import { Controller, Get, Inject } from '@nestjs/common';
import { ApiOkResponse, ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';

import { HealthService } from './health.service';
import { type HealthReport, HealthResponseDto } from './health.types';

@ApiTags('platform')
@Controller('health')
export class HealthController {
  constructor(@Inject(HealthService) private readonly healthService: HealthService) {}

  @Get()
  @ApiOperation({
    summary: '健康检查',
    description: '真实检查 PostgreSQL 与 Redis；任一不可用返回 503 与统一错误体。',
  })
  @ApiOkResponse({ type: HealthResponseDto, description: '全部依赖健康' })
  @ApiResponse({
    status: 503,
    description: '依赖不可用（错误码 50002），details 内附各依赖检查结果',
  })
  async check(): Promise<HealthReport> {
    return this.healthService.check();
  }
}