// storage.js — localStorage helpers

const Storage = (() => {
  const KEYS = {
    PLAYER_NAME:  "gd_playerName",
    LOBBY_NAME:   "gd_lobbyName",
    GAME_STATE:   "gd_gameState",
    LEADERBOARD:  "gd_leaderboard",
  };

  function savePlayerName(name) {
    localStorage.setItem(KEYS.PLAYER_NAME, name.trim());
  }

  function getPlayerName() {
    return localStorage.getItem(KEYS.PLAYER_NAME) || "Anonymous";
  }

  function saveLobbyName(name) {
    localStorage.setItem(KEYS.LOBBY_NAME, name.trim());
  }

  function getLobbyName() {
    return localStorage.getItem(KEYS.LOBBY_NAME) || "My Lobby";
  }

  function saveGameState(state) {
    localStorage.setItem(KEYS.GAME_STATE, JSON.stringify(state));
  }

  function getGameState() {
    try {
      return JSON.parse(localStorage.getItem(KEYS.GAME_STATE)) || null;
    } catch {
      return null;
    }
  }

  function clearGameState() {
    localStorage.removeItem(KEYS.GAME_STATE);
  }

  function saveLeaderboard(entry) {
    const board = getLeaderboard();
    board.push(entry);
    board.sort((a, b) => b.totalScore - a.totalScore);
    const top20 = board.slice(0, 20);
    localStorage.setItem(KEYS.LEADERBOARD, JSON.stringify(top20));
  }

  function getLeaderboard() {
    try {
      return JSON.parse(localStorage.getItem(KEYS.LEADERBOARD)) || [];
    } catch {
      return [];
    }
  }

  function clearLeaderboard() {
    localStorage.removeItem(KEYS.LEADERBOARD);
  }

  return {
    savePlayerName,
    getPlayerName,
    saveLobbyName,
    getLobbyName,
    saveGameState,
    getGameState,
    clearGameState,
    saveLeaderboard,
    getLeaderboard,
    clearLeaderboard,
  };
})();