CREATE TABLE IF NOT EXISTS billing_plans (
  id VARCHAR(32) PRIMARY KEY,
  name VARCHAR(64) NOT NULL,
  price_monthly INTEGER NOT NULL DEFAULT 0,
  price_yearly INTEGER NOT NULL DEFAULT 0,
  currency VARCHAR(3) NOT NULL DEFAULT 'RUB',
  features JSONB DEFAULT '[]'::jsonb,
  limits JSONB DEFAULT '{}'::jsonb
);

CREATE TABLE IF NOT EXISTS billing_subscriptions (
  id TEXT PRIMARY KEY,
  user_id TEXT NOT NULL,
  plan_id VARCHAR(32) NOT NULL,
  status VARCHAR(24) NOT NULL DEFAULT 'active',
  period VARCHAR(8) NOT NULL DEFAULT 'monthly',
  started_at TIMESTAMP DEFAULT NOW() NOT NULL,
  expires_at TIMESTAMP,
  created_at TIMESTAMP DEFAULT NOW() NOT NULL,
  updated_at TIMESTAMP DEFAULT NOW() NOT NULL
);

CREATE TABLE IF NOT EXISTS billing_payments (
  id TEXT PRIMARY KEY,
  user_id TEXT NOT NULL,
  plan_id VARCHAR(32) NOT NULL,
  amount INTEGER NOT NULL,
  currency VARCHAR(3) NOT NULL DEFAULT 'RUB',
  status VARCHAR(24) NOT NULL DEFAULT 'pending',
  yookassa_id TEXT,
  period VARCHAR(8) NOT NULL DEFAULT 'monthly',
  created_at TIMESTAMP DEFAULT NOW() NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_billing_subscriptions_user_id ON billing_subscriptions(user_id);
CREATE INDEX IF NOT EXISTS idx_billing_payments_user_id ON billing_payments(user_id);