// === スコア基本値 & レア度倍率 ===
const BASE_BIG = 1000;
const BASE_REG = 300;

const rarityMultiplier = {
  common: 1.2,
  uncommon: 1.4,
  rare: 1.6,
  ultra: 1.8,
  final: 2.0
};

function rarityLabel(r) {
  switch (r) {
    case "common": return "コモン";
    case "uncommon": return "アンコモン";
    case "rare": return "レア";
    case "ultra": return "ウルトラレア";
    case "final": return "ファイナルレア";
    default: return r;
  }
}

// === 設定ごとの確率（アイム準拠の簡易モデル） ===
const settingTable = {
  1: { grape: 1/6.49, cherry: 1/35, big: 1/287, reg: 1/455 },
  2: { grape: 1/6.44, cherry: 1/35, big: 1/282, reg: 1/431 },
  3: { grape: 1/6.40, cherry: 1/35, big: 1/273, reg: 1/372 },
  4: { grape: 1/6.37, cherry: 1/35, big: 1/264, reg: 1/336 },
  5: { grape: 1/6.33, cherry: 1/35, big: 1/252, reg: 1/302 },
  6: { grape: 1/6.00, cherry: 1/35, big: 1/240, reg: 1/287 }
};

// 設定の重み（設定1が多い）
const settingWeights = [
  { setting: 1, w: 60 },
  { setting: 2, w: 16 },
  { setting: 3, w: 10 },
  { setting: 4, w: 7 },
  { setting: 5, w: 5 },
  { setting: 6, w: 2 }
];

function chooseRandomSetting() {
  const total = settingWeights.reduce((s, x) => s + x.w, 0);
  let r = Math.random() * total;
  for (const item of settingWeights) {
    if (r < item.w) return item.setting;
    r -= item.w;
  }
  return 1;
}

// === コレクション取得 ===
function getCollectedCharacters() {
  const collectedIds = JSON.parse(localStorage.getItem("collection") || "[]");
  if (collectedIds.length === 0) return characters.slice();
  return characters.filter(c => collectedIds.includes(c.id));
}

const allCollected = getCollectedCharacters();
function pickRandom(arr) {
  return arr[Math.floor(Math.random() * arr.length)];
}

// === BIG/REG キャラ & 小役キャラ ===
let bigChar = null;
let regChar = null;
let grapeChar = null;
let cherryChar = null;

function chooseBonusCharacters() {
  bigChar = pickRandom(allCollected);

  do {
    regChar = pickRandom(allCollected);
  } while (regChar.id === bigChar.id);

  // 小役キャラも選ぶ
  do {
    grapeChar = pickRandom(allCollected);
  } while (grapeChar.id === bigChar.id || grapeChar.id === regChar.id);

  do {
    cherryChar = pickRandom(allCollected);
  } while (cherryChar.id === bigChar.id || cherryChar.id === regChar.id || cherryChar.id === grapeChar.id);

  document.getElementById("bigInfo").textContent =
    `BIG図柄：${bigChar.name}（${rarityLabel(bigChar.rarity)}）`;
  document.getElementById("regInfo").textContent =
    `REG図柄：${regChar.name}（${rarityLabel(regChar.rarity)}）`;
}

// === リール・状態 ===
const reelImgs = [
  document.getElementById("reel0"),
  document.getElementById("reel1"),
  document.getElementById("reel2")
];

const cardBack = "assets/card_back.png";
let spinning = false;
let stopped = [false, false, false];

let currentSetting = null;
let currentResult = "NONE";        // "BIG" "REG" "GRAPE" "CHERRY" "NONE"
let decidedSymbols = [null, null, null];

// スコア
let totalScore = parseInt(localStorage.getItem("slotTotalScore") || "0");
let bestScore  = parseInt(localStorage.getItem("slotBestScore") || "0");
function updateScoreBoard() {
  document.getElementById("totalScore").textContent = totalScore;
  document.getElementById("bestScore").textContent = bestScore;
}

updateScoreBoard();
chooseBonusCharacters();

const lamp = document.getElementById("gogoLamp");
const gakoSound = document.getElementById("gakoSound");
const leverBtn  = document.getElementById("leverBtn");
const stopBtns  = [
  document.getElementById("stop0"),
  document.getElementById("stop1"),
  document.getElementById("stop2")
];
const lastResultEl = document.getElementById("lastResult");

function resetReels() {
  for (let i = 0; i < 3; i++) {
    reelImgs[i].src = cardBack;
    stopped[i] = false;
  }
}

function enableStops(enable) {
  stopBtns.forEach(btn => btn.disabled = !enable);
}

// === 小役抽選 → ボーナス抽選 → ハズレ ===
function lottery() {
  const st = currentSetting;
  const tbl = settingTable[st];

  // ① ブドウ
  if (Math.random() < tbl.grape) return "GRAPE";

  // ② チェリー
  if (Math.random() < tbl.cherry) return "CHERRY";

  // ③ ボーナス
  if (Math.random() < tbl.big) return "BIG";
  if (Math.random() < tbl.reg) return "REG";

  // ④ ハズレ
  return "NONE";
}

// === レバーON ===
leverBtn.addEventListener("click", () => {
  if (spinning) return;

  if (!currentSetting) currentSetting = chooseRandomSetting();

  spinning = true;
  lamp.classList.remove("on");
  resetReels();
  enableStops(true);
  lastResultEl.textContent = "";

  currentResult = lottery();

  // 小役・ボーナス決定に応じて停止図柄を決める
  decidedSymbols = [null, null, null];

  if (currentResult === "BIG") {
    decidedSymbols = [bigChar, bigChar, bigChar];
  }
  else if (currentResult === "REG") {
    decidedSymbols = [regChar, regChar, regChar];
  }
  else if (currentResult === "GRAPE") {
    decidedSymbols = [grapeChar, grapeChar, grapeChar];
  }
  else if (currentResult === "CHERRY") {
    decidedSymbols = [
      cherryChar,
      pickRandom(allCollected),
      pickRandom(allCollected)
    ];
  }
  else {
    for (let i = 0; i < 3; i++) {
      decidedSymbols[i] = pickRandom(allCollected);
    }
  }

  // ボーナスの場合はペカ＆ガコッ
  if (currentResult === "BIG" || currentResult === "REG") {
    const delay = 200 + Math.random() * 800;
    setTimeout(() => {
      lamp.classList.add("on");
      try { gakoSound.currentTime = 0; gakoSound.play(); } catch(e){}
    }, delay);
  }
});

// === ストップ処理 ===
stopBtns.forEach((btn, i) => {
  btn.addEventListener("click", () => {
    if (!spinning || stopped[i]) return;

    stopped[i] = true;
    reelImgs[i].src = decidedSymbols[i].image;

    if (stopped.every(v => v)) {
      spinning = false;
      enableStops(false);
      evaluate();
    }
  });
});

// === 判定 ===
function evaluate() {
  if (currentResult === "BIG" || currentResult === "REG") {
    const char = (currentResult === "BIG") ? bigChar : regChar;
    const base = (currentResult === "BIG") ? BASE_BIG : BASE_REG;
    const mul  = rarityMultiplier[char.rarity];
    const add  = Math.round(base * mul);

    totalScore += add;
    if (totalScore > bestScore) bestScore = totalScore;

    localStorage.setItem("slotTotalScore", totalScore);
    localStorage.setItem("slotBestScore", bestScore);

    updateScoreBoard();

    lastResultEl.textContent = `${currentResult} 当選！ +${add}点`;
  }
  else if (currentResult === "GRAPE") {
    totalScore += 3;
    lastResultEl.textContent = `ブドウ +3点`;
  }
  else if (currentResult === "CHERRY") {
    totalScore += 10;
    lastResultEl.textContent = `チェリー +10点`;
  }
  else {
    lastResultEl.textContent = "ハズレ…";
  }

  localStorage.setItem("slotTotalScore", totalScore);

  // たまに設定変更
  if (Math.random() < 0.05) {
    currentSetting = null;
  }
}