package lobby_registry

import (
	"mchess_server/utils"

	"github.com/google/uuid"
)

type LobbyRegistry struct {
	lobbies map[uuid.UUID]*Lobby
}

var instance *LobbyRegistry

func GetLobbyRegistry() *LobbyRegistry {
	if instance == nil {
		instance = newLobbyRegistry()
	}

	return instance
}

func newLobbyRegistry() *LobbyRegistry {
	return &LobbyRegistry{lobbies: make(map[uuid.UUID]*Lobby)}
}

func (r *LobbyRegistry) CreateNewPrivateLobby() *Lobby {
	lobby := newEmptyLobbyWithPassphrase()
	r.addNewLobby(lobby)
	return lobby
}

func (r *LobbyRegistry) GetLobbyForPlayer() *Lobby {
	for _, lobby := range r.lobbies {
		if !lobby.IsFull() {
			return lobby
		}
	}

	newLobby := NewEmptyLobbyWithUUID(uuid.New())
	r.addNewLobby(newLobby)
	return newLobby
}

func (r *LobbyRegistry) GetLobbyByUUID(uuid uuid.UUID) *Lobby {
	return r.lobbies[uuid]
}

func (r *LobbyRegistry) GetLobbyByPassphrase(p utils.Passphrase) *Lobby {
	for _, lobby := range r.lobbies {
		if lobby.Passphrase == p {
			return lobby
		}
	}
	return nil
}

func (r *LobbyRegistry) addNewLobby(lobby *Lobby) uuid.UUID {
	r.lobbies[lobby.Uuid] = lobby
	return lobby.Uuid
}