import json,time
username=[]
userpasswd=[]
def login_success_file(name):
    try:
        f=open(r"F:/login_success_syslog.txt",'a+')
        json.dump(time.ctime()+":"+name,f)
        f.write("\n")
    except FileNotFoundError as e:
        print(e)
def login_fail_file(name):
    try:
        f=open(r"F:\login_faild_syslog.txt",'a+')
        json.dump(time.ctime() + ":",name,f)
        f.write("\n")
    except FileNotFoundError as e:
        print(e)
def import_to_file():
    try:
        f1=open(r"F:\username",'w',encoding="utf-8")
        f2=open(r"F:\userpasswd",'w',encoding="utf-8")
        json.dump(username,f1)
        json.dump(userpasswd,f2)
        f1.close()
        f2.close()
    except FileNotFoundError as e:
        print(e)
    except Exception as e:
        print(e)
def export_from_file():
    global username
    global userpasswd
    try:
        f1=open(r"F:\username",'r',encoding="utf-8")
        f2=open(r"F:\userpasswd",'r',encoding="utf-8")
        username=json.load(f1)
        userpasswd=json.load(f2)
        f1.close()
        f2.close()
    except FileNotFoundError as e:
        print(e)
    except Exception as e:
        print(e)
def creat_user(name,passwd):
    export_from_file()
    if name in username:
        print("usernam has exist!")
        name=input("rewrite your username:")
        passswd=input("rewrite your userpassswd:")
        creat_user(name,passwd)
    else:
        username.append(name)
        userpasswd.append(passwd)
        return True
def authentication(name,passwd):
    export_from_file()
    if name in username:
        index=username.index(name)
        if passwd==userpasswd[index]:
            return True
        else:
            return False
    else:
        return False
def user_login_interface():
    function=input("登入輸入login，註冊輸入regist:")
    if function !="login" and function != "regist":
        print("輸入錯誤！")
        exit()
    name=input("username:")
    passwd=input("userpassswd:")
    if function=="login":
        if authentication(name,passwd)==True:
            login_success_file(name)
            print("login successfully!")
        else:
            login_fail_file(name)
            print("username or userpasswd error!")
    elif function=="regist":
        if creat_user(name,passwd)==True:
            import_to_file()
            print("regist sucessfully!")
user_login_interface()