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

package webdav

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

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

// TestSaveWebDAVResume verifies the partial-progress sidecar written
// by streamWebDAVBody on context cancellation. The ETag and
// Last-Modified headers are preserved so the next --resume attempt
// can send a matching If-Range and either continue or restart
// cleanly depending on the server's view of the file.
func TestSaveWebDAVResume(t *testing.T) {
	tmp := t.TempDir()
	out := filepath.Join(tmp, "file.bin")

	u, _ := url.Parse("webdav://host/file.bin")
	req := &core.DownloadRequest{
		URL:    u,
		Output: out,
		Resume: true,
	}
	resumed := true

	saveWebDAVResume(req, 8192, 1<<20, `"etag-abc"`, "Mon, 01 Jan 2026 00:00:00 GMT", resumed)

	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 != 8192 {
		t.Errorf("Downloaded = %d, want 8192", meta.Downloaded)
	}
	if meta.Total != 1<<20 {
		t.Errorf("Total = %d, want %d", meta.Total, 1<<20)
	}
	if meta.ETag != `"etag-abc"` {
		t.Errorf("ETag = %q", meta.ETag)
	}
	if meta.LastModified != "Mon, 01 Jan 2026 00:00:00 GMT" {
		t.Errorf("LastModified = %q", meta.LastModified)
	}

	// Resume=false must short-circuit the save.
	out2 := filepath.Join(tmp, "noresume.bin")
	req.Resume = false
	saveWebDAVResume(req, 4096, 1000, "", "", false)
	if _, err := output.LoadResumeMetadata(out2); err != nil {
		t.Fatalf("LoadResumeMetadata (noresume): %v", err)
	}
}