---
import { getCollection } from 'astro:content';
import Layout from '../layouts/Layout.astro';
import CustomNav from '../components/CustomNav.astro';

// Get all blog entries and sort by date (newest first)
const blogEntries = await getCollection('blog');
const sortedEntries = blogEntries.sort((a, b) =>
  new Date(b.data.date).getTime() - new Date(a.data.date).getTime()
);

// Extract unique categories
const allCategories = [...new Set(sortedEntries.flatMap(entry =>
  entry.data.categories ? entry.data.categories.split(',').map(cat => cat.trim()) : []
))];

const title = 'Blog';
const description = 'The latest updates from Jan. See Changelog for more product updates.';

// Define gradient colors for cards
const gradients = [
  'from-purple-500 to-pink-500',
  'from-blue-500 to-cyan-400',
  'from-purple-600 to-blue-500',
  'from-cyan-400 to-blue-500',
  'from-pink-500 to-purple-600',
  'from-blue-600 to-purple-600'
];
---

<Layout title={title} description={description}>
  <CustomNav />
  <main class="blog-page">
    <div class="blog-container">
      <!-- Header -->
      <header class="blog-header">
        <h1>Blog</h1>
        <p>The latest updates from Jan. See <a href="/changelog" class="changelog-link">Changelog</a> for more product updates.</p>
      </header>

      <!-- Category Filter -->
      <div class="category-filter">
        <button class="category-btn active" data-category="all">All Categories</button>
        <button class="category-btn" data-category="guides">Guides</button>
        <button class="category-btn" data-category="research">Research</button>
        <button class="category-btn" data-category="building jan">Building Jan</button>
      </div>

      <!-- Blog Grid -->
      <div class="blog-grid">
        {sortedEntries.map((entry, index) => {
          const date = new Date(entry.data.date);
          const formattedDate = date.toLocaleDateString('en-US', {
            year: 'numeric',
            month: 'long',
            day: 'numeric'
          });
          const gradientClass = gradients[index % gradients.length];
          const category = entry.data.categories || 'guides';

          return (
            <article class={`blog-card ${gradientClass}`} data-category={category.toLowerCase()}>
              <div class="card-header">
                <div class="card-gradient bg-gradient-to-br {gradientClass}">
                  <div class="category-badge">{category}</div>
                  <div class="card-date">{formattedDate}</div>
                </div>
              </div>

              <div class="card-content">
                <h2 class="card-title">
                  <a href={`/blog/${entry.slug}`}>{entry.data.title}</a>
                </h2>

                <p class="card-description">{entry.data.description}</p>

                <a href={`/blog/${entry.slug}`} class="read-more">
                  Read more...
                </a>
              </div>
            </article>
          );
        })}
      </div>
    </div>
  </main>
</Layout>

<style>
  /* Blog Page Styles */
  .blog-page {
    min-height: 100vh;
    background: var(--sl-color-bg);
    color: var(--sl-color-text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    overflow-x: hidden;
    width: 100%;
  }

  .blog-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 2rem 1rem;
    overflow-x: hidden;
  }

  .blog-header {
    text-align: center;
    margin-bottom: 3rem;
  }

  .blog-header h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff 0%, #888888 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .blog-header p {
    font-size: 1.1rem;
    color: var(--sl-color-text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
  }

  .changelog-link {
    color: var(--sl-color-accent);
    text-decoration: none;
    font-weight: 500;
  }

  .changelog-link:hover {
    text-decoration: underline;
  }

  .category-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
  }

  .category-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 2rem;
    background: var(--sl-color-bg-sidebar);
    color: var(--sl-color-text);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid var(--sl-color-gray-5);
  }

  .category-btn:hover {
    background: var(--sl-color-bg-accent);
    border-color: var(--sl-color-accent);
    transform: translateY(-1px);
  }

  .category-btn.active {
    background: var(--sl-color-accent);
    color: white;
    border-color: var(--sl-color-accent);
  }

  .blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
  }

  .blog-card {
    background: var(--sl-color-bg-sidebar);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--sl-color-gray-5);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    height: fit-content;
  }

  .blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
  }

  .card-header {
    position: relative;
  }

  .card-gradient {
    height: 120px;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1rem;
  }

  /* Individual gradient backgrounds */
  .blog-card.from-purple-500.to-pink-500 .card-gradient {
    background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  }

  .blog-card.from-blue-500.to-cyan-400 .card-gradient {
    background: linear-gradient(135deg, #3b82f6 0%, #22d3ee 100%);
  }

  .blog-card.from-purple-600.to-blue-500 .card-gradient {
    background: linear-gradient(135deg, #9333ea 0%, #3b82f6 100%);
  }

  .blog-card.from-cyan-400.to-blue-500 .card-gradient {
    background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
  }

  .blog-card.from-pink-500.to-purple-600 .card-gradient {
    background: linear-gradient(135deg, #ec4899 0%, #9333ea 100%);
  }

  .blog-card.from-blue-600.to-purple-600 .card-gradient {
    background: linear-gradient(135deg, #2563eb 0%, #9333ea 100%);
  }

  .category-badge {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: capitalize;
    backdrop-filter: blur(10px);
  }

  .card-date {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.85rem;
    font-weight: 500;
    text-align: right;
  }

  .card-content {
    padding: 1.5rem;
  }

  .card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--sl-color-text);
    line-height: 1.3;
    overflow-wrap: break-word;
    word-wrap: break-word;
    hyphens: auto;
  }

  .card-title a {
    color: var(--sl-color-text);
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .card-title a:hover {
    color: var(--sl-color-accent);
  }

  .card-description {
    color: var(--sl-color-text-muted);
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .read-more {
    color: var(--sl-color-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s ease;
  }

  .read-more:hover {
    color: var(--sl-color-text);
  }

  /* Responsive design */
  @media (max-width: 768px) {
    .blog-header h1 {
      font-size: 2.5rem;
    }

    .blog-grid {
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }

    .category-filter {
      gap: 0.5rem;
      margin-bottom: 2rem;
    }

    .category-btn {
      padding: 0.5rem 1rem;
      font-size: 0.85rem;
    }
  }

  @media (max-width: 480px) {
    .blog-container {
      padding: 1.5rem 0.75rem;
    }

    .blog-header h1 {
      font-size: 2rem;
    }

    .card-gradient {
      height: 100px;
    }

    .card-content {
      padding: 1rem;
    }
  }
</style>

<script>
  // Category filtering functionality
  const categoryButtons = document.querySelectorAll('.category-btn');
  const blogCards = document.querySelectorAll('.blog-card');

  categoryButtons.forEach(button => {
    button.addEventListener('click', () => {
      // Remove active class from all buttons
      categoryButtons.forEach(btn => btn.classList.remove('active'));

      // Add active class to clicked button
      button.classList.add('active');

      const selectedCategory = button.dataset.category;

      // Show/hide cards based on category
      blogCards.forEach(card => {
        if (selectedCategory === 'all' || card.dataset.category === selectedCategory) {
          card.style.display = 'block';
        } else {
          card.style.display = 'none';
        }
      });
    });
  });
</script>
</Layout>