use crate::game::*;
use crate::user_handler::*;
use crate::AppState;
use crate::DmUserMethod::*;
use crate::GameHandlerMessage::*;
use crate::SendUserMessage::*;
use crate::UserHandlerMessage::*;
use lib::*;
use std::{
    net::SocketAddr,
    sync::{Arc, RwLock},
};

/// For interacting with the game handler
pub enum GameHandlerMessage {
    NewGame(NewGameRequest, SocketAddr),
    JoinGame(String, SocketAddr),
    MoveRequest(PlayerMoveRequest, SocketAddr),
    JudgeDecision(JudgeDecisionRequest, SocketAddr),
    DeleteGame(GameDeleteRequest),
}

/// Handles game stuff
pub struct GameHandler {
    /// Global state pointer
    state: Arc<AppState>,
}

impl GameHandler {
    /// Returns a new game handler
    pub fn new(state: Arc<AppState>) -> Self {
        GameHandler { state }
    }

    /// Handles incoming messages
    pub async fn handle(&self, message: GameHandlerMessage) {
        match message {
            NewGame(request, addr) => self.create_new_game(request, addr).await,
            JoinGame(request, addr) => self.join_game(request, addr).await,
            MoveRequest(request, addr) => self.handle_player_move(request, addr).await,
            JudgeDecision(request, addr) => self.handle_judging(request, addr).await,
            DeleteGame(request) => self.delete_game(request).await,
        }
    }

    /// Delete game
    async fn delete_game(&self, request: GameDeleteRequest) {
        // TODO: add auth lol
        let _ = self
            .state
            .games
            .write()
            .unwrap()
            .remove(&request.delete_game_id)
            .unwrap();

        // Broadcast game browser update
        self.state
            .broadcast_tx
            .send(meta_games_browser_update(&self.state))
            .unwrap();
    }

    /// Process judging
    async fn handle_judging(&self, request: JudgeDecisionRequest, addr: SocketAddr) {
        // Get pointers
        let player_user_id = self
            .state
            .online_users
            .read()
            .unwrap()
            .get(&addr)
            .unwrap()
            .read()
            .unwrap()
            .uuid
            .to_string();

        let this_game = self
            .state
            .games
            .read()
            .unwrap()
            .get(&request.game_id)
            .unwrap()
            .clone();

        // Send to game
        this_game
            .write()
            .unwrap()
            .judge_round(request.clone(), player_user_id.clone());

        let this_game_id = this_game.read().unwrap().uuid.to_string();
        self.send_game_state_update(this_game_id).await
    }

    /// Process player move request
    async fn handle_player_move(&self, request: PlayerMoveRequest, addr: SocketAddr) {
        // Get pointers
        let player_user_id = self
            .state
            .online_users
            .read()
            .unwrap()
            .get(&addr)
            .unwrap()
            .read()
            .unwrap()
            .uuid
            .to_string();

        let this_game = self
            .state
            .games
            .read()
            .unwrap()
            .get(&request.game_id)
            .unwrap()
            .clone();

        // Do the stuff
        match this_game
            .write()
            .unwrap()
            .player_move(request, player_user_id)
        {
            Err(err) => {
                let message = ChatMessage { text: err };
                let tx = self.state.users_tx.clone();
                tokio::spawn(async move {
                    let _ = tx.send(DmUser(SendChatMessage(message), Addr(addr))).await;
                })
            }
            Ok(None) => tokio::spawn(async move { tracing::debug!("None") }),
            Ok(Some((judge_round, czar_id))) => {
                let tx = self.state.users_tx.clone();

                tokio::spawn(async move {
                    let _ = tx
                        .send(DmUser(SendJudgeRound(judge_round), Id(czar_id)))
                        .await;
                })
            }
        };
    }

    /// Puts a user in a game
    async fn join_game(&self, id: String, addr: SocketAddr) {
        // Get pointers
        let this_game = self.state.games.read().unwrap().get(&id).unwrap().clone();
        let this_user = self
            .state
            .online_users
            .read()
            .unwrap()
            .get(&addr)
            .unwrap()
            .clone();

        // Create player
        this_game.write().unwrap().create_player(this_user);

        // Send updates for all players
        self.send_game_state_update(id).await;

        // Broadcast game browser update
        self.state
            .broadcast_tx
            .send(meta_games_browser_update(&self.state))
            .unwrap();

        // Broadcast server meta update
        self.state
            .broadcast_tx
            .send(meta_server_summary_update(&self.state))
            .unwrap();
    }

    /// Send game state update for all players of a game
    async fn send_game_state_update(&self, game_id: String) {
        let this_game = self
            .state
            .games
            .read()
            .unwrap()
            .get(&game_id)
            .unwrap()
            .clone();

        let players = this_game
            .read()
            .unwrap()
            .players
            .values()
            .map(|player| GamePlayerMeta {
                name: player.user.read().unwrap().name.clone(),
                score: player.black.len(),
            })
            .collect::<Vec<GamePlayerMeta>>();

        for player in this_game.read().unwrap().players.values() {
            // Create update for user's game view
            let meta = GameStateMeta {
                uuid: game_id.clone(),
                name: this_game.read().unwrap().name.clone(),
                host: this_game.read().unwrap().host.read().unwrap().name.clone(),
                players: players.clone(),
                czar: this_game.read().unwrap().czar.read().unwrap().name.clone(),
                black: (
                    this_game.read().unwrap().current_black.text.clone(),
                    this_game.read().unwrap().current_black.pick,
                ),
                white: player
                    .white
                    .iter()
                    .map(|card| WhiteCardMeta {
                        uuid: card.uuid.to_string(),
                        text: card.text.clone(),
                    })
                    .collect(),
                packs: this_game.read().unwrap().packs.clone(),
                white_count: this_game.read().unwrap().white.len(),
                black_count: this_game.read().unwrap().black.len(),
                white_discard_count: this_game.read().unwrap().white_discard.len(),
            };

            // Send user's update
            let msg = serde_json::to_string(&meta).unwrap();
            let user_tx = player.user.read().unwrap().tx.clone();
            tokio::spawn(async move { user_tx.send(msg).await });
        }
    }

    /// Creates a new game
    async fn create_new_game(&self, new_game: NewGameRequest, addr: SocketAddr) {
        if new_game.packs.is_empty() {
            tracing::error!("New game cards are empty!");
            return;
        } else if new_game.name.is_empty() {
            tracing::error!("New game name is empty!");
            return;
        }

        // Get host pointer
        let host = self
            .state
            .online_users
            .read()
            .unwrap()
            .get(&addr)
            .unwrap()
            .clone();

        // Create manifest
        let manifest = NewGameManifest {
            name: new_game.name,
            host: host.clone(),
            packs: new_game.packs,
        };

        // Create game using manifest
        let mut new_game_object = Game::new(self.state.clone(), manifest);

        // Don't forget to create the host player!!!
        new_game_object.create_player(host.clone());

        let game_id = new_game_object.uuid.to_string();

        // Add game to active list
        self.state.games.write().unwrap().insert(
            new_game_object.uuid.to_string(),
            Arc::new(RwLock::new(new_game_object)),
        );

        self.send_game_state_update(game_id).await;

        // Broadcast game browser update
        self.state
            .broadcast_tx
            .send(meta_games_browser_update(&self.state))
            .unwrap();

        // Broadcast server meta update
        self.state
            .broadcast_tx
            .send(meta_server_summary_update(&self.state))
            .unwrap();
    }
}