package svg

import "fmt"

// TODO: consider reworking this WHOLE API/PACKAGE to make it more of a chaining API.

type (
	PreserveAspectRatio struct {
		Align       *AlignValue
		MeetOrSlice MeetOrSliceValue
	}

	AlignValue struct {
		X AlignValueComponent
		Y AlignValueComponent
	}
	AlignValueComponent int
	MeetOrSliceValue    int
)

const (
	AlignMid AlignValueComponent = iota
	AlignMin
	AlignMax

	_ MeetOrSliceValue = iota
	Meet
	Slice
)

func (r PreserveAspectRatio) PrintKey() string {
	return "preserveAspectRatio"
}

func (r PreserveAspectRatio) PrintValue() (string, bool) {
	if mos := r.MeetOrSlice.String(); mos != "" {
		return fmt.Sprintf(`"%s %s"`, r.Align, mos), true
	}

	return fmt.Sprintf("%q", r.Align), true
}

func (v *AlignValue) String() string {
	if v == nil {
		return "none"
	}
	return fmt.Sprintf("x%sY%s", v.X, v.Y)
}

func (v AlignValueComponent) String() string {
	switch v {
	case AlignMin:
		return "Min"
	case AlignMax:
		return "Max"
	default:
		return "Mid"
	}
}

func (v MeetOrSliceValue) String() string {
	switch v {
	case Meet:
		return "meet"
	case Slice:
		return "slice"
	default:
		return ""
	}
}