def print_str_by_place(str, row, col):
    font = pygame.font.Font(None, 18)
    label = font.render(str, 1, black)
    screen.blit(label, (row, col))


def get_key():
    while 1:
        event = pygame.event.poll()
        if event.type == pygame.KEYDOWN:
            return event.key
        else:
            pass

pygame.init()
screen = pygame.display.set_mode((700, 700))
done = True
login = True
#sigh_up = False
user_name_p = False
password_p = False
username_lst = []
username = ""
password_lst = []
password = ""
row_u = 343
col_u = 260
while done:
    if login:
        img = pygame.image.load("LOGIN.png")
        screen.blit(img,(0,0))


        for event in pygame.event.get():
            if event.type == pygame.MOUSEBUTTONUP:
                mouse = pygame.mouse.get_pos()
                if if_button_pressed(255,418,331,355,mouse):      # if the username pressed
                    username_p = True
                    password_p = False

                elif if_button_pressed(255,418,382,403,mouse):      # if the password pressed
                    username_p = False
                    password_p = True

                elif if_button_pressed(520,675,615,666,mouse):     #if sigh up pressed
                    login = False
                    break
                else:
                    user_name_p = False
                    password_p = False

            if event.type == pygame.KEYDOWN:
                if user_name_p:
                    pygame.font.init()
                    key = get_key()
                    if key == pygame.K_BACKSPACE:
                      username = username[0:-1]
                    elif key == pygame.K_RETURN:
                      break
                    elif key <= 127:
                      username.append(chr(key))
                    username = username_lst.join("")
                    print_str_by_place(username,345,260)


            if event.type == pygame.QUIT:
                done = False
        pygame.display.update()

    else:
        img = pygame.image.load("sign_up.png")
        screen.blit(img,(0,0))
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                done = False

            if event.type == pygame.MOUSEBUTTONUP:
                mouse = pygame.mouse.get_pos()

                if if_button_pressed(21,230,621,680,mouse):      # if Back pressed
                    login = True
                    break
    pygame.display.update()


    # get string and print it by place
    def print_str_by_place(str, row, col):
        font = pygame.font.Font(None, 18)
        label = font.render(str, 1, black)
        screen.blit(label, (row, col))


    def get_key():
        while 1:
            event = pygame.event.poll()
            if event.type == pygame.KEYDOWN:
                return event.key
            else:
                pass

    pygame.init()
    screen = pygame.display.set_mode((700, 700))
    done = True
    login = True
    #sigh_up = False
    user_name_p = False
    password_p = False
    username_lst = []
    username = ""
    password_lst = []
    password = ""
    row_u = 343
    col_u = 260
    while done:
        if login:
            img = pygame.image.load("LOGIN.png")
            screen.blit(img,(0,0))


            for event in pygame.event.get():
                if event.type == pygame.MOUSEBUTTONUP:
                    mouse = pygame.mouse.get_pos()
                    if if_button_pressed(255,418,331,355,mouse):      # if the username pressed
                        username_p = True
                        password_p = False

                    elif if_button_pressed(255,418,382,403,mouse):      # if the password pressed
                        username_p = False
                        password_p = True

                    elif if_button_pressed(520,675,615,666,mouse):     #if sigh up pressed
                        login = False
                        break
                    else:
                        user_name_p = False
                        password_p = False

                if event.type == pygame.KEYDOWN:
                    if user_name_p:
                        pygame.font.init()
                        key = get_key()
                        if key == pygame.K_BACKSPACE:
                          username = username[0:-1]
                        elif key == pygame.K_RETURN:
                          break
                        elif key <= 127:
                          username.append(chr(key))
                        username = username_lst.join("")
                        print_str_by_place(username,345,260)


                if event.type == pygame.QUIT:
                    done = False
            pygame.display.update()

        else:
            img = pygame.image.load("sign_up.png")
            screen.blit(img,(0,0))
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    done = False

                if event.type == pygame.MOUSEBUTTONUP:
                    mouse = pygame.mouse.get_pos()

                    if if_button_pressed(21,230,621,680,mouse):      # if Back pressed
                        login = True
                        break
        pygame.display.update()