class CreatePromotionCodes < ActiveRecord::Migration[8.0]
  def change
    create_table :promotion_codes do |t|
      t.string :code, null: false
      t.integer :discount_amount_cents, null: false, default: 0
      t.datetime :expires_at
      t.boolean :active, default: true, null: false
      t.integer :usage_limit, default: nil
      t.integer :uses_count, default: 0, null: false

      # Reference user(promoter) who has created the promotion code
      t.references :user, null: false, foreign_key: true
      t.references :event, null: false, foreign_key: true

      t.timestamps
    end

    # Unique index for code
    add_index :promotion_codes, :code, unique: true
  end
end