package image

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

func TestDownloadDecompressesXZFileURLs(t *testing.T) {
	if _, err := exec.LookPath("xz"); err != nil {
		t.Skip("xz not available")
	}
	dir := t.TempDir()
	raw := filepath.Join(dir, "base.img")
	if err := os.WriteFile(raw, []byte("metis-xz-test"), 0o644); err != nil {
		t.Fatal(err)
	}
	compressed := raw + ".xz"
	cmd := exec.Command("xz", "-zk", raw)
	if out, err := cmd.CombinedOutput(); err != nil {
		t.Fatalf("xz: %v: %s", err, string(out))
	}
	dest := filepath.Join(dir, "copy.img")
	if err := Download("file://"+compressed, dest); err != nil {
		t.Fatalf("Download: %v", err)
	}
	sum := sha256.Sum256([]byte("metis-xz-test"))
	if err := VerifyChecksum(dest, "sha256:"+hex.EncodeToString(sum[:])); err != nil {
		t.Fatalf("VerifyChecksum: %v", err)
	}
}