import { LicensePlan } from '../../src/modules/licensing/domain/value-objects/LicensePlan';
import {
  FeatureEntitlement,
  FREE_FEATURES,
  PRO_FEATURES,
  ENTERPRISE_FEATURES,
} from '../../src/modules/licensing/domain/value-objects/FeatureEntitlement';
import { License } from '../../src/modules/licensing/domain/entities/License';
import { LicenseService } from '../../src/modules/licensing/application/LicenseService';
import { ILicenseValidator } from '../../src/modules/licensing/domain/ports/ILicenseValidator';
import { Result, Ok, Err } from '../../src/shared/domain/Result';
import { UniqueId } from '../../src/shared/domain/UniqueId';

// ─── LicensePlan ─────────────────────────────────────────────────────────────

describe('LicensePlan', () => {
  it('creates free plan', () => {
    const plan = LicensePlan.free();
    expect(plan.isFree).toBe(true);
    expect(plan.isPro).toBe(false);
    expect(plan.isEnterprise).toBe(false);
    expect(plan.toString()).toBe('free');
  });

  it('creates pro plan', () => {
    const plan = LicensePlan.pro();
    expect(plan.isPro).toBe(true);
    expect(plan.isFree).toBe(false);
  });

  it('creates enterprise plan', () => {
    const plan = LicensePlan.enterprise();
    expect(plan.isEnterprise).toBe(true);
  });

  it('parses from string', () => {
    expect(LicensePlan.fromString('pro').isPro).toBe(true);
    expect(LicensePlan.fromString('enterprise').isEnterprise).toBe(true);
  });

  it('throws on invalid plan string', () => {
    expect(() => LicensePlan.fromString('invalid')).toThrow();
  });

  it('equals comparison works', () => {
    expect(LicensePlan.free().equals(LicensePlan.free())).toBe(true);
    expect(LicensePlan.free().equals(LicensePlan.pro())).toBe(false);
  });
});

// ─── FeatureEntitlement ───────────────────────────────────────────────────────

describe('FeatureEntitlement', () => {
  it('free features do not include pro features', () => {
    const free = FeatureEntitlement.forFeatures(FREE_FEATURES);
    expect(free.has('exploration:basic')).toBe(true);
    expect(free.has('reports:pdf')).toBe(false);
    expect(free.has('integrations:slack')).toBe(false);
    expect(free.has('auth:sso')).toBe(false);
  });

  it('pro features include free features', () => {
    const pro = FeatureEntitlement.forFeatures(PRO_FEATURES);
    expect(pro.has('exploration:basic')).toBe(true);
    expect(pro.has('reports:pdf')).toBe(true);
    expect(pro.has('integrations:slack')).toBe(true);
    expect(pro.has('auth:sso')).toBe(false);
  });

  it('enterprise features include all features', () => {
    const ent = FeatureEntitlement.forFeatures(ENTERPRISE_FEATURES);
    expect(ent.has('auth:sso')).toBe(true);
    expect(ent.has('auth:ldap')).toBe(true);
    expect(ent.has('branding:whitelabel')).toBe(true);
  });
});

// ─── License entity ──────────────────────────────────────────────────────────

describe('License entity', () => {
  it('createFree returns a free plan license', () => {
    const license = License.createFree();
    expect(license.plan.isFree).toBe(true);
    expect(license.isExpired).toBe(false);
    expect(license.isValid).toBe(true);
  });

  it('free license has only free features', () => {
    const license = License.createFree();
    expect(license.hasFeature('exploration:basic')).toBe(true);
    expect(license.hasFeature('reports:pdf')).toBe(false);
  });

  it('expired license falls back to free features', () => {
    const license = License.reconstitute(
      {
        plan: LicensePlan.pro(),
        organizationName: 'Test',
        email: 'test@test.com',
        expiresAt: new Date('2020-01-01'),
        issuedAt: new Date('2019-01-01'),
        signature: 'sig',
        rawKey: 'key',
      },
      UniqueId.create()
    );
    expect(license.isExpired).toBe(true);
    expect(license.isValid).toBe(false);
    expect(license.hasFeature('reports:pdf')).toBe(false);
  });

  it('pro license has pro features', () => {
    const license = License.reconstitute(
      {
        plan: LicensePlan.pro(),
        organizationName: 'Acme',
        email: 'admin@acme.com',
        expiresAt: null,
        issuedAt: new Date(),
        signature: 'sig',
        rawKey: 'key',
      },
      UniqueId.create()
    );
    expect(license.isValid).toBe(true);
    expect(license.hasFeature('reports:pdf')).toBe(true);
    expect(license.hasFeature('integrations:slack')).toBe(true);
    expect(license.hasFeature('auth:sso')).toBe(false);
  });
});

// ─── LicenseService ───────────────────────────────────────────────────────────

describe('LicenseService', () => {
  function makeProLicense(): License {
    return License.reconstitute(
      {
        plan: LicensePlan.pro(),
        organizationName: 'Acme',
        email: 'admin@acme.com',
        expiresAt: null,
        issuedAt: new Date(),
        signature: 'sig',
        rawKey: 'key',
      },
      UniqueId.create()
    );
  }

  it('starts with free license', () => {
    const validator: ILicenseValidator = {
      validate: async () => Err('should not be called'),
    };
    const service = new LicenseService(validator);
    const status = service.getStatus();
    expect(status.plan).toBe('free');
    expect(status.isValid).toBe(true);
  });

  it('activate with valid key updates current license', async () => {
    const proLicense = makeProLicense();
    const validator: ILicenseValidator = {
      validate: async () => Ok(proLicense),
    };
    const service = new LicenseService(validator);

    const result = await service.activate('valid-key');
    expect(result.ok).toBe(true);
    expect(service.getStatus().plan).toBe('pro');
    expect(service.hasFeature('reports:pdf')).toBe(true);
  });

  it('activate with invalid key returns error and keeps free license', async () => {
    const validator: ILicenseValidator = {
      validate: async () => Err('Invalid license key: signature verification failed'),
    };
    const service = new LicenseService(validator);

    const result = await service.activate('invalid-key');
    expect(result.ok).toBe(false);
    if (!result.ok) {
      expect(result.error).toContain('signature verification failed');
    }
    expect(service.getStatus().plan).toBe('free');
  });

  it('hasFeature checks current license entitlements', () => {
    const validator: ILicenseValidator = {
      validate: async () => Err('unused'),
    };
    const service = new LicenseService(validator);
    expect(service.hasFeature('exploration:basic')).toBe(true);
    expect(service.hasFeature('auth:sso')).toBe(false);
  });
});