import { prisma } from "@kokorone/db";

const API_PORT = process.env.PORT_API ?? "3001";
const CHARACTER_ID = "seed-character-genki";
const ORIGINAL_EMOTION = { calm: 70, joy: 20, sad: 0, alert: 0, shy: 0, grumpy: 0 };
const BASELINE = { calm: 100, joy: 0, sad: 0, alert: 0, shy: 0, grumpy: 0 };

async function resetEmotion(overrides = BASELINE) {
  await prisma.emotionState.upsert({
    where: { characterId: CHARACTER_ID },
    update: { ...overrides, updatedAt: new Date() },
    create: { characterId: CHARACTER_ID, ...overrides },
  });
}

async function postInput(body) {
  const res = await fetch(`http://localhost:${API_PORT}/emotion/${CHARACTER_ID}/input`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
  });
  if (!res.ok) {
    throw new Error(`POST /emotion/${CHARACTER_ID}/input 回傳 ${res.status}`);
  }
  return res.json();
}

async function getState(now) {
  const url = `http://localhost:${API_PORT}/emotion/${CHARACTER_ID}${now ? `?now=${encodeURIComponent(now)}` : ""}`;
  const res = await fetch(url);
  if (!res.ok) {
    throw new Error(`GET /emotion/${CHARACTER_ID} 回傳 ${res.status}`);
  }
  return res.json();
}

function dominantOf(state) {
  const candidates = [
    ["JOY", state.joy],
    ["SAD", state.sad],
    ["ALERT", state.alert],
    ["SHY", state.shy],
    ["GRUMPY", state.grumpy],
  ];
  const [tag, value] = candidates.reduce((best, cur) => (cur[1] > best[1] ? cur : best), ["CALM", 5]);
  return value > 5 ? tag : "CALM";
}

function assertDominant(state, expected, label) {
  const actual = dominantOf(state);
  if (actual !== expected) {
    throw new Error(`${label}：預期主導情緒為 ${expected}，實際為 ${actual}（${JSON.stringify(state)}）`);
  }
}

export default async function smokeD() {
  // D-1 情緒標記器：正向／負向／衝突語氣輸入分別得到對應標記
  await resetEmotion();
  const positive = await postInput({ text: "謝謝你，我好開心！" });
  assertDominant(positive.state, "JOY", "正向輸入");

  await resetEmotion();
  const negative = await postInput({ text: "今天過得好難過，很失望" });
  assertDominant(negative.state, "SAD", "負向輸入");

  await resetEmotion();
  const conflict = await postInput({ text: "你這個笨蛋，滾開！" });
  assertDominant(conflict.state, "ALERT", "衝突語氣輸入");
  if (conflict.style.sentenceLength !== "short" || conflict.style.initiative !== "low") {
    throw new Error("D-3 警戒狀態的回應風格參數不符預期");
  }

  // D-4 情緒狀態機：連續負向（衝突持續）輸入 → 警戒繼續惡化為低落
  const stillConflicted = await postInput({ text: "我還是很生氣", conflictContinues: true });
  assertDominant(stillConflicted.state, "SAD", "警戒 --> 低落（衝突持續）");

  // 警戒 --> 平靜（確認無威脅）
  await resetEmotion({ calm: 0, joy: 0, sad: 0, alert: 100, shy: 0, grumpy: 0 });
  const safeAgain = await postInput({ text: "沒事了", threatConfirmedSafe: true });
  assertDominant(safeAgain.state, "CALM", "警戒 --> 平靜（確認無威脅）");

  // 低落 --> 平靜（被安慰）
  await resetEmotion({ calm: 50, joy: 0, sad: 50, alert: 0, shy: 0, grumpy: 0 });
  const comforted = await postInput({ text: "謝謝你安慰我", comforted: true });
  assertDominant(comforted.state, "CALM", "低落 --> 平靜（被安慰）");

  // 平靜 --> 害羞（被稱讚）
  await resetEmotion();
  const praised = await postInput({ text: "你今天好可愛喔" });
  assertDominant(praised.state, "SHY", "平靜 --> 害羞（被稱讚）");

  // 平靜 --> 彆扭（小型負向事件）→ 被哄後快速恢復平靜
  await resetEmotion();
  const grumpy = await postInput({ text: "你都不理我" });
  assertDominant(grumpy.state, "GRUMPY", "平靜 --> 彆扭（小型負向事件）");
  const placated = await postInput({ text: "好啦好啦", placated: true });
  assertDominant(placated.state, "CALM", "彆扭 --> 平靜（被哄）");

  // D-3 情緒→回應風格輸出：愉悅指向多話／高主動，低落指向簡短／低主動
  await resetEmotion();
  const joyful = await postInput({ text: "謝謝你，我好開心！" });
  if (joyful.style.sentenceLength !== "long" || joyful.style.initiative !== "high") {
    throw new Error("D-3 愉悅狀態的回應風格參數不符預期");
  }

  await resetEmotion();
  const sadResult = await postInput({ text: "今天過得好難過，很失望" });
  if (sadResult.style.sentenceLength !== "short" || sadResult.style.initiative !== "low") {
    throw new Error("D-3 低落狀態的回應風格參數不符預期");
  }

  // D-2 時間衰減：模擬經過數小時後情緒值回落；跨 session（重新讀取）仍可讀到殘留
  await resetEmotion({ calm: 0, joy: 100, sad: 0, alert: 0, shy: 0, grumpy: 0 });
  const immediate = await getState();
  if (immediate.joy < 90) {
    throw new Error("尚未經過時間就已衰減，時間衰減函數計算有誤");
  }

  const threeHoursLater = new Date(Date.now() + 3 * 60 * 60 * 1000).toISOString();
  const decayed = await getState(threeHoursLater);
  if (decayed.joy >= immediate.joy) {
    throw new Error("模擬時間推進後情緒值未回落");
  }
  if (decayed.joy <= 0) {
    throw new Error("時間推進後情緒殘留應仍大於 0（尚未完全衰減）");
  }

  // 跨 session：不重啟服務也不清狀態，重新 GET 一次應讀到同一份殘留（持久化於資料庫，而非行程記憶體）
  const reread = await getState(threeHoursLater);
  if (Math.abs(reread.joy - decayed.joy) > 0.01) {
    throw new Error("重新讀取時殘留情緒值不一致，情緒狀態未正確持久化");
  }

  const twentyHoursLater = new Date(Date.now() + 20 * 60 * 60 * 1000).toISOString();
  const fullyDecayed = await getState(twentyHoursLater);
  if (dominantOf(fullyDecayed) !== "CALM") {
    throw new Error("長時間衰減後應回歸平靜");
  }

  // 還原種子角色原始展示用情緒值，避免影響其他群組或人工檢視
  await resetEmotion(ORIGINAL_EMOTION);
}