package games

import (
	"encoding/json"

	extStomp "github.com/go-stomp/stomp"
)

type Games struct {
	addChan  chan *Game
	listChan chan listChan
	getChan  chan getGame
}

type listChan chan []*Game

type getGame struct {
	id         int64
	returnChan chan *Game
}

func New() Games {

	games := Games{
		addChan:  make(chan *Game),
		listChan: make(chan listChan),
		getChan:  make(chan getGame),
	}

	go serveGames(games)
	return games
}

func serveGames(games Games) {
	gamesMap := make(map[int64]*Game)

	for {
		select {
		case game := <-games.addChan:
			gamesMap[game.Id] = game
		case r := <-games.listChan:
			v := make([]*Game, 0, len(gamesMap))
			for _, value := range gamesMap {
				v = append(v, value)
			}
			r <- v
		case r := <-games.getChan:
			r.returnChan <- gamesMap[r.id]
		}
	}
}

type stompGameStart struct {
	Type   string `json:"type"`
	GameId int64  `json:"gameid"`
}

func (games Games) AddGame(game *Game, stompConnection *extStomp.Conn) {
	games.addChan <- game
	stompGameStart := stompGameStart{
		Type:   "GAME_START",
		GameId: game.Id,
	}
	b, _ := json.Marshal(stompGameStart)
	stompConnection.Send("gopinguin.game", "", b)
}

func (games Games) ListGames() []*Game {
	r := make(chan []*Game)
	games.listChan <- r
	return <-r
}

func (games Games) GetGame(id int64) *Game {
	getGame := getGame{
		id:         id,
		returnChan: make(chan *Game),
	}
	games.getChan <- getGame
	return <-getGame.returnChan
}