import { tap, expect } from '@git.zone/tstest/tapbundle';
import { DcRouter } from '../ts/classes.dcrouter.js';
import { RouteConfigManager } from '../ts/config/index.js';
import { DcRouterDb, DomainDoc, RouteDoc } from '../ts/db/index.js';
import { DnsManager } from '../ts/dns/manager.dns.js';
import { logger } from '../ts/logger.js';
import * as plugins from '../ts/plugins.js';

const createTestDb = async () => {
  const storagePath = plugins.path.join(
    plugins.os.tmpdir(),
    `dcrouter-dns-runtime-routes-${Date.now()}-${Math.random().toString(16).slice(2)}`,
  );

  DcRouterDb.resetInstance();
  const db = DcRouterDb.getInstance({
    storagePath,
    dbName: `dcrouter-test-${Date.now()}-${Math.random().toString(16).slice(2)}`,
  });
  await db.start();
  await db.getDb().mongoDb.createCollection('__test_init');

  return {
    async cleanup() {
      await db.stop();
      DcRouterDb.resetInstance();
      await plugins.fs.promises.rm(storagePath, { recursive: true, force: true });
    },
  };
};

const testDbPromise = createTestDb();

const clearTestState = async () => {
  for (const route of await RouteDoc.findAll()) {
    await route.delete();
  }
  for (const domain of await DomainDoc.findAll()) {
    await domain.delete();
  }
};

tap.test('RouteConfigManager persists DoH system routes and hydrates runtime socket handlers', async () => {
  await testDbPromise;
  await clearTestState();

  const dcRouter = new DcRouter({
    dnsNsDomains: ['ns1.example.com', 'ns2.example.com'],
    dnsScopes: ['example.com'],
    smartProxyConfig: { routes: [] },
    dbConfig: { enabled: false },
  });

  const appliedRoutes: any[][] = [];
  const smartProxy = {
    updateRoutes: async (routes: any[]) => {
      appliedRoutes.push(routes);
    },
  };

  const routeManager = new RouteConfigManager(
    () => smartProxy as any,
    undefined,
    undefined,
    undefined,
    undefined,
    undefined,
    (storedRoute: any) => (dcRouter as any).hydrateStoredRouteForRuntime(storedRoute),
  );

  await routeManager.initialize([], [], (dcRouter as any).generateDnsRoutes({ includeSocketHandler: false }));

  const persistedRoutes = await RouteDoc.findAll();
  expect(persistedRoutes.length).toEqual(2);
  expect(persistedRoutes.every((route) => route.origin === 'dns')).toEqual(true);
  expect((await RouteDoc.findByName('dns-over-https-dns-query'))?.systemKey).toEqual('dns:dns-over-https-dns-query');
  expect((await RouteDoc.findByName('dns-over-https-resolve'))?.systemKey).toEqual('dns:dns-over-https-resolve');

  const mergedRoutes = routeManager.getMergedRoutes().routes;
  expect(mergedRoutes.length).toEqual(2);
  expect(mergedRoutes.every((route) => route.origin === 'dns')).toEqual(true);
  expect(mergedRoutes.every((route) => route.systemKey?.startsWith('dns:'))).toEqual(true);

  expect(appliedRoutes.length).toEqual(1);

  for (const routeSet of appliedRoutes) {
    const dnsQueryRoute = routeSet.find((route) => route.name === 'dns-over-https-dns-query');
    const resolveRoute = routeSet.find((route) => route.name === 'dns-over-https-resolve');

    expect(dnsQueryRoute).toBeDefined();
    expect(resolveRoute).toBeDefined();
    expect(typeof dnsQueryRoute.action.socketHandler).toEqual('function');
    expect(typeof resolveRoute.action.socketHandler).toEqual('function');
  }
});

tap.test('RouteConfigManager backfills existing DoH system routes by name without duplicating them', async () => {
  await testDbPromise;
  await clearTestState();

  const dcRouter = new DcRouter({
    dnsNsDomains: ['ns1.example.com', 'ns2.example.com'],
    dnsScopes: ['example.com'],
    smartProxyConfig: { routes: [] },
    dbConfig: { enabled: false },
  });

  const staleDnsQueryRoute = new RouteDoc();
  staleDnsQueryRoute.id = 'stale-doh-query';
  staleDnsQueryRoute.route = {
    name: 'dns-over-https-dns-query',
    match: {
      ports: [443],
      domains: ['ns1.example.com'],
      path: '/dns-query',
    },
    action: {
      type: 'socket-handler' as any,
    } as any,
  };
  staleDnsQueryRoute.enabled = true;
  staleDnsQueryRoute.createdAt = Date.now();
  staleDnsQueryRoute.updatedAt = Date.now();
  staleDnsQueryRoute.createdBy = 'test';
  staleDnsQueryRoute.origin = 'dns';
  await staleDnsQueryRoute.save();

  const appliedRoutes: any[][] = [];
  const smartProxy = {
    updateRoutes: async (routes: any[]) => {
      appliedRoutes.push(routes);
    },
  };

  const routeManager = new RouteConfigManager(
    () => smartProxy as any,
    undefined,
    undefined,
    undefined,
    undefined,
    undefined,
    (storedRoute: any) => (dcRouter as any).hydrateStoredRouteForRuntime(storedRoute),
  );
  await routeManager.initialize([], [], (dcRouter as any).generateDnsRoutes({ includeSocketHandler: false }));

  const remainingRoutes = await RouteDoc.findAll();
  expect(remainingRoutes.length).toEqual(2);
  expect(remainingRoutes.filter((route) => route.route.name === 'dns-over-https-dns-query').length).toEqual(1);
  expect(remainingRoutes.filter((route) => route.route.name === 'dns-over-https-resolve').length).toEqual(1);

  const queryRoute = await RouteDoc.findByName('dns-over-https-dns-query');
  expect(queryRoute?.id).toEqual('stale-doh-query');
  expect(queryRoute?.systemKey).toEqual('dns:dns-over-https-dns-query');

  const resolveRoute = await RouteDoc.findByName('dns-over-https-resolve');
  expect(resolveRoute?.systemKey).toEqual('dns:dns-over-https-resolve');

  expect(appliedRoutes.length).toEqual(1);
  expect(appliedRoutes[0].length).toEqual(2);
  expect(appliedRoutes[0].every((route) => typeof route.action.socketHandler === 'function')).toEqual(true);
});

tap.test('RouteConfigManager only allows toggling system routes', async () => {
  await testDbPromise;
  await clearTestState();

  const smartProxy = {
    updateRoutes: async (_routes: any[]) => {
      return;
    },
  };

  const routeManager = new RouteConfigManager(() => smartProxy as any);
  await routeManager.initialize([
    {
      name: 'system-config-route',
      match: {
        ports: [443],
        domains: ['app.example.com'],
      },
      action: {
        type: 'forward',
        targets: [{ host: '127.0.0.1', port: 8443 }],
        tls: { mode: 'terminate' as const },
      },
    } as any,
  ], [], []);

  const systemRoute = routeManager.getMergedRoutes().routes.find((route) => route.route.name === 'system-config-route');
  expect(systemRoute).toBeDefined();

  const updateResult = await routeManager.updateRoute(systemRoute!.id, {
    route: { name: 'renamed-system-route' } as any,
  });
  expect(updateResult.success).toEqual(false);
  expect(updateResult.message).toEqual('System routes are managed by the system and can only be toggled');

  const deleteResult = await routeManager.deleteRoute(systemRoute!.id);
  expect(deleteResult.success).toEqual(false);
  expect(deleteResult.message).toEqual('System routes are managed by the system and cannot be deleted');

  const toggleResult = await routeManager.toggleRoute(systemRoute!.id, false);
  expect(toggleResult.success).toEqual(true);
  expect((await RouteDoc.findById(systemRoute!.id))?.enabled).toEqual(false);
});

tap.test('DnsManager warning keeps dnsNsDomains in scope', async () => {
  await testDbPromise;
  await clearTestState();
  const originalLog = logger.log.bind(logger);
  const warningMessages: string[] = [];

  (logger as any).log = (level: 'error' | 'warn' | 'info' | 'success' | 'debug', message: string, context?: Record<string, any>) => {
    if (level === 'warn') {
      warningMessages.push(message);
    }
    return originalLog(level, message, context || {});
  };

  try {
    const existingDomain = new DomainDoc();
    existingDomain.id = 'existing-domain';
    existingDomain.name = 'example.com';
    existingDomain.source = 'dcrouter';
    existingDomain.authoritative = true;
    existingDomain.createdAt = Date.now();
    existingDomain.updatedAt = Date.now();
    existingDomain.createdBy = 'test';
    await existingDomain.save();

    const dnsManager = new DnsManager({
      dnsNsDomains: ['ns1.example.com'],
      dnsScopes: ['example.com'],
      dnsRecords: [{ name: 'www.example.com', type: 'A', value: '127.0.0.1' }],
      smartProxyConfig: { routes: [] },
    });

    await dnsManager.start();

    expect(
      warningMessages.some((message) =>
        message.includes('ignoring legacy dnsScopes/dnsRecords constructor config')
        && message.includes('dnsNsDomains is still required for nameserver and DoH bootstrap'),
      ),
    ).toEqual(true);
    expect(
      warningMessages.some((message) =>
        message.includes('ignoring legacy dnsScopes/dnsRecords/dnsNsDomains constructor config'),
      ),
    ).toEqual(false);
  } finally {
    (logger as any).log = originalLog;
  }
});

tap.test('cleanup test db', async () => {
  await clearTestState();
  const testDb = await testDbPromise;
  await testDb.cleanup();
});

export default tap.start();