// Standalone benchmark for dataset hash operations
package worker_test

import (
	"os"
	"path/filepath"
	"testing"

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

// BenchmarkSequentialHash profiles sequential directory hashing
func BenchmarkSequentialHash(b *testing.B) {
	tmpDir := b.TempDir()

	// Create test files
	for i := 0; i < 50; i++ {
		subdir := filepath.Join(tmpDir, "data", string(rune('a'+i%26)))
		os.MkdirAll(subdir, 0750)
		data := make([]byte, 100*1024) // 100KB each
		os.WriteFile(filepath.Join(subdir, "chunk.bin"), data, 0640)
	}

	b.ResetTimer()
	b.ReportAllocs()

	for i := 0; i < b.N; i++ {
		_, err := worker.DirOverallSHA256Hex(tmpDir)
		if err != nil {
			b.Fatal(err)
		}
	}
}

// BenchmarkParallelHash profiles parallel directory hashing
func BenchmarkParallelHash(b *testing.B) {
	tmpDir := b.TempDir()

	// Create test files
	for i := 0; i < 50; i++ {
		subdir := filepath.Join(tmpDir, "data", string(rune('a'+i%26)))
		os.MkdirAll(subdir, 0750)
		data := make([]byte, 100*1024) // 100KB each
		os.WriteFile(filepath.Join(subdir, "chunk.bin"), data, 0640)
	}

	b.ResetTimer()
	b.ReportAllocs()

	for i := 0; i < b.N; i++ {
		_, err := worker.DirOverallSHA256Hex(tmpDir)
		if err != nil {
			b.Fatal(err)
		}
	}
}
