/**
 * 店小秘全自动登录 v3
 * 直接调 AJAX API 登录，改进 OCR 预处理
 */
import { chromium } from 'playwright';
import { writeFileSync, readFileSync, existsSync, mkdirSync } from 'fs';
import { execSync } from 'child_process';
import sharp from 'sharp';

const COOKIE_FILE = './cookies.json';
const SCREENSHOTS_DIR = './screenshots';
const MAX_RETRIES = 15;
const DOWNLOAD_DIR = './downloads';

mkdirSync(SCREENSHOTS_DIR, { recursive: true });
mkdirSync(DOWNLOAD_DIR, { recursive: true });

// ====== 多种预处理方案尝试 OCR ======
async function ocrCaptcha(page) {
  const captchaImg = await page.$('#verifyImgCode');
  if (!captchaImg) return null;

  const rawPath = `${SCREENSHOTS_DIR}/captcha_raw.png`;
  await captchaImg.screenshot({ path: rawPath });

  const presets = [
    // 方案1：灰度 + 放大 + 二值化（中阈值）
    async (src, dst) => {
      await sharp(src).grayscale().resize({ width: 468 }).normalize().sharpen({ sigma: 1.5 }).threshold(130).toFile(dst);
    },
    // 方案2：灰度 + 放大 + 低阈值
    async (src, dst) => {
      await sharp(src).grayscale().resize({ width: 468 }).normalize().threshold(100).toFile(dst);
    },
    // 方案3：灰度 + 放大 + 高阈值
    async (src, dst) => {
      await sharp(src).grayscale().resize({ width: 468 }).normalize().threshold(160).toFile(dst);
    },
    // 方案4：原图直接放大
    async (src, dst) => {
      await sharp(src).resize({ width: 468 }).toFile(dst);
    },
    // 方案5：灰度 + 反色 + 二值化
    async (src, dst) => {
      await sharp(src).grayscale().resize({ width: 468 }).negate().normalize().threshold(128).toFile(dst);
    },
  ];

  const psmModes = ['7', '8', '13']; // 单行、单词、单行原始

  for (let i = 0; i < presets.length; i++) {
    const processedPath = `${SCREENSHOTS_DIR}/captcha_p${i}.png`;
    try {
      await presets[i](rawPath, processedPath);
    } catch (e) { continue; }

    for (const psm of psmModes) {
      try {
        const result = execSync(
          `tesseract "${processedPath}" stdout --psm ${psm} -c tessedit_char_whitelist=0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ`,
          { encoding: 'utf-8', timeout: 10000 }
        ).trim().replace(/[\s\n\r]/g, '');

        if (result && result.length === 4) {
          console.log(`  OCR [方案${i + 1}, psm${psm}]: "${result}"`);
          return result;
        }
      } catch (e) {}
    }
  }

  // 实在不行，返回任何 >= 4 字符的结果
  for (let i = 0; i < presets.length; i++) {
    const processedPath = `${SCREENSHOTS_DIR}/captcha_p${i}.png`;
    if (!existsSync(processedPath)) continue;
    try {
      const result = execSync(
        `tesseract "${processedPath}" stdout --psm 7 -c tessedit_char_whitelist=0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ`,
        { encoding: 'utf-8', timeout: 10000 }
      ).trim().replace(/[\s\n\r]/g, '');
      if (result && result.length >= 4) {
        console.log(`  OCR [fallback 方案${i + 1}]: "${result}" (取前4字符)`);
        return result.substring(0, 4);
      }
    } catch (e) {}
  }

  console.log('  OCR 全部失败');
  return null;
}

// ====== 主流程 ======
async function main() {
  console.log('====== 店小秘全自动登录 v3 ======\n');

  const browser = await chromium.launch({
    headless: true,
    args: ['--no-sandbox'],
  });

  const context = await browser.newContext({
    viewport: { width: 1920, height: 1080 },
    locale: 'zh-CN',
    userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36',
  });

  const page = await context.newPage();

  try {
    // 先试 Cookie
    if (existsSync(COOKIE_FILE)) {
      console.log('>> 尝试复用 Cookie...');
      const cookies = JSON.parse(readFileSync(COOKIE_FILE, 'utf-8'));
      await context.addCookies(cookies);

      // 访问一个需要登录的页面来验证
      const resp = await page.goto('https://www.dianxiaomi.com/saleManage/index.htm', {
        waitUntil: 'domcontentloaded', timeout: 20000
      }).catch(() => null);

      const url = page.url();
      const title = await page.title();
      if (resp && !url.includes('/home.htm') && !url.includes('/index.htm') && !title.includes('Error')) {
        console.log('>> Cookie 有效！直接进入后台');
        return { success: true, page, context, browser };
      }
      console.log('>> Cookie 无效，重新登录\n');
    }

    // 打开登录页
    await page.goto('https://www.dianxiaomi.com/home.htm', { waitUntil: 'networkidle', timeout: 30000 });

    for (let attempt = 1; attempt <= MAX_RETRIES; attempt++) {
      console.log(`\n>> 第 ${attempt}/${MAX_RETRIES} 次尝试...`);

      // 刷新验证码
      if (attempt > 1) {
        await page.evaluate(() => {
          const img = document.getElementById('verifyImgCode');
          if (img) img.src = '/verify/code.htm?t=' + Date.now();
        });
        await page.waitForTimeout(1500);
      }

      // 填写表单
      await page.fill('input[name="account"]', 'MiLe-kf01');
      await page.fill('input[name="password"]', 'Vxdas@302');

      // OCR 验证码
      const code = await ocrCaptcha(page);
      if (!code) {
        console.log('  跳过本次');
        continue;
      }

      await page.fill('#verifyCode', code);

      // 用 AJAX API 提交登录
      const loginResult = await page.evaluate(async (verifyCode) => {
        const formData = new FormData();
        formData.append('account', 'MiLe-kf01');
        formData.append('password', 'Vxdas@302');
        formData.append('verifyCode', verifyCode);
        formData.append('remeber', 'on');

        try {
          const resp = await fetch('/user/userLoginNew2.json', {
            method: 'POST',
            body: formData,
          });
          return await resp.json();
        } catch (e) {
          return { code: -999, error: e.message };
        }
      }, code);

      console.log(`  API 响应: ${JSON.stringify(loginResult)}`);

      if (loginResult.code === 0 || loginResult.code === 1) {
        console.log('\n>> ★★★ 登录成功！★★★');
        console.log(`>> 跳转 URL: ${loginResult.url}`);

        // 跳转到后台
        if (loginResult.url) {
          await page.goto('https://www.dianxiaomi.com' + loginResult.url, {
            waitUntil: 'networkidle', timeout: 30000
          });
        } else {
          await page.goto('https://www.dianxiaomi.com/saleManage/index.htm', {
            waitUntil: 'networkidle', timeout: 30000
          });
        }

        // 保存 Cookie
        const cookies = await context.cookies();
        writeFileSync(COOKIE_FILE, JSON.stringify(cookies, null, 2));
        console.log(`>> Cookie 已保存（${cookies.length} 条）`);

        return { success: true, page, context, browser };
      }

      // 登录失败
      const errorMsg = loginResult.error || '未知错误';
      console.log(`  失败: ${errorMsg}`);

      if (errorMsg.includes('账号') || errorMsg.includes('密码') || errorMsg.includes('不存在')) {
        console.log('>> 账号或密码错误，停止重试');
        break;
      }
      // 验证码错误继续重试
    }

    console.log('\n>> 登录失败');
    await browser.close();
    return { success: false };

  } catch (err) {
    console.error('致命错误:', err.message);
    await browser.close();
    return { success: false };
  }
}

// ====== 探索后台 ======
async function explore(page) {
  console.log('\n>> ===== 探索后台页面 =====');
  console.log('>> URL:', page.url());
  console.log('>> 标题:', await page.title());

  await page.screenshot({ path: `${SCREENSHOTS_DIR}/backend.png`, fullPage: true });

  // 获取页面文本
  const bodyText = await page.evaluate(() => document.body?.innerText?.substring(0, 5000));
  console.log('>> 页面内容:\n', bodyText);

  // 左侧菜单
  const menuItems = await page.$$eval(
    '.sidebar a, .menu a, .nav a, .left-menu a, [class*="sidebar"] a, [class*="menu"] a, a[href*="Manage"], a[href*="manage"]',
    els => els.map(el => ({
      text: el.textContent.trim().replace(/\s+/g, ' ').substring(0, 50),
      href: el.href,
    })).filter(e => e.text && e.href.includes('dianxiaomi'))
    .filter((e, i, arr) => arr.findIndex(a => a.href === e.href) === i)
  );

  console.log('\n>> 菜单链接:');
  for (const m of menuItems) {
    console.log(`  [${m.text}] -> ${m.href}`);
  }

  // 所有链接
  const allLinks = await page.$$eval('a', els =>
    els.map(el => ({
      text: el.textContent.trim().replace(/\s+/g, ' ').substring(0, 60),
      href: el.href,
    }))
    .filter(e => e.text && e.href && e.href.includes('dianxiaomi'))
    .filter((e, i, arr) => arr.findIndex(a => a.href === e.href) === i)
  );

  console.log(`\n>> 全部链接（${allLinks.length} 个）：`);
  for (const l of allLinks) {
    const tag = (l.text.includes('采购') || l.text.includes('仓库') || l.text.includes('导出') ||
                 l.text.includes('库存') || l.text.includes('备货') || l.text.includes('建议')) ? '★' : ' ';
    console.log(`  ${tag} [${l.text}] ${l.href}`);
  }

  // 尝试常见后台路径
  const paths = [
    '/saleManage/index.htm',
    '/purchaseManage/purchaseSuggestion.htm',
    '/purchaseManage/purchaseOrder.htm',
    '/purchaseManage/index.htm',
    '/stockManage/stockList.htm',
    '/stockManage/index.htm',
    '/warehouseManage/index.htm',
    '/warehouseManage/stockList.htm',
  ];

  console.log('\n>> 尝试后台路径：');
  for (const p of paths) {
    const url = `https://www.dianxiaomi.com${p}`;
    try {
      await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 10000 });
      const finalUrl = page.url();
      const title = await page.title();
      const isError = title.includes('Error') || finalUrl.includes('/home.htm');
      console.log(`  ${isError ? '✗' : '✓'} ${p} -> [${title}] ${finalUrl}`);

      if (!isError) {
        await page.screenshot({ path: `${SCREENSHOTS_DIR}/page${p.replace(/\//g, '_')}.png`, fullPage: true });
        // 在该页面查找导出按钮
        const exportInfo = await page.$$eval('*', els =>
          els.filter(el => {
            const t = el.textContent?.trim();
            return t && (t === '导出' || t === '导出全部' || t === '导出建议' ||
                         t.includes('导出') || t.includes('下载'));
          }).map(el => ({
            tag: el.tagName,
            text: el.textContent.trim().substring(0, 40),
            id: el.id,
            className: (el.className || '').substring(0, 50),
          })).filter(e => ['A', 'BUTTON', 'SPAN', 'INPUT', 'DIV'].includes(e.tag))
          .slice(0, 15)
        );
        if (exportInfo.length) {
          console.log(`    导出按钮：`);
          exportInfo.forEach(e => console.log(`      ${e.tag}#${e.id}.${e.className}: "${e.text}"`));
        }
      }
    } catch (e) {
      console.log(`  ✗ ${p} -> 超时`);
    }
  }
}

// ====== 执行 ======
const result = await main();
if (result.success) {
  await explore(result.page);
  await result.browser.close();
} else {
  process.exit(1);
}