#-*-coding:utf-8-*-
# date:2021-04-5
# Author: Eric.Lee
# function: Inference

import os
import argparse
import torch
import torch.nn as nn
import numpy as np

import time
import datetime
import os
import math
from datetime import datetime
import cv2
import torch.nn.functional as F

from models.resnet import resnet50, resnet34
from models.squeezenet import squeezenet1_1,squeezenet1_0
from utils.common_utils import *
import copy
from hand_data_iter.datasets import draw_bd_handpose


if __name__ == "__main__":

    parser = argparse.ArgumentParser(description=' Project Hand Pose Inference')

    parser.add_argument('--model_path', type=str, default = './model_exp/2021-02-21_23-25-14/model_epoch-2.pth',
        help = 'model_path') # 模型路径
    parser.add_argument('--model', type=str, default = 'resnet_50',
        help = 'model : resnet_x,squeezenet_x') # 模型类型
    parser.add_argument('--num_classes', type=int , default = 42,
        help = 'num_classes') #  手部21关键点， (x,y)*2 = 42
    parser.add_argument('--GPUS', type=str, default = '0',
        help = 'GPUS') # GPU选择
    parser.add_argument('--test_path', type=str, default = './image/',
        help = 'test_path') # 测试图片路径
    parser.add_argument('--img_size', type=tuple , default = (256,256),
        help = 'img_size') # 输入模型图片尺寸
    parser.add_argument('--vis', type=bool , default = True,
        help = 'vis') # 是否可视化图片

    print('\n/******************* {} ******************/\n'.format(parser.description))
    #--------------------------------------------------------------------------
    ops = parser.parse_args()# 解析添加参数
    #--------------------------------------------------------------------------
    print('----------------------------------')

    unparsed = vars(ops) # parse_args()方法的返回值为namespace，用vars()内建函数化为字典
    for key in unparsed.keys():
        print('{} : {}'.format(key,unparsed[key]))

    #---------------------------------------------------------------------------
    os.environ['CUDA_VISIBLE_DEVICES'] = ops.GPUS

    test_path =  ops.test_path # 测试图片文件夹路径

    #---------------------------------------------------------------- 构建模型
    print('use model : %s'%(ops.model))

    if ops.model == 'resnet_50':
        model_ = resnet50(num_classes = ops.num_classes,img_size=ops.img_size[0])
    elif ops.model == 'resnet_34':
        model_ = resnet34(num_classes = ops.num_classes,img_size=ops.img_size[0])
    elif ops.model == "squeezenet1_0":
        model_ = squeezenet1_0(num_classes=ops.num_classes)
    elif ops.model == "squeezenet1_1":
        model_ = squeezenet1_1(num_classes=ops.num_classes)

    use_cuda = torch.cuda.is_available()

    device = torch.device("cuda:0" if use_cuda else "cpu")
    model_ = model_.to(device)
    model_.eval() # 设置为前向推断模式

    # print(model_)# 打印模型结构

    # 加载测试模型
    if os.access(ops.model_path,os.F_OK):# checkpoint
        chkpt = torch.load(ops.model_path, map_location=device)
        model_.load_state_dict(chkpt)
        print('load test model : {}'.format(ops.model_path))

    #---------------------------------------------------------------- 预测图片
    '''建议 检测手bbox后，crop手图片的预处理方式：
    # img 为原图
    x_min,y_min,x_max,y_max,score = bbox
    w_ = max(abs(x_max-x_min),abs(y_max-y_min))

    w_ = w_*1.1

    x_mid = (x_max+x_min)/2
    y_mid = (y_max+y_min)/2

    x1,y1,x2,y2 = int(x_mid-w_/2),int(y_mid-w_/2),int(x_mid+w_/2),int(y_mid+w_/2)

    x1 = np.clip(x1,0,img.shape[1]-1)
    x2 = np.clip(x2,0,img.shape[1]-1)

    y1 = np.clip(y1,0,img.shape[0]-1)
    y2 = np.clip(y2,0,img.shape[0]-1)
    '''
    with torch.no_grad():
        idx = 0
        for file in os.listdir(ops.test_path):
            if '.jpg' not in file:
                continue
            idx += 1
            print('{}) image : {}'.format(idx,file))
            img = cv2.imread(ops.test_path + file)
            img_width = img.shape[1]
            img_height = img.shape[0]
            # 输入图片预处理
            img_ = cv2.resize(img, (ops.img_size[1],ops.img_size[0]), interpolation = cv2.INTER_CUBIC)
            img_ = img_.astype(np.float32)
            img_ = (img_-128.)/256.

            img_ = img_.transpose(2, 0, 1)
            img_ = torch.from_numpy(img_)
            img_ = img_.unsqueeze_(0)

            if use_cuda:
                img_ = img_.cuda()  # (bs, 3, h, w)
            pre_ = model_(img_.float()) # 模型推理
            output = pre_.cpu().detach().numpy()
            output = np.squeeze(output)

            pts_hand = {} #构建关键点连线可视化结构
            for i in range(int(output.shape[0]/2)):
                x = (output[i*2+0]*float(img_width))
                y = (output[i*2+1]*float(img_height))

                pts_hand[str(i)] = {}
                pts_hand[str(i)] = {
                    "x":x,
                    "y":y,
                    }
            draw_bd_handpose(img,pts_hand,0,0) # 绘制关键点连线

            #------------- 绘制关键点
            for i in range(int(output.shape[0]/2)):
                x = (output[i*2+0]*float(img_width))
                y = (output[i*2+1]*float(img_height))

                cv2.circle(img, (int(x),int(y)), 3, (255,50,60),-1)
                cv2.circle(img, (int(x),int(y)), 1, (255,150,180),-1)

            if ops.vis:
                cv2.namedWindow('image',0)
                cv2.imshow('image',img)
                if cv2.waitKey(600) == 27 :
                    break

    cv2.destroyAllWindows()

    print('well done ')