import { Readable } from 'stream';
import gm from 'gm';
import { MAX_IMAGE_SIZE, ONLY_RESIZE_IF_IMAGE_IS_BIGGER, TO_BE_RESIZED_DIRECTORY_NAME } from './constants';

const imageMagick = gm.subClass({ imageMagick: true });

export const shouldResizeImage = (filePath: string): boolean => filePath.includes(TO_BE_RESIZED_DIRECTORY_NAME);

export const resizeImageToFitDimensions = (filePath: string): Promise<Readable | Error> =>
    new Promise((resolve, reject) => {
        imageMagick(filePath)
            .resize(MAX_IMAGE_SIZE, MAX_IMAGE_SIZE, ONLY_RESIZE_IF_IMAGE_IS_BIGGER)
            .write(filePath, (err, stdout) => {
                if (err) {
                    reject(Error(`Failed to resize image: ${err}`));
                } else {
                    console.log(`Successfully resized image: ${filePath}`);
                    resolve(stdout);
                }
            });
    });