import fs from "fs-extra";

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

//const heicConverter = require("heic-convert");
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: FileTypeResult | undefined = await fileTypeFromFile(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
      }-${Math.floor(Date.now() / 1000)}.jpeg`;
      try {
        await ConvertToJpeg(file.path, `${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}`;
      } catch (error) {
        logger.log("error", `Error converting ${file.filename} image to JPEG from HEIC. ${JSON.stringify(error)}`);
      }
    }
  }
}

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);
      });
  });
}