package play

import (
	"testing"

	"github.com/stretchr/testify/assert"

	"opslag.de/schobers/geom"
)

func createIsometricProjection() *IsometricProjection {
	return NewIsometricProjection(geom.PtF32(23, 11), geom.RectRelF32(0, 0, 160, 160))
}

func TestViewToTile(t *testing.T) {
	p := createIsometricProjection()
	assert.Equal(t, geom.PtF32(0, 0), p.ViewToTile(geom.PtF32(80, 80)))
	assert.Equal(t, geom.PtF32(-1, 1), p.ViewToTile(geom.PtF32(57, 80)))
	assert.Equal(t, geom.PtF32(2, 2), p.ViewToTile(geom.PtF32(80, 102)))
	assert.Equal(t, geom.PtF32(-1, -3), p.ViewToTile(geom.PtF32(103, 58)))
}

func TestViewToTileInt(t *testing.T) {
	p := createIsometricProjection()
	assert.Equal(t, geom.Pt(0, 0), p.ViewToTileInt(geom.PtF32(80, 80)))
	assert.Equal(t, geom.Pt(0, 0), p.ViewToTileInt(geom.PtF32(69, 80)))
	assert.Equal(t, geom.Pt(-1, 1), p.ViewToTileInt(geom.PtF32(68, 80)))
}

func TestTileToView(t *testing.T) {
	p := createIsometricProjection()
	assert.Equal(t, geom.PtF32(80, 80), p.TileToView(geom.PtF32(0, 0)))
	assert.Equal(t, geom.PtF32(57, 80), p.TileToView(geom.PtF32(-1, 1)))
	assert.Equal(t, geom.PtF32(80, 102), p.TileToView(geom.PtF32(2, 2)))
	assert.Equal(t, geom.PtF32(103, 58), p.TileToView(geom.PtF32(-1, -3)))
}