package archive

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

// The move archive carries <host>.env byte for byte, so the instance key
// lands on the target exactly as the source minted it (L21: the key is the
// exact bytes the env file yields).
func TestArchiveCarriesTheInstanceKeyByteForByte(t *testing.T) {
	dir, env := filesFixture(t)
	body := []byte("CARLOS_ADMIN_TOKEN=t\nCARLOS_INSTANCE_KEY=q+/Zk3vJ0aW1Yx9sR7tUe2oPl4mN8bC6dF5gH0iJ1kA=\n")
	mustWrite(t, env, body, 0o600)
	var built bytes.Buffer
	if _, _, _, err := Build(dir, env, &built); err != nil {
		t.Fatal(err)
	}
	out := filepath.Join(t.TempDir(), "out")
	outEnv := filepath.Join(t.TempDir(), "out.env")
	if err := Extract(bytes.NewReader(built.Bytes()), out, outEnv); err != nil {
		t.Fatal(err)
	}
	got, err := os.ReadFile(outEnv)
	if err != nil || !bytes.Equal(got, body) {
		t.Fatalf("extracted env differs from the source's: %d bytes, want %d (err %v)", len(got), len(body), err)
	}
}