import time
from pathlib import Path
import datetime

import cv2
import numpy as np
import torch
import torch.backends.cudnn as cudnn
import os

from read_data import LoadImages, LoadStreams
from tools.draw_chinese import cv2ImgAddText

class PCBDetection():


    def __init__(self, video_path=None):
        self.model = torch.hub.load((os.getcwd()) + "/algorithm/yolov5", 'custom', source='local', path='./weight/pcb.pt', force_reload=True)
        self.classes = self.model.names
        self.imgsz = 640
        self.stride = self.model.stride
        # print( self.stride)
        self.frame = [None]

        if video_path is not None:
            self.video_name = video_path
        else:
            self.video_name = 'vid2.mp4'  # A default video file

        self.device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
        self.dataset = LoadImages(self.video_name, img_size=self.imgsz, stride =  self.stride)

    def use_webcam(self, source):
        # self.dataset.release()  # Release any existing video capture
        # self.cap = cv2.VideoCapture(0)  # Open default webcam
        # print('use_webcam')
        self.source = source
        cudnn.benchmark = True
        # self.dataset = LoadStreams(source, img_size=self.imgsz)
        self.dataset = LoadStreams(source)

    def class_to_label(self, x):
        return self.classes[int(x)]

    def get_frame(self):
        
        chinese_name = ['漏孔', '鼠牙洞', '开路', '短路', '毛刺', '杂铜']
        i = 0
    
        for im0s in self.dataset:
            # print(self.dataset.mode)
            # print(self.dataset)
            if self.dataset.mode == 'stream':
                img = im0s[0].copy()
            else:
                img = im0s.copy()
            img = cv2.cvtColor(img, cv2.COLOR_RGB2BGR)
            results = self.model(img, size=640)
            img = cv2.cvtColor(img, cv2.COLOR_RGB2BGR)

        # Loop through each detected object and count the people
            accuracy = 0
            num_problem = len(results.xyxy[0])
            bgr = (0, 255, 0)

       
            for obj in results.xyxy[0]:

                xmin, ymin, xmax, ymax = map(int, obj[:4])

                accuracy = obj[4]              
                
                c = int(obj[-1])
                

                if self.classes[c] == 'missing_hole':
                    color = (255, 200, 90)
                elif self.classes[c] == 'mouse_bite':
                    color = (0, 0, 255)
                elif self.classes[c] == 'caopen_circuitr':
                    color = (0, 255, 0)
                elif self.classes[c] == 'short':
                    color = (50, 50, 50)
                elif self.classes[c] == 'spur':
                    color = (255, 0, 0)
                elif self.classes[c] == 'spurious_copper':
                    color = (0, 0, 0)      
            
                cv2.rectangle(img, (xmin, ymin), (xmax, ymax), color, 2)
                
                            
                img = cv2ImgAddText(img, 
                    f'{chinese_name[c]}',
                xmax + 2, 
                ymin - 1,
                    (0, 250, 0),
                    20,)
                # cv2.putText(img, f"{self.classes[c]}, {round(float(accuracy), 2)}", (xmin, ymin),
                #                     cv2.FONT_HERSHEY_SIMPLEX,  0.5, (255, 255, 255), 1)
                
            ret, jpeg = cv2.imencode(".jpg", img)
      
    
            resText=f'PCB检测到{num_problem}个缺陷'
            # print(num_people)
            i = i+1
            return jpeg.tobytes(), resText