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

import { Controller, Post, Body, Logger, HttpException } from '@nestjs/common';
import { RecordingsService } from './recordings.service';
import { SessionService } from '../auth/session.service';

const CACHE_TTL = 7 * 24 * 3600; // 7 days

@Controller('api/recordings')
export class RecordingsController {
    private readonly logger = new Logger(RecordingsController.name);

    constructor(
        private readonly recordings: RecordingsService,
        private readonly session: SessionService,
    ) {}

    @Post('analyze')
    async analyze(@Body() body: { recordingUrl: string; callId?: string }) {
        if (!body.recordingUrl) {
            throw new HttpException('recordingUrl required', 400);
        }

        const cacheKey = body.callId ? `call:analysis:${body.callId}` : null;

        // Check Redis cache first
        if (cacheKey) {
            try {
                const cached = await this.session.getCache(cacheKey);
                if (cached) {
                    this.logger.log(`[RECORDING] Cache hit: ${cacheKey}`);
                    return JSON.parse(cached);
                }
            } catch {}
        }

        this.logger.log(`[RECORDING] Cache miss — analyzing: ${body.recordingUrl} callId=${body.callId ?? 'none'}`);

        try {
            const analysis = await this.recordings.analyzeRecording(body.recordingUrl);
            this.logger.log(`[RECORDING] Analysis complete: ${analysis.transcript.length} utterances, sentiment=${analysis.sentiment}`);

            // Cache the result
            if (cacheKey) {
                this.session.setCache(cacheKey, JSON.stringify(analysis), CACHE_TTL)
                    .catch(err => this.logger.warn(`[RECORDING] Cache write failed: ${err}`));
            }

            return analysis;
        } catch (error: any) {
            this.logger.error(`[RECORDING] Analysis failed: ${error.message}`);
            throw new HttpException(error.message ?? 'Analysis failed', 502);
        }
    }
}