package birdfmt

import (
	_ "embed"
	"strings"
	"testing"
)

//go:embed testdata/golden/main_bird_skeleton.golden
var goldenMainBirdSkeleton string

func TestRenderMainBirdConf_Golden(t *testing.T) {
	got, err := RenderMainBirdConf(MainBirdConfOptions{
		RouterID: "192.0.2.1",
		Includes: StandardIncludeFragments(),
	})
	if err != nil {
		t.Fatal(err)
	}
	want := strings.TrimSuffix(goldenMainBirdSkeleton, "\n")
	got = strings.TrimSuffix(got, "\n")
	if got != want {
		t.Fatalf("golden mismatch\n--- got ---\n%s\n--- want ---\n%s", got, want)
	}
}

func TestRenderMainBirdConf_Preamble(t *testing.T) {
	got, err := RenderMainBirdConf(MainBirdConfOptions{
		RouterID: "192.0.2.1",
		Includes: nil,
		Preamble: "operator note\n# already commented",
	})
	if err != nil {
		t.Fatal(err)
	}
	if !strings.HasPrefix(got, "# operator note\n") {
		t.Fatalf("expected preamble prefix, got:\n%s", got)
	}
	if !strings.Contains(got, "# already commented") {
		t.Fatal(got)
	}
}

func TestRenderMainBirdConf_Errors(t *testing.T) {
	_, err := RenderMainBirdConf(MainBirdConfOptions{})
	if err == nil {
		t.Fatal("expected error for empty router id")
	}
}

func TestFragmentIncludePath(t *testing.T) {
	if p := FragmentIncludePath(FragmentPrefixesV4); p != "bird.d/evobgp_prefixes_v4.conf" {
		t.Fatal(p)
	}
}