import { chromium } from '@playwright/test';
import fs from 'fs';
import path from 'path';

const screenshotsDir = '/tmp/screenshots/full-visual-test';
fs.mkdirSync(screenshotsDir, { recursive: true });

const pages = [
  { name: 'home', url: 'http://localhost:3000', sections: ['hero', 'stats', 'services', 'industries', 'cases', 'approach', 'insights', 'cta'] },
  { name: 'products', url: 'http://localhost:3000/products', sections: ['hero', 'product-grid'] },
  { name: 'solutions', url: 'http://localhost:3000/solutions', sections: ['hero', 'solutions-grid'] },
  { name: 'services', url: 'http://localhost:3000/services', sections: ['hero', 'services-grid'] },
  { name: 'about', url: 'http://localhost:3000/about', sections: ['hero', 'about-content'] },
];

async function capturePage(page, pageInfo) {
  console.log(`\n=== Testing ${pageInfo.name} page ===`);
  
  await page.goto(pageInfo.url, { waitUntil: 'networkidle' });
  await page.waitForTimeout(1500);
  
  await page.screenshot({
    path: path.join(screenshotsDir, `${pageInfo.name}-full.png`),
    fullPage: true,
  });
  console.log(`  ✓ Full page screenshot captured`);
  
  const viewportHeight = 1080;
  let currentScroll = 0;
  let sectionIndex = 0;
  
  while (sectionIndex < 5) {
    await page.evaluate((scroll) => {
      window.scrollTo(0, scroll);
    }, currentScroll);
    
    await page.waitForTimeout(800);
    
    await page.screenshot({
      path: path.join(screenshotsDir, `${pageInfo.name}-section-${sectionIndex + 1}.png`),
    });
    
    currentScroll += viewportHeight * 0.8;
    sectionIndex++;
  }
  
  console.log(`  ✓ Section screenshots captured`);
  
  const cards = await page.$$('a[href], .card, [class*="group"]');
  if (cards.length > 0) {
    const firstCard = cards[0];
    
    await firstCard.scrollIntoViewIfNeeded();
    await page.waitForTimeout(500);
    
    const box = await firstCard.boundingBox();
    if (box) {
      await page.screenshot({
        path: path.join(screenshotsDir, `${pageInfo.name}-card-before.png`),
        clip: {
          x: Math.max(0, box.x - 20),
          y: Math.max(0, box.y - 20),
          width: Math.min(box.width + 40, 800),
          height: Math.min(box.height + 40, 600),
        },
      });
      
      await firstCard.hover();
      await page.waitForTimeout(600);
      
      await page.screenshot({
        path: path.join(screenshotsDir, `${pageInfo.name}-card-hover.png`),
        clip: {
          x: Math.max(0, box.x - 20),
          y: Math.max(0, box.y - 20),
          width: Math.min(box.width + 40, 800),
          height: Math.min(box.height + 40, 600),
        },
      });
      
      console.log(`  ✓ Card hover states captured`);
    }
  }
  
  await page.evaluate(() => {
    window.scrollTo(0, 0);
  });
  await page.waitForTimeout(500);
}

async function checkTextReadability(page, pageName) {
  console.log(`\n  Checking text readability...`);
  
  const issues = await page.evaluate(() => {
    const problems = [];
    const textElements = document.querySelectorAll('h1, h2, h3, h4, p, span, a');
    
    textElements.forEach((el, index) => {
      const style = window.getComputedStyle(el);
      const opacity = parseFloat(style.opacity);
      const color = style.color;
      const bgColor = style.backgroundColor;
      const fontSize = parseFloat(style.fontSize);
      const zIndex = parseInt(style.zIndex) || 0;
      
      const rect = el.getBoundingClientRect();
      if (rect.width === 0 || rect.height === 0) return;
      
      if (opacity < 0.4 && opacity > 0 && el.textContent.trim().length > 5) {
        problems.push({
          type: 'low-opacity',
          text: el.textContent.trim().substring(0, 50),
          opacity: opacity.toFixed(2),
          tag: el.tagName,
        });
      }
      
      if (style.mixBlendMode && style.mixBlendMode !== 'normal') {
        problems.push({
          type: 'mix-blend-mode',
          text: el.textContent.trim().substring(0, 50),
          blendMode: style.mixBlendMode,
          tag: el.tagName,
        });
      }
    });
    
    return problems.slice(0, 10);
  });
  
  if (issues.length > 0) {
    console.log(`  ⚠ Found ${issues.length} potential readability issues:`);
    issues.forEach((issue, i) => {
      console.log(`    ${i + 1}. [${issue.type}] ${issue.tag}: "${issue.text}"`);
    });
  } else {
    console.log(`  ✓ No major readability issues found`);
  }
  
  return issues;
}

async function checkGlowElements(page, pageName) {
  console.log(`\n  Checking glow/blur elements...`);
  
  const glowInfo = await page.evaluate(() => {
    const allElements = document.querySelectorAll('*');
    const glowElements = [];
    
    allElements.forEach((el) => {
      const style = window.getComputedStyle(el);
      const hasBlur = style.filter.includes('blur');
      const hasRadialGradient = style.backgroundImage.includes('radial-gradient');
      const opacity = parseFloat(style.opacity);
      
      if ((hasBlur || hasRadialGradient) && opacity > 0.05) {
        const rect = el.getBoundingClientRect();
        if (rect.width > 100 && rect.height > 100) {
          glowElements.push({
            tag: el.tagName,
            className: el.className.substring(0, 100),
            opacity: opacity.toFixed(3),
            hasBlur,
            hasRadialGradient,
            width: rect.width,
            height: rect.height,
            zIndex: style.zIndex || 'auto',
            position: style.position,
          });
        }
      }
    });
    
    return glowElements.slice(0, 15);
  });
  
  console.log(`  Found ${glowInfo.length} glow/blur elements (>100px, opacity>0.05)`);
  glowInfo.forEach((el, i) => {
    console.log(`    ${i + 1}. ${el.tag} (${Math.round(el.width)}x${Math.round(el.height)}, opacity: ${el.opacity})`);
    console.log(`       position: ${el.position}, zIndex: ${el.zIndex}`);
  });
  
  return glowInfo;
}

async function runTests() {
  console.log('========================================');
  console.log('  Novalon Website Visual Test Suite');
  console.log('========================================');
  
  const browser = await chromium.launch({ headless: true });
  const context = await browser.newContext({
    viewport: { width: 1440, height: 1080 },
  });
  const page = await context.newPage();
  
  let totalIssues = 0;
  
  for (const pageInfo of pages.slice(0, 3)) {
    try {
      await capturePage(page, pageInfo);
      const readabilityIssues = await checkTextReadability(page, pageInfo.name);
      const glowElements = await checkGlowElements(page, pageInfo.name);
      totalIssues += readabilityIssues.length;
    } catch (e) {
      console.log(`  ✗ Error testing ${pageInfo.name}: ${e.message}`);
    }
  }
  
  await browser.close();
  
  console.log('\n========================================');
  console.log('  Test Summary');
  console.log('========================================');
  console.log(`  Screenshots saved to: ${screenshotsDir}`);
  console.log(`  Total readability issues found: ${totalIssues}`);
  console.log('\n  Check the screenshots for visual verification.');
  console.log('========================================');
}

runTests().catch(console.error);