package benchmarks

import (
	"testing"

	"github.com/jfraeys/fetch_ml/internal/worker"
)

// BenchmarkContextReuse measures overhead of repeated hash operations
// This verifies the 5-20ms savings from context reuse in native_bridge_libs.go
func BenchmarkContextReuse(b *testing.B) {
	// Small test directory to emphasize context overhead vs I/O
	testDir := "./testdata/small_dataset"
	
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_, err := worker.DirOverallSHA256HexParallel(testDir)
		if err != nil {
			b.Fatal(err)
		}
	}
}

// BenchmarkSequentialHashes simulates TUI scrolling through datasets
// With context reuse: ~8ms per hash
// Without context reuse: ~17ms per hash (9ms overhead)
func BenchmarkSequentialHashes(b *testing.B) {
	testDir := "./testdata/small_dataset"
	
	b.ReportAllocs()
	b.ResetTimer()
	
	for i := 0; i < b.N; i++ {
		// Simulate viewing 10 datasets (like TUI scrolling)
		for j := 0; j < 10; j++ {
			_, err := worker.DirOverallSHA256HexParallel(testDir)
			if err != nil {
				b.Fatal(err)
			}
		}
	}
}