#!/usr/bin/env node

/**
 * Shopify SEO Bot - SEO 优化工具
 * @version 1.0.0
 * @author 张 sir
 */

/**
 * 分析店铺 SEO
 */
async function analyzeShopify(shopUrl) {
  console.log('🔍 分析 Shopify 店铺 SEO...\n');
  console.log(`店铺：${shopUrl}`);
  console.log('');

  // 模拟分析结果
  const analysis = {
    score: 68,
    issues: [
      { type: 'error', count: 3, items: ['缺少 meta 描述', '图片无 ALT 标签', '重复标题'] },
      { type: 'warning', count: 5, items: ['标题过长', '描述过短', 'URL 含参数', '缺少 H1', '内部链接少'] },
      { type: 'notice', count: 8, items: ['可添加结构化数据', '可优化图片大小', '可添加博客内容'] }
    ],
    recommendations: [
      '为所有产品添加 unique meta 描述',
      '优化产品图片，添加 descriptive ALT 标签',
      '缩短产品标题至 60 字符以内',
      '添加产品相关博客内容',
      '实施结构化数据 (Schema.org)'
    ]
  };

  console.log('SEO 评分报告\n');
  console.log(`综合评分：${analysis.score}/100`);
  
  const grade = analysis.score >= 80 ? 'A' : analysis.score >= 70 ? 'B' : analysis.score >= 60 ? 'C' : 'D';
  console.log(`等级：${grade}`);
  console.log('');

  console.log('问题发现:');
  analysis.issues.forEach(issue => {
    const icon = issue.type === 'error' ? '❌' : issue.type === 'warning' ? '⚠️' : 'ℹ️';
    console.log(`  ${icon} ${issue.type.toUpperCase()}: ${issue.count}个`);
    issue.items.forEach(item => console.log(`     - ${item}`));
  });

  console.log('\n💡 优化建议:');
  analysis.recommendations.forEach((rec, i) => {
    console.log(`  ${i + 1}. ${rec}`);
  });

  return analysis;
}

/**
 * 优化产品
 */
async function optimizeProduct(productId, keywords) {
  console.log('✏️ 优化产品 SEO...\n');
  console.log(`产品 ID: ${productId}`);
  console.log(`关键词：${keywords.join(', ')}`);
  console.log('');

  // 模拟优化结果
  const optimization = {
    original: {
      title: 'Wireless Bluetooth Headphones Premium Quality Sound',
      description: 'Good headphones with nice sound.',
      metaDescription: ''
    },
    optimized: {
      title: 'Wireless Bluetooth Headphones - Premium Sound Quality | Free Shipping',
      description: 'Experience premium sound quality with our wireless Bluetooth headphones. Comfortable fit, long battery life, and crystal-clear audio. Free shipping worldwide.',
      metaDescription: 'Shop wireless Bluetooth headphones with premium sound quality. Comfortable, long battery life, free shipping. Order now!'
    },
    improvements: {
      titleLength: { before: 58, after: 60, status: '✅' },
      descLength: { before: 32, after: 156, status: '✅' },
      keywordsIncluded: { before: 1, after: 5, status: '✅' }
    }
  };

  console.log('优化对比:\n');
  console.log('标题:');
  console.log(`  原：${optimization.original.title}`);
  console.log(`  新：${optimization.optimized.title}`);
  console.log('');

  console.log('描述:');
  console.log(`  原：${optimization.original.description}`);
  console.log(`  新：${optimization.optimized.description}`);
  console.log('');

  console.log('Meta 描述:');
  console.log(`  新：${optimization.optimized.metaDescription}`);
  console.log('');

  console.log('改进分析:');
  Object.entries(optimization.improvements).forEach(([key, value]) => {
    console.log(`  ${key}: ${value.before} → ${value.after} ${value.status}`);
  });

  return optimization;
}

/**
 * 关键词研究
 */
async function keywordResearch(seedKeyword) {
  console.log(`🔍 关键词研究：${seedKeyword}\n`);

  // 模拟关键词数据
  const keywords = [
    { keyword: seedKeyword, volume: 12000, difficulty: 65, cpc: 2.5, intent: 'commercial' },
    { keyword: `best ${seedKeyword}`, volume: 8500, difficulty: 58, cpc: 3.2, intent: 'commercial' },
    { keyword: `${seedKeyword} review`, volume: 6200, difficulty: 45, cpc: 1.8, intent: 'informational' },
    { keyword: `cheap ${seedKeyword}`, volume: 5800, difficulty: 72, cpc: 2.1, intent: 'transactional' },
    { keyword: `${seedKeyword} for beginners`, volume: 3200, difficulty: 35, cpc: 1.5, intent: 'informational' },
    { keyword: `${seedKeyword} buying guide`, volume: 2800, difficulty: 40, cpc: 2.0, intent: 'commercial' }
  ];

  console.log('关键词建议:\n');
  console.log('关键词'.padEnd(30) + '搜索量'.padStart(10) + '难度'.padStart(8) + 'CPC'.padStart(8) + '意图');
  console.log('='.repeat(70));

  keywords.forEach(kw => {
    const diffBar = '█'.repeat(Math.floor(kw.difficulty / 10));
    const intentIcon = kw.intent === 'commercial' ? '💰' : kw.intent === 'transactional' ? '🛒' : '📖';
    console.log(
      kw.keyword.padEnd(30) +
      kw.volume.toString().padStart(10) +
      diffBar.padStart(8) +
      `$${kw.cpc}`.padStart(8) +
      ` ${intentIcon}`
    );
  });

  console.log('\n💡 建议:');
  console.log('  • 优先选择难度<50 的长尾词');
  console.log('  • 商业意图关键词转化率高');
  console.log('  • 结合多个关键词创建内容');

  return keywords;
}

/**
 * 批量优化
 */
async function bulkOptimize(collectionId) {
  console.log('📦 批量优化产品...\n');
  console.log(`产品系列：${collectionId}`);
  console.log('');

  const mockResults = {
    total: 25,
    optimized: 25,
    errors: 0,
    avgScoreImprovement: 23
  };

  console.log('处理进度:');
  for (let i = 1; i <= 5; i++) {
    console.log(`  ${'█'.repeat(i * 4)} ${i * 20}%`);
    await new Promise(r => setTimeout(r, 200));
  }

  console.log('\n✅ 批量优化完成!');
  console.log(`   总产品数：${mockResults.total}`);
  console.log(`   成功优化：${mockResults.optimized}`);
  console.log(`   错误：${mockResults.errors}`);
  console.log(`   平均分数提升：+${mockResults.avgScoreImprovement}`);

  return mockResults;
}

/**
 * 主函数
 */
async function main() {
  const args = process.argv.slice(2);

  if (args.includes('--help') || args.includes('-h')) {
    console.log(`
Shopify SEO Bot - SEO 优化工具

用法:
  node index.js [命令] [选项]

命令:
  --analyze <url>    分析店铺 SEO
  --optimize         优化产品
  --bulk             批量优化
  --keywords <kw>    关键词研究

选项:
  --product <id>     产品 ID
  --collection <id>  产品系列 ID
  --keywords <list>  关键词 (逗号分隔)
    `.trim());
    return;
  }

  // 分析店铺
  if (args.includes('--analyze')) {
    const url = args.find(a => !a.startsWith('--')) || 'mystore.myshopify.com';
    await analyzeShopify(url);
    return;
  }

  // 优化产品
  if (args.includes('--optimize')) {
    const productId = args.find(a => a.startsWith('--product='))?.split('=')[1] || '123456';
    const kw = args.find(a => a.startsWith('--keywords='))?.split('=')[1] || 'product';
    await optimizeProduct(productId, kw.split(','));
    return;
  }

  // 批量优化
  if (args.includes('--bulk')) {
    const collectionId = args.find(a => a.startsWith('--collection='))?.split('=')[1] || 'all';
    await bulkOptimize(collectionId);
    return;
  }

  // 关键词研究
  if (args.includes('--keywords')) {
    const seed = args.find(a => a.startsWith('--keywords='))?.split('=')[1] || 'product';
    await keywordResearch(seed);
    return;
  }

  // 默认显示帮助
  console.log('使用 --help 查看用法');
}

main().catch(console.error);
