package elements

import (
	"context"
	"image/color"

	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/vector"
	"golang.org/x/image/font"
)
import "git.vezzani.net/ben/games/common/ux/v1"

type XAlign int
type YAlign int

const (
	AlignCente XAlign = iota
	AlignLeft
	AlignRight
)

const (
	AlignCenter YAlign = iota
	AlignTop
	AlignBottom
)

type Button struct {
	mouseHandler
	Block
	Label        string
	OnClick      func() error
	OnRightClick func() error
	Style        struct {
		MouseDownColor *color.Color
	}
}

func (b *Button) HandleClick(_ MouseState) error {
	if b.OnClick == nil {
		return nil
	}
	return b.OnClick()
}

func (b *Button) getFont() font.Face {
	if b.Block.Style.Font == nil {
		return ux.FontFace
	}

	return *b.Block.Style.Font
}

func (b *Button) backgroundColor() color.Color {
	var c *color.Color
	if b.Block.Style.BackgroundColor != nil {
		c = b.Block.Style.BackgroundColor
	} else {
		c = &ux.BackgroundColor
	}

	if (b.mouseState.RightDown || b.mouseState.LeftDown) && b.Style.MouseDownColor != nil {
		c = b.Style.MouseDownColor
	}

	return *c
}

func (b *Button) Draw(ctx context.Context, image *ebiten.Image) error {
	xz, yz := GetZero(ctx)
	w, h := b.size(ctx)

	vector.StrokeRect(image, xz, yz, w, h, 1, b.backgroundColor(), true)

	return nil
}