/**
 * 视频号：作品维度「作品列表 + 按天聚合数据」→ 导入 work_day_statistics
 *
 * 流程：
 * 1. 获取 works 表中 platform=weixin_video 的作品（platform_video_id 存的是 exportId）
 * 2. 调用 post_list 接口获取作品列表，通过 exportId 匹配得到 objectId
 * 3. 对每个作品调用 feed_aggreagate_data_by_tab_type，取「全部」tab 的按天数据
 * 4. 将 browse→播放、like→点赞、comment→评论 写入 work_day_statistics（follow=关注、fav/forward 暂不入库）
 */

import crypto from 'crypto';
import { AppDataSource, PlatformAccount, Work } from '../models/index.js';
import { logger } from '../utils/logger.js';
import { WorkDayStatisticsService } from './WorkDayStatisticsService.js';
import { CookieManager } from '../automation/cookie.js';

const POST_LIST_BASE =
  'https://channels.weixin.qq.com/micro/statistic/cgi-bin/mmfinderassistant-bin/statistic/post_list';
const FEED_AGGREGATE_BASE =
  'https://channels.weixin.qq.com/micro/statistic/cgi-bin/mmfinderassistant-bin/statistic/feed_aggreagate_data_by_tab_type';

/** 列表页 _pageUrl（与浏览器「数据统计-作品」列表一致） */
const POST_LIST_PAGE_URL = 'https://channels.weixin.qq.com/micro/statistic/post';
/** 详情页 _pageUrl（与浏览器 postDetail 一致，feed_aggreagate 用） */
const POST_DETAIL_PAGE_URL = 'https://channels.weixin.qq.com/micro/statistic/postDetail';

/** 生成随机 _rid（格式如 6982df69-ff6e46a5，8hex-8hex） */
function generateRandomRid(): string {
  const a = crypto.randomBytes(4).toString('hex');
  const b = crypto.randomBytes(4).toString('hex');
  return `${a}-${b}`;
}

/**
 * 构建带 _aid、_rid、_pageUrl 的 URL。
 * 若传入 sessionAid/sessionRid 则优先使用（本账号 post_list 生成的，复用于 feed_aggreagate）；
 * 否则读环境变量 WX_VIDEO_AID、WX_VIDEO_RID。
 */
function buildUrlWithAidRid(
  base: string,
  pageUrl: string,
  sessionAid?: string,
  sessionRid?: string
): string {
  const aid = sessionAid ?? process.env.WX_VIDEO_AID?.trim() ?? '';
  const rid = sessionRid ?? process.env.WX_VIDEO_RID?.trim() ?? '';
  const params = new URLSearchParams();
  if (aid) params.set('_aid', aid);
  if (rid) params.set('_rid', rid);
  params.set('_pageUrl', pageUrl);
  const qs = params.toString();
  return qs ? `${base}?${qs}` : base;
}

function tryDecryptCookieData(cookieData: string | null): string | null {
  if (!cookieData) return null;
  const raw = cookieData.trim();
  if (!raw) return null;
  try {
    return CookieManager.decrypt(raw);
  } catch {
    return raw;
  }
}

/** 将账号 cookie_data 转为 HTTP Cookie 头字符串 */
function getCookieHeaderString(cookieData: string | null): string {
  const raw = tryDecryptCookieData(cookieData);
  if (!raw) return '';
  const s = raw.trim();
  if (!s) return '';
  if (s.startsWith('[') || s.startsWith('{')) {
    try {
      const parsed = JSON.parse(s);
      const arr = Array.isArray(parsed) ? parsed : parsed?.cookies ?? [];
      if (!Array.isArray(arr)) return '';
      return arr
        .map((c: { name?: string; value?: string }) => {
          const name = String(c?.name ?? '').trim();
          const value = String(c?.value ?? '').trim();
          return name ? `${name}=${value}` : '';
        })
        .filter(Boolean)
        .join('; ');
    } catch {
      return s;
    }
  }
  return s;
}

/** 从 Cookie 字符串中解析 x-wechat-uin（可选） */
function getXWechatUinFromCookie(cookieHeader: string): string | undefined {
  const match = cookieHeader.match(/\bwxuin=(\d+)/i);
  return match ? match[1] : undefined;
}

/** 从账号 account_id 得到 _log_finder_id（去掉 weixin_video_ 前缀，保证以 @finder 结尾） */
function getLogFinderId(accountId: string | null): string {
  if (!accountId) return '';
  const s = String(accountId).trim();
  const prefix = 'weixin_video_';
  const id = s.startsWith(prefix) ? s.slice(prefix.length) : s;
  if (!id) return '';
  return id.endsWith('@finder') ? id : `${id}@finder`;
}

function buildPostListUrl(sessionAid?: string, sessionRid?: string): string {
  return buildUrlWithAidRid(POST_LIST_BASE, POST_LIST_PAGE_URL, sessionAid, sessionRid);
}

function buildFeedAggregateUrl(sessionAid?: string, sessionRid?: string): string {
  return buildUrlWithAidRid(FEED_AGGREGATE_BASE, POST_DETAIL_PAGE_URL, sessionAid, sessionRid);
}

/** 近30天到昨天：返回 [startTime, endTime] Unix 秒（中国时间 00:00:00 起算） */
function getLast30DaysRange(): { startTime: number; endTime: number; startDate: Date; endDate: Date } {
  const now = new Date();
  const yesterday = new Date(now.getFullYear(), now.getMonth(), now.getDate() - 1);
  const startDate = new Date(yesterday.getFullYear(), yesterday.getMonth(), yesterday.getDate() - 30);
  startDate.setHours(0, 0, 0, 0);
  yesterday.setHours(23, 59, 59, 999);
  const startTime = Math.floor(startDate.getTime() / 1000);
  const endTime = Math.floor(yesterday.getTime() / 1000);
  const endDateNorm = new Date(yesterday.getFullYear(), yesterday.getMonth(), yesterday.getDate());
  endDateNorm.setHours(0, 0, 0, 0);
  return { startTime, endTime, startDate, endDate: endDateNorm };
}

function toInt(val: unknown, defaultVal = 0): number {
  if (typeof val === 'number') return Number.isFinite(val) ? Math.round(val) : defaultVal;
  if (typeof val === 'string') {
    const n = parseInt(val, 10);
    return Number.isFinite(n) ? n : defaultVal;
  }
  return defaultVal;
}

interface PostListItem {
  objectId?: string;
  exportId?: string;
}

interface FeedAggregateDataByTabType {
  tabType?: number;
  tabTypeName?: string;
  data?: {
    browse?: string[];
    like?: string[];
    comment?: string[];
    forward?: string[];
    fav?: string[];
    follow?: string[];
  };
}

export class WeixinVideoWorkStatisticsImportService {
  private accountRepository = AppDataSource.getRepository(PlatformAccount);
  private workRepository = AppDataSource.getRepository(Work);
  private workDayStatisticsService = new WorkDayStatisticsService();

  static async runDailyImport(): Promise<void> {
    const svc = new WeixinVideoWorkStatisticsImportService();
    await svc.runDailyImportForAllWeixinVideoAccounts();
  }

  async runDailyImportForAllWeixinVideoAccounts(): Promise<void> {
    const accounts = await this.accountRepository.find({
      where: { platform: 'weixin_video' as any },
    });
    logger.info(`[WX WorkStats] Start import for ${accounts.length} weixin_video accounts`);
    for (const account of accounts) {
      try {
        await this.importAccountWorksStatistics(account);
      } catch (e) {
        logger.error(
          `[WX WorkStats] Account failed. accountId=${account.id} name=${account.accountName || ''}`,
          e
        );
      }
    }
    logger.info('[WX WorkStats] All accounts done');
  }

  private async importAccountWorksStatistics(account: PlatformAccount): Promise<void> {
    const cookieHeader = getCookieHeaderString(account.cookieData);
    if (!cookieHeader) {
      logger.warn(`[WX WorkStats] accountId=${account.id} cookieData 为空或无法解析，跳过`);
      return;
    }

    const works = await this.workRepository.find({
      where: { accountId: account.id, platform: 'weixin_video' as any },
    });
    if (!works.length) {
      logger.info(`[WX WorkStats] accountId=${account.id} 没有作品，跳过`);
      return;
    }

    const { startTime, endTime, startDate, endDate } = getLast30DaysRange();
    const logFinderId = getLogFinderId(account.accountId);
    const xWechatUin = getXWechatUinFromCookie(cookieHeader);

    // _aid：post_list 时生成一次，本批次请求数据接口（feed_aggreagate）时复用；_rid 每次请求随机
    const sessionAid =
      process.env.WX_VIDEO_AID?.trim() || crypto.randomUUID();
    logger.info(`[WX WorkStats] accountId=${account.id} post_list 生成 aid=${sessionAid}，数据接口复用此 aid，rid 每次随机`);

    const headers: Record<string, string> = {
      accept: '*/*',
      'accept-language': 'zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6',
      'content-type': 'application/json',
      cookie: cookieHeader,
      origin: 'https://channels.weixin.qq.com',
      referer: 'https://channels.weixin.qq.com/micro/statistic/post',
      'user-agent':
        'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 Edg/144.0.0.0',
    };
    if (xWechatUin) headers['x-wechat-uin'] = xWechatUin;

    const postListBody = {
      pageSize: 100,
      currentPage: 1,
      sort: 0,
      order: 0,
      startTime,
      endTime,
      timestamp: String(Date.now()),
      _log_finder_uin: '',
      _log_finder_id: logFinderId,
      rawKeyBuff: null,
      pluginSessionId: null,
      scene: 7,
      reqScene: 7,
    };

    const postListUrl = buildPostListUrl(sessionAid, generateRandomRid());
    let res: Response;
    try {
      res = await fetch(postListUrl, {
        method: 'POST',
        headers,
        body: JSON.stringify(postListBody),
        signal: AbortSignal.timeout(30_000),
      });
    } catch (e) {
      logger.error(`[WX WorkStats] post_list request failed. accountId=${account.id}`, e);
      throw e;
    }

    if (!res.ok) {
      logger.warn(`[WX WorkStats] post_list HTTP ${res.status}. accountId=${account.id}`);
      return;
    }

    const postListJson = (await res.json().catch(() => null)) as {
      errCode?: number;
      errMsg?: string;
      data?: { list?: PostListItem[]; totalCount?: number };
    } | null;

    if (!postListJson || postListJson.errCode !== 0) {
      logger.warn(
        `[WX WorkStats] post_list errCode=${postListJson?.errCode} errMsg=${postListJson?.errMsg}. accountId=${account.id}`
      );
      return;
    }

    const list = postListJson.data?.list ?? [];
    const totalCount = postListJson.data?.totalCount ?? list.length;
    const exportIdToObjectId = new Map<string, string>();
    for (const item of list) {
      const exportId = item.exportId ?? '';
      const objectId = item.objectId ?? '';
      if (exportId && objectId) exportIdToObjectId.set(exportId, objectId);
    }

    // 日志：对比 API 与 DB 的 exportId
    logger.info(
      `[WX WorkStats] accountId=${account.id} post_list 返回 totalCount=${totalCount} list.length=${list.length}`
    );
    const apiExportIds: string[] = [];
    for (let i = 0; i < list.length; i++) {
      const item = list[i];
      const eid = (item.exportId ?? '').trim();
      const oid = (item.objectId ?? '').trim();
      apiExportIds.push(eid);
      logger.info(`[WX WorkStats] post_list[${i}] exportId=${eid} objectId=${oid}`);
    }
    for (const work of works) {
      const dbExportId = (work.platformVideoId ?? '').trim();
      if (!dbExportId) continue;
      const matched = exportIdToObjectId.has(dbExportId);
      logger.info(
        `[WX WorkStats] DB workId=${work.id} platform_video_id(exportId)=${dbExportId} 匹配post_list=${matched}`
      );
      if (!matched && apiExportIds.length > 0) {
        const sameLength = apiExportIds.filter((e) => e.length === dbExportId.length).length;
        const containsDb = apiExportIds.some((e) => e === dbExportId || e.includes(dbExportId) || dbExportId.includes(e));
        logger.info(
          `[WX WorkStats] 对比: DB长度=${dbExportId.length} API条数=${apiExportIds.length} 同长API条数=${sameLength} 是否包含关系=${containsDb}`
        );
      }
    }

    let totalInserted = 0;
    let totalUpdated = 0;

    const feedHeaders: Record<string, string> = {
      ...headers,
      referer: 'https://channels.weixin.qq.com/micro/statistic/postDetail?isImageMode=0',
      'finger-print-device-id':
        process.env.WX_VIDEO_FINGERPRINT_DEVICE_ID?.trim() ||
        '4605bc28ad3962eb9ee791897b199217',
    };

    for (const work of works) {
      const exportId = (work.platformVideoId ?? '').trim();
      if (!exportId) continue;

      const objectId = exportIdToObjectId.get(exportId);
      if (!objectId) {
        logger.debug(`[WX WorkStats] workId=${work.id} exportId=${exportId} 未在 post_list 中匹配到 objectId，跳过`);
        continue;
      }

      const feedBody = {
        startTs: String(startTime),
        endTs: String(endTime),
        interval: 3,
        feedId: objectId,
        timestamp: String(Date.now()),
        _log_finder_uin: '',
        _log_finder_id: logFinderId,
        rawKeyBuff: null,
        pluginSessionId: null,
        scene: 7,
        reqScene: 7,
      };

      const feedUrl = buildFeedAggregateUrl(sessionAid, generateRandomRid());
      let feedRes: Response;
      try {
        feedRes = await fetch(feedUrl, {
          method: 'POST',
          headers: feedHeaders,
          body: JSON.stringify(feedBody),
          signal: AbortSignal.timeout(30_000),
        });
      } catch (e) {
        logger.error(`[WX WorkStats] feed_aggreagate request failed. workId=${work.id} feedId=${objectId}`, e);
        continue;
      }

      if (!feedRes.ok) {
        logger.warn(`[WX WorkStats] feed_aggreagate HTTP ${feedRes.status}. workId=${work.id}`);
        continue;
      }

      const feedJson = (await feedRes.json().catch(() => null)) as {
        errCode?: number;
        data?: {
          dataByFanstype?: { dataByTabtype?: FeedAggregateDataByTabType[] }[];
          feedData?: { dataByTabtype?: FeedAggregateDataByTabType[] }[];
        };
      } | null;

      const isTestWork = work.id === 866 || work.id === 867 || work.id === 902 || work.id === 903;
      if (isTestWork) {
        logger.info(`[WX WorkStats] feed_aggreagate 原始响应 workId=${work.id} errCode=${feedJson?.errCode} errMsg=${(feedJson as any)?.errMsg} 完整body=${JSON.stringify(feedJson ?? null)}`);
      }

      if (!feedJson || feedJson.errCode !== 0) {
        if (isTestWork) {
          logger.warn(`[WX WorkStats] workId=${work.id} feed_aggreagate 非成功 errCode=${feedJson?.errCode} 跳过`);
        }
        continue;
      }

      const dataByFanstype = feedJson.data?.dataByFanstype ?? [];
      const firstFans = dataByFanstype[0];
      const dataByTabtype = firstFans?.dataByTabtype ?? feedJson.data?.feedData?.[0]?.dataByTabtype ?? [];
      const tabAll = dataByTabtype.find((t) => t.tabTypeName === '全部' || t.tabType === 999);
      if (isTestWork) {
        logger.info(
          `[WX WorkStats] workId=${work.id} dataByTabtype.length=${dataByTabtype.length} tabAll=${!!tabAll} tabAll.tabTypeName=${tabAll?.tabTypeName}`
        );
      }
      if (!tabAll?.data) continue;

      const data = tabAll.data;
      const browse = data.browse ?? [];
      const like = data.like ?? [];
      const comment = data.comment ?? [];
      if (isTestWork) {
        logger.info(
          `[WX WorkStats] workId=${work.id} 「全部」data: browse.length=${browse.length} like.length=${like.length} comment.length=${comment.length}`
        );
        logger.info(`[WX WorkStats] workId=${work.id} browse=${JSON.stringify(browse)}`);
        logger.info(`[WX WorkStats] workId=${work.id} like=${JSON.stringify(like)}`);
        logger.info(`[WX WorkStats] workId=${work.id} comment=${JSON.stringify(comment)}`);
      }

      const len = Math.max(browse.length, like.length, comment.length);
      if (len === 0) continue;

      const patches: Array<{
        workId: number;
        recordDate: Date;
        playCount?: number;
        likeCount?: number;
        commentCount?: number;
      }> = [];

      for (let i = 0; i < len; i++) {
        const recordDate = new Date(startDate);
        recordDate.setDate(recordDate.getDate() + i);
        recordDate.setHours(0, 0, 0, 0);
        if (recordDate > endDate) break;

        patches.push({
          workId: work.id,
          recordDate,
          playCount: toInt(browse[i], 0),
          likeCount: toInt(like[i], 0),
          commentCount: toInt(comment[i], 0),
        });
      }

      if (isTestWork) {
        logger.info(`[WX WorkStats] workId=${work.id} 生成 patches.length=${patches.length} 前3条=${JSON.stringify(patches.slice(0, 3))}`);
      }
      if (patches.length) {
        const result = await this.workDayStatisticsService.saveStatisticsForDateBatch(patches);
        if (isTestWork) {
          logger.info(`[WX WorkStats] workId=${work.id} saveStatisticsForDateBatch inserted=${result.inserted} updated=${result.updated}`);
        }
        totalInserted += result.inserted;
        totalUpdated += result.updated;
      }
    }

    logger.info(
      `[WX WorkStats] accountId=${account.id} completed. inserted=${totalInserted} updated=${totalUpdated}`
    );
  }
}