const steps = [
  {
    title: 'User Instruction',
    type: 'user',
    content: 'User: "Use MongoDB on port 27017 for this project"',
    code: null,
    description: 'User provides explicit instruction about database port'
  },
  {
    title: 'AI Acknowledges',
    type: 'ai',
    content: 'AI: "Understood. I\'ll ensure all database connections use port 27017."',
    code: null,
    description: 'AI confirms understanding of the instruction'
  },
  {
    title: '30 Minutes Later...',
    type: 'info',
    content: 'Context: 85,000 tokens into 200,000 token session. Attention degrading.',
    code: null,
    description: 'Time passes, context window fills up, attention decays'
  },
  {
    title: 'AI Generates Code',
    type: 'ai',
    content: 'AI: "Here\'s the database configuration..."',
    code: `// config/database.js
const MONGODB_PORT = 27027; // ← WRONG!
const MONGODB_URI = \`mongodb://localhost:\${MONGODB_PORT}/family_history\`;

module.exports = {
  uri: MONGODB_URI,
  port: MONGODB_PORT
};`,
    description: 'AI generates code with WRONG port number (27027 instead of 27017)'
  },
  {
    title: 'Application Failure',
    type: 'error',
    content: '❌ Error: Failed to connect to MongoDB',
    code: `MongoServerError: connect ECONNREFUSED 127.0.0.1:27027
    at Connection.handleError
    at Connection.onError

MongoDB is running on port 27017, but app is trying port 27027!`,
    description: 'Application crashes because it cannot connect to database'
  },
  {
    title: 'Debugging Begins',
    type: 'info',
    content: 'Developer spends 2+ hours debugging why database won\'t connect...',
    code: null,
    description: 'Time wasted tracking down the port mismatch'
  },
  {
    title: 'Root Cause Found',
    type: 'info',
    content: 'Developer discovers AI used wrong port despite explicit instruction 30 minutes earlier.',
    code: null,
    description: 'The contradiction is finally discovered'
  },
  {
    title: 'How Tractatus Prevents This',
    type: 'success',
    content: 'CrossReferenceValidator would have caught this BEFORE execution:',
    code: `// 1. InstructionPersistenceClassifier stores instruction
{
  text: "Use MongoDB on port 27017",
  quadrant: "SYSTEM",
  persistence: "HIGH",
  parameters: { port: "27017" }
}

// 2. CrossReferenceValidator checks before code generation
❌ VALIDATION FAILED
Proposed port: 27027
Instruction: Use port 27017
Status: REJECTED - Parameter conflict

AI cannot proceed. Human notified.
`,
    description: 'Tractatus framework prevents the error before it happens'
  }
];

let currentStep = -1;
let isPlaying = false;

function initTimeline() {
  const timeline = document.getElementById('timeline');
  timeline.innerHTML = steps.map((step, index) => `
    <div id="step-${index}" class="border-2 border-gray-300 bg-white rounded-lg p-6 transition-all duration-300">
      <div class="flex items-start">
        <div class="flex-shrink-0 mr-4">
          <div class="w-10 h-10 rounded-full ${getStepColor(step.type)} flex items-center justify-center text-white font-bold">
            ${index + 1}
          </div>
        </div>
        <div class="flex-1">
          <h3 class="text-lg font-semibold text-gray-900 mb-2">${step.title}</h3>
          <p class="text-gray-700 mb-3">${step.content}</p>
          ${step.code ? `<pre class="code-block">${escapeHtml(step.code)}</pre>` : ''}
          <p class="text-sm text-gray-500 mt-2 hidden step-description">${step.description}</p>
        </div>
      </div>
    </div>
  `).join('');
}

function getStepColor(type) {
  const colors = {
    user: 'bg-blue-500',
    ai: 'bg-purple-500',
    info: 'bg-gray-500',
    error: 'bg-red-500',
    success: 'bg-green-500'
  };
  return colors[type] || 'bg-gray-500';
}

function escapeHtml(text) {
  const div = document.createElement('div');
  div.textContent = text;
  return div.innerHTML;
}

async function playScenario() {
  if (isPlaying) return;
  isPlaying = true;

  document.getElementById('start-btn').disabled = true;
  document.getElementById('progress-info').classList.remove('hidden');

  for (let i = 0; i <= steps.length - 1; i++) {
    await showStep(i);
    await delay(2000); // 2 second delay between steps
  }

  isPlaying = false;
  document.getElementById('start-btn').disabled = false;
  document.getElementById('start-btn').innerHTML = '▶ Replay';
}

async function showStep(index) {
  currentStep = index;

  // Mark previous steps as complete
  for (let i = 0; i < index; i++) {
    const stepEl = document.getElementById(`step-${i}`);
    stepEl.classList.remove('step-active');
    stepEl.classList.add('step-complete', 'border-green-500', 'bg-green-50');
  }

  // Mark current step as active
  const currentStepEl = document.getElementById(`step-${index}`);
  currentStepEl.classList.add('step-active', 'border-blue-500', 'bg-blue-50', 'fade-in');
  currentStepEl.scrollIntoView({ behavior: 'smooth', block: 'center' });

  // Show description
  currentStepEl.querySelector('.step-description').classList.remove('hidden');

  // Handle error step
  if (steps[index].type === 'error') {
    currentStepEl.classList.remove('step-active', 'border-blue-500', 'bg-blue-50');
    currentStepEl.classList.add('step-error', 'border-red-500', 'bg-red-50');
  }

  // Update progress
  const progress = ((index + 1) / steps.length) * 100;
  document.getElementById('progress-bar').style.width = `${progress}%`;
  document.getElementById('progress-text').textContent = `${index + 1} / ${steps.length}`;
  document.getElementById('current-step-desc').textContent = steps[index].description;
}

function resetScenario() {
  currentStep = -1;
  isPlaying = false;

  // Reset all steps
  steps.forEach((_, index) => {
    const stepEl = document.getElementById(`step-${index}`);
    stepEl.className = 'border-2 border-gray-300 bg-white rounded-lg p-6 transition-all duration-300';
    stepEl.querySelector('.step-description').classList.add('hidden');
  });

  document.getElementById('progress-bar').style.width = '0%';
  document.getElementById('progress-text').textContent = '0 / 8';
  document.getElementById('current-step-desc').textContent = '';
  document.getElementById('progress-info').classList.add('hidden');
  document.getElementById('start-btn').innerHTML = '▶ Start Scenario';
  document.getElementById('start-btn').disabled = false;
}

function delay(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

// Event listeners
document.getElementById('start-btn').addEventListener('click', playScenario);
document.getElementById('reset-btn').addEventListener('click', resetScenario);

// Initialize
initTimeline();