import fs from 'node:fs/promises';
import path from 'node:path';
import { chromium, type Browser } from 'playwright';
import * as XLSXNS from 'xlsx';
import { AppDataSource, PlatformAccount } from '../models/index.js';
import { BrowserManager } from '../automation/browser.js';
import { logger } from '../utils/logger.js';
import { UserDayStatisticsService } from './UserDayStatisticsService.js';
import { AccountService } from './AccountService.js';
import type { ProxyConfig } from '@media-manager/shared';
import { WS_EVENTS } from '@media-manager/shared';
import { wsManager } from '../websocket/index.js';

// xlsx 在 ESM 下可能挂在 default 上；这里做一次兼容兜底
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const XLSX: any = (XLSXNS as any).default ?? (XLSXNS as any);

type PlaywrightCookie = {
  name: string;
  value: string;
  domain?: string;
  path?: string;
  url?: string;
  expires?: number;
  httpOnly?: boolean;
  secure?: boolean;
  sameSite?: 'Lax' | 'None' | 'Strict';
};

function ensureDir(p: string) {
  return fs.mkdir(p, { recursive: true });
}

function normalizeDateText(input: unknown): Date | null {
  if (!input) return null;
  if (input instanceof Date && !Number.isNaN(input.getTime())) {
    const d = new Date(input);
    d.setHours(0, 0, 0, 0);
    return d;
  }
  const s = String(input).trim();
  if (!s) return null;

  // 2026-01-27 / 2026/01/27
  const m1 = s.match(/(\d{4})\D(\d{1,2})\D(\d{1,2})/);
  if (m1) {
    const yyyy = Number(m1[1]);
    const mm = Number(m1[2]);
    const dd = Number(m1[3]);
    if (!yyyy || !mm || !dd) return null;
    const d = new Date(yyyy, mm - 1, dd);
    d.setHours(0, 0, 0, 0);
    return d;
  }

  // 01-27（兜底：用当前年份）
  const m2 = s.match(/^(\d{1,2})[-/](\d{1,2})$/);
  if (m2) {
    const yyyy = new Date().getFullYear();
    const mm = Number(m2[1]);
    const dd = Number(m2[2]);
    const d = new Date(yyyy, mm - 1, dd);
    d.setHours(0, 0, 0, 0);
    return d;
  }

  return null;
}

function parseChineseNumberLike(input: unknown): number | null {
  if (input === null || input === undefined) return null;
  const s = String(input).trim();
  if (!s) return null;
  // 8,077
  const plain = s.replace(/,/g, '');
  // 4.8万
  const wan = plain.match(/^(\d+(\.\d+)?)\s*万$/);
  if (wan) return Math.round(Number(wan[1]) * 10000);
  const yi = plain.match(/^(\d+(\.\d+)?)\s*亿$/);
  if (yi) return Math.round(Number(yi[1]) * 100000000);
  const n = Number(plain.replace(/[^\d.-]/g, ''));
  if (Number.isFinite(n)) return Math.round(n);
  return null;
}

function parseCookiesFromAccount(cookieData: string | null): PlaywrightCookie[] {
  if (!cookieData) return [];
  const raw = cookieData.trim();
  if (!raw) return [];

  // 1) JSON array（最常见：浏览器插件导出/前端保存）
  if (raw.startsWith('[') || raw.startsWith('{')) {
    try {
      const parsed = JSON.parse(raw);
      const arr = Array.isArray(parsed) ? parsed : (parsed?.cookies ? parsed.cookies : []);
      if (!Array.isArray(arr)) return [];
      return arr
        .map((c: any) => {
          const name = String(c?.name ?? '').trim();
          const value = String(c?.value ?? '').trim();
          if (!name) return null;
          const domain = c?.domain ? String(c.domain) : undefined;
          const pathVal = c?.path ? String(c.path) : '/';
          const url = !domain ? 'https://creator.douyin.com' : undefined;
          const sameSiteRaw = c?.sameSite;
          const sameSite =
            sameSiteRaw === 'Lax' || sameSiteRaw === 'None' || sameSiteRaw === 'Strict'
              ? sameSiteRaw
              : undefined;

          return {
            name,
            value,
            domain,
            path: pathVal,
            url,
            expires: typeof c?.expires === 'number' ? c.expires : undefined,
            httpOnly: typeof c?.httpOnly === 'boolean' ? c.httpOnly : undefined,
            secure: typeof c?.secure === 'boolean' ? c.secure : undefined,
            sameSite,
          } satisfies PlaywrightCookie;
        })
        .filter(Boolean) as PlaywrightCookie[];
    } catch {
      // fallthrough
    }
  }

  // 2) "a=b; c=d" 拼接格式
  const pairs = raw.split(';').map((p) => p.trim()).filter(Boolean);
  const cookies: PlaywrightCookie[] = [];
  for (const p of pairs) {
    const idx = p.indexOf('=');
    if (idx <= 0) continue;
    const name = p.slice(0, idx).trim();
    const value = p.slice(idx + 1).trim();
    if (!name) continue;
    cookies.push({ name, value, url: 'https://creator.douyin.com' });
  }
  return cookies;
}

async function createBrowserForAccount(proxy: ProxyConfig | null): Promise<{ browser: Browser; shouldClose: boolean }> {
  // 静默同步：默认一律 headless，不弹窗
  // 只有在“引导登录/验证”时（DY_STORAGE_STATE_BOOTSTRAP=1 且 DY_IMPORT_HEADLESS=0）才允许 headful
  const allowHeadfulForBootstrap = process.env.DY_STORAGE_STATE_BOOTSTRAP === '1' && process.env.DY_IMPORT_HEADLESS === '0';
  const headless = !allowHeadfulForBootstrap;
  if (proxy?.enabled) {
    const server = `${proxy.type}://${proxy.host}:${proxy.port}`;
    const browser = await chromium.launch({
      headless,
      proxy: {
        server,
        username: proxy.username,
        password: proxy.password,
      },
      args: ['--no-sandbox', '--disable-setuid-sandbox', '--disable-dev-shm-usage', '--disable-gpu', '--window-size=1920,1080'],
    });
    return { browser, shouldClose: true };
  }
  const browser = await BrowserManager.getBrowser({ headless });
  return { browser, shouldClose: false };
}

function parseDouyinExcel(
  filePath: string
): Map<string, { recordDate: Date } & Record<string, any>> {
  const wb = XLSX.readFile(filePath);
  const result = new Map<string, { recordDate: Date } & Record<string, any>>();

  logger.info(
    `[DY Import] Excel loaded. file=${path.basename(filePath)} sheets=${wb.SheetNames.join(' | ')}`
  );

  for (const sheetName of wb.SheetNames) {
    const sheet = wb.Sheets[sheetName];
    const rows = XLSX.utils.sheet_to_json<Record<string, any>>(sheet, { defval: '' });

    if (!rows.length) {
      logger.warn(`[DY Import] Sheet empty. name=${sheetName}`);
      continue;
    }

    const keys = Object.keys(rows[0] || {});
    logger.info(`[DY Import] Sheet parsed. name=${sheetName} rows=${rows.length} keys=${keys.join(',')}`);

    const normalizeKey = (k: string) => k.replace(/^\uFEFF/, '').trim();

    for (const row of rows) {
      const rawKeys = Object.keys(row || {});
      if (!rawKeys.length) continue;
      const keysNormalized = rawKeys.map((k) => ({ raw: k, norm: normalizeKey(k) }));

      // 兼容 Excel 表头带 BOM/空格：优先找包含“日期”的列作为日期列
      const dateKey =
        keysNormalized.find((k) => k.norm === '日期')?.raw ??
        keysNormalized.find((k) => k.norm.includes('日期'))?.raw ??
        keysNormalized.find((k) => k.norm.toLowerCase() === 'date')?.raw ??
        keysNormalized[0]!.raw;

      const dateVal = (row as any)[dateKey];

      const d = normalizeDateText(dateVal);
      if (!d) continue;

      const key = `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
      if (!result.has(key)) result.set(key, { recordDate: d });
      const obj = result.get(key)!;

      // 抖音导出的 Excel 通常是两列：日期 + 指标名（如“作品分享/净增粉丝/作品点赞/播放量...”）
      // 因此优先按“第二列标题”做自动映射，避免漏掉“沈凉音”这种全量导出格式。
      const metricKeyRaw = keysNormalized.find((k) => k.raw !== dateKey)?.raw;
      if (!metricKeyRaw) continue;
      const metricKey = normalizeKey(metricKeyRaw);

      // 显式排除：主页访问 / 取关粉丝
      if (metricKey.includes('主页访问') || metricKey.includes('取关粉丝')) continue;

      const rawVal = (row as any)[metricKeyRaw];
      if (rawVal === undefined || rawVal === null) continue;

      // 1）封面点击率：字符串百分比直接存
      if (metricKey.includes('封面点击率')) {
        const s = String(rawVal).trim();
        if (s) (obj as any).coverClickRate = s;
        continue;
      }

      // 2）其余按数值解析
      const n = parseChineseNumberLike(rawVal);
      if (typeof n !== 'number') continue;

      if (metricKey.includes('播放')) (obj as any).playCount = n;
      else if (metricKey.includes('点赞')) (obj as any).likeCount = n;
      else if (metricKey.includes('评论')) (obj as any).commentCount = n;
      else if (metricKey.includes('分享')) (obj as any).shareCount = n;
      else if (metricKey.includes('净增粉丝') || metricKey.includes('新增粉丝')) (obj as any).fansIncrease = n;
      // 总粉丝数/总粉丝量：入库 fans_count
      else if (metricKey.includes('总粉丝')) (obj as any).fansCount = n;
    }
  }

  return result;
}

export class DouyinAccountOverviewImportService {
  private accountRepository = AppDataSource.getRepository(PlatformAccount);
  private userDayStatisticsService = new UserDayStatisticsService();

  private downloadDir = path.resolve(process.cwd(), 'tmp', 'douyin-account-overview');
  private stateDir = path.resolve(process.cwd(), 'tmp', 'douyin-storage-state');

  private getStatePath(accountId: number) {
    return path.join(this.stateDir, `${accountId}.json`);
  }

  private async ensureStorageState(account: PlatformAccount, cookies: PlaywrightCookie[]): Promise<string | null> {
    const statePath = this.getStatePath(account.id);
    try {
      await fs.access(statePath);
      return statePath;
    } catch {
      // no state
    }

    // 需要你在弹出的浏览器里完成一次登录/验证，然后脚本会自动保存 storageState
    // 启用方式：DY_IMPORT_HEADLESS=0 且 DY_STORAGE_STATE_BOOTSTRAP=1
    if (!(process.env.DY_IMPORT_HEADLESS === '0' && process.env.DY_STORAGE_STATE_BOOTSTRAP === '1')) {
      return null;
    }

    await ensureDir(this.stateDir);
    logger.warn(
      `[DY Import] No storageState for accountId=${account.id}. Bootstrapping... 请在弹出的浏览器中完成登录/验证。`
    );

    const { browser, shouldClose } = await createBrowserForAccount(account.proxyConfig);
    try {
      const context = await browser.newContext({
        viewport: { width: 1920, height: 1080 },
        locale: 'zh-CN',
        timezoneId: 'Asia/Shanghai',
      });
      await context.addCookies(cookies as any);
      const page = await context.newPage();
      await page.goto('https://creator.douyin.com/creator-micro/data-center/operation', {
        waitUntil: 'domcontentloaded',
      });

      // 最长等 5 分钟：让你手动完成登录/滑块/短信等
      await page
        .waitForFunction(() => {
          const t = document.body?.innerText || '';
          return t.includes('数据中心') || t.includes('账号总览') || t.includes('短视频');
        }, { timeout: 5 * 60_000 })
        .catch(() => undefined);

      await context.storageState({ path: statePath });
      logger.info(`[DY Import] storageState saved: ${statePath}`);
      await context.close();
      return statePath;
    } finally {
      if (shouldClose) await browser.close().catch(() => undefined);
    }
  }

  /**
   * 统一入口：定时任务与添加账号均调用此方法，执行“账号总览-短视频-数据表现-近30天”
   */
  static async runDailyImport(): Promise<void> {
    const svc = new DouyinAccountOverviewImportService();
    await svc.runDailyImportForAllDouyinAccounts();
  }

  /**
   * 为所有抖音账号导出“账号总览-短视频-数据表现-近30天”并导入 user_day_statistics
   */
  async runDailyImportForAllDouyinAccounts(): Promise<void> {
    await ensureDir(this.downloadDir);

    const accounts = await this.accountRepository.find({
      where: { platform: 'douyin' as any },
    });

    logger.info(`[DY Import] Start. total_accounts=${accounts.length}`);

    for (const account of accounts) {
      try {
        await this.importAccountLast30Days(account);
      } catch (e) {
        logger.error(
          `[DY Import] Account failed. accountId=${account.id} name=${account.accountName || ''}`,
          e
        );
      }
    }

    logger.info('[DY Import] Done.');
  }

  /**
   * 单账号：导出 Excel → 解析 → 入库 → 删除文件
   */
  async importAccountLast30Days(account: PlatformAccount, isRetry = false): Promise<void> {
    const cookies = parseCookiesFromAccount(account.cookieData);
    if (!cookies.length) {
      throw new Error('cookieData 为空或无法解析');
    }

    const { browser, shouldClose } = await createBrowserForAccount(account.proxyConfig);
    try {
      const statePath = await this.ensureStorageState(account, cookies);
      const context = await browser.newContext({
        acceptDownloads: true,
        viewport: { width: 1920, height: 1080 },
        locale: 'zh-CN',
        timezoneId: 'Asia/Shanghai',
        userAgent:
          'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
        ...(statePath ? { storageState: statePath } : {}),
      });
      context.setDefaultTimeout(60_000);
      // 如果没 state，就退回 cookie-only（可能导出为 0）
      if (!statePath) {
        await context.addCookies(cookies as any);
      }

      const page = await context.newPage();
      logger.info(`[DY Import] accountId=${account.id} goto data-center...`);
      await page.goto('https://creator.douyin.com/creator-micro/data-center/operation', {
        waitUntil: 'domcontentloaded',
      });
      await page.waitForTimeout(1500);

      if (page.url().includes('login')) {
        // 第一次检测到登录失效时，尝试刷新账号
        if (!isRetry) {
          logger.info(`[DY Import] Login expired detected for account ${account.id}, attempting to refresh...`);
          await context.close();
          if (shouldClose) await browser.close();
          
          try {
            const accountService = new AccountService();
            const refreshResult = await accountService.refreshAccount(account.userId, account.id);
            
            if (refreshResult.needReLogin) {
              // 刷新后仍需要重新登录，走原先的失效流程
              logger.warn(`[DY Import] Account ${account.id} refresh failed, still needs re-login`);
              throw new Error('未登录/需要重新登录（跳转到 login）');
            }
            
            // 刷新成功，重新获取账号信息并重试导入
            logger.info(`[DY Import] Account ${account.id} refreshed successfully, retrying import...`);
            const refreshedAccount = await this.accountRepository.findOne({ where: { id: account.id } });
            if (!refreshedAccount) {
              throw new Error('账号刷新后未找到');
            }
            
            // 递归调用，标记为重试
            return await this.importAccountLast30Days(refreshedAccount, true);
          } catch (refreshError) {
            logger.error(`[DY Import] Account ${account.id} refresh failed:`, refreshError);
            throw new Error('未登录/需要重新登录（跳转到 login）');
          }
        } else {
          // 已经是重试了，不再尝试刷新
          throw new Error('未登录/需要重新登录（跳转到 login）');
        }
      }

      // 检测“暂无访问权限 / 权限申请中 / 暂无数据”提示：标记账号 expired + 推送提示
      const bodyText = (await page.textContent('body').catch(() => '')) || '';
      if (
        bodyText.includes('暂无访问权限') ||
        bodyText.includes('权限申请中') ||
        bodyText.includes('暂无数据权限') ||
        bodyText.includes('暂无数据，请稍后再试')
      ) {
        await this.accountRepository.update(account.id, { status: 'expired' as any });
        wsManager.sendToUser(account.userId, WS_EVENTS.ACCOUNT_UPDATED, {
          account: { id: account.id, status: 'expired', platform: 'douyin' },
        });
        wsManager.sendToUser(account.userId, WS_EVENTS.SYSTEM_MESSAGE, {
          level: 'warning',
          message: `抖音账号「${account.accountName || account.accountId || account.id}」暂无数据看板访问权限，请到抖音创作者中心申请数据权限（通过后一般次日生效）。`,
          platform: 'douyin',
          accountId: account.id,
        });
        throw new Error('抖音数据看板暂无访问权限/申请中，已标记 expired 并通知用户');
      }

      // 已直达账号总览页（data-center/operation），无需再点「数据中心/账号总览」，直接点「短视频」和「近30天」
      await page.waitForTimeout(500);
      logger.info(`[DY Import] accountId=${account.id} on 账号总览页, click 短视频 tab (#semiTabaweme)...`);
      const shortVideoById = page.locator('#semiTabaweme');
      if ((await shortVideoById.count().catch(() => 0)) > 0) {
        await shortVideoById.first().click();
      } else {
        const shortVideoCandidates = ['短视频', '短视频数据'];
        let shortVideoClicked = false;
        for (const text of shortVideoCandidates) {
          const loc = page.getByText(text, { exact: false }).first();
          if ((await loc.count().catch(() => 0)) > 0) {
            await loc.click().catch(() => undefined);
            shortVideoClicked = true;
            break;
          }
        }
        if (!shortVideoClicked) {
          throw new Error('页面上未找到「短视频」入口，请确认抖音创作者后台是否改版');
        }
      }

      // 切换“近30天”（优先用 ID #addon-aoc08fi，兜底文案）
      await page.waitForTimeout(500);
      logger.info(`[DY Import] accountId=${account.id} click 近30天 (#addon-aoc08fi)...`);
      const last30DaysById = page.locator('#addon-aoc08fi');
      if ((await last30DaysById.count().catch(() => 0)) > 0) {
        await last30DaysById.first().click();
      } else {
        await page.getByText(/近\d+天?/).first().click().catch(() => undefined);
        await page.getByText('近30天', { exact: true }).click();
      }
      await page.waitForTimeout(1200);

      // 逐个指标导出（排除：主页访问 / 取关粉丝）
      // 说明：抖音导出通常是“日期 + 指标”两列，每次只能导出当前选中的指标
      // 注意：抖音 UI 上“总粉丝”文案可能是「总粉丝量」而不是「总粉丝数」
      const metricsToExport: Array<{ name: string; candidates: string[] }> = [
        { name: '播放量', candidates: ['播放量'] },
        { name: '作品点赞', candidates: ['作品点赞', '点赞'] },
        { name: '作品评论', candidates: ['作品评论', '评论'] },
        { name: '作品分享', candidates: ['作品分享', '分享'] },
        { name: '封面点击率', candidates: ['封面点击率'] },
        { name: '净增粉丝', candidates: ['净增粉丝', '新增粉丝'] },
        { name: '总粉丝量', candidates: ['总粉丝量', '总粉丝数', '粉丝总量'] },
      ];

      let totalInserted = 0;
      let totalUpdated = 0;
      let mergedDays = new Map<string, { recordDate: Date } & Record<string, any>>();
      const savedExcelPaths: string[] = [];

      const clickMetric = async (metric: { name: string; candidates: string[] }) => {
        // 先精确匹配，失败后用包含匹配（适配 UI 文案差异）
        for (const c of metric.candidates) {
          const locatorExact = page.getByText(c, { exact: true }).first();
          const exactCount = await locatorExact.count().catch(() => 0);
          if (exactCount > 0) {
            await locatorExact.click().catch(() => undefined);
            await page.waitForTimeout(800);
            return c;
          }
        }
        for (const c of metric.candidates) {
          const locatorFuzzy = page.getByText(c, { exact: false }).first();
          const fuzzyCount = await locatorFuzzy.count().catch(() => 0);
          if (fuzzyCount > 0) {
            await locatorFuzzy.click().catch(() => undefined);
            await page.waitForTimeout(800);
            return c;
          }
        }
        logger.warn(`[DY Import] metric not found on page. accountId=${account.id} metric=${metric.name}`);
        return null;
      };

      for (const metric of metricsToExport) {
        logger.info(`[DY Import] accountId=${account.id} exporting metric: ${metric.name}...`);
        await clickMetric(metric);

        const [download] = await Promise.all([
          page.waitForEvent('download', { timeout: 60_000 }),
          page.getByText('导出数据', { exact: true }).first().click(),
        ]);

        const filename = `${account.id}_${Date.now()}_${download.suggestedFilename()}`;
        const filePath = path.join(this.downloadDir, filename);
        await download.saveAs(filePath);
        // 保留 Excel 不删除，便于核对数据；路径打日志方便查看
        const absolutePath = path.resolve(filePath);
        savedExcelPaths.push(absolutePath);
        logger.info(
          `[DY Import] Excel saved (${metric.name}): ${absolutePath}`
        );

        try {
          const perDay = parseDouyinExcel(filePath);
          // 合并不同指标到同一日期 patch（与小红书维度一致）
          for (const [k, v] of perDay.entries()) {
            if (!mergedDays.has(k)) mergedDays.set(k, { recordDate: v.recordDate });
            const base = mergedDays.get(k)!;
            Object.assign(base, v);
          }
          logger.info(
            `[DY Import] metric exported & parsed. accountId=${account.id} metric=${metric.name} file=${path.basename(filePath)} days=${perDay.size}`
          );
        } finally {
          // 默认导入后删除 Excel，避免磁盘堆积；仅在显式 KEEP_DY_XLSX=true 时保留（用于调试）
          if (process.env.KEEP_DY_XLSX === 'true') {
            logger.warn(`[DY Import] KEEP_DY_XLSX=true, keep file: ${filePath}`);
          } else {
            await fs.unlink(filePath).catch(() => undefined);
          }
        }
      }

      // 汇总：本账号导出的 7 个 Excel 已解析
      logger.info(
        `[DY Import] accountId=${account.id} 共 ${savedExcelPaths.length} 个 Excel 已解析`
      );
      if (savedExcelPaths.length !== 7) {
        logger.warn(`[DY Import] accountId=${account.id} 预期 7 个 Excel，实际 ${savedExcelPaths.length} 个`);
      }

      // 合并完成后统一入库（避免同一天多次 update）
      for (const v of mergedDays.values()) {
        const { recordDate, ...patch } = v;
        const r = await this.userDayStatisticsService.saveStatisticsForDate(account.id, recordDate, patch);
        totalInserted += r.inserted;
        totalUpdated += r.updated;
      }

      logger.info(
        `[DY Import] short-video imported. accountId=${account.id} days=${mergedDays.size} inserted=${totalInserted} updated=${totalUpdated}`
      );

      await context.close();
    } finally {
      if (shouldClose) {
        await browser.close().catch(() => undefined);
      }
    }
  }
}