package main

import (
	"io"
	"math"
	"math/rand"
	"time"

	"github.com/hajimehoshi/ebiten"
	"github.com/hajimehoshi/ebiten/ebitenutil"
	"golang.org/x/image/colornames"
)

var obrazok *ebiten.Image
var calkokiller *ebiten.Image
var x float64
var y float64
var d float64 = 50
var z float64 = 50

func update(screen *ebiten.Image) error {
	if ebiten.IsKeyPressed(ebiten.KeyLeft) {
		x -= 5
	}
	if ebiten.IsKeyPressed(ebiten.KeyRight) {
		x += 5
	}
	if ebiten.IsKeyPressed(ebiten.KeyDown) {
		y += 5
	}
	if ebiten.IsKeyPressed(ebiten.KeyUp) {
		y -= 5
	}

	screen.Fill(colornames.White)
	var opts ebiten.DrawImageOptions
	var nopts ebiten.DrawImageOptions
	opts.GeoM.Translate(x, y)
	nopts.GeoM.Translate(d, z)
	z += 7
	if z > 1000 {
		d = rand.Float64() * 800
		z = 0
	}
	if x > 800 {
		x = 0
	}
	if x < 0 {
		x = 800
	}
	if y > 1000 {
		y = 0
	}
	if y < 0 {
		y = 1000
	}
	if math.Abs(x+40-(d+40)) < 110 && math.Abs(y+35-(z+35)) < 45 {
		return io.EOF
	}

	screen.DrawImage(obrazok, &opts)
	screen.DrawImage(calkokiller, &nopts)
	return nil
}

func main() {
	obrazok, _, _ = ebitenutil.NewImageFromFile("sd2.png", ebiten.FilterLinear)
	calkokiller, _, _ = ebitenutil.NewImageFromFile("arrow.png", ebiten.FilterLinear)
	ebiten.Run(update, 800, 1000, 1, "calko IIIIII")
	rand.Seed(time.Now().UnixNano())
}