use crate::CoreApi;
use glib::Object;
use gtk::{glib, prelude::*, subclass::prelude::*};
use kifu_core::{
    ui::{HomeView, PlayerElement},
    CoreRequest, CreateGameRequest, HotseatPlayerRequest, PlayerInfoRequest,
};
use std::{cell::RefCell, rc::Rc};

struct PlayerDataEntryPrivate {
    name: gtk::Text,
    rank: gtk::DropDown,
}

impl Default for PlayerDataEntryPrivate {
    fn default() -> Self {
        let rank = gtk::DropDown::builder().build();
        Self {
            name: gtk::Text::builder().build(),
            rank,
        }
    }
}

#[glib::object_subclass]
impl ObjectSubclass for PlayerDataEntryPrivate {
    const NAME: &'static str = "PlayerDataEntry";
    type Type = PlayerDataEntry;
    type ParentType = gtk::Box;
}

impl ObjectImpl for PlayerDataEntryPrivate {}
impl WidgetImpl for PlayerDataEntryPrivate {}
impl BoxImpl for PlayerDataEntryPrivate {}

glib::wrapper! {
    struct PlayerDataEntry(ObjectSubclass<PlayerDataEntryPrivate>) @extends gtk::Box, gtk::Widget;
}

impl PlayerDataEntry {
    pub fn new(element: PlayerElement) -> PlayerDataEntry {
        let s: Self = Object::builder().build();

        let rank_model = gio::ListStore::new(gtk::StringObject::static_type());
        s.imp().rank.set_model(Some(&rank_model));

        match element {
            PlayerElement::Hotseat(player) => {
                if let Some(placeholder) = player.placeholder {
                    s.imp().name.set_placeholder_text(Some(&placeholder));
                }
                player.ranks.iter().for_each(|rank| rank_model.append(&gtk::StringObject::new(rank)));
            }
            // PlayerElement::Remote(_) => s.imp().placeholder.set_text("remote player"),
            // PlayerElement::Bot(_) => s.imp().placeholder.set_text("bot player"),
        }

        s.append(&s.imp().name);
        s.append(&s.imp().rank);

        s
    }

    pub fn text(&self) -> String {
        let name = self.imp().name.buffer().text().to_string();
        if name.is_empty() {
            self.imp()
                .name
                .placeholder_text()
                .map(|s| s.to_string())
                .unwrap_or("".to_owned())
        } else {
            name
        }
    }

    pub fn rank(&self) -> Option<String> {
        self.imp().rank.selected_item().and_then(|obj| {
            let str_obj = obj.downcast::<gtk::StringObject>().ok()?;
            Some(str_obj.string().clone().to_string())
        })
    }
}

pub struct HomePrivate {
    black_player: Rc<RefCell<Option<PlayerDataEntry>>>,
    white_player: Rc<RefCell<Option<PlayerDataEntry>>>,
}

impl Default for HomePrivate {
    fn default() -> Self {
        Self {
            black_player: Rc::new(RefCell::new(None)),
            white_player: Rc::new(RefCell::new(None)),
        }
    }
}

#[glib::object_subclass]
impl ObjectSubclass for HomePrivate {
    const NAME: &'static str = "Home";
    type Type = Home;
    type ParentType = gtk::Grid;
}

impl ObjectImpl for HomePrivate {}
impl WidgetImpl for HomePrivate {}
impl GridImpl for HomePrivate {}

glib::wrapper! {
    pub struct Home(ObjectSubclass<HomePrivate>) @extends gtk::Grid, gtk::Widget;
}

impl Home {
    pub fn new(api: CoreApi, view: HomeView) -> Home {
        let s: Self = Object::builder().build();

        let black_player = PlayerDataEntry::new(view.black_player);
        s.attach(&black_player, 1, 1, 1, 1);
        *s.imp().black_player.borrow_mut() = Some(black_player.clone());

        let white_player = PlayerDataEntry::new(view.white_player);
        s.attach(&white_player, 2, 1, 1, 1);
        *s.imp().white_player.borrow_mut() = Some(white_player.clone());

        let new_game_button = gtk::Button::builder().label(&view.start_game.label).build();
        s.attach(&new_game_button, 2, 2, 1, 1);

        new_game_button.connect_clicked({
            move |_| {
                let black_player = black_player.clone();
                let white_player = white_player.clone();

                api.dispatch(CoreRequest::CreateGame(CreateGameRequest {
                    black_player: player_info(black_player.clone()),
                    white_player: player_info(white_player.clone()),
                }));
            }
        });

        s
    }
}

fn player_info(player: PlayerDataEntry) -> PlayerInfoRequest {
    PlayerInfoRequest::Hotseat(HotseatPlayerRequest {
        name: player.text(),
        rank: player.rank(),
    })
}