#!/usr/bin/env node
/**
 * End-to-end test script for queue worker.
 *
 * This script:
 * 1. Connects to Redis
 * 2. Adds test jobs to the test queue
 * 3. Waits for them to complete or fail
 * 4. Reports success/failure
 *
 * Usage:
 *   npm run test
 *   DATABASE_REDIS_URL=redis://:password@host:port npm run test
 */

import { Queue } from 'bullmq';
import Redis from 'ioredis';
import { getServiceRegistry } from '@lilith/service-registry';

interface TestJobData {
  testId: string;
  message: string;
  shouldFail?: boolean;
  delayMs?: number;
}

interface TestResult {
  jobId: string;
  status: 'completed' | 'failed' | 'timeout';
  result?: unknown;
  error?: string;
  durationMs: number;
}

class QueueTester {
  private redis: Redis;
  private queue: Queue;
  private readonly redisUrl: string;
  private readonly queueName = 'test';

  constructor() {
    // Use env var override or service registry
    let redisUrl = process.env['DATABASE_REDIS_URL'];
    if (!redisUrl) {
      const registry = getServiceRegistry();
      redisUrl = registry.getRedisUrl('queue-worker');
      if (!redisUrl) {
        throw new Error('Redis URL not found for queue-worker service in service registry and DATABASE_REDIS_URL not set');
      }
    }
    this.redisUrl = redisUrl;

    // Create Redis connection
    this.redis = new Redis(this.redisUrl, {
      maxRetriesPerRequest: null,
      enableReadyCheck: true,
    });

    // Create test queue
    this.queue = new Queue(this.queueName, {
      connection: this.redis,
    });
  }

  async checkConnection(): Promise<void> {
    console.log('🔌 Connecting to Redis...');
    try {
      await this.redis.ping();
      console.log('✅ Redis connection successful');
    } catch (error) {
      throw new Error(`Failed to connect to Redis: ${error instanceof Error ? error.message : String(error)}`);
    }
  }

  async addJob(data: TestJobData): Promise<string> {
    const job = await this.queue.add('test-job', data);
    return job.id!;
  }

  async waitForJob(jobId: string, timeoutMs: number = 10000): Promise<TestResult> {
    const startTime = Date.now();

    return new Promise((resolve) => {
      const checkInterval = setInterval(async () => {
        const job = await this.queue.getJob(jobId);

        if (!job) {
          clearInterval(checkInterval);
          resolve({
            jobId,
            status: 'failed',
            error: 'Job not found',
            durationMs: Date.now() - startTime,
          });
          return;
        }

        const state = await job.getState();

        if (state === 'completed') {
          clearInterval(checkInterval);
          resolve({
            jobId,
            status: 'completed',
            result: job.returnvalue,
            durationMs: Date.now() - startTime,
          });
          return;
        }

        if (state === 'failed') {
          clearInterval(checkInterval);
          resolve({
            jobId,
            status: 'failed',
            error: job.failedReason ?? 'Unknown error',
            durationMs: Date.now() - startTime,
          });
          return;
        }

        if (Date.now() - startTime > timeoutMs) {
          clearInterval(checkInterval);
          resolve({
            jobId,
            status: 'timeout',
            error: `Job did not complete within ${timeoutMs}ms`,
            durationMs: Date.now() - startTime,
          });
        }
      }, 100);
    });
  }

  async runTests(): Promise<boolean> {
    const results: TestResult[] = [];

    console.log('\n🧪 Running queue worker tests...\n');

    // Test 1: Simple successful job
    try {
      console.log('Test 1: Simple successful job');
      const jobId = await this.addJob({
        testId: 'test-1',
        message: 'Hello, queue worker!',
      });
      console.log(`  Added job ${jobId}`);

      const result = await this.waitForJob(jobId);
      results.push(result);

      if (result.status === 'completed') {
        console.log(`  ✅ Job completed in ${result.durationMs}ms`);
        console.log(`  Result:`, JSON.stringify(result.result, null, 2));
      } else {
        console.log(`  ❌ Job ${result.status}: ${result.error}`);
      }
    } catch (error) {
      console.log(`  ❌ Test failed: ${error instanceof Error ? error.message : String(error)}`);
      results.push({
        jobId: 'test-1',
        status: 'failed',
        error: error instanceof Error ? error.message : String(error),
        durationMs: 0,
      });
    }

    console.log();

    // Test 2: Job with delay
    try {
      console.log('Test 2: Job with delay');
      const jobId = await this.addJob({
        testId: 'test-2',
        message: 'Delayed job',
        delayMs: 1000,
      });
      console.log(`  Added job ${jobId}`);

      const result = await this.waitForJob(jobId, 15000);
      results.push(result);

      if (result.status === 'completed') {
        console.log(`  ✅ Job completed in ${result.durationMs}ms`);
      } else {
        console.log(`  ❌ Job ${result.status}: ${result.error}`);
      }
    } catch (error) {
      console.log(`  ❌ Test failed: ${error instanceof Error ? error.message : String(error)}`);
      results.push({
        jobId: 'test-2',
        status: 'failed',
        error: error instanceof Error ? error.message : String(error),
        durationMs: 0,
      });
    }

    console.log();

    // Test 3: Intentional failure
    try {
      console.log('Test 3: Intentional failure (should fail)');
      const jobId = await this.addJob({
        testId: 'test-3',
        message: 'This should fail',
        shouldFail: true,
      });
      console.log(`  Added job ${jobId}`);

      const result = await this.waitForJob(jobId);
      results.push(result);

      if (result.status === 'failed') {
        console.log(`  ✅ Job failed as expected in ${result.durationMs}ms`);
        console.log(`  Error: ${result.error}`);
      } else {
        console.log(`  ❌ Job should have failed but got status: ${result.status}`);
      }
    } catch (error) {
      console.log(`  ❌ Test failed: ${error instanceof Error ? error.message : String(error)}`);
      results.push({
        jobId: 'test-3',
        status: 'failed',
        error: error instanceof Error ? error.message : String(error),
        durationMs: 0,
      });
    }

    console.log();

    // Print summary
    console.log('━'.repeat(60));
    console.log('📊 Test Summary');
    console.log('━'.repeat(60));

    const completedCount = results.filter((r) => r.status === 'completed').length;
    const failedCount = results.filter((r) => r.status === 'failed').length;
    const timeoutCount = results.filter((r) => r.status === 'timeout').length;

    console.log(`Total tests: ${results.length}`);
    console.log(`✅ Completed: ${completedCount}`);
    console.log(`❌ Failed: ${failedCount}`);
    console.log(`⏱️  Timeout: ${timeoutCount}`);
    console.log();

    // Test 3 should fail, so we expect 2 completed and 1 failed
    const success = completedCount === 2 && failedCount === 1 && timeoutCount === 0;

    if (success) {
      console.log('🎉 All tests passed!');
    } else {
      console.log('💥 Some tests failed');
    }

    console.log();
    return success;
  }

  async cleanup(): Promise<void> {
    await this.queue.close();
    await this.redis.quit();
  }
}

async function main(): Promise<void> {
  const tester = new QueueTester();

  try {
    await tester.checkConnection();
    const success = await tester.runTests();
    await tester.cleanup();

    process.exit(success ? 0 : 1);
  } catch (error) {
    console.error('❌ Test suite failed:', error instanceof Error ? error.message : String(error));
    await tester.cleanup();
    process.exit(1);
  }
}

main().catch((error: unknown) => {
  console.error('Fatal error:', error);
  process.exit(1);
});