package main

import (
	lib "git.makerforce.io/photos/photos/pkg/bucket"
	"github.com/davidbyttow/govips/pkg/vips"
)

func readsize(buf []byte) (int, int, error) {
	i, err := vips.NewImageFromBuffer(buf)
	if err != nil {
		return 0, 0, err
	}
	return i.Width(), i.Height(), nil
}

func resize(buf []byte, height int, format vips.ImageType, quality int) ([]byte, error) {
	i, err := vips.NewImageFromBuffer(buf)
	if err != nil {
		return nil, err
	}
	defer i.Close()

	scale := float64(height) / float64(i.Height())
	err = i.Resize(scale)
	if err != nil {
		return nil, err
	}
	outBuf, _, err := i.Export(vips.ExportParams{
		Format:  format,
		Quality: quality,
	})
	return outBuf, err
}

func toVipsImageType(format lib.PhotoFormat) vips.ImageType {
	if format == lib.PhotoFormatWEBP {
		return vips.ImageTypeWEBP
	}
	if format == lib.PhotoFormatJPEG {
		return vips.ImageTypeJPEG
	}
	return vips.ImageTypeUnknown
}