import os
import re
from glob import glob

import cv2
import numpy as np

from click_captcha.inference_equation_denoise import denoise
from click_captcha.model import crnn_ctc_equation, ctc_decode, crnn_ctc_equation_large, crnn_ctc_equation_less, \
    crnn_ctc_equation_loss
from click_captcha.pre_process import eight_neighbour, connected_component, add_contrast
from click_captcha.utils import pil_resize

image_shape = (32, 192, 1)
weights_path = "./models/e55-loss0.14-equation.h5"
project_dir = os.path.dirname(os.path.abspath(__file__)) + "/../"
model = crnn_ctc_equation_loss(input_shape=image_shape, class_num=35+2, is_train=False)
model.load_weights(weights_path)


def recognize(image_path):
    X = []
    img = cv2.imread(image_path)

    img = pil_resize(img, image_shape[0], image_shape[1])
    # cv2.imshow("img", img)
    img = denoise(img)
    # cv2.imshow("denoise", img)
    img = add_contrast(img)
    if img.shape[2] == 3:
        img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
        img = np.expand_dims(img, axis=-1)
    # _, img = cv2.threshold(img, 110, 255, cv2.THRESH_BINARY)

    # cv2.imshow("contrast", img)
    # gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    # gray = eight_neighbour(gray, 4)
    # cv2.imshow("eight_neighbour", gray)
    # img2 = connected_component(gray)
    # cv2.imshow("connected_component", img2)

    # img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    # img = np.expand_dims(img, axis=-1)
    img = img / 255.
    X.append(img)

    X = np.array(X)
    pred = ctc_decode(X, model)
    print(image_path)
    pred = pred[0][0]

    with open(project_dir + "data/equation.txt", 'r') as f:
        char_list = f.readlines()
    char_str = "".join(char_list)
    char_str = re.sub("\n", "", char_str)
    result_list = []
    for index in pred:
        index = int(index-1)
        # index = int(index)
        if index < 0:
            continue
        # print(char_str[index])
        result_list.append(char_str[index])

    print(result_list)
    label = image_path.split("_")[-1].split(".")[0]
    pred = calculate(result_list)
    print("计算结果：", pred, label)
    # cv2.waitKey(0)
    if pred is None:
        return 0
    if int(label) == int(pred):
        return 1
    else:
        return 0


def calculate1(_list):
    char_dict = {
        "1": 1,
        "2": 2,
        "3": 3,
        "4": 4,
        "5": 5,
        "6": 6,
        "7": 7,
        "8": 8,
        "9": 9,
        "0": 0,
        "一": 1,
        "二": 2,
        "三": 3,
        "四": 4,
        "五": 5,
        "六": 6,
        "七": 7,
        "八": 8,
        "九": 9,
        "零": 0,
        "加": "加",
        "减": "减",
        "乘": "乘",
        "除": "除",
        "+": "加",
        "-": "减",
        "*": "乘",
        "×": "乘",
        "/": "除",
        "÷": "除",
        "=": "",
        "?": "",
        "上": "",
        "去": "",
        "以": "",
    }
    equation_str = ""
    for c in _list:
        equation_str += str(char_dict.get(c))
    op = re.findall("加|减|乘|除", equation_str)
    op = list(set(op))
    if len(op) != 1:
        return None
    nums = re.split("加|减|乘|除", equation_str)
    if len(nums) != 2:
        return None
    try:
        num1 = int(nums[0])
        num2 = int(nums[1])
    except:
        print("非数字！")
        return None

    op = op[0]
    if op == "加":
        result = num1 + num2
    elif op == '减':
        result = num1 - num2
    elif op == '乘':
        result = num1 * num2
    elif op == '除':
        result = int(num1 / max(num2, 1))
    return result


def calculate(_list):
    char_dict = {
        "1": 1,
        "2": 2,
        "3": 3,
        "4": 4,
        "5": 5,
        "6": 6,
        "7": 7,
        "8": 8,
        "9": 9,
        "0": 0,
        "一": 1,
        "二": 2,
        "三": 3,
        "四": 4,
        "五": 5,
        "六": 6,
        "七": 7,
        "八": 8,
        "九": 9,
        "零": 0,
        "加": "加",
        "减": "减",
        "乘": "乘",
        "除": "除",
        "+": "加",
        "-": "减",
        "*": "乘",
        "×": "乘",
        "/": "除",
        "÷": "除",
        "=": "",
        "?": "",
        "上": "",
        "去": "",
        "以": "",
    }
    equation_str = ""
    for c in _list:
        equation_str += str(char_dict.get(c))
    op = re.findall("加|减|乘|除", equation_str)
    op = list(set(op))
    if len(op) != 1:
        return None
    nums = re.split("加|减|乘|除", equation_str)
    if len(nums) != 2:
        return None
    try:
        num1 = int(nums[0])
        num2 = int(nums[1])
    except:
        print("非数字！")
        return None

    op = op[0]
    if op == "加":
        result = num1 + num2
    elif op == '减':
        result = num1 - num2
    elif op == '乘':
        result = num1 * num2
    elif op == '除':
        result = int(num1 / max(num2, 1))
    return result


if __name__ == "__main__":
    # _path = "../data/test/char_9.jpg"
    # _path = "../data/equation/38376_减_1_问_加_4_除.jpg"
    _paths = glob("../data/test/FileInfo1021/*")
    right_num = 0
    for _path in _paths:
        r = recognize(_path)
        if r:
            right_num += 1
    print("准确率：", right_num / len(_paths), right_num, len(_paths))