package state

import "fmt"

// HexOrientation is the enum for the direction hexes are facing.
type HexOrientation uint8

const (
	// PointyTop indicates hexes that have a pair of sides on either side in the horizontal direction,
	// and points on the top and bottom in the vertical direction.
	PointyTop HexOrientation = 1
	// FlatTop indicates hexes that have a pair of points on either side in the horizontal direction,
	// and sides on the top and bottom in the vertical direction.
	FlatTop HexOrientation = 2
)

// UnmarshalText unmarshals from the equivalent Javascript constant name.
func (o *HexOrientation) UnmarshalText(text []byte) error {
	switch string(text) {
	case "POINTY_TOP":
		*o = PointyTop
		return nil
	case "FLAT_TOP":
		*o = FlatTop
		return nil
	default:
		return fmt.Errorf("can't unmarshal unknown HexOrientation %s", text)
	}
}

// MarshalText marshals into the equivalent JavaScript constant name.
func (o HexOrientation) MarshalText() (text []byte, err error) {
	switch o {
	case PointyTop, FlatTop:
		return []byte(o.String()), nil
	default:
		return nil, fmt.Errorf("can't marshal unknown HexOrientation %d", o)
	}
}

// String returns the equivalent JavaScript constant name.
func (o HexOrientation) String() string {
	switch o {
	case PointyTop:
		return "POINTY_TOP"
	case FlatTop:
		return "FLAT_TOP"
	default:
		return fmt.Sprintf("[unknown HexOrientation %d]", o)
	}
}