package games

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

type listChan chan []*Game

func New() Games {

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

	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
		}
	}
}

func (games Games) AddGame(game *Game) {
	games.addChan <- game
}

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