import { Request, Response } from "express";
import StreamService from "../services/streamService";
import { Logger } from "pino";

export default class StreamController {
  constructor(
    private streamService: StreamService,
    private logger: Logger,
  ) {}

  // GET /api/streams/:key
  async streamAudio(req: Request, res: Response) {
    const { fileName: key } = req.params as { fileName: string };
    const range = req.headers.range as string | undefined;
    if (!key) return res.status(400).send("Missing file key");

    try {
      this.logger.info(
        `Attempting to stream file: ${key}, range: ${range || "none"}`,
      );
      const result = await this.streamService.streamFromS3({ key, range });
      this.logger.info(
        `Streaming successful for ${key}, status: ${result.status}, content-length: ${result.headers["Content-Length"]}`,
      );
      res.writeHead(result.status, result.headers);
      result.body.pipe(res);
    } catch (err: any) {
      this.logger.error({ err, key }, `Error streaming audio file ${key}`);
      const message = err?.message || "Error streaming audio";
      const status = err?.statusCode || 500;
      res.status(status).send(message);
    }
  }
}