use godot::{
    classes::{Button, IPanel, OptionButton, Panel, TextEdit, VBoxContainer},
    prelude::*,
};

use crate::{
    game_manager::{Game, GameManager, GameOptions},
    net::network_manager::{NetworkManager, Package, PeerKind},
    ui::player_listing::PlayerListing,
};

#[derive(GodotClass)]
#[class(base=Panel, init)]
pub struct LobbyPanel {
    #[export]
    players_list: Option<Gd<VBoxContainer>>,
    #[export]
    name_field: Option<Gd<TextEdit>>,
    #[export]
    player_listing_prefab: Option<Gd<PackedScene>>,
    #[export]
    ready_button: Option<Gd<Button>>,
    #[export]
    map_selection: Option<Gd<OptionButton>>,

    is_ready: bool,

    base: Base<Panel>,
}

#[godot_api]
impl IPanel for LobbyPanel {
    fn ready(&mut self) {
        GameManager::singleton()
            .signals()
            .on_new_player()
            .connect_other(self, |s, _| s.update_players(true));
        GameManager::singleton()
            .signals()
            .on_player_disconnected()
            .connect_other(self, |s, _| s.update_players(true));
        GameManager::singleton()
            .signals()
            .on_players_updated()
            .connect_other(self, |s| s.update_players(false));
        GameManager::singleton()
            .signals()
            .on_map_changed()
            .connect_other(self, |s, id| s.update_map_selection(id));

        if let Some(ready_button) = &self.ready_button {
            ready_button
                .signals()
                .pressed()
                .connect_other(self, |s| s.on_ready());
        }
        if let Some(map_selection) = &self.map_selection {
            map_selection
                .signals()
                .item_selected()
                .connect_other(self, |s, id| {
                    s.update_map_selection(id as u8);
                });
        }

        if let Some(game) = Game::singleton() {
            if let Some(map_selection) = &mut self.map_selection {
                for map in game.bind().maps.iter_shared() {
                    map_selection.add_item(&map.bind().name);
                }
                map_selection.select(0);
            }
            let is_host = if let Some(peer) = &NetworkManager::singleton().bind().peer {
                peer.is_host()
            } else {
                false
            };
            self.on_game_opts_update(&game.bind().opts, is_host);
        }
        self.update_map_selection(0);

        if let Some(name_field) = &self.name_field {
            name_field
                .signals()
                .text_changed()
                .connect_other(self, |s| {
                    if let Some(name_field) = &s.name_field {
                        if let Some(game) = &mut Game::singleton() {
                            let player_id = game.bind().self_id;
                            if let Some(player_id) = player_id {
                                game.bind_mut().update_player_nick(
                                    player_id,
                                    name_field.get_text().to_string(),
                                );
                            }
                        }

                        NetworkManager::singleton()
                            .bind_mut()
                            .update_nick(name_field.get_text().to_string());
                    }
                });
        }

        self.update_players(true);

        if let Some(peer) = &NetworkManager::singleton().bind().peer
            && peer.is_host()
        {
            if let Some(button) = &mut self.ready_button {
                button.set_text("Start Game");
                button.set_disabled(true);
            }
        }
        self.update_ready_button();
    }
}

impl LobbyPanel {
    fn on_game_opts_update(&mut self, opts: &GameOptions, is_host: bool) {
        if let Some(selection) = &mut self.map_selection {
            selection.set_disabled(!is_host && !opts.allow_any_map);
        }
    }

    fn update_ready_button(&mut self) {
        if let Some(game) = Game::singleton()
            && let Some(peer) = &NetworkManager::singleton().bind().peer
        {
            if let PeerKind::Server(_, _) = peer
                && let Some(button) = &mut self.ready_button
            {
                let all_ready = game.bind().players.iter().all(|p| p.ready);
                button.set_disabled(!all_ready);
            }
        }
    }

    pub fn update_players(&mut self, replace: bool) {
        self.update_ready_button();

        if let Some(list) = &mut self.players_list {
            if replace {
                for child in list.get_children().iter_shared() {
                    list.remove_child(&child);
                }
                if let Some(game) = &Game::singleton() {
                    if let Some(prefab) = &self.player_listing_prefab {
                        for player in &game.bind().players {
                            if let Some(node) = prefab.instantiate() {
                                let mut listing = node.cast::<PlayerListing>();
                                listing.bind_mut().player_id = Some(player.id());
                                listing.bind_mut().update_teams(game.bind().get_teams());
                                listing.bind_mut().update();
                                list.add_child(&listing);
                            }
                        }
                    }
                }
            } else {
                for child in list.get_children().iter_shared() {
                    let mut listing = child.cast::<PlayerListing>();
                    if let Some(game) = Game::singleton() {
                        listing.bind_mut().update_teams(game.bind().get_teams());
                    }
                    listing.bind_mut().update();
                }
            }
        }
    }

    pub fn on_ready(&mut self) {
        let is_host = if let Some(peer) = &NetworkManager::singleton().bind().peer {
            peer.is_host()
        } else {
            false
        };
        if !is_host {
            self.is_ready = !self.is_ready;
            if let Some(button) = &mut self.ready_button {
                if self.is_ready {
                    button.set_text("Ready");
                } else {
                    button.set_text("Not Ready");
                }
            }

            if let Some(peer) = &mut NetworkManager::singleton().bind_mut().peer {
                if let PeerKind::Client(peer, socket_addr) = peer {
                    peer.send_reliable(&socket_addr, Package::SetReady(0, self.is_ready));
                }
            }
        } else {
            if let Some(game) = &mut Game::singleton() {
                game.bind_mut().start_game();
            }
        }
    }

    pub fn update_map_selection(&mut self, idx: u8) {
        if let Some(peer) = &mut NetworkManager::singleton().bind_mut().peer {
            match peer {
                PeerKind::Client(peer, addr) => {
                    if let Some(map_selection) = &mut self.map_selection {
                        map_selection.select(idx as i32);
                        self.run_deferred(|s| s.update_players(false));
                        peer.send_reliable(addr, Package::SelectMap(idx));
                    }
                }
                PeerKind::Server(peer, _) => {
                    if let Some(game) = &mut Game::singleton() {
                        game.bind_mut().change_map_selection(idx, false);
                    }
                    self.run_deferred(|s| s.update_players(false));
                    peer.broadcast_reliable(Package::SelectMap(idx));
                }
            }
        }
    }
}