# coding: utf-8
import typing
from tkinter import Tk
from tkinter import Button
from tkinter import YES
from tkinter import StringVar
from tkinter import OptionMenu
from tkinter import W
from tkinter.ttk import Combobox
from tkinter.ttk import Treeview

from synergine2.config import Config

from opencombat.gui import Gui
from opencombat.strategy.team.stash import TeamStash


class SelectTroopsGui(Gui):
    def __init__(
        self,
        config: Config,
        master: Tk,
        team_stash: TeamStash,
        countries: typing.List[str],
    ) -> None:
        super().__init__(config, master)
        self._master.title('Troops selection')
        self._team_stash = team_stash
        self._countries_troops = {}  # type: typing.Dict[str, typing.List[TeamModel]]  # nopep8

        # Widgets
        self._selected_country_var = StringVar(self._master)
        self._selected_country_var.set(countries[0])
        self._selected_country_var.trace('w', self._country_changed)
        self._select_country_menu = OptionMenu(
            self._master,
            self._selected_country_var,
            *countries,
        )

        self._teams_var = StringVar(self._master)
        self._teams_list = Combobox(
            self._master,
            height=10,
            state='readonly',
            textvariable=self._teams_var,
        )

        self._add_troop_var = StringVar(self._master)
        self._add_troop_button = Button(
            self._master,
            textvariable=self._add_troop_var,
            command=self._add_troop,
        )
        self._add_troop_var.set('Add troop')

        self._troops_view = Treeview(
            self._master,
            columns=('Soldiers',),
            height=10,
        )
        self._troops_view.heading('#0', text='Team')
        self._troops_view.heading('#1', text='Soldiers')
        self._troops_view.column('#0', stretch=YES)
        self._troops_view.column('#1', stretch=YES)

        # Layout
        self._select_country_menu.grid(row=0, column=0, sticky=W)
        self._teams_list.grid(row=1, column=0, sticky=W)
        self._add_troop_button.grid(row=2, column=0, sticky=W)
        self._troops_view.grid(row=3, column=0, sticky=W)

        # Default behaviours
        self._selected_country_var.set(countries[0])
        self._country_changed()

    def _country_changed(self, *args, **kwargs) -> None:
        country = self._selected_country_var.get()

        self._logger.info('Change country to "{}"'.format(
            country,
        ))
        country_team_names = [
            t.name for
            t in self._team_stash.get_team_by_country(
                self._selected_country_var.get(),
            )
        ]

        self._logger.debug('Change teams for: "{}"'.format(country_team_names))
        self._teams_list['values'] = country_team_names
        self._teams_var.set(country_team_names[0])
        self._update_troops_view(country)

    def _add_troop(self, *args, **kwargs) -> None:
        if self._teams_var.get():
            country = self._selected_country_var.get()
            team_name = self._teams_var.get()

            self._logger.info('Add troop "{}" to country "{}" troops'.format(
                team_name,
                team_name,
            ))

            team_model = self._team_stash.get_team_by_name(
                team_name=team_name,
                team_country=country,
            )
            self._countries_troops.setdefault(country, []).append(
                team_model,
            )
            self._update_troops_view(country)

    def _update_troops_view(self, country: str) -> None:
        teams = self._countries_troops.get(country, [])

        self._troops_view.delete(*self._troops_view.get_children())
        for team in teams:
            self._troops_view.insert(
                '',
                'end',
                text=team.name,
                values=('o' * len(team.units,))
            )