import subprocess
import tkinter as tk
import tkinter.messagebox as msgbox
import pickle
import threading

window = tk.Tk()
window.resizable(0, 0)        #让窗口大小不变
window.title("停车场信息管理系统")
# 窗口居中
ww, wh = 400, 250
sw, sh = window.winfo_screenwidth(), window.winfo_screenheight()
x, y = (sw - ww) / 2, (sh - wh) / 2
window.geometry("%dx%d+%d+%d" % (ww, wh, x, y))
# 欢迎使用
l_wlc = tk.Label(window, text="Welcome!", font=("Arial", 32))
l_wlc.pack()          #将标签添加到窗口
# 用户名标签框
l_usr = tk.Label(window, text="用户名：")
l_usr.place(x=65, y=100)
l_key = tk.Label(window, text="密码：")
l_key.place(x=65, y=140)
# 用户名输入框
var1 = tk.StringVar()
var2 = tk.StringVar()
e_usr = tk.Entry(window, textvariable=var1)
e_key = tk.Entry(window, textvariable=var2, show="*")
e_usr.place(x=145, y=100)
e_key.place(x=145, y=140)


# 多线程实现同时打开新窗口和关闭本窗口
def tuichu():
	window.quit()

def open_new():
	subprocess.run(["python", "mainWindow.py"])


# 登录
def login():
	t1 = threading.Thread(target=tuichu)
	#t1.daemon = 1
	t2 = threading.Thread(target=open_new)
	#t2.daemon = 1

	# 获得用户名字符串和密码字符串
	usr = var1.get()
	pwd = var2.get()
	# 登录前检查:判断输入框是否为空
	if usr != "":
		if pwd != "":
			# 将pickle内信息写入到listAll中
			listAll = []
			try:
				with open("administrators.pickle", "rb+") as fp:
					try:
						while True:
							temp = pickle.load(fp)
							listAll.append(temp)
					except EOFError:
						pass
			except FileNotFoundError:
				with open("administrators.pickle", "wb") as fp:
					pickle.dump(("admin", "admin"), fp)
			else:
				pass

			# 检查该管理用户是否在存档中，密码是否匹配
			for person in listAll:
				if person[0] == usr and person[1] == pwd:
					with open("record.txt", "w+") as file:
						file.write("这是一个用于存储登录用户的名字的临时文件\n"+usr)
					t1.start()
					t2.start()
					break
			else:
				msgbox.showerror(message="用户名或者密码错误！")
		else:
			msgbox.showerror("⚠", "请输入密码")
	else:
		msgbox.showerror("⚠", "请输入用户名")


btn_login = tk.Button(window, text="登录", width=8, command=login)
btn_login.place(x=145, y=190)
# 退出
btn_exit = tk.Button(window, text="退出", width=8, command=window.quit)
btn_exit.place(x=220, y=190)

window.mainloop()