helix-engage-server/src/health/health.controller.ts

import { Controller, Get, Logger } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import axios from 'axios';

@Controller('api/health')
export class HealthController {
    private readonly logger = new Logger(HealthController.name);
    private readonly graphqlUrl: string;

    constructor(private config: ConfigService) {
        this.graphqlUrl = config.get<string>('platform.graphqlUrl')!;
    }

    @Get()
    async check() {
        let platformReachable = false;
        let platformLatency = 0;

        try {
            const start = Date.now();
            await axios.post(this.graphqlUrl, { query: '{ __typename }' }, {
                headers: { 'Content-Type': 'application/json' },
                timeout: 5000,
            });
            platformLatency = Date.now() - start;
            platformReachable = true;
        } catch {
            platformReachable = false;
        }

        return {
            status: platformReachable ? 'ok' : 'degraded',
            platform: { reachable: platformReachable, latencyMs: platformLatency },
            ozonetel: { configured: !!process.env.EXOTEL_API_KEY },
            ai: { configured: !!process.env.ANTHROPIC_API_KEY },
        };
    }
}