#-*-coding:utf-8-*-
# date:2020-04-11
# Author: Eric.Lee
# function: common utils

import os
import shutil
import cv2
import numpy as np
import json

def mkdir_(path, flag_rm=False):
    if os.path.exists(path):
        if flag_rm == True:
            shutil.rmtree(path)
            os.mkdir(path)
            print('remove {} done ~ '.format(path))
    else:
        os.mkdir(path)

def plot_box(bbox, img, color=None, label=None, line_thickness=None):
    tl = line_thickness or round(0.002 * max(img.shape[0:2])) + 1
    color = color or [random.randint(0, 255) for _ in range(3)]
    c1, c2 = (int(bbox[0]), int(bbox[1])), (int(bbox[2]), int(bbox[3]))
    cv2.rectangle(img, c1, c2, color, thickness=tl)# 目标的bbox
    if label:
        tf = max(tl - 2, 1)
        t_size = cv2.getTextSize(label, 0, fontScale=tl / 3, thickness=tf)[0] # label size
        c2 = c1[0] + t_size[0], c1[1] - t_size[1] - 3 # 字体的bbox
        cv2.rectangle(img, c1, c2, color, -1)  # label 矩形填充
        # 文本绘制
        cv2.putText(img, label, (c1[0], c1[1] - 2), 0, tl / 4, [225, 255, 255],thickness=tf, lineType=cv2.LINE_AA)

class JSON_Encoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, np.integer):
            return int(obj)
        elif isinstance(obj, np.floating):
            return float(obj)
        elif isinstance(obj, np.ndarray):
            return obj.tolist()
        else:
            return super(JSON_Encoder, self).default(obj)