w / 2), max(0, y - h / 2)  # left_top_x, left_top_y
    lb_x, lb_y = max(0, x - w / 2), min(img_h, y + h / 2)  # left_bottom_x, left_bottom_y
    rb_x, rb_y = min(img_w, x + w / 2), min(img_h, y + h / 2)  # right_bottom_x, right_bottom_y
    rt_x, rt_y = min(img_w, x + w / 2), max(0, y - h / 2)  # right_top_x, right_bottom_y

    lrbt = [[lt_x, lt_y], [lb_x, lb_y], [rb_x, rb_y], [rt_x, rt_y]]
    print(lrbt)

    return lrbt, c


img_cls = os.listdir(path)  # 获取train，valid，test目录名称
print(img_cls)
# 遍历每个目录，拿到图片和标签
for img_cla in img_cls:
    # print(img_cla)
    images_path = path + img_cla + "/images/"
    labels_path = path + img_cla + "/labels/"
    list_images = os.listdir(images_path)
    list_labels = os.listdir(labels_path)

    for m in range(len(list_images)):
        image = list_images[m]
        img_name = os.path.splitext(image)[0]
        if image != "784_jpg.rf.8a0d3a961866d9bda06a53d9bf2fbc40.jpg":
            continue
        for n in range(len(list_labels)):
            label = list_labels[n]
            label_name = os.path.splitext(label)[0]

            if img_name != label_name:
                continue
            else:
                # print(image)
                # print(label)
                # print(img_cla)
                # print("==================")

                img = cv2.imread(images_path + image)
                img_h, img_w, _ = img.shape
                arr_label = []  # labels的边界框，存储四个顶点坐标
                ori_clas = []  # label的真实类别
                with open(labels_path + label, mode="r", encoding="utf-8") as f:
                    lines = f.readlines()

                # some labels are [],-----> image not idea
                if not lines:
                    break

                for line in lines:
                    line = line.split(" ")
                    lrbt, c = xywh2lrbt(img_w, img_h, line)
                    arr_label.append(lrbt)
                    ori_clas.append(c)

                num = 0
                for i in range(len(arr_label)):
                    lt_x, lt_y = int(arr_label[i][0][0]), int(arr_label[i][0][1])
                    rb_x, rb_y = int(arr_label[i][2][0]), int(arr_label[i][2][1])

                    cls_num = ori_clas[i]
                    cls = d_map[cls_num]
                    print(cls)
                    makedir(cut_img_path + cls)

                    # 切割真实标签，并保存到本地
                    # print(lt_y)
                    # print(rb_y)
                    # print(lt_x)
                    # print(rb_x)
                    if lt_x >= rb_x or lt_y >= rb_y:
                        continue
                    cut_ori_img = img[lt_y:rb_y, lt_x:rb_x, :]
                    # plt.imshow(cut_ori_img[:,:,::-1])
                    # plt.show()
                    save_cut_ori_img = cut_img_path + cls + "/" + str(img_cla) + "_" + str(m) + "_" + str(cls) + "_" + str(num) + ".jpg"
                    # cv2.imwrite(save_cut_ori_img, cut_ori_img)
                    num += 1

                break