import sharp from 'sharp';
import sizeOf from 'image-size';
import fs from 'fs';
import {log} from '../logger/logger';

export default function createPngFiles(filePath, buffer) {
  console.log(sharp.format);
  const pngPath = filePath.replace(/\.svg$/, '');
  const errorMsg = {
    status: 1,
  };

  return new Promise((resolve, reject) => {
    try {
      const dimensions = sizeOf(filePath);
      const width = dimensions.width;
      const height = dimensions.height;

      if (!fs.existsSync(`./${pngPath}`)) {
        fs.mkdirSync(`./${pngPath}`);
      }
      const promisesToMake = [
        convert(buffer, 3 * width, 3 * height, 'large', pngPath),
        convert(buffer, 2 * width, 2 * height, 'medium', pngPath),
        convert(buffer, width, height, 'small', pngPath)
      ];
      const promises = Promise.all(promisesToMake);
      promises.then(() => {
        return resolve('Successfully converted');
      }).catch((err) => {
        const logErrMsg = {message: 'Failed while converting to PNGs.'};
        log.error('createPngFiles', err, null, null, logErrMsg);
        errorMsg.message = err.message;
        return reject(errorMsg);
      })

    } catch (error) {
      log.error('createPngFiles catch block', error, null, null, "Error in Creating Png Files" + error.message);
      return reject(error);
    }
  });
}

function convert(buffer, width, height, name, pngPath) {
  return new Promise((resolve, reject) => {
    try {
      log.info('createPngFiles process started for resizing to (' + width + '*' + height + ')');
      sharp(buffer)
        .resize(width, height)
        .toFile(`./${pngPath}/${name}.png`, (err, info) => {
          if (err) {
            log.error('Printing error.......: ', err);
            return reject(err);
          }
          log.info('Printing info', info);
          return resolve(pngPath)
        })
    } catch (error) {
      const errorMessage = "Error in Resizing to (" + width + "*" + height + "). Reason :";
      log.error('createPngFiles convert catch block', error, null, null, errorMessage + error.message);
      return reject(error);
    }
  })
}