package world

import (
	"image/color"
	"testing"

	"github.com/fogleman/gg"
)

func BenchmarkDrawPlanSinglePass_DrawItemsReuse(b *testing.B) {
	w := NewWorld(600, 600)

	// Make grid + index available.
	w.IndexOnViewportChange(1000, 700, 1.0)

	// Add enough objects so tiles have candidates.
	for i := range 2000 {
		_, _ = w.AddPoint(float64(i%600), float64((i*7)%600))
	}
	for i := range 500 {
		_, _ = w.AddCircle(float64((i*11)%600), float64((i*13)%600), 5.0)
	}
	w.Reindex()

	params := RenderParams{
		ViewportWidthPx:  1000,
		ViewportHeightPx: 700,
		MarginXPx:        250,
		MarginYPx:        175,
		CameraXWorldFp:   300 * SCALE,
		CameraYWorldFp:   300 * SCALE,
		CameraZoom:       1.0,
		Options: &RenderOptions{
			BackgroundColor: color.RGBA{A: 255},
		},
	}

	plan, err := w.buildRenderPlanStageA(params)
	if err != nil {
		b.Fatalf("build plan: %v", err)
	}

	dc := gg.NewContext(params.CanvasWidthPx(), params.CanvasHeightPx())
	drawer := &GGDrawer{DC: dc}

	b.ReportAllocs()
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		// We don't clear here; we only measure the draw loop overhead.
		w.drawPlanSinglePass(drawer, plan, true, drawPlanSinglePassClipEnabled, false)
	}
}