#!/usr/bin/env node
/**
 * Playwright 浏览器工具集
 * 提供便捷的网页访问、截图、内容提取等功能
 */

import { chromium } from 'playwright';
import fs from 'fs';
import path from 'path';

/**
 * 访问网页并获取页面内容
 * @param {string} url - 要访问的URL
 * @param {Object} options - 配置选项
 * @returns {Object} 页面内容和截图
 */
export async function visitPage(url, options = {}) {
  const {
    headless = true,
    waitUntil = 'domcontentloaded',
    timeout = 30000,
    screenshot = true,
    screenshotPath = null,
    fullPage = false
  } = options;

  const browser = await chromium.launch({ headless });
  const context = await browser.newContext({
    userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36'
  });
  const page = await context.newPage();

  try {
    console.log(`🌐 正在访问: ${url}`);
    await page.goto(url, { waitUntil, timeout });

    // 获取页面标题
    const title = await page.title();
    console.log(`📄 页面标题: ${title}`);

    // 获取页面内容
    const content = await page.content();

    // 获取页面文本（简化版）
    const text = await page.evaluate(() => {
      return document.body.innerText;
    });

    let screenshotBuffer = null;
    if (screenshot) {
      screenshotBuffer = await page.screenshot({ fullPage });
      if (screenshotPath) {
        fs.writeFileSync(screenshotPath, screenshotBuffer);
        console.log(`📸 截图已保存: ${screenshotPath}`);
      }
    }

    return {
      success: true,
      url,
      title,
      content,
      text,
      screenshot: screenshotBuffer
    };

  } catch (error) {
    console.error(`❌ 访问失败: ${error.message}`);
    return {
      success: false,
      url,
      error: error.message
    };
  } finally {
    await browser.close();
  }
}

/**
 * 截取网页截图
 * @param {string} url - 网页URL
 * @param {string} outputPath - 输出路径
 * @param {Object} options - 配置选项
 */
export async function screenshot(url, outputPath, options = {}) {
  const result = await visitPage(url, {
    ...options,
    screenshot: true,
    screenshotPath: outputPath
  });
  return result;
}

/**
 * 提取网页文本内容
 * @param {string} url - 网页URL
 * @param {Object} options - 配置选项
 */
export async function extractText(url, options = {}) {
  const result = await visitPage(url, {
    ...options,
    screenshot: false
  });
  return result;
}

/**
 * 在页面上执行自定义操作
 * @param {string} url - 网页URL
 * @param {Function} action - 自定义操作函数
 * @param {Object} options - 配置选项
 */
export async function customAction(url, action, options = {}) {
  const {
    headless = true,
    waitUntil = 'domcontentloaded',
    timeout = 30000
  } = options;

  const browser = await chromium.launch({ headless });
  const context = await browser.newContext({
    userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36'
  });
  const page = await context.newPage();

  try {
    console.log(`🌐 正在访问: ${url}`);
    await page.goto(url, { waitUntil, timeout });

    // 执行自定义操作
    const result = await action(page);

    return {
      success: true,
      url,
      result
    };

  } catch (error) {
    console.error(`❌ 操作失败: ${error.message}`);
    return {
      success: false,
      url,
      error: error.message
    };
  } finally {
    await browser.close();
  }
}

// 如果直接运行此脚本
if (import.meta.url === `file://${process.argv[1]}`) {
  // 示例：访问一个网页
  const url = process.argv[2] || 'https://www.baidu.com';
  const outputDir = path.join(process.cwd(), 'screenshots');
  
  if (!fs.existsSync(outputDir)) {
    fs.mkdirSync(outputDir, { recursive: true });
  }

  const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
  const screenshotPath = path.join(outputDir, `screenshot-${timestamp}.png`);

  visitPage(url, { screenshotPath })
    .then(result => {
      if (result.success) {
        console.log('\n✅ 访问成功!');
        console.log(`标题: ${result.title}`);
        console.log(`文本长度: ${result.text.length} 字符`);
      } else {
        console.log('\n❌ 访问失败');
        console.log(`错误: ${result.error}`);
      }
      process.exit(result.success ? 0 : 1);
    })
    .catch(error => {
      console.error('Error:', error);
      process.exit(1);
    });
}

export default {
  visitPage,
  screenshot,
  extractText,
  customAction
};