package world

import (
	"image/color"
	"testing"
)

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

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

	// Populate with enough objects to create duplicates across cells.
	// Circles and lines create bbox indexing (more duplicates).
	for i := 0; i < 2000; i++ {
		_, _ = w.AddPoint(float64(i%600), float64((i*7)%600))
	}
	for i := 0; i < 1200; i++ {
		_, _ = w.AddCircle(float64((i*11)%600), float64((i*13)%600), 8.0)
	}
	for i := 0; i < 1200; i++ {
		x1 := float64((i*3 + 10) % 600)
		y1 := float64((i*5 + 20) % 600)
		x2 := float64((i*7 + 400) % 600)
		y2 := float64((i*11 + 300) % 600)
		_, _ = w.AddLine(x1, y1, x2, y2)
	}
	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},
		},
	}

	b.ReportAllocs()
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		_, err := w.buildRenderPlanStageA(params)
		if err != nil {
			b.Fatalf("build plan: %v", err)
		}
	}
}