package drawer

import (
	"image"

	"gitea.unprism.ru/yotia/display-test/display"
)

type drawer struct {
	dev display.Display

	img *image.Gray
}

type Drawer interface {
	GetDisplay() display.Display

	Clear()
	Flush()

	PutText(x, y int, text string)

	PutBar(x0, y0, x1, y1, color int)
	FillBar(x0, y0, x1, y1, color int)
}

func New(dev display.Display) Drawer {
	d := &drawer{
		dev: dev,
	}

	d.img = d.dev.GetImg()
	return d
}

func (d *drawer) GetDisplay() display.Display {
	return d.dev
}

func (d *drawer) Clear() {
	d.dev.LockImg()
	defer d.dev.UnlockImg()

	for i := range d.img.Pix {
		d.img.Pix[i] = 0
	}
}

func (d *drawer) Flush() {
	// Flush all pages
	d.dev.Flush(0, 0)
	d.dev.Flush(0, 1)
	d.dev.Flush(0, 2)
	d.dev.Flush(0, 3)
	d.dev.Flush(1, 0)
	d.dev.Flush(1, 1)
	d.dev.Flush(1, 2)
	d.dev.Flush(1, 3)
}