package points

import (
	"image"

	"gioui.org/layout"
)

// ContextCenter returns a point representing the center of the provide layout context.
func ContextCenter(gtx layout.Context) image.Point {
	return image.Pt(gtx.Constraints.Max.X/2, gtx.Constraints.Max.Y/2)
}

// ContextCenterSquare returns two points representing the upper left corner (min) and lower right corner (max) of a square around the context center.
func ContextCenterSquare(gtx layout.Context, apothem int) (min image.Point, max image.Point) {
	min = image.Pt(gtx.Constraints.Max.X/2-apothem, gtx.Constraints.Max.Y/2-apothem)
	max = image.Pt(gtx.Constraints.Max.X/2+apothem, gtx.Constraints.Max.Y/2+apothem)
	return
}

// CenterSquare returns two points representing the upper left corner (min) and lower right corner (max) of a square around the given center point.
func CenterSquare(center image.Point, apothem int) (min image.Point, max image.Point) {
	min = image.Pt(center.X-apothem, center.Y-apothem)
	max = image.Pt(center.X+apothem, center.Y+apothem)
	return
}