/**
 * Episteme Presentation Renderer
 *
 * Reads JSON data and renders Reveal.js slides
 */

(async function () {
  // Load presentation data
  const dataUrl = window.PRESENTATION_DATA_URL || '../generated/agile-agent-team.json';

  let data;
  try {
    const response = await fetch(dataUrl);
    data = await response.json();
  } catch (error) {
    console.error('Failed to load presentation data:', error);
    document.getElementById('slides').innerHTML = `
      <section class="slide-title">
        <h1>Error Loading Presentation</h1>
        <p class="subtitle">Could not load ${dataUrl}</p>
        <p>Run: <code>npx ts-node scripts/generate.ts data/agile-agent-team.yaml</code></p>
      </section>
    `;
    Reveal.initialize();
    return;
  }

  const slidesContainer = document.getElementById('slides');

  // Actor icon mapping (simple initials for now)
  function getActorInitials(actor) {
    return actor.label.split(' ').map(w => w[0]).join('').toUpperCase().slice(0, 2);
  }

  // Format JSON for display
  function formatData(data) {
    if (!data) return '';
    return JSON.stringify(data, null, 2)
      .replace(/"([^"]+)":/g, '<span class="json-key">"$1"</span>:')
      .replace(/: "([^"]+)"/g, ': <span class="json-string">"$1"</span>')
      .replace(/: (\d+\.?\d*)/g, ': <span class="json-number">$1</span>')
      .replace(/: (true|false)/g, ': <span class="json-boolean">$1</span>')
      .replace(/: (null)/g, ': <span class="json-null">$1</span>');
  }

  // Render slides
  function renderSlides(slides) {
    let sectionNumber = 0;

    for (const slide of slides) {
      const section = document.createElement('section');

      switch (slide.type) {
        case 'title':
          section.classList.add('title-slide');
          section.innerHTML = `
            <div class="slide-title">
              <h1 class="brand">stemedb</h1>
            </div>
          `;
          break;

        case 'section-title':
          sectionNumber++;
          section.innerHTML = `
            <div class="slide-section-title">
              <span class="section-number">Section ${sectionNumber}</span>
              <h2>${slide.title}</h2>
              <p class="subtitle">${slide.subtitle}</p>
              <p class="description">${slide.description.trim()}</p>
            </div>
          `;
          break;

        case 'sequence':
          section.setAttribute('data-auto-animate', '');
          section.innerHTML = renderSequenceSlide(slide, data.actors);
          break;
      }

      slidesContainer.appendChild(section);
    }
  }

  // Render sequence slide
  function renderSequenceSlide(slide, allActors) {
    const actors = slide.actors;
    const steps = slide.steps;

    // Actor columns
    const actorHtml = Object.values(actors).map(actor => `
      <div class="actor">
        <div class="actor-icon" style="background-color: ${actor.color}">
          ${getActorInitials(actor)}
        </div>
        <span class="actor-label">${actor.label}</span>
      </div>
    `).join('');

    // Step cards as fragments
    const stepsHtml = steps.map((step, index) => {
      const statusClass = step.danger ? 'danger' : (step.success ? 'success' : (step.warning ? 'warning' : ''));
      const fromActor = step.fromActor || actors[step.from] || { label: step.from };
      const toActor = step.toActor || actors[step.to] || { label: step.to };

      return `
        <div class="step-card ${statusClass} fragment" data-fragment-index="${index}">
          <div class="step-index">${index + 1}</div>
          <div class="step-content">
            <div class="step-header">
              <div class="step-actors">
                <span class="step-from">${fromActor.label}</span>
                <span class="step-arrow">→</span>
                <span class="step-to">${toActor.label}</span>
              </div>
              <span class="step-action">${step.action}</span>
            </div>
            <div class="step-label">${step.label}</div>
            ${step.note ? `<div class="step-note">${step.note}</div>` : ''}
            ${step.data ? `<div class="step-data"><pre>${formatData(step.data)}</pre></div>` : ''}
            ${step.callout ? `<div class="step-callout">${step.callout}</div>` : ''}
          </div>
        </div>
      `;
    }).join('');

    return `
      <div class="slide-sequence">
        <div class="header">
          <h3>${slide.title}</h3>
        </div>
        <div class="actors-row">
          ${actorHtml}
        </div>
        <div class="steps-container">
          ${stepsHtml}
        </div>
      </div>
    `;
  }

  // Render slides
  renderSlides(data.slides);

  // Initialize Reveal.js
  Reveal.initialize({
    hash: true,
    history: true,
    controls: true,
    progress: true,
    center: true,
    transition: 'fade',
    transitionSpeed: 'fast',

    // Keyboard shortcuts
    keyboard: {
      // Arrow keys for fragments within slide
      39: 'next', // right
      37: 'prev', // left
    },
  });

  // Make step cards visible as fragments appear
  Reveal.on('fragmentshown', event => {
    event.fragment.classList.add('visible');
  });

  Reveal.on('fragmenthidden', event => {
    event.fragment.classList.remove('visible');
  });

  // Show all fragments on slide enter if coming from later slide
  Reveal.on('slidechanged', event => {
    const currentSlide = event.currentSlide;
    const fragments = currentSlide.querySelectorAll('.fragment');

    // Reset visibility on slide change
    fragments.forEach(frag => {
      if (frag.classList.contains('visible')) {
        frag.classList.add('visible');
      }
    });
  });
})();