// Copyright 2015 Matthew Collins
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::rc::Rc;

use ui;
use render;

pub struct Login {
    elements: Option<UIElements>,
}

struct UIElements {
    logo: ui::logo::Logo,
    elements: ui::Collection,
}


impl Login {
    pub fn new() -> Login {
        Login { elements: None }
    }
}

impl super::Screen for Login {
    fn on_active(&mut self, renderer: &mut render::Renderer, ui_container: &mut ui::Container) {
        let logo = ui::logo::Logo::new(renderer.resources.clone(), renderer, ui_container);
        let mut elements = ui::Collection::new();

		// Login
        let (mut login, mut txt) = super::new_button_text(renderer,
                                                          "Login",
                                                          0.0,
                                                          100.0,
                                                          400.0,
                                                          40.0);
        login.set_v_attach(ui::VAttach::Middle);
        login.set_h_attach(ui::HAttach::Center);
        let re = ui_container.add(login);
        txt.set_parent(&re);
        let tre = ui_container.add(txt);
        super::button_action(ui_container,
                             re.clone(),
                             Some(tre.clone()),
                             Some(Rc::new(|game, _| {
                                 game.screen_sys
                                     .replace_screen(Box::new(super::ServerList::new(None)));
                             })));
        elements.add(re);
        elements.add(tre);

		// Disclaimer
        let mut warn = ui::Text::new(renderer,
                                     "Not affiliated with Mojang/Minecraft",
                                     5.0,
                                     5.0,
                                     255,
                                     200,
                                     200);
        warn.set_v_attach(ui::VAttach::Bottom);
        warn.set_h_attach(ui::HAttach::Right);
        elements.add(ui_container.add(warn));

        self.elements = Some(UIElements {
            logo: logo,
            elements: elements,
        });
    }
    fn on_deactive(&mut self, _renderer: &mut render::Renderer, ui_container: &mut ui::Container) {
		// Clean up
        {
            let elements = self.elements.as_mut().unwrap();
            elements.logo.remove(ui_container);
            elements.elements.remove_all(ui_container);
        }
        self.elements = None
    }

    fn tick(&mut self,
            delta: f64,
            renderer: &mut render::Renderer,
            ui_container: &mut ui::Container) {
        let elements = self.elements.as_mut().unwrap();

        elements.logo.tick(renderer, ui_container);
    }
}