import { Request, Response } from "express";
import fs from "fs-extra";
import multer from "multer";
import path from "path";
import { logger } from "../server";
import GenerateThumbnail from "../util/generateThumbnail";
import generateUniqueFilename from "../util/generateUniqueFilename";
import { ConvertHeicFiles } from "../util/heicConverter";
import { PathToRoFolder } from "../util/pathGenerators";
import { JobsListMedia } from "./jobsListMedia";

export const JobMediaUploadMulter = multer({
  storage: multer.diskStorage({
    destination: function (req, file, cb) {
      const jobid: string = (req.body.jobid || "").trim();
      const DestinationFolder: string = PathToRoFolder(jobid);
      fs.ensureDirSync(DestinationFolder);
      cb(jobid === "" || jobid === null ? new Error("Job ID not specified.") : null, DestinationFolder);
    },
    filename: function (req, file, cb) {
      logger.debug("Uploading file: ", {
        file: path.basename(file.originalname)
      });
      cb(null, generateUniqueFilename(file));
    }
  })
});

export async function jobsUploadMedia(req: Request, res: Response) {
  const jobid: string = (req.body.jobid || "").trim();

  try {
    if (!req.files || (req.files as Express.Multer.File[]).length === 0) {
      logger.warning("Upload contained no files.");
      res.status(400).send({
        status: false,
        message: "No file uploaded"
      });
    } else {
      //If we want to skip waiting for everything, just send it back that we're good.
      if (req.body.skip_thumbnail) {
        req.headers.skipReponse === "true";
        res.sendStatus(200);
      }

      //Check if there's a heic in the file set. If so, modify the file set.
      await ConvertHeicFiles(req.files as Express.Multer.File[]);

      logger.debug(
        "Creating thumbnails for newly uploaded media",
        (req.files as Express.Multer.File[]).map((f) => f.filename)
      );
      const thumbnailGenerationQueue: Promise<string>[] = [];

      //for each file.path, generate the thumbnail.
      (req.files as Express.Multer.File[]).forEach((file) => {
        thumbnailGenerationQueue.push(GenerateThumbnail(file.path));
      });

      await Promise.all(thumbnailGenerationQueue);

      JobsListMedia(req, res);
    }
  } catch (error) {
    logger.error("Error uploading job media.", {
      jobid,
      error: (error as Error).message
    });
    res.status(500).json((error as Error).message);
  }
}