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

import { JwtAuthGuard } from '@common/guards/jwt-auth.guard';
import { RolesGuard } from '@common/guards/roles.guard';
import { Roles } from '@common/decorators/roles.decorator';
import { ApiOkResponse } from '@common/decorators/api-response.decorator';
import { CacheShort, CacheMedium } from '@common/decorators/cache.decorator';

import { PerformanceService } from '@common/services/performance.service';

@ApiTags('Performance - 性能监控')
@Controller('performance')
@UseGuards(JwtAuthGuard, RolesGuard)
export class PerformanceController {
  constructor(private readonly performanceService: PerformanceService) {}

  /**
   * 获取性能概览
   */
  @Get('overview')
  @ApiOperation({ summary: '获取性能概览' })
  @ApiOkResponse('性能概览获取成功')
  @Roles('admin', 'operator')
  @CacheShort('performance_overview')
  async getPerformanceOverview() {
    return await this.performanceService.getPerformanceOverview();
  }

  /**
   * 获取当前系统指标
   */
  @Get('metrics/current')
  @ApiOperation({ summary: '获取当前系统指标' })
  @ApiOkResponse('当前系统指标获取成功')
  @Roles('admin', 'operator')
  async getCurrentMetrics() {
    return await this.performanceService.getCurrentSystemMetrics();
  }

  /**
   * 获取内存使用分析
   */
  @Get('memory')
  @ApiOperation({ summary: '获取内存使用分析' })
  @ApiOkResponse('内存使用分析获取成功')
  @Roles('admin', 'operator')
  @CacheShort('memory_analysis')
  async getMemoryAnalysis() {
    return await this.performanceService.analyzeMemoryUsage();
  }

  /**
   * 获取慢查询列表
   */
  @Get('slow-queries')
  @ApiOperation({ summary: '获取慢查询列表' })
  @ApiOkResponse('慢查询列表获取成功')
  @Roles('admin', 'operator')
  async getSlowQueries(
    @Query('startDate') startDate: string,
    @Query('endDate') endDate: string,
    @Query('limit') limit: number = 10,
  ) {
    const start = startDate ? new Date(startDate) : new Date(Date.now() - 24 * 60 * 60 * 1000);
    const end = endDate ? new Date(endDate) : new Date();
    
    return await this.performanceService.getSlowQueries(start, end, limit);
  }

  /**
   * 获取最新性能报告
   */
  @Get('report/latest')
  @ApiOperation({ summary: '获取最新性能报告' })
  @ApiOkResponse('最新性能报告获取成功')
  @Roles('admin', 'operator')
  async getLatestReport() {
    return await this.performanceService.getLatestPerformanceReport();
  }

  /**
   * 获取优化建议
   */
  @Get('optimization/suggestions')
  @ApiOperation({ summary: '获取性能优化建议' })
  @ApiOkResponse('性能优化建议获取成功')
  @Roles('admin', 'operator')
  @CacheMedium('optimization_suggestions')
  async getOptimizationSuggestions() {
    return await this.performanceService.getOptimizationSuggestions();
  }
}