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 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';
};

type MetricKind =
  | 'playCount'
  | 'likeCount'
  | 'commentCount'
  | 'shareCount'
  | 'collectCount'
  | 'fansIncrease'
  | 'coverClickRate'
  | 'avgWatchDuration'
  | 'totalWatchDuration'
  | 'completionRate';

type ExportMode = 'watch' | 'interaction' | 'fans';

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();
  // 2026年01月27日
  const m1 = s.match(/(\d{4})\D(\d{1,2})\D(\d{1,2})\D?/);
  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 detectMetricKind(sheetName: string): MetricKind | null {
  const n = sheetName.trim();
  // 观看数据：子表命名可能是「观看趋势」或「观看数趋势」
  if (n.includes('观看趋势') || n.includes('观看数')) return 'playCount';
  if (n.includes('封面点击率')) return 'coverClickRate';
  if (n.includes('平均观看时长')) return 'avgWatchDuration';
  if (n.includes('观看总时长')) return 'totalWatchDuration';
  if (n.includes('完播率')) return 'completionRate';

  // 互动数据
  if (n.includes('点赞') && n.includes('趋势')) return 'likeCount';
  if (n.includes('评论') && n.includes('趋势')) return 'commentCount';
  if (n.includes('分享') && n.includes('趋势')) return 'shareCount';
  if (n.includes('收藏') && n.includes('趋势')) return 'collectCount';

  // 涨粉数据（只取净涨粉趋势）
  if (n.includes('净涨粉') && n.includes('趋势')) return 'fansIncrease';
  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.xiaohongshu.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.xiaohongshu.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（XHS_STORAGE_STATE_BOOTSTRAP=1 且 XHS_IMPORT_HEADLESS=0）才允许 headful
  const allowHeadfulForBootstrap = process.env.XHS_STORAGE_STATE_BOOTSTRAP === '1' && process.env.XHS_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 parseXhsExcel(
  filePath: string,
  mode: ExportMode
): Map<string, { recordDate: Date } & Record<string, any>> {
  const wb = XLSX.readFile(filePath);
  const result = new Map<string, { recordDate: Date } & Record<string, any>>();

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

  for (const sheetName of wb.SheetNames) {
    const kind = detectMetricKind(sheetName);
    if (!kind) continue;

    // 按导出类型过滤不相关子表，避免误写字段
    if (
      (mode === 'watch' &&
        !['playCount', 'coverClickRate', 'avgWatchDuration', 'totalWatchDuration', 'completionRate'].includes(kind)) ||
      (mode === 'interaction' && !['likeCount', 'commentCount', 'shareCount', 'collectCount'].includes(kind)) ||
      (mode === 'fans' && kind !== 'fansIncrease')
    ) {
      continue;
    }

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

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

    for (const row of rows) {
      const dateVal = row['日期'] ?? row['date'] ?? row['Date'] ?? row[Object.keys(row)[0] ?? ''];
      const valueVal = row['数值'] ?? row['value'] ?? row['Value'] ?? row[Object.keys(row)[1] ?? ''];
      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)!;

      if (kind === 'playCount' || kind === 'likeCount' || kind === 'commentCount' || kind === 'shareCount' || kind === 'collectCount' || kind === 'fansIncrease') {
        const n = parseChineseNumberLike(valueVal);
        if (typeof n === 'number') {
          if (kind === 'playCount') obj.playCount = n;
          if (kind === 'likeCount') obj.likeCount = n;
          if (kind === 'commentCount') obj.commentCount = n;
          if (kind === 'shareCount') obj.shareCount = n;
          if (kind === 'collectCount') obj.collectCount = n;
          if (kind === 'fansIncrease') obj.fansIncrease = n; // 允许负数
        }
      } else {
        const s = String(valueVal ?? '').trim();
        if (kind === 'coverClickRate') obj.coverClickRate = s || '0';
        if (kind === 'avgWatchDuration') obj.avgWatchDuration = s || '0';
        if (kind === 'totalWatchDuration') obj.totalWatchDuration = s || '0';
        if (kind === 'completionRate') obj.completionRate = s || '0';
      }
    }
  }

  return result;
}

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

  private downloadDir = path.resolve(process.cwd(), 'tmp', 'xhs-account-overview');
  private stateDir = path.resolve(process.cwd(), 'tmp', 'xhs-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：XHS_IMPORT_HEADLESS=0 且 XHS_STORAGE_STATE_BOOTSTRAP=1
    if (!(process.env.XHS_IMPORT_HEADLESS === '0' && process.env.XHS_STORAGE_STATE_BOOTSTRAP === '1')) {
      return null;
    }

    await ensureDir(this.stateDir);
    logger.warn(`[XHS 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.xiaohongshu.com/statistics/account/v2', { 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('账号概览') || t.includes('数据总览') || t.includes('观看数据');
        }, { timeout: 5 * 60_000 })
        .catch(() => undefined);

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

  /**
   * 为所有小红书账号导出“观看数据-近30日”并导入 user_day_statistics
   */
  async runDailyImportForAllXhsAccounts(): Promise<void> {
    await ensureDir(this.downloadDir);

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

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

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

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

  /**
   * 单账号：导出 Excel → 解析 → 入库 → 删除文件
   */
  async importAccountLast30Days(account: PlatformAccount): 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();
      await page.goto('https://creator.xiaohongshu.com/statistics/account/v2', { waitUntil: 'domcontentloaded' });
      await page.waitForTimeout(1500);

      if (page.url().includes('login')) {
        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”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('数据权限申请中') || bodyText.includes('次日再来查看')) {
        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: 'xiaohongshu' },
        });
        wsManager.sendToUser(account.userId, WS_EVENTS.SYSTEM_MESSAGE, {
          level: 'warning',
          message: `小红书账号「${account.accountName || account.accountId || account.id}」暂无数据看板访问权限，请到小红书创作服务平台申请数据权限（通过后一般次日生效）。`,
          platform: 'xiaohongshu',
          accountId: account.id,
        });
        throw new Error('小红书数据看板暂无访问权限/申请中，已标记 expired 并通知用户');
      }

      // 统一入口：账号概览 -> 笔记数据
      await page.getByText('账号概览', { exact: true }).first().click().catch(() => undefined);
      await page.getByText('笔记数据', { exact: true }).first().click();

      const exportAndImport = async (tabText: '观看数据' | '互动数据' | '涨粉数据', mode: ExportMode) => {
        await page.getByText(tabText, { exact: true }).first().click();
        await page.getByText(/近\d+日/).first().click().catch(() => undefined);
        await page.getByText('近30日', { exact: true }).click();
        await page.waitForTimeout(1200);

        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);

        let perDay = new Map<string, { recordDate: Date } & Record<string, any>>();
        let inserted = 0;
        let updated = 0;
        try {
          perDay = parseXhsExcel(filePath, mode);
          for (const v of perDay.values()) {
            const { recordDate, ...patch } = v;
            const r = await this.userDayStatisticsService.saveStatisticsForDate(account.id, recordDate, patch);
            inserted += r.inserted;
            updated += r.updated;
          }

          logger.info(
            `[XHS Import] ${tabText} imported. accountId=${account.id} days=${perDay.size} inserted=${inserted} updated=${updated}`
          );
        } finally {
          // 默认导入后删除 Excel，避免磁盘堆积；仅在显式 KEEP_XHS_XLSX=true 时保留（用于调试）
          if (process.env.KEEP_XHS_XLSX === 'true') {
            logger.warn(`[XHS Import] KEEP_XHS_XLSX=true, keep file: ${filePath}`);
          } else {
            await fs.unlink(filePath).catch(() => undefined);
          }
        }
      };

      // 1) 观看数据：播放数 + 点击率/时长/完播率
      await exportAndImport('观看数据', 'watch');

      // 2) 互动数据：点赞/评论/收藏/分享
      await exportAndImport('互动数据', 'interaction');

      // 3) 涨粉数据：只取“净涨粉趋势”（解析器已过滤）
      await exportAndImport('涨粉数据', 'fans');

      logger.info(`[XHS Import] Account all tabs done. accountId=${account.id}`);

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