# -*- coding: utf-8 -*-

import random
import string
import sys
import math
from PIL import Image,ImageDraw,ImageFont,ImageFilter

#字体的位置，不同版本的系统会有不同
font_path = r'‪C:\Windows\Fonts\arial.ttf'
#生成几位数的验证码
number = 4
#生成验证码图片的高度和宽度
size = (100,30)
#背景颜色，默认为白色
bgcolor = (255,255,255)
#字体颜色，默认为蓝色
fontcolor = (0,0,255)
#干扰线颜色。默认为红色
linecolor = (255,0,0)
#是否要加入干扰线
draw_line = True
#加入干扰线条数的上下限
line_number = (1,5)

#用来随机生成一个字符串
def gene_text():
    source = list(string.ascii_letters)
    for index in range(0, 10):
        source.append(str(index))
    return ''.join(random.sample(source, number))#number是生成验证码的位数
#用来绘制干扰线
def gene_line(draw,width,height):
    begin = (random.randint(0, width), random.randint(0, height))
    end = (random.randint(0, width), random.randint(0, height))
    draw.line([begin, end], fill=linecolor)

#生成验证码
def gene_code():
    width,height = size #宽和高
    image = Image.new('RGBA',(width,height),bgcolor) #创建图片
    font = ImageFont.truetype(font_path,25) #验证码的字体
    draw = ImageDraw.Draw(image)  #创建画笔
    text = gene_text() #生成字符串
    # print(text)
    font_width, font_height = font.getsize(text)
    draw.text(((width - font_width) / number, (height - font_height) / number),text,\
            font=font, fill=fontcolor) #填充字符串
    if draw_line:
        gene_line(draw,width,height)
    # image = image.transform((width+30,height+10), Image.AFFINE, (1,-0.3,0,-0.1,1,0),Image.BILINEAR)  #创建扭曲
    image = image.transform((width+20, height+10), Image.AFFINE, (1,-0.3,0,-0.1,1,0),Image.BILINEAR)  #创建扭曲
    image = image.filter(ImageFilter.EDGE_ENHANCE_MORE) #滤镜，边界加强
    image.save('D:\\pythontest\\xpathtest\\idencode.png') #保存验证码图片
    return text
if __name__ == "__main__":
    text = gene_code()
    print(text)