import cloud from '@lafjs/cloud'
const db = cloud.database();
import Utils from "@/Utils";
export default async function (ctx: FunctionContext) {
  const action = ctx.body.action;
  const uid = ctx.body.uid;
  const event = ctx.body.event;
  let dbname = "users";
  // const gameName = ctx.body.gameName;
  // if (gameName == "iaa") {
  //   dbname = "usersAd";
  // }
  if (!action) {
    return { code: 0, data: null, msg: "未获取到action" };
  }
  if (!uid) {
    return { code: 0, data: null, msg: "未获取到uid" };
  }
  let res = await db.collection(dbname).where({ _id: uid }).getOne();
  if (!res.data) return { code: 0, data: null, msg: "未获取到玩家数据" };
  const token1 = ctx.body.token;
  if (res.data && res.data.token) {
    let istoken = Utils.checkToken(token1, res.data.token);
    if (!istoken) {
      return { code: 0, data: null, msg: "token校验失败" };
    }
  }
  if (event === "starter_pack" && ["save", "read", "reactivate", "shown"].includes(action)) {
    if (action === "shown") {
      // Only an actually displayed, current offer can advance this timestamp.
      const now = Date.now();
      if (Number(res.data.starter_packState) !== 1 && Number(res.data.starter_pack) > now
        && Number(ctx.body.expiry) === Number(res.data.starter_pack)) {
        await db.collection(dbname).where({
          _id: uid, starter_pack: res.data.starter_pack,
          starter_packState: res.data.starter_packState ?? null,
          starterPackLastShownAt: res.data.starterPackLastShownAt ?? null,
        }).update({ starterPackLastShownAt: Math.max(now, Number(res.data.starterPackLastShownAt) || 0) });
      }
      res = await db.collection(dbname).where({ _id: uid }).getOne();
    }
    const originalExpiry = Number(res.data.starter_pack) || 0;
    const now = Date.now();
    const options = action === "reactivate" ? ctx.body : null;
    const user = await refreshStarterPack(res.data, action === "save", dbname, options);
    return {
      code: 1, data: {
        starter_pack: Number(user.starter_pack) || 0,
        starter_packState: Number(user.starter_packState) || 0,
        starterPackVersion: Number(user.starterPackVersion) || 1,
        starterPackRound: starterPackRound(user),
        serverTime: Date.now(),
        starterPackLastShownAt: Number(user.starterPackLastShownAt) || 0,
        reactivated: action === "reactivate" && originalExpiry > 0
          && originalExpiry <= now && Number(user.starter_pack) > now,
      }, msg: "成功"
    };
  }
  return { code: 400, data: null, msg: "无效的活动请求" };
}

const DAY = 24 * 60 * 60 * 1000;
// starterPackVersion on the user is only a deadline-migration marker:
// 1 = legacy 24h, 2 = already using 48h. Orders do not use this field.

// Upgrade only an unpurchased, still-live legacy offer, once. Its old deadline
// was trigger + 24h, so extending by 24h preserves the original trigger time.
export function starterPackPatch(user: any, now: number, trigger = false, options: any = null) {
  const expiry = Number(user.starter_pack) || 0;
  if (Number(user.starter_packState) === 1) return null;
  if (expiry === 0) {
    if (!trigger || Number(user.levelAmount) < 15 || !Number.isFinite(Number(user.levelAmount))) return null;
    return { starter_pack: now + 2 * DAY, starter_packState: 0, starterPackVersion: 2, starterPackRound: 1 };
  }
  if (expiry > now && (Number(user.starterPackVersion) || 1) < 2) {
    return { starter_pack: expiry + DAY, starterPackVersion: 2, starterPackRound: starterPackRound(user) };
  }
  if (expiry > 0 && expiry <= now && options
    && Number.isFinite(Number(user.levelAmount)) && Number(user.levelAmount) >= 15) {
    // Legacy records have no exact exposure time. Their expiry is a conservative
    // fallback. A locally remembered exposure can only postpone reactivation.
    const lastShown = Math.max(Number(user.starterPackLastShownAt) || expiry,
      Math.min(now, Math.max(0, Number(options.lastShownAt) || 0)));
    if (now - lastShown <= 2 * DAY) return null;
    const eligible = options.reason === "shop" || options.reason === "level_purchase"
      || (options.reason === "low_coin" && user.coinAmount != null
        && Number.isFinite(Number(user.coinAmount)) && Number(user.coinAmount) < 500)
      || (options.reason === "four_failures" && Number(options.level) === Number(user.levelAmount)
        && Number.isInteger(options.failureCount) && options.failureCount >= 4);
    if (eligible) return { starter_pack: now + 2 * DAY, starterPackVersion: 2, starterPackRound: starterPackRound(user) + 1 };
  }
  return null;
}

export async function refreshStarterPack(user: any, trigger = false, collection = 'users', options: any = null) {
  const db = cloud.database();
  for (let attempt = 0; attempt < 3; attempt++) {
    const patch = starterPackPatch(user, Date.now(), trigger, options);
    if (!patch) return user;
    // Compare the stored values so concurrent reads cannot extend twice, and a
    // payment callback cannot have its purchased flag overwritten by activation.
    await db.collection(collection).where({
      _id: user._id,
      starter_pack: user.starter_pack ?? null,
      starter_packState: user.starter_packState ?? null,
      starterPackVersion: user.starterPackVersion ?? null,
      starterPackRound: user.starterPackRound ?? null,
      starterPackLastShownAt: user.starterPackLastShownAt ?? null,
      ...(options?.reason === "low_coin" ? { coinAmount: user.coinAmount ?? null } : {}),
    }).update(patch);
    const fresh = await db.collection(collection).where({ _id: user._id }).getOne();
    if (!fresh.data) throw new Error('未获取到玩家数据');
    user = fresh.data;
  }
  return user;
}

// One round per activated offer, independent of daily popup impressions.
export function starterPackRound(user: any): number {
  const round = Number(user?.starterPackRound);
  return Number.isSafeInteger(round) && round > 0 ? round : Number(user?.starter_pack) > 0 ? 1 : 0;
}

export function starterPackOrderSnapshot(user: any, itemid: string) {
  if (itemid !== 'starter_pack') return {};
  return {
    starterPackBuyRound: Math.max(1, starterPackRound(user)),
    starterPackExpiresAt: Math.max(0, Number(user?.starter_pack) || 0),
  };
}

// Called only after server-side payment confirmation, never from client reward claims.
// Keep a persisted snapshot so retries and later offer rounds cannot change the event.
export async function reportRookieGift(order: any, user: any, paidAt: number) {
  if (order?.itemid !== 'starter_pack' || !order.outTradeNo || user?.openid !== order.openid) return;
  try {
    const db = cloud.database();
    if (!order.rookieGiftPaidAt) {
      const now = Date.now();
      const validPaidAt = Number.isFinite(paidAt) && paidAt > 0 && paidAt <= now
        && (!Number(order.time) || paidAt >= Number(order.time));
      const paymentTime = validPaidAt ? paidAt : now;
      // Pre-deployment pending orders have no cycle snapshot. Only use the user's
      // current deadline if creation belongs to that cycle; otherwise report 0s.
      const currentExpiry = Number(user.starter_pack) || 0;
      const sameCycle = Number(order.time) >= currentExpiry - 2 * DAY && Number(order.time) <= currentExpiry;
      const expiry = Number(order.starterPackExpiresAt ?? (sameCycle ? currentExpiry : 0)) || 0;
      const round = Number(order.starterPackBuyRound ?? (sameCycle ? starterPackRound(user) : 1));
      await db.collection('order').where({ outTradeNo: order.outTradeNo, rookieGiftPaidAt: null }).update({
        rookieGiftPaidAt: paymentTime,
        rookieGiftBuyRound: Number.isSafeInteger(round) && round > 0 ? round : 1,
        rookieGiftTimeLeft: Math.max(0, Math.floor((expiry - paymentTime) / 1000)),
      });
    }
    const fresh = await db.collection('order').where({ outTradeNo: order.outTradeNo }).getOne();
    const saved = fresh.data;
    if (!saved?.rookieGiftPaidAt) throw new Error('rookie_gift snapshot not persisted');
    const ThinkingData = require('thinkingdata-node');
    // e5e0为正式服
    const appId = user.isDebug === 'true' ? '95993f9ab6f1402a87abe5147827e5e0' : '40e3d5c5f2af49a4a074205564ce5dbb';
    const sdk = ThinkingData.initWithBatchMode(appId, 'https://data.nika4fun.com/sync_data', { dryRun: false, deviceId: '123456789' });
    try {
      // ThinkingData deduplicates this event by order ID, including concurrent
      // callbacks and retries after uncertain network delivery.
      sdk.trackFirst({
        accountId: order.openid,
        ...(user.distinctId ? { distinctId: user.distinctId } : {}),
        event: 'rookie_gift',
        firstCheckId: order.outTradeNo,
        time: new Date(saved.rookieGiftPaidAt + 8 * 3600000),
        properties: { order_id: order.outTradeNo, buy_round: saved.rookieGiftBuyRound, time_left: saved.rookieGiftTimeLeft },
        callback(error: any) { if (error) console.error('rookie_gift 上报失败', order.outTradeNo, error); },
      });
    } finally {
      sdk.close();
    }
  } catch (error) {
    // Analytics failure must not block payment acknowledgement or client delivery.
    console.error('rookie_gift 上报失败', order.outTradeNo, error);
  }
}