from tkinter import *
import os

creds = 'temp.temp'
credss = {}


def signUp():
    global windowSignIn
    global entryLogin
    global entryPswd
    windowSignIn = Tk()
    windowSignIn.title('Sign up')
    instruction = Label(windowSignIn, text='Please enter new credidentials\n')
    instruction.grid(row=0, column=0, sticky=E)

    labelLogin = Label(windowSignIn, text='New login: ')
    labelLogin.grid(row=1, column=0, sticky=W)
    labelPswd = Label(windowSignIn, text='New password: ')
    labelPswd.grid(row=2, column=0, sticky=W)

    entryLogin = Entry(windowSignIn)
    entryLogin.grid(row=1, column=1)
    entryPswd = Entry(windowSignIn, show='*')
    entryPswd.grid(row=1, column=1)

    buttonSign = Button(windowSignIn, text='Sign up', command=bSignup)
    buttonSign.grid(columnspan=2, sticky=W)
    windowSignIn.mainloop()


def bSignup():
    with open(creds, 'w') as f:
        f.write(entryLogin.get())
        f.write(':')
        f.write(entryPswd.get())
        f.write('\n')
        f.close()

    windowSignIn.destroy()
    logIn()


def logIn():
    global entryLoginL
    global entryPswdL
    global windowLogin

    windowLogin = Tk()
    windowLogin.title('Login')

    instruction = Label(windowLogin, text='Log in!\n')
    instruction.grid(sticky=E)
    labelLoginL = Label(windowLogin, text='Login: ')
    labelLoginL.grid(row=1, sticky=W)
    labelPswdL = Label(windowLogin, text='Password: ')
    labelPswdL.grid(row=2, sticky=W)

    entryLoginL = Entry(windowLogin)
    entryLoginL.grid(row=1, column=1)
    entryPswdL = Entry(windowLogin, show='*')
    entryPswdL.grid(row=2, column=1)

    buttonLog = Button(windowLogin, text='Login', command=checkLogin)
    buttonLog.grid(columnspan=2, sticky=W)

    logOutB = Button(windowLogin, text="Logout", command=logOut)
    logOutB.grid(columnspan=2, sticky=E)
    windowLogin.mainloop()


def checkLogin():
    with open(creds, 'r') as f:
        for line in f:
            user, pswd = line.strip().split(':')
            credss[user] = pswd

    username = entryLoginL.get()
    password = entryPswdL.get()
    r = Tk()
    r.title('Check')
    r.geometry('150x50')
    message = Label(r)
    if username in credss and credss[username] == password:
        message.configure(text="Logged in.")
        message.pack()
        r.mainloop()
    else:
        message.configure(text="Username and password don't match")
        message.pack()
        r.mainloop()


def logOut():
    windowLogin.destroy()
    signUp()