package stacks

import (
	"git.vezzani.net/ben/games/common/elements/v1/core"
	"git.vezzani.net/ben/games/common/elements/v1/mouse"

	"github.com/hajimehoshi/ebiten/v2"
)

func New(ops ...OptFunc) *Stack {
	s := Stack{}
	for op := range ops {
		ops[op](&s)
	}

	var cw, ch int
	anchor := s.Anchor()
	for _, c := range s.Children() {
		c.SetAnchor(anchor)
		cw, ch = c.Size()
		if s.horizontal {
			anchor.X += cw
		} else {
			anchor.Y += ch
		}
	}

	return &s
}

type Stack struct {
	core.Element
	mouse.NopHandler
	horizontal bool
}

func (s *Stack) Size() (w, h int) {
	var cw, ch int
	for _, c := range s.Children() {
		cw, ch = c.Size()
		if s.horizontal {
			w += cw
			if h < ch {
				h = ch
			}
		} else {
			h += ch
			if w < cw {
				w = cw
			}
		}
	}

	return
}

func (s *Stack) Draw(image *ebiten.Image) {
	for _, c := range s.Children() {
		c.Draw(image)
	}
}