import { Controller, Get } from '@nestjs/common';
import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
import { Public } from '../auth/decorators/auth.decorators';

interface HealthCheckResult {
  status: 'ok' | 'error';
  info?: Record<string, unknown>;
  error?: Record<string, unknown>;
  details?: Record<string, unknown>;
}

@ApiTags('health')
@Controller('health')
@Public()
export class HealthController {
  @Get()
  @ApiOperation({ summary: 'Basic health check' })
  @ApiResponse({ status: 200, description: 'Application is healthy' })
  check(): { status: string; timestamp: string } {
    return {
      status: 'ok',
      timestamp: new Date().toISOString(),
    };
  }

  @Get('live')
  @ApiOperation({ summary: 'Liveness probe for Kubernetes' })
  @ApiResponse({ status: 200, description: 'Application is alive' })
  liveness(): { status: string } {
    return { status: 'ok' };
  }

  @Get('ready')
  @ApiOperation({ summary: 'Readiness probe for Kubernetes' })
  @ApiResponse({
    status: 200,
    description: 'Application is ready to accept traffic',
  })
  readiness(): HealthCheckResult {
    // In the future, check database connection, Redis, etc.
    return {
      status: 'ok',
      details: {
        database: { status: 'up' },
      },
    };
  }
}