Spotify
× AI.

# The data shows strong correlation between the AI DJ launch and Spotify's
# growth across all three metrics — subscribers, stock, and revenue.
# But correlation is not causation.

# Confounders we couldn't fully isolate:
#   - Broader market recovery 2023→2024 lifted all tech stocks
#   - Spotify's simultaneous cost-cutting (layoffs) contributed to profit flip
#   - Podcast strategy, audiobooks, and price increases all ran in parallel

# What we can say: the trajectory is consistent with the DJ being a meaningful
# retention and conversion driver. The numbers moved in the right direction.
# What we can't say: it was the only cause.

# Future work we'd want: social media sentiment data around the launch,
# A/B test data on DJ users vs non-users (not public), churn rate specifics.

// 1. Ask OpenAI for 10 track recommendations
async function getTracksFromPrompt(prompt, openAIKey) {
  const res = await fetch('https://api.openai.com/v1/chat/completions', {
    method: 'POST',
    headers: { 'Authorization': `Bearer ${openAIKey}`, 'Content-Type': 'application/json' },
    body: JSON.stringify({
      model: 'gpt-4o-mini',
      messages: [
        { role: 'system', content: 'Return ONLY a JSON array of 10 objects with "title" and "artist" keys.' },
        { role: 'user', content: `Recommend 10 songs for: ${prompt}` }
      ]
    })
  });
  const data = await res.json();
  return JSON.parse(data.choices[0].message.content);
}

// 2. Search all 10 on Spotify in parallel
async function resolveTracksOnSpotify(tracks, accessToken) {
  return Promise.all(tracks.map(async t => {
    const q = encodeURIComponent(`track:${t.title} artist:${t.artist}`);
    const res = await fetch(`https://api.spotify.com/v1/search?q=${q}&type=track&limit=1`, {
      headers: { 'Authorization': `Bearer ${accessToken}` }
    });
    const { tracks: { items } } = await res.json();
    return items[0] ?? null;
  }));
}