import { readFile } from 'node:fs/promises';
import { join } from 'node:path';

describe('subscription foundation migration', () => {
  let migrationSql: string;

  beforeAll(async () => {
    migrationSql = await readFile(
      join(
        process.cwd(),
        'prisma/migrations/20260628160000_milestone121_subscription_foundation/migration.sql',
      ),
      'utf8',
    );
  });

  it('creates subscription and entitlement tables', () => {
    expect(migrationSql).toContain(`CREATE TABLE "user_subscriptions"`);
    expect(migrationSql).toContain(`CREATE TABLE "user_entitlements"`);
  });

  it('creates the subscription status, plan, and billing provider enums', () => {
    expect(migrationSql).toContain(
      `CREATE TYPE "SubscriptionStatus" AS ENUM ('TRIAL', 'ACTIVE', 'PAST_DUE', 'CANCELLED', 'EXPIRED')`,
    );
    expect(migrationSql).toContain(
      `CREATE TYPE "SubscriptionPlan" AS ENUM ('FREE', 'PRO')`,
    );
    expect(migrationSql).toContain(
      `CREATE TYPE "BillingProvider" AS ENUM ('PADDLE')`,
    );
  });

  it('enforces one subscription per user and unique provider subscription identifiers', () => {
    expect(migrationSql).toContain(
      `CREATE UNIQUE INDEX "user_subscriptions_user_id_key"`,
    );
    expect(migrationSql).toContain(
      `CREATE UNIQUE INDEX "user_subscriptions_provider_subscription_id_key"`,
    );
  });

  it('keeps the provider subscription identifier nullable', () => {
    expect(migrationSql).toContain(`"provider_subscription_id" TEXT,`);
    expect(migrationSql).not.toContain(
      `"provider_subscription_id" TEXT NOT NULL`,
    );
  });

  it('enforces entitlement uniqueness per user and key', () => {
    expect(migrationSql).toContain(
      `CREATE UNIQUE INDEX "user_entitlements_user_id_entitlement_key_key"`,
    );
    expect(migrationSql).toContain(
      `ON "user_entitlements"("user_id", "entitlement_key")`,
    );
  });

  it('relates subscriptions and entitlements to users with cascading deletes', () => {
    expect(migrationSql).toContain(
      `ADD CONSTRAINT "user_subscriptions_user_id_fkey"`,
    );
    expect(migrationSql).toContain(
      `ADD CONSTRAINT "user_entitlements_user_id_fkey"`,
    );
    expect(migrationSql.match(/REFERENCES "users"\("id"\)/g)).toHaveLength(2);
    expect(migrationSql.match(/ON DELETE CASCADE/g)).toHaveLength(2);
  });
});