package kvm

import (
	"encoding/xml"
	"strings"
	"testing"
)

func TestVolumeNames(t *testing.T) {
	t.Parallel()
	if got := overlayVolumeName("proxy-x"); got != "proxy-x.qcow2" {
		t.Errorf("overlayVolumeName = %q", got)
	}
	if got := seedVolumeName("proxy-x"); got != "proxy-x-seed.iso" {
		t.Errorf("seedVolumeName = %q", got)
	}
}

func TestBuildVolumeXML_overlay(t *testing.T) {
	t.Parallel()
	raw, err := buildVolumeXML(overlayVolume("proxy-x", 10, "/var/lib/libvirt/images/base-debian-13.qcow2", "qcow2"))
	if err != nil {
		t.Fatalf("buildVolumeXML() error = %v", err)
	}
	var v volumeXML
	if err := xml.Unmarshal([]byte(raw), &v); err != nil {
		t.Fatalf("output is not well-formed XML: %v", err)
	}
	if v.Type != "file" || v.Name != "proxy-x.qcow2" {
		t.Errorf("type/name = %s/%s", v.Type, v.Name)
	}
	if v.Capacity.Unit != "bytes" || v.Capacity.Value != 10*bytesPerGiB {
		t.Errorf("capacity = %d %s, want %d bytes", v.Capacity.Value, v.Capacity.Unit, 10*bytesPerGiB)
	}
	if v.Target.Format.Type != "qcow2" {
		t.Errorf("format = %q", v.Target.Format.Type)
	}
	if v.BackingStore == nil {
		t.Fatalf("backingStore missing:\n%s", raw)
	}
	if v.BackingStore.Path != "/var/lib/libvirt/images/base-debian-13.qcow2" || v.BackingStore.Format.Type != "qcow2" {
		t.Errorf("backingStore = %+v", v.BackingStore)
	}
}

func TestBuildVolumeXML_rawHasNoBackingStore(t *testing.T) {
	t.Parallel()
	raw, err := buildVolumeXML(rawVolume("proxy-x-seed.iso", 372736))
	if err != nil {
		t.Fatalf("buildVolumeXML() error = %v", err)
	}
	if strings.Contains(raw, "backingStore") {
		t.Errorf("raw volume must not declare a backing store:\n%s", raw)
	}
	var v volumeXML
	if err := xml.Unmarshal([]byte(raw), &v); err != nil {
		t.Fatalf("output is not well-formed XML: %v", err)
	}
	if v.Name != "proxy-x-seed.iso" || v.Capacity.Value != 372736 || v.Target.Format.Type != "raw" {
		t.Errorf("volume = %+v", v)
	}
}