# coding=utf-8
import os
import torch
import numpy as np
from PIL import Image
from torchvision import transforms
import argparse
from models.modeling import VisionTransformer, CONFIGS
import time



#模型测试单张图片
parser = argparse.ArgumentParser()
parser.add_argument("--dataset", choices=["emptyJudge5"], default="emptyJudge5", help="Which dataset.")
parser.add_argument("--img_size", default=600, type=int, help="Resolution size")
parser.add_argument('--split', type=str, default='overlap', help="Split method")  # non-overlap
parser.add_argument('--slide_step', type=int, default=2, help="Slide step for overlap split")
parser.add_argument('--smoothing_value', type=float, default=0.0, help="Label smoothing value\n")
parser.add_argument("--pretrained_model", type=str, default="output/ieemooempty_checkpoint_good.pth", help="load pretrained model")
#parser.add_argument("--pretrained_model", type=str, default="output/ieemooempty_vit_checkpoint.pth", help="load pretrained model") #使用自定义VIT
args = parser.parse_args()

args.device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
args.nprocs = torch.cuda.device_count()

# 准备模型
config = CONFIGS["ViT-B_16"]
config.split = args.split
config.slide_step = args.slide_step

num_classes = 5
cls_dict = {0: "noemp", 1: "yesemp", 2: "hard", 3: "fly", 4: "stack"}




model = VisionTransformer(config, args.img_size, zero_head=True, num_classes=num_classes, smoothing_value=args.smoothing_value)

if args.pretrained_model is not None:
    model = torch.load(args.pretrained_model) #自己预训练模型
model.to(args.device)
model.eval()

test_transform = transforms.Compose([transforms.Resize((600, 600), Image.BILINEAR),
                                     transforms.ToTensor(),
                                     transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])])



#自定义Vit模型
# test_transform = transforms.Compose([transforms.Resize((320, 320), Image.BILINEAR),
#                                      transforms.ToTensor(),
#                                      transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])])



#img = Image.open("img.jpg")

img = Image.open("img.jpg")


x = test_transform(img)


startime = time.process_time()

part_logits = model(x.unsqueeze(0).to(args.device))

probs = torch.nn.Softmax(dim=-1)(part_logits)
top5 = torch.argsort(probs, dim=-1, descending=True)
print("Prediction Label\n")
for idx in top5[0, :5]:
    print(f'{probs[0, idx.item()]:.5f} : {cls_dict[idx.item()]}', end='\n')

endtime = time.process_time()

print("Time cost:"+ str(endtime - startime)) #评估一张图片耗时2.8秒