import { Controller, Post, Get, Body, UseGuards } from '@nestjs/common';
import { ApiTags, ApiOperation, ApiBearerAuth } from '@nestjs/swagger';
import { AuthGuard } from '@nestjs/passport';
import { AiChatService } from '../../../application/services/ai-chat.service';
import { AiCreditService } from '../../../application/services/ai-credit.service';
import { AiPricingService } from '../../../application/services/ai-pricing.service';
import { AiAnomalyService } from '../../../application/services/ai-anomaly.service';

@ApiTags('AI')
@Controller('ai')
export class AiController {
  constructor(
    private readonly chatService: AiChatService,
    private readonly creditService: AiCreditService,
    private readonly pricingService: AiPricingService,
    private readonly anomalyService: AiAnomalyService,
  ) {}

  @Post('chat')
  @UseGuards(AuthGuard('jwt'))
  @ApiBearerAuth()
  @ApiOperation({ summary: 'Chat with AI assistant' })
  async chat(@Body() body: { userId: string; message: string; sessionId?: string }) {
    return { code: 0, data: await this.chatService.chat(body) };
  }

  @Post('credit/score')
  @UseGuards(AuthGuard('jwt'))
  @ApiBearerAuth()
  @ApiOperation({ summary: 'Get AI credit score' })
  async creditScore(@Body() body: any) {
    return { code: 0, data: await this.creditService.getScore(body) };
  }

  @Post('pricing/suggest')
  @UseGuards(AuthGuard('jwt'))
  @ApiBearerAuth()
  @ApiOperation({ summary: 'Get AI pricing suggestion' })
  async pricingSuggestion(@Body() body: any) {
    return { code: 0, data: await this.pricingService.getSuggestion(body) };
  }

  @Post('anomaly/check')
  @UseGuards(AuthGuard('jwt'))
  @ApiBearerAuth()
  @ApiOperation({ summary: 'Check for anomalous activity' })
  async anomalyCheck(@Body() body: any) {
    return { code: 0, data: await this.anomalyService.check(body) };
  }

  @Get('health')
  @ApiOperation({ summary: 'AI service health + external agent status' })
  async health() {
    let agentHealthy = false;
    try {
      const res = await fetch(`${process.env.AI_AGENT_CLUSTER_URL || 'http://localhost:8000'}/health`);
      agentHealthy = res.ok;
    } catch {}
    return { code: 0, data: { service: 'ai-service', status: 'ok', externalAgent: agentHealthy ? 'connected' : 'unavailable' } };
  }
}