import { pool } from './src/db/migrate';

async function createBrandsTables() {
  console.log('📦 Creating brands tracking tables...\n');

  try {
    // Brands table - stores unique brands across all stores
    await pool.query(`
      CREATE TABLE IF NOT EXISTS brands (
        id SERIAL PRIMARY KEY,
        name VARCHAR(255) UNIQUE NOT NULL,
        logo_url TEXT,
        first_seen_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        last_seen_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
      )
    `);
    console.log('✅ Created brands table');

    // Store-Brand relationship - tracks which brands are at which stores
    await pool.query(`
      CREATE TABLE IF NOT EXISTS store_brands (
        id SERIAL PRIMARY KEY,
        store_id INTEGER REFERENCES stores(id) ON DELETE CASCADE,
        brand_id INTEGER REFERENCES brands(id) ON DELETE CASCADE,
        first_seen_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        last_seen_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        active BOOLEAN DEFAULT true,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        UNIQUE(store_id, brand_id)
      )
    `);
    console.log('✅ Created store_brands table');

    // Add indexes for performance
    await pool.query(`
      CREATE INDEX IF NOT EXISTS idx_store_brands_store_id ON store_brands(store_id);
      CREATE INDEX IF NOT EXISTS idx_store_brands_brand_id ON store_brands(brand_id);
      CREATE INDEX IF NOT EXISTS idx_store_brands_active ON store_brands(active);
      CREATE INDEX IF NOT EXISTS idx_brands_name ON brands(name);
    `);
    console.log('✅ Created indexes');

    console.log('\n✅ Brands tables created successfully!');
    console.log('\nTable structure:');
    console.log('  brands: Stores unique brand names and logos');
    console.log('  store_brands: Tracks which brands are at which stores with timestamps');
    console.log('\nReports you can run:');
    console.log('  - Brand exposure: How many stores carry each brand');
    console.log('  - Brand timeline: When brands were added/removed from stores');
    console.log('  - Store changes: Which brands were added/dropped at a store');
  } catch (error) {
    console.error('❌ Error:', error);
  } finally {
    await pool.end();
  }
}

createBrandsTables();