import time

from models.line_detect.postprocess import show_predict
import os

import torch
from PIL import Image
import matplotlib.pyplot as plt
import matplotlib as mpl
import numpy as np
from models.line_detect.line_net import linenet_resnet50_fpn
from torchvision import transforms

# from models.wirenet.postprocess import postprocess
from models.wirenet.postprocess import postprocess

device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')


def load_best_model(model, save_path, device):
    if os.path.exists(save_path):
        checkpoint = torch.load(save_path, map_location=device)
        model.load_state_dict(checkpoint['model_state_dict'])
        # if optimizer is not None:
        #     optimizer.load_state_dict(checkpoint['optimizer_state_dict'])
        epoch = checkpoint['epoch']
        loss = checkpoint['loss']
        print(f"Loaded best model from {save_path} at epoch {epoch} with loss {loss:.4f}")
    else:
        print(f"No saved model found at {save_path}")
    return model

def box_line_(pred):
    for idx, box_ in enumerate(pred[0:-1]):
        box = box_['boxes']  # 是一个tensor
        line = pred[-1]['wires']['lines'][idx].cpu().numpy() / 128 * 512
        score = pred[-1]['wires']['score'][idx]
        line_ = []
        score_ = []

        for i in box:
            score_max = 0.0
            tmp = [[0.0, 0.0], [0.0, 0.0]]

            for j in range(len(line)):
                if (line[j][0][1] >= i[0] and line[j][1][1] >= i[0] and
                        line[j][0][1] <= i[2] and line[j][1][1] <= i[2] and
                        line[j][0][0] >= i[1] and line[j][1][0] >= i[1] and
                        line[j][0][0] <= i[3] and line[j][1][0] <= i[3]):

                    if score[j] > score_max:
                        tmp = line[j]
                        score_max = score[j]
            line_.append(tmp)
            score_.append(score_max)
        processed_list = torch.tensor(line_)
        pred[idx]['line'] = processed_list

        processed_s_list = torch.tensor(score_)
        pred[idx]['line_score'] = processed_s_list
    return pred


def predict(pt_path, model, img):
    model = load_best_model(model, pt_path, device)

    model.eval()

    if isinstance(img, str):
        img = Image.open(img).convert("RGB")

    transform = transforms.ToTensor()
    img_tensor = transform(img)

    with torch.no_grad():
        predictions = model([img_tensor.to(device)])
        # print(predictions)

    pred = box_line_(predictions)
    # print(f'pred:{pred[0]}')
    show_predict(img_tensor, pred, t_start)


if __name__ == '__main__':
    t_start = time.time()
    print(f'start to predict:{t_start}')
    model = linenet_resnet50_fpn().to(device)
    pt_path = r'D:\python\PycharmProjects\lcnn-master\lcnn_\20250212\MultiVisionModels\models\line_detect\linenet_wts\resnet50_best_e8.pth'
    img_path = f'D:\python\PycharmProjects\data2\images/train/2024-11-27-15-41-38_SaveImage.png'  # 工件图
    # img_path = f'D:\python\PycharmProjects\data\images/train/00558656_3.png'  # wireframe图
    predict(pt_path, model, img_path)
    t_end = time.time()
    print(f'predict used:{t_end - t_start}')