import { expect, tap } from '@git.zone/tstest/tapbundle';

import type { ISmartProxyOptions } from '../ts/proxies/smart-proxy/models/interfaces.js';
import type { IRouteConfig } from '../ts/proxies/smart-proxy/models/route-types.js';
import { RoutePreprocessor } from '../ts/proxies/smart-proxy/route-preprocessor.js';
import { buildRustProxyOptions } from '../ts/proxies/smart-proxy/utils/rust-config.js';

tap.test('Rust contract - preprocessor serializes regex headers for Rust', async () => {
  const route: IRouteConfig = {
    name: 'contract-route',
    match: {
      ports: [443, { from: 8443, to: 8444 }],
      domains: ['api.example.com', '*.example.com'],
      transport: 'udp',
      protocol: 'http3',
      headers: {
        'Content-Type': /^application\/json$/i,
      },
    },
    action: {
      type: 'forward',
      targets: [{
        match: {
          ports: [443],
          path: '/api/*',
          method: ['GET'],
          headers: {
            'X-Env': /^(prod|stage)$/,
          },
        },
        host: ['backend-a', 'backend-b'],
        port: 'preserve',
        sendProxyProtocol: true,
        backendTransport: 'tcp',
      }],
      tls: {
        mode: 'terminate',
        certificate: 'auto',
      },
      sendProxyProtocol: true,
      udp: {
        maxSessionsPerIP: 321,
        quic: {
          enableHttp3: true,
        },
      },
    },
    security: {
      ipAllowList: [{
        ip: '10.0.0.0/8',
        domains: ['api.example.com'],
      }],
    },
  };

  const preprocessor = new RoutePreprocessor();
  const [rustRoute] = preprocessor.preprocessForRust([route]);

  expect(rustRoute.match.headers?.['Content-Type']).toEqual('/^application\\/json$/i');
  expect(rustRoute.match.transport).toEqual('udp');
  expect(rustRoute.match.protocol).toEqual('http3');
  expect(rustRoute.action.targets?.[0].match?.headers?.['X-Env']).toEqual('/^(prod|stage)$/');
  expect(rustRoute.action.targets?.[0].port).toEqual('preserve');
  expect(rustRoute.action.targets?.[0].backendTransport).toEqual('tcp');
  expect(rustRoute.action.sendProxyProtocol).toBeTrue();
  expect(rustRoute.action.udp?.maxSessionsPerIp).toEqual(321);
});

tap.test('Rust contract - preprocessor converts dynamic targets to relay-safe payloads', async () => {
  const route: IRouteConfig = {
    name: 'dynamic-contract-route',
    match: {
      ports: 8080,
    },
    action: {
      type: 'forward',
      targets: [{
        host: () => 'dynamic-backend.internal',
        port: () => 9443,
      }],
    },
  };

  const preprocessor = new RoutePreprocessor();
  const [rustRoute] = preprocessor.preprocessForRust([route]);

  expect(rustRoute.action.type).toEqual('socket-handler');
  expect(rustRoute.action.targets?.[0].host).toEqual('localhost');
  expect(rustRoute.action.targets?.[0].port).toEqual(0);
  expect(preprocessor.getOriginalRoute('dynamic-contract-route')).toEqual(route);
});

tap.test('Rust contract - top-level config keeps shared SmartProxy settings', async () => {
  const settings: ISmartProxyOptions = {
    routes: [{
      name: 'top-level-contract-route',
      match: {
        ports: 443,
        domains: 'api.example.com',
      },
      action: {
        type: 'forward',
        targets: [{
          host: 'backend.internal',
          port: 8443,
        }],
        tls: {
          mode: 'terminate',
          certificate: 'auto',
        },
      },
    }],
    preserveSourceIP: true,
    proxyIPs: ['10.0.0.1'],
    acceptProxyProtocol: true,
    sendProxyProtocol: true,
    noDelay: true,
    keepAlive: true,
    keepAliveInitialDelay: 1500,
    maxPendingDataSize: 4096,
    disableInactivityCheck: true,
    enableKeepAliveProbes: true,
    enableDetailedLogging: true,
    enableTlsDebugLogging: true,
    enableRandomizedTimeouts: true,
    connectionTimeout: 5000,
    initialDataTimeout: 7000,
    socketTimeout: 9000,
    inactivityCheckInterval: 1100,
    maxConnectionLifetime: 13000,
    inactivityTimeout: 15000,
    gracefulShutdownTimeout: 17000,
    maxConnectionsPerIP: 20,
    connectionRateLimitPerMinute: 30,
    keepAliveTreatment: 'extended',
    keepAliveInactivityMultiplier: 2,
    extendedKeepAliveLifetime: 19000,
    metrics: {
      enabled: true,
      sampleIntervalMs: 250,
      retentionSeconds: 60,
    },
    acme: {
      enabled: true,
      email: 'ops@example.com',
      environment: 'staging',
      useProduction: false,
      skipConfiguredCerts: true,
      renewThresholdDays: 14,
      renewCheckIntervalHours: 12,
      autoRenew: true,
      port: 80,
    },
  };

  const preprocessor = new RoutePreprocessor();
  const routes = preprocessor.preprocessForRust(settings.routes);
  const config = buildRustProxyOptions(settings, routes);

  expect(config.preserveSourceIp).toBeTrue();
  expect(config.proxyIps).toEqual(['10.0.0.1']);
  expect(config.acceptProxyProtocol).toBeTrue();
  expect(config.sendProxyProtocol).toBeTrue();
  expect(config.noDelay).toBeTrue();
  expect(config.keepAlive).toBeTrue();
  expect(config.keepAliveInitialDelay).toEqual(1500);
  expect(config.maxPendingDataSize).toEqual(4096);
  expect(config.disableInactivityCheck).toBeTrue();
  expect(config.enableKeepAliveProbes).toBeTrue();
  expect(config.enableDetailedLogging).toBeTrue();
  expect(config.enableTlsDebugLogging).toBeTrue();
  expect(config.enableRandomizedTimeouts).toBeTrue();
  expect(config.connectionTimeout).toEqual(5000);
  expect(config.initialDataTimeout).toEqual(7000);
  expect(config.socketTimeout).toEqual(9000);
  expect(config.inactivityCheckInterval).toEqual(1100);
  expect(config.maxConnectionLifetime).toEqual(13000);
  expect(config.inactivityTimeout).toEqual(15000);
  expect(config.gracefulShutdownTimeout).toEqual(17000);
  expect(config.maxConnectionsPerIp).toEqual(20);
  expect(config.connectionRateLimitPerMinute).toEqual(30);
  expect(config.keepAliveTreatment).toEqual('extended');
  expect(config.keepAliveInactivityMultiplier).toEqual(2);
  expect(config.extendedKeepAliveLifetime).toEqual(19000);
  expect(config.metrics?.sampleIntervalMs).toEqual(250);
  expect(config.acme?.email).toEqual('ops@example.com');
  expect(config.acme?.environment).toEqual('staging');
  expect(config.acme?.skipConfiguredCerts).toBeTrue();
  expect(config.acme?.renewThresholdDays).toEqual(14);
});

export default tap.start();