package controller

import (
	"context"
	"strings"
	"testing"

	bindv1alpha1 "git.unkin.net/unkin/bind-operator/api/v1alpha1"
)

// A primary zone with known secondaries renders notify explicit + also-notify
// so a dynamic update NOTIFYs the secondaries immediately.
func TestBuildZoneConfigPrimaryAlsoNotify(t *testing.T) {
	r := &BindZoneReconciler{}
	zone := &bindv1alpha1.BindZone{
		Spec: bindv1alpha1.BindZoneSpec{
			ZoneName: "main.unkin.net",
			Type:     bindv1alpha1.ZonePrimary,
		},
	}

	cfg, err := r.buildZoneConfig(context.Background(), zone, "transfer-key", []string{"10.42.2.6", "10.42.1.5"}, "externaldns-key")
	if err != nil {
		t.Fatalf("buildZoneConfig: %v", err)
	}
	if !strings.Contains(cfg, "notify explicit") {
		t.Errorf("expected notify explicit in %q", cfg)
	}
	// also-notify entries are keyed so secondaries can admit the NOTIFY by TSIG
	// key (allow-notify { key ... }) instead of by (churning) pod IP.
	if !strings.Contains(cfg, `also-notify { 10.42.2.6 key "externaldns-key"; 10.42.1.5 key "externaldns-key"; }`) {
		t.Errorf("expected keyed also-notify with the secondary IPs in %q", cfg)
	}
}

// also-notify entries carry no key when none is configured (unkeyed NOTIFY).
func TestBuildZoneConfigPrimaryAlsoNotifyUnkeyed(t *testing.T) {
	r := &BindZoneReconciler{}
	zone := &bindv1alpha1.BindZone{
		Spec: bindv1alpha1.BindZoneSpec{ZoneName: "main.unkin.net", Type: bindv1alpha1.ZonePrimary},
	}
	cfg, err := r.buildZoneConfig(context.Background(), zone, "transfer-key", []string{"10.42.2.6"}, "")
	if err != nil {
		t.Fatalf("buildZoneConfig: %v", err)
	}
	if !strings.Contains(cfg, "also-notify { 10.42.2.6; }") {
		t.Errorf("expected unkeyed also-notify in %q", cfg)
	}
}

// With no secondaries, no also-notify is emitted (single-replica cluster).
func TestBuildZoneConfigPrimaryNoNotifyTargets(t *testing.T) {
	r := &BindZoneReconciler{}
	zone := &bindv1alpha1.BindZone{
		Spec: bindv1alpha1.BindZoneSpec{ZoneName: "main.unkin.net", Type: bindv1alpha1.ZonePrimary},
	}

	cfg, err := r.buildZoneConfig(context.Background(), zone, "transfer-key", nil, "externaldns-key")
	if err != nil {
		t.Fatalf("buildZoneConfig: %v", err)
	}
	if strings.Contains(cfg, "also-notify") || strings.Contains(cfg, "notify explicit") {
		t.Errorf("did not expect notify clauses with no targets: %q", cfg)
	}
}