/* Primal Rampage — profile & persistence v2 (localStorage).
   v2 adds: gems (hard currency), permanent upgrades, bestiary kills,
   daily quests + login streak, achievements, lifetime stats, pet,
   tutorial flag, rewarded-ad daily cap, shake amount + quality setting.
   Server-backed leaderboards/accounts plug in later via US.net. */
(function () {
  'use strict';

  var KEY = 'neonrampage.profile.v1';
  var US = (window.US = window.US || {});

  var DEFAULTS = {
    name: 'Rookie',
    lang: 'en',
    coins: 0,
    bombs: 1,
    weapons: ['pistol'],
    heroes: ['recruit'],
    skins: ['default'],
    weapon: 'pistol',
    hero: 'recruit',
    skin: 'default',
    bestScore: 0,
    bestWave: 0,
    // --- v2 ---
    gems: 0,                       // hard currency "ngọn lửa"
    upgrades: {},                  // id -> level
    bestiary: {},                  // speciesId -> {kills, done}
    quests: { date: '', items: [], lastDay: '', streak: 0 },
    achievements: {},              // id -> true
    stats: { totalKills: 0, totalAmber: 0, runs: 0 },
    pet: null,                     // {name, color} once hatched
    tut: false,
    adDay: { date: '', count: 0 }, // rewarded ads watched today (cap 3)
    settings: {
      sfx: 0.8, music: 0.5, autofire: true, autoAim: false, onehit: false,
      shake: true, shakeAmt: 1, quality: 'high'
    },
    board: [] // [{name,score,wave,ts}]
  };

  function clone(o) { return JSON.parse(JSON.stringify(o)); }

  function isPlain(o) { return o && typeof o === 'object' && !(o instanceof Array); }

  // deep-merge stored data over defaults so new fields appear after updates
  function mergeDefaults(dst, def) {
    Object.keys(def).forEach(function (k) {
      if (!(k in dst)) dst[k] = clone(def[k]);
      else if (isPlain(def[k]) && isPlain(dst[k])) mergeDefaults(dst[k], def[k]);
    });
    return dst;
  }

  var state = null;

  function load() {
    try {
      var raw = localStorage.getItem(KEY);
      state = raw ? mergeDefaults(JSON.parse(raw), DEFAULTS) : clone(DEFAULTS);
      state.settings = Object.assign(clone(DEFAULTS.settings), state.settings || {});
      state.stats = Object.assign(clone(DEFAULTS.stats), state.stats || {});
      state.quests = Object.assign(clone(DEFAULTS.quests), state.quests || {});
      state.adDay = Object.assign(clone(DEFAULTS.adDay), state.adDay || {});
      if (!state.weapons.length) state.weapons = ['pistol'];
      if (!state.heroes.length) state.heroes = ['recruit'];
      if (!state.skins.length) state.skins = ['default'];
    } catch (e) {
      state = clone(DEFAULTS);
    }
    return state;
  }

  US.save = {
    get: function () { return state || load(); },
    save: function () {
      try { localStorage.setItem(KEY, JSON.stringify(state)); } catch (e) { /* private mode */ }
    },
    reset: function () {
      state = clone(DEFAULTS);
      US.save.save();
    },

    addCoins: function (n) {
      state.coins = Math.max(0, (state.coins | 0) + n);
      US.save.save();
    },

    /* ---------- hard currency ---------- */
    addGems: function (n) {
      state.gems = Math.max(0, (state.gems | 0) + n);
      US.save.save();
    },
    spendGems: function (n) {
      if ((state.gems | 0) < n) return false;
      state.gems -= n;
      US.save.save();
      return true;
    },

    ownWeapon: function (id) {
      if (state.weapons.indexOf(id) < 0) { state.weapons.push(id); US.save.save(); }
    },
    ownHero: function (id) {
      if (state.heroes.indexOf(id) < 0) { state.heroes.push(id); US.save.save(); }
    },
    ownSkin: function (id) {
      if (state.skins.indexOf(id) < 0) { state.skins.push(id); US.save.save(); }
    },
    equip: function (slot, id) {
      state[slot] = id;
      US.save.save();
    },

    /* ---------- permanent upgrades ---------- */
    upLevel: function (id) { return state.upgrades[id] | 0; },
    buyUpgrade: function (id, cost) {
      var lv = state.upgrades[id] | 0;
      if ((state.coins | 0) < cost) return false;
      state.coins -= cost;
      state.upgrades[id] = lv + 1;
      US.save.save();
      return true;
    },

    /* ---------- bestiary ---------- */
    bumpBestiary: function (speciesId, n) {
      var e = state.bestiary[speciesId];
      if (!e) e = state.bestiary[speciesId] = { kills: 0, done: false };
      e.kills += (n || 1);
      US.save.save();
      return e;
    },
    bestiaryDone: function (speciesId, rewardFn) {
      var e = state.bestiary[speciesId];
      if (e && !e.done) {
        e.done = true;
        if (rewardFn) rewardFn();
        US.save.save();
        return true; // newly completed
      }
      return false;
    },

    /* ---------- lifetime stats ---------- */
    stat: function (k, n) {
      if (n === undefined) return state.stats[k] | 0;
      state.stats[k] = (state.stats[k] | 0) + n;
      US.save.save();
      return state.stats[k];
    },

    /* ---------- achievements ---------- */
    hasAch: function (id) { return !!state.achievements[id]; },
    unlockAch: function (id) {
      if (state.achievements[id]) return false;
      state.achievements[id] = true;
      US.save.save();
      return true;
    },

    /* ---------- rewarded ads (stub; swap with real SDK later) ---------- */
    ADS_DAILY_CAP: 3,
    canWatchAd: function () {
      var today = US.save.today();
      if (state.adDay.date !== today) { state.adDay = { date: today, count: 0 }; }
      return state.adDay.count < US.save.ADS_DAILY_CAP;
    },
    consumeAd: function () {
      var today = US.save.today();
      if (state.adDay.date !== today) state.adDay = { date: today, count: 0 };
      state.adDay.count++;
      US.save.save();
    },

    /* ---------- live-ops ---------- */
    isWeekend: function () {
      var d = new Date().getDay();
      return d === 0 || d === 6;
    },

    /* ---------- misc ---------- */
    today: function () {
      var d = new Date();
      return d.getFullYear() + '-' +
        ('0' + (d.getMonth() + 1)).slice(-2) + '-' +
        ('0' + d.getDate()).slice(-2);
    },

    submitRun: function (score, wave) {
      var isRecord = score > state.bestScore;
      if (isRecord) state.bestScore = Math.floor(score);
      if (wave > state.bestWave) state.bestWave = wave;
      state.board.push({ name: state.name || 'Rookie', score: Math.floor(score), wave: wave, ts: Date.now() });
      state.board.sort(function (a, b) { return b.score - a.score; });
      state.board = state.board.slice(0, 10);
      US.save.save();
      // Plug-in point for a real server leaderboard:
      // if (US.net && US.net.submitRun) US.net.submitRun(state.board[0]);
      return isRecord;
    }
  };

  load();
})();