import fs from "fs-extra";

import dotenv from "dotenv";
import ft from "file-type";
import core from "file-type/core";
import path, { resolve } from "path";
import { logger } from "../server";
import { FolderPaths } from "./serverInit";

//const heicConverter = require("heic-convert");
import gm from "gm";
var imageMagick = gm.subClass({ imageMagick: true });

//gm.subClass();
dotenv.config({
  path: resolve(process.cwd(), `.env.${process.env.NODE_ENV || "development"}`),
});

export async function ConvertHeicFiles(files: Express.Multer.File[]) {
  for (const file of files) {
    const type: core.FileTypeResult | undefined = await ft.fromFile(file.path);
    if (type?.mime === "image/heic") {
      logger.log(
        "debug",
        `Converting ${file.filename} image to JPEG from HEIC.`
      );
      const convertedFileName = `${
        path.parse(path.basename(file.originalname)).name
      }-${Math.floor(Date.now() / 1000)}.jpeg`;

      await ConvertToJpeg(
        file.path,
        `${file.destination}/${convertedFileName}`
      );
      //Move the HEIC.
      if (process.env.KEEP_CONVERTED_ORIGINALS) {
        await fs.ensureDir(
          path.join(file.destination, FolderPaths.ConvertedOriginalSubDir)
        );
        await fs.move(
          file.path,
          `${path.join(
            file.destination,
            FolderPaths.ConvertedOriginalSubDir
          )}/${file.filename}`
        );
      } else {
        await fs.unlink(file.destination);
      }
      //Update the multer file entry.

      file.filename = convertedFileName;
      file.mimetype = "image/jpeg";
      file.path = `${file.destination}/${convertedFileName}`;
    }
  }
}

async function ConvertToJpeg(file: string, newPath: string) {
  const fileOnDisk: Buffer = await fs.readFile(file);

  return new Promise<string>((resolve, reject) => {
    const result = imageMagick(fileOnDisk)
      .setFormat("jpg")
      .write(newPath, (error) => {
        if (error) reject(error.message);
        resolve(newPath);
      });
  });
}