package svgtemplate

// Data holds dynamic values for the SVG mask template.
type Data struct {
	Size        float64
	Bleed       float64
	Margin      float64
	Padding     float64
	ViewBoxMin  float64
	ViewBoxSize float64
	MaskSize    float64
	OuterSize   float64
	OuterOffset float64
	InnerSize   float64
	InnerOffset float64
	MarkLength  float64
}

const defaultMarkLength = 6.0 // mm

// Build computes template data from product dimensions.
func Build(size, bleed, margin, padding float64) Data {
	offset := bleed + margin + defaultMarkLength
	viewBoxMin := -offset
	viewBoxSize := size + (offset * 2)

	return Data{
		Size:        size,
		Bleed:       bleed,
		Margin:      margin,
		Padding:     padding,
		ViewBoxMin:  viewBoxMin,
		ViewBoxSize: viewBoxSize,
		MarkLength:  defaultMarkLength,
		MaskSize:    size,
		OuterSize:   size + (bleed * 2),
		OuterOffset: -bleed,
		InnerSize:   size - (padding * 2),
		InnerOffset: padding,
	}
}