package Utils

import (
    "github.com/nfnt/resize"
    "image/jpeg"
    "io"
    "os"
	"image"
)

/**
*
* @param {io.Reader} uploadedFile - uploaded image.
* @param {string} - filename.
* @param {int} height - image height.
* @param {int} quality - image quality.
* @return {error} - error handling
*
*/
func ProcessImage(uploadedFile io.Reader, fileName string, height, quality int) error {
    img, _, err := image.Decode(uploadedFile)
    if err != nil {
        return err
    }

    resizedImg := resize.Resize(0, uint(height), img, resize.Lanczos3)

    output, err := os.Create(fileName)
    if err != nil {
        return err
    }
    defer output.Close()

    err = jpeg.Encode(output, resizedImg, &jpeg.Options{Quality: quality})
    if err != nil {
        return err
    }

    return nil
}