package releasekit

import (
	"crypto/sha256"
	"encoding/hex"
	"os"
	"path/filepath"
	"testing"

	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gitea"
)

func TestDeclaredBuildAssetsGenerateManifestFromBuildResult(t *testing.T) {
	output := t.TempDir()
	first := []byte("first artifact")
	second := []byte("second artifact")
	firstPath := filepath.Join(output, "zeta.bin")
	secondPath := filepath.Join(output, "alpha.bin")
	if err := os.WriteFile(firstPath, first, 0o600); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(secondPath, second, 0o600); err != nil {
		t.Fatal(err)
	}
	result, err := declaredBuildAssets(BuildResult{Artifacts: []BuildArtifact{
		{Path: firstPath, Filename: "zeta.bin", SHA256: assetDigest(first)},
		{Path: secondPath, Filename: "alpha.bin", SHA256: assetDigest(second)},
	}})
	if err != nil {
		t.Fatal(err)
	}
	if len(result) != 3 || result[0].Filename != "zeta.bin" || result[1].Filename != "alpha.bin" || result[2].Filename != gitea.ManifestFilename {
		t.Fatalf("assets = %#v", result)
	}
	want := assetDigest(second) + "  alpha.bin\n" + assetDigest(first) + "  zeta.bin\n"
	if string(result[2].Content) != want {
		t.Fatalf("manifest = %q, want %q", result[2].Content, want)
	}
	if result[0].Size != int64(len(first)) || result[1].Size != int64(len(second)) {
		t.Fatalf("sizes = %d, %d", result[0].Size, result[1].Size)
	}
}

func TestDeclaredBuildAssetsKeepsSourceOnlyBuildManifestFree(t *testing.T) {
	assets, err := declaredBuildAssets(BuildResult{})
	if err != nil || len(assets) != 0 {
		t.Fatalf("assets = %#v, error = %v", assets, err)
	}
}

func assetDigest(content []byte) string {
	sum := sha256.Sum256(content)
	return hex.EncodeToString(sum[:])
}