const content = await lettr.ai.generateContent({
  prompt: 'Write a welcome email for a SaaS product',
  tone: 'friendly',
  length: 'medium'
});

console.log(content.subject);  // Generated subject line
console.log(content.html);     // Generated HTML content

const subjects = await lettr.ai.generateSubjects({
  content: 'We are launching a new feature that helps users save time',
  count: 5,
  style: 'engaging'
});

// Returns array of subject lines:
[
  "🚀 Save Hours Every Week with Our New Feature",
  "Your Time-Saving Solution Has Arrived",
  "New Feature Alert: Work Smarter, Not Harder",
  "Introducing the Feature You've Been Waiting For",
  "Ready to Reclaim Your Time?"
]

const improved = await lettr.ai.improve({
  html: existingEmailHtml,
  goals: ['clarity', 'engagement', 'conversion']
});

console.log(improved.html);
console.log(improved.suggestions);

await lettr.emails.send({
  from: 'you@example.com',
  to: ['recipient@example.com'],
  subject: 'Your Personalized Recommendations',
  aiPersonalization: {
    enabled: true,
    context: {
      userInterests: ['technology', 'productivity'],
      purchaseHistory: ['laptop', 'headphones']
    }
  },
  templateId: 'tpl_recommendations'
});

const variants = await lettr.ai.generateVariants({
  baseContent: originalEmail,
  variantCount: 3,
  focus: 'subject_line'
});

// Use variants in A/B test
const campaign = await lettr.campaigns.create({
  variants: variants,
  testSettings: {
    winnerCriteria: 'open_rate'
  }
});

const analysis = await lettr.ai.analyzeSpam({
  html: emailHtml,
  subject: 'Limited Time Offer!'
});

// Returns:
{
  score: 3.2,  // Lower is better
  issues: [
    { type: 'subject', message: 'Contains spam trigger word: "Limited"' },
    { type: 'content', message: 'High image-to-text ratio' }
  ],
  suggestions: [
    'Consider rephrasing the subject line',
    'Add more text content to balance images'
  ]
}