---
import BaseLayout from './BaseLayout.astro';
import { getCollection } from 'astro:content';
import { fundamentalsOrder, referenceOrder } from '../config/learning-hub';

interface Props {
  title: string;
  description?: string;
  estimatedReadingTime?: string;
  lastUpdated?: string;
  tags?: string[];
}

const { title, description, estimatedReadingTime, lastUpdated, tags } = Astro.props;
const base = import.meta.env.BASE_URL;

const createOrderIndexMap = (order: string[]) => {
  const map = new Map<string, number>();
  for (let i = 0; i < order.length; i += 1) {
    map.set(order[i], i);
  }
  return map;
};

const articles = await getCollection('learning-hub');

const fundamentalsOrderIndex = createOrderIndexMap(fundamentalsOrder);
const referenceOrderIndex = createOrderIndexMap(referenceOrder);

const fundamentals = articles
  .filter((a) => fundamentalsOrderIndex.has(a.id))
  .sort(
    (a, b) =>
      (fundamentalsOrderIndex.get(a.id) ?? 0) - (fundamentalsOrderIndex.get(b.id) ?? 0),
  );

const reference = articles
  .filter((a) => referenceOrderIndex.has(a.id))
  .sort(
    (a, b) =>
      (referenceOrderIndex.get(a.id) ?? 0) - (referenceOrderIndex.get(b.id) ?? 0),
  );

const currentSlug = Astro.url.pathname.replace(/\/$/, '').split('/').pop();
---

<BaseLayout title={title} description={description} activeNav="learning-hub">
  <main id="main-content">
    <div class="page-header">
      <div class="container">
        <nav class="breadcrumb" aria-label="Breadcrumb">
          <a href={`${base}learning-hub/`}>← Learning Hub</a>
        </nav>
        <h1>{title}</h1>
        {description && <p>{description}</p>}
        <div class="article-meta">
          {estimatedReadingTime && (
            <span class="meta-item">
              <span aria-hidden="true">📖</span> {estimatedReadingTime}
            </span>
          )}
          {lastUpdated && <span class="meta-item">Updated: {lastUpdated}</span>}
        </div>
        {tags && tags.length > 0 && (
          <div class="article-tags">
            {tags.map((tag) => (
              <span class="tag">{tag}</span>
            ))}
          </div>
        )}
      </div>
    </div>

    <div class="page-content">
      <div class="container">
        <div class="learning-hub-layout">
          <nav class="learning-hub-sidebar" aria-label="Learning Hub articles">
            <div class="sidebar-section">
              <h3>Fundamentals</h3>
              <ol class="sidebar-nav-list">
                {fundamentals.map((article) => (
                  <li>
                    <a
                      href={`${base}learning-hub/${article.id}/`}
                      class={currentSlug === article.id ? 'active' : ''}
                      aria-current={currentSlug === article.id ? 'page' : undefined}
                    >
                      {article.data.title}
                    </a>
                  </li>
                ))}
              </ol>
            </div>
            <div class="sidebar-section">
              <h3>Reference</h3>
              <ul class="sidebar-nav-list">
                {reference.map((article) => (
                  <li>
                    <a
                      href={`${base}learning-hub/${article.id}/`}
                      class={currentSlug === article.id ? 'active' : ''}
                      aria-current={currentSlug === article.id ? 'page' : undefined}
                    >
                      {article.data.title}
                    </a>
                  </li>
                ))}
              </ul>
            </div>
            <div class="sidebar-section">
              <h3>Hands-on</h3>
              <ul class="sidebar-nav-list">
                <li>
                  <a
                    href={`${base}learning-hub/cookbook/`}
                    class={currentSlug === 'cookbook' ? 'active' : ''}
                    aria-current={currentSlug === 'cookbook' ? 'page' : undefined}
                  >
                    Cookbook
                  </a>
                </li>
              </ul>
            </div>
          </nav>
          <article class="article-content">
            <slot />
          </article>
        </div>
      </div>
    </div>
  </main>
</BaseLayout>