import assert from 'node:assert/strict';
import { HttpError } from '../apps/api/src/core/errors.ts';
import { normalizeTenantHost, selectTenantLocator } from '../apps/api/src/features/tenant/locator.ts';
import { resolveTenantRoute } from '../apps/api/src/features/tenant/routes.ts';

const TENANT_ID = '00000000-0000-4000-8000-000000000001';

function tenantRow(overrides = {}) {
  return {
    id: TENANT_ID,
    slug: 'campus-a',
    name: 'Campus A',
    status: 'active',
    mode: 'saas',
    host: 'campus-a.example.com',
    brand_name: 'Campus A',
    short_name: 'Campus A',
    slogan: null,
    logo_url: null,
    favicon_url: null,
    service_wechat: null,
    service_account_name: null,
    theme: {},
    public_assets: {},
    feature_flags: {},
    admin_feature_flags: {},
    public_config: {},
    ...overrides,
  };
}

function requestContext(url, headers = {}) {
  return {
    url: new URL(url),
    req: { headers },
    res: {},
  };
}

async function expectHttpError(run, statusCode, code) {
  await assert.rejects(run, error => {
    assert.ok(error instanceof HttpError);
    assert.equal(error.statusCode, statusCode);
    assert.equal(error.code, code);
    return true;
  });
}

assert.equal(normalizeTenantHost('Example.COM.:443'), 'example.com');
assert.equal(normalizeTenantHost('[::1]:8787'), '::1');
assert.equal(normalizeTenantHost('::1'), '::1');
assert.equal(normalizeTenantHost('bad,forwarded.example.com'), '');

assert.deepEqual(selectTenantLocator({
  origin: 'https://Campus-A.Example.com:443',
  requestedHost: 'campus-a.example.com.',
  requestHost: 'api.example.com',
  isProduction: true,
}), {
  ok: true,
  locator: {
    kind: 'host',
    host: 'campus-a.example.com',
    expectedTenantCode: null,
    source: 'browser',
  },
});

assert.deepEqual(selectTenantLocator({
  origin: 'null',
  referer: 'https://campus-a.example.com/pages/student/home',
  requestHost: 'api.example.com',
  isProduction: true,
}), {
  ok: true,
  locator: {
    kind: 'host',
    host: 'campus-a.example.com',
    expectedTenantCode: null,
    source: 'browser',
  },
});

assert.equal(selectTenantLocator({
  origin: 'https://campus-a.example.com',
  requestedHost: 'campus-b.example.com',
  isProduction: true,
}).code, 'TENANT_HOST_CONFLICT');

assert.deepEqual(selectTenantLocator({
  origin: 'http://localhost:5173',
  requestedHost: 'localhost:5173',
  tenantCode: 'campus-a',
  requestHost: 'localhost:8787',
  isProduction: false,
}), {
  ok: true,
  locator: { kind: 'tenantCode', tenantCode: 'campus-a', source: 'local-development' },
});

assert.deepEqual(selectTenantLocator({
  tenantCode: 'campus-a',
  requestHost: 'api.example.com',
  isProduction: true,
}), {
  ok: true,
  locator: { kind: 'tenantCode', tenantCode: 'campus-a', source: 'headless-client' },
});

assert.equal(selectTenantLocator({
  requestedHost: 'campus-a.example.com',
  requestHost: 'api.example.com',
  isProduction: true,
}).code, 'TENANT_HOST_UNTRUSTED');

{
  const calls = [];
  const result = await resolveTenantRoute(
    requestContext('https://api.example.com/api/tenant/resolve?host=campus-a.example.com', {
      host: 'api.example.com',
      origin: 'https://campus-a.example.com',
      'x-forwarded-host': 'attacker.example.com',
    }),
    async (sql, params) => {
      calls.push({ sql, params });
      return tenantRow();
    },
  );
  assert.equal(result.tenant.id, TENANT_ID);
  assert.deepEqual(calls[0].params, ['campus-a.example.com']);
  assert.match(calls[0].sql, /d\.status = 'active' and t\.status = 'active'/);
}

await expectHttpError(
  () => resolveTenantRoute(
    requestContext('https://api.example.com/api/tenant/resolve?host=unknown.example.com', {
      host: 'api.example.com',
      origin: 'https://unknown.example.com',
    }),
    async () => null,
  ),
  404,
  'TENANT_DOMAIN_NOT_BOUND',
);

await expectHttpError(
  () => resolveTenantRoute(
    requestContext('https://api.example.com/api/tenant/resolve?host=campus-a.example.com&tenantCode=campus-b', {
      host: 'api.example.com',
      origin: 'https://campus-a.example.com',
    }),
    async () => tenantRow(),
  ),
  409,
  'TENANT_LOCATOR_CONFLICT',
);

await expectHttpError(
  () => resolveTenantRoute(
    requestContext('https://api.example.com/api/tenant/resolve?host=campus-a.example.com', {
      host: 'api.example.com',
      origin: 'https://campus-b.example.com',
    }),
    async () => tenantRow(),
  ),
  409,
  'TENANT_HOST_CONFLICT',
);

console.log('[PASS] Tenant resolve fail-closed contract');