package blocks

import (
	"image/color"

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

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

func New(ops ...OptFunc) elements.InitFunc {
	return func() elements.Element {
		b := Block{}
		for i := range ops {
			ops[i](&b)
		}
		return &b
	}
}

type Block struct {
	anchor          elements.Point
	backgroundColor *color.Color
	mouse.NopHandler
	width, height int
	name          string
}

func (b *Block) SetAnchor(a elements.Point) {
	d := b.anchor.Delta(a)
	for i := range b.Children() {
		b.Children()[i].SetAnchor(b.Children()[i].Anchor().Add(d))
	}
	b.anchor = a
}

func (b *Block) Bounds() elements.Bounds {
	return elements.Bounds{
		Min:    b.anchor,
		Width:  b.width,
		Height: b.height,
	}
}

func (b *Block) Anchor() elements.Point {
	return b.anchor
}

func (b *Block) Size() (w, h int) {
	return b.width, b.height
}

func (b *Block) Draw(image *ebiten.Image) {
	bnd := b.Bounds()
	if b.backgroundColor != nil {
		vector.DrawFilledRect(
			image,
			float32(b.anchor.X),
			float32(b.anchor.Y),
			float32(bnd.Width),
			float32(bnd.Height),
			*b.backgroundColor,
			true,
		)
	}
	return
}

func (b *Block) Children() []elements.Element {
	return nil
}