package world

import (
	"image/color"
	"testing"

	"github.com/stretchr/testify/require"
)

func TestWorldRender_AppliesLineStyle(t *testing.T) {
	t.Parallel()

	w := NewWorld(10, 10)
	w.resetGrid(2 * SCALE)

	_, err := w.AddLine(9, 5, 1, 5)
	require.NoError(t, err)

	for _, obj := range w.objects {
		w.indexObject(obj)
	}

	custom := DefaultRenderStyle()
	custom.LineWidthPx = 3
	custom.LineDash = []float64{5, 2}
	custom.LineDashOffset = 1
	custom.LineStroke = color.RGBA{R: 255, A: 255}

	params := RenderParams{
		ViewportWidthPx:  10,
		ViewportHeightPx: 10,
		MarginXPx:        2,
		MarginYPx:        2,
		CameraXWorldFp:   5 * SCALE,
		CameraYWorldFp:   5 * SCALE,
		CameraZoom:       1.0,
		Options: &RenderOptions{
			Layers: []RenderLayer{RenderLayerLines},
			Style:  &custom,
		},
	}

	d := &fakePrimitiveDrawer{}
	err = w.Render(d, params)
	require.NoError(t, err)

	// There must be at least one AddLine call, and every AddLine must observe
	// the configured line state snapshot.
	cmds := d.CommandsByName("AddLine")
	require.NotEmpty(t, cmds)

	for _, cmd := range cmds {
		require.Equal(t, 3.0, cmd.LineWidth)
		require.Equal(t, []float64{5, 2}, cmd.Dashes)
		require.Equal(t, 1.0, cmd.DashOffset)
		require.Equal(t, color.RGBA{R: 255, A: 255}, cmd.StrokeColor)
	}
}