from threading import Thread

from asciimatics.widgets import Layout, Label, Text, TextBox, Widget

from ...utils import defer, http_patch, http_get
from ..CeoFrame import CeoFrame


class SetForwardingAddressesView(CeoFrame):
    def __init__(self, screen, width, height, model):
        super().__init__(
            screen, height, width, model, 'SetForwardingAddresses',
            save_data=True,
        )
        self._username_changed = False

        layout = Layout([100], fill_frame=True)
        self.add_layout(layout)
        self._username = Text(
            "Username:", "uid",
            on_change=self._on_username_change,
            on_blur=self._on_username_blur,
        )
        layout.add_widget(self._username)
        self._forwarding_addresses = TextBox(
            Widget.FILL_FRAME, 'Forwarding addresses:', 'forwarding_addresses',
            line_wrap=True)
        layout.add_widget(self._forwarding_addresses)
        layout.add_widget(Label('Press <TAB> to switch widgets'))
        
        self.add_flash_message_layout()
        self.add_buttons(
            back_btn=True,
            next_scene='Confirm', on_next=self._next)
        self.fix()

    # TODO: deduplicate this from AddUserView
    def _on_username_change(self):
        self._username_changed = True

    def _on_username_blur(self):
        if not self._username_changed:
            return
        self._username_changed = False
        username = self._username.value
        if username == '':
            return
        Thread(target=self._get_user_info, args=[username]).start()

    def _get_user_info(self, username):
        self.flash_message('Looking up user...')
        try:
            resp = http_get('/api/members/' + username)
            if resp.status_code != 200:
                return
            data = resp.json()
            if 'forwarding_addresses' not in data:
                return
            self._forwarding_addresses.value = data['forwarding_addresses']
        finally:
            self.clear_flash_message()

    def _next(self):
        uid = self._username.value
        forwarding_addresses = self._forwarding_addresses.value
        body = {'forwarding_addresses': forwarding_addresses}
        self._model.deferred_req = defer(
            http_patch, f'/api/members/{uid}', json=body)
        self._model.confirm_lines = [
            f"{uid}'s forwarding addresses will be set to:",
            '',
            *forwarding_addresses,
            '',
            'Are you sure you want to continue?',
        ]
        self._model.operations = ['replace_forwarding_addresses']