class LoginPage(tkinter.Frame,SquadBot):
    def __init__(self,master,controller):
        tkinter.Frame.__init__(self,master)
        # initialising inherited parent class
        self.createImages()
        # creating an array of images for the class to use

        crestlabel = tkinter.Label(self,image=self.images["bigcrest"],background=self.palette["bgblue"])
        crestlabel.place(x=350,y=0,anchor="n")
        # creating crest image in centre of page

        self.unamelabel = tkinter.Label(self,text="Username:",background=self.palette["bgblue"],font="TkDefaultFont 9 bold")
        self.unamelabel.place(x=250,y=375,anchor="nw")
        # creating a label to show where to enter the username to login
        self.usernamevar = tkinter.StringVar()
        self.usernamevar.trace_add("write", lambda x,y,z: self.change_text(var=self.usernamevar))
        self.unameentry = ttk.Entry(self,text = self.usernamevar)
        self.unameentry.place(x=350,y=395,anchor="n",width=200)
        # creating the text box for the user to enter their username

        pwordlabel = ttk.Label(self,text="Password:",background=self.palette["bgblue"],font="TkDefaultFont 9 bold")
        pwordlabel.place(x=250,y=420,anchor="nw")
        # creating a label to show the user where to enter their password
        self.passwordvar = tkinter.StringVar()
        self.passwordvar.trace_add("write", lambda x,y,z: self.change_text(var=self.passwordvar))
        self.pwordentry = ttk.Entry(self,show="•",text=self.passwordvar)
        self.pwordentry.place(x=350,y=440,anchor="n",width=200)
        # creating a text box for the user to enter their password
        # shows • instead of characters when the user types their password in to prevent people seeing their password

        loginbutton = ttk.Button(self,text="Login",command = lambda: self.login(controller))
        loginbutton.place(x=350,y=468,anchor="n")
        # creates a button that executes LoginPage.Login() with SquadBot as an argument

        self.configure(bg=self.palette["bgblue"])
        # setting background of frame to palette["bgblue"], which is the main background colour of the program

        #notbutton = tkinter.Button(self,text="test",command = lambda: self.shownot(controller))
        #notbutton.place(x=700,y=500,anchor="se")
        # <nf> TESTING NOTIFICATIONS

    def shownot(self,parent):
        window = Notification(self,parent)
        # <nf>  MORE NOTIFICATION TESTING

    def login(self,parent):
        username = self.unameentry.get()
        password = self.pwordentry.get()
        # retrieves username and password from the boxes,
        # and replaces any semicolons with a comma

        self.unameentry.delete(0,"end")
        self.pwordentry.delete(0,"end")
        # removes text from entry boxes, so that they are clear for when the user logs out

        data = (username,password)
        # creating tuple from entered data

        jsondata = json.dumps(data)
        # creating a JSON string from tuple

        sendingdata = "l" + jsondata
        # adding an "l" to the front - indicates it is a login request when the server parses it

        parent.conn.sendall(sendingdata.encode())
        # sends the string to the server

        print(sendingdata.encode()) # <nf>

        response = parent.conn.recv(1024).decode()
        # receives the response from the server

        if response[0] == "a":  # indicates accepted login
            fullresp = response[1:]
            # removes the 'a' from the front of the data so the rest of it can be decoded

            data = fullresp.split(",")
            # creates an array of strings from the data, splitting it at commas

            parent.userlvl.set(int(data[0]))
            # setting userlevel to set certain functions depending on different users

            parent.fullname = data[2]
            # setting the name of the user to allow better human-computer interaction

            print(parent.fullname)
            print("login successful")
            print(parent.getuserlvl())  # <nf>
            # receives the user data from the server


            parent.userid.set(int(data[1]))
            # sets the user id of the user
            requestdata = parent.conn.recv(1024)
            print(requestdata)
            requests = json.loads(requestdata)
            msg = "There have been responses to your requests:\n\n"
            if len(requests) >0:
                for i in requests:
                    msg += i[0]+":"+i[1]+"\n"
                notif = Notification(parent,msg)

            parent.welcomemessage.set("Welcome, {name}!".format(name=parent.fullname))
            # creates a welcome message that is displayed upon loggin in
            parent.showPage(MainPage,LoginPage)   # displaying main page, from which other pages can be reached

        elif response[0] == "p":    # password incorrect
            tkinter.messagebox.showerror("Error logging in","Password incorrect")
        elif response[0] == "u":    # user not found
            tkinter.messagebox.showerror("Error logging in","Username or password incorrect")