import toga
from toga.style import Pack
from toga.style.pack import COLUMN, ROW, END, START, CENTER, HIDDEN, JUSTIFY
# from justgetit.constants import SCREENHEIGHT, SCREENWIDTH
import asyncio
from justgetit.constants import *
import httpx
from justgetit.basepage import BasePage


class Login(BasePage): 

    def __init__(self, *args, **kwargs):
        """
        This page allows the user to login
        Login details will be kept for a week after the user last uses this app
        
        :param self: login-screen
        :param args: args for super
        :param kwargs: kwars for super
        """
        # set button and image
        self.first_menu_button_icon = 'register'
        self.first_menu_button_callback = self.goto_registration
        self.page_pngimage = 'login'

        super().__init__(*args, **kwargs)

        # Name input
        self.name_input = toga.TextInput(
            placeholder="Could be you here",
            style=Pack(
                width=250,
                margin_bottom=10
            )
        )
        # Password input
        self.password_input = toga.PasswordInput(
            placeholder="Feeling lucky?",
            style=Pack(
                width=250,
                margin_bottom=20
            )
        )
        # Save button
        save_button = toga.Button(
            icon=toga.Icon("images/save"),
            style=Pack(
                width=50,
                margin=10,
            ),
            on_press=self.login_button_pressed)
        
        save_button_box= toga.Column(
            children=[save_button],
            style=Pack(
                flex=1,
                align_items=START,
                margin=20
            )
        )


        # wrapping up the windows elements
        self.content_box.add(self.name_input)
        self.content_box.add(self.password_input)
        self.content_box.add(save_button_box)

    async def login_button_pressed(self, widget):
        self.result = 0
        self.message = ''
        user = self.name_input.value
        pwd = self.password_input.value

        if len(user)>0 and len(pwd)>0:
            data = {'user': user, 'password': pwd}
            try:
                async with httpx.AsyncClient() as client:
                    response = await client.post(API+'/login', data=data)
                payload = response.json()
                print(payload)
                self.result = int(payload['status'])
                if 'message' in payload:
                    self.message = payload['message']
            except httpx.RequestError as exc:
                self.result = -2

            if self.result == 1:
                # store login etc in config
                self.app.configuration.store_login(user, pwd)
                # goto lists screen
                self.app.goto_next_page_by_name(PAGE_LISTS)
            else:
                await self.app.main_window.dialog(
                    toga.InfoDialog("Login error", self.message)            
                )
    def goto_registration(self, dummy):
        self.app.goto_next_page_by_name(PAGE_REGISTER)