//go:build linux || freebsd
// +build linux freebsd

package sftp

import (
	"net/url"
	"path/filepath"
	"testing"

	"codeberg.org/petrbalvin/goget/internal/core"
	"codeberg.org/petrbalvin/goget/internal/output"
)

// TestSaveSFTPResume verifies the partial-progress sidecar for the
// SFTP single-file path. The SFTP parallel workers don't read attr.Size
// in the download loop, so Total is recorded as 0 (only Downloaded
// is known reliably). A future enhancement could plumb totalSize
// through sftpDownloadFile if more accurate accounting is needed.
func TestSaveSFTPResume(t *testing.T) {
	tmp := t.TempDir()
	out := filepath.Join(tmp, "file.bin")

	u, err := url.Parse("sftp://user@host:22/file.bin")
	if err != nil {
		t.Fatalf("parse URL: %v", err)
	}
	req := &core.DownloadRequest{
		URL:    u,
		Output: out,
	}

	saveSFTPResume(req, 12345)

	meta, err := output.LoadResumeMetadata(out)
	if err != nil {
		t.Fatalf("LoadResumeMetadata: %v", err)
	}
	if meta == nil {
		t.Fatal("expected resume metadata, got nil")
	}
	if meta.Downloaded != 12345 {
		t.Errorf("Downloaded = %d, want 12345", meta.Downloaded)
	}
	if meta.URL != "sftp://user@host:22/file.bin" {
		t.Errorf("URL = %q", meta.URL)
	}
	// Total is 0 because the parallel worker doesn't read attr.Size;
	// the resume code path uses this as "size unknown" and works
	// regardless of Total.
	if meta.Total != 0 {
		t.Errorf("Total = %d, want 0 (size unknown for SFTP parallel workers)", meta.Total)
	}
}