feat(alert): add Opsgenie provider

Support Opsgenie Alert API v2 with US/EU endpoint selection,
configurable priority (P1-P5), and GenieKey auth. TUI form
includes API key, priority picker, and EU instance toggle.

internal/alert/alert.go

@@ -110,6 +110,24 @@ func gotifyPayload(priority string) PayloadFunc {
 	}
 }
 
+func opsgeniePayload(priority string) PayloadFunc {
+	return func(title, message string) ([]byte, error) {
+		return json.Marshal(map[string]any{
+			"message":     limitMessage(title, 130),
+			"description": message,
+			"source":      "uptop",
+			"priority":    priority,
+		})
+	}
+}
+
+func limitMessage(s string, max int) string {
+	if len(s) <= max {
+		return s
+	}
+	return s[:max]
+}
+
 func GetProvider(cfg models.AlertConfig) Provider {
 	switch cfg.Type {
 	case "discord":
@@ -173,6 +191,20 @@ func GetProvider(cfg models.AlertConfig) Provider {
 			Payload: gotifyPayload(priority),
 			Headers: map[string]string{"X-Gotify-Key": cfg.Settings["token"]},
 		}
+	case "opsgenie":
+		priority := "P3"
+		if p, ok := cfg.Settings["priority"]; ok && p != "" {
+			priority = p
+		}
+		apiURL := "https://api.opsgenie.com/v2/alerts"
+		if eu, ok := cfg.Settings["eu"]; ok && eu == "true" {
+			apiURL = "https://api.eu.opsgenie.com/v2/alerts"
+		}
+		return &HTTPProvider{
+			URL:     apiURL,
+			Payload: opsgeniePayload(priority),
+			Headers: map[string]string{"Authorization": "GenieKey " + cfg.Settings["api_key"]},
+		}
 	default:
 		return nil
 	}

internal/alert/alert_test.go

@@ -196,8 +196,76 @@ func TestHTTPProviderGotify(t *testing.T) {
 	}
 }
 
+func TestHTTPProviderOpsgenie(t *testing.T) {
+	var received map[string]any
+	var authHeader string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		authHeader = r.Header.Get("Authorization")
+		json.NewDecoder(r.Body).Decode(&received)
+		w.WriteHeader(202)
+	}))
+	defer srv.Close()
+
+	p := GetProvider(models.AlertConfig{Type: "opsgenie", Settings: map[string]string{
+		"api_key":  "test-genie-key",
+		"priority": "P1",
+	}})
+	hp := p.(*HTTPProvider)
+	hp.URL = srv.URL
+
+	if err := p.Send(context.Background(), "Site Down", "mysite.com is unreachable"); err != nil {
+		t.Fatalf("Send: %v", err)
+	}
+	if authHeader != "GenieKey test-genie-key" {
+		t.Errorf("expected auth 'GenieKey test-genie-key', got '%s'", authHeader)
+	}
+	if received["message"] != "Site Down" {
+		t.Errorf("unexpected message: %v", received["message"])
+	}
+	if received["description"] != "mysite.com is unreachable" {
+		t.Errorf("unexpected description: %v", received["description"])
+	}
+	if received["source"] != "uptop" {
+		t.Errorf("expected source 'uptop', got '%v'", received["source"])
+	}
+	if received["priority"] != "P1" {
+		t.Errorf("expected priority 'P1', got '%v'", received["priority"])
+	}
+}
+
+func TestOpsgenieEUEndpoint(t *testing.T) {
+	p := GetProvider(models.AlertConfig{Type: "opsgenie", Settings: map[string]string{
+		"api_key": "key", "eu": "true",
+	}})
+	hp := p.(*HTTPProvider)
+	if hp.URL != "https://api.eu.opsgenie.com/v2/alerts" {
+		t.Errorf("expected EU URL, got '%s'", hp.URL)
+	}
+}
+
+func TestOpsgenieUSEndpoint(t *testing.T) {
+	p := GetProvider(models.AlertConfig{Type: "opsgenie", Settings: map[string]string{
+		"api_key": "key",
+	}})
+	hp := p.(*HTTPProvider)
+	if hp.URL != "https://api.opsgenie.com/v2/alerts" {
+		t.Errorf("expected US URL, got '%s'", hp.URL)
+	}
+}
+
+func TestLimitMessage(t *testing.T) {
+	short := "short"
+	if got := limitMessage(short, 130); got != short {
+		t.Errorf("expected '%s', got '%s'", short, got)
+	}
+	long := string(make([]byte, 200))
+	if got := limitMessage(long, 130); len(got) != 130 {
+		t.Errorf("expected length 130, got %d", len(got))
+	}
+}
+
 func TestGetProviderNewTypes(t *testing.T) {
-	for _, typ := range []string{"telegram", "pagerduty", "pushover", "gotify"} {
+	for _, typ := range []string{"telegram", "pagerduty", "pushover", "gotify", "opsgenie"} {
 		p := GetProvider(models.AlertConfig{Type: typ, Settings: map[string]string{
 			"token": "x", "chat_id": "1", "routing_key": "k", "user": "u", "url": "http://localhost",
 		}})

internal/tui/tab_alerts.go

@@ -39,6 +39,10 @@ type alertFormData struct {
 	GotifyURL      string
 	GotifyToken    string
 	GotifyPriority string
+	// Opsgenie
+	OpsgenieAPIKey   string
+	OpsgeniePriority string
+	OpsgenieEU       bool
 }
 
 func fmtAlertType(t string) string {
@@ -61,6 +65,8 @@ func fmtAlertType(t string) string {
 		return lipgloss.NewStyle().Foreground(lipgloss.Color("#249DF1")).Render(t)
 	case "gotify":
 		return lipgloss.NewStyle().Foreground(lipgloss.Color("#3F8BBA")).Render(t)
+	case "opsgenie":
+		return lipgloss.NewStyle().Foreground(lipgloss.Color("#2684FF")).Render(t)
 	default:
 		return t
 	}
@@ -108,6 +114,19 @@ func fmtAlertConfig(alert struct {
 			return limitStr(url, 34)
 		}
 		return subtleStyle.Render("—")
+	case "opsgenie":
+		key := alert.Settings["api_key"]
+		if key != "" {
+			masked := key
+			if len(masked) > 8 {
+				masked = masked[:4] + "…" + masked[len(masked)-4:]
+			}
+			if alert.Settings["eu"] == "true" {
+				return limitStr(fmt.Sprintf("EU %s", masked), 34)
+			}
+			return limitStr(masked, 34)
+		}
+		return subtleStyle.Render("—")
 	default:
 		if val, ok := alert.Settings["url"]; ok {
 			return limitStr(val, 34)
@@ -238,6 +257,7 @@ func (m *Model) initAlertHuhForm() tea.Cmd {
 		NtfyPri:           "3",
 		PagerDutySeverity: "critical",
 		GotifyPriority:    "5",
+		OpsgeniePriority:  "P3",
 	}
 
 	if m.editID > 0 {
@@ -275,6 +295,10 @@ func (m *Model) initAlertHuhForm() tea.Cmd {
 					m.alertFormData.GotifyURL = alert.Settings["url"]
 					m.alertFormData.GotifyToken = alert.Settings["token"]
 					m.alertFormData.GotifyPriority = alert.Settings["priority"]
+				case "opsgenie":
+					m.alertFormData.OpsgenieAPIKey = alert.Settings["api_key"]
+					m.alertFormData.OpsgeniePriority = alert.Settings["priority"]
+					m.alertFormData.OpsgenieEU = alert.Settings["eu"] == "true"
 				}
 				break
 			}
@@ -303,6 +327,7 @@ func (m *Model) initAlertHuhForm() tea.Cmd {
 					huh.NewOption("PagerDuty", "pagerduty"),
 					huh.NewOption("Pushover", "pushover"),
 					huh.NewOption("Gotify", "gotify"),
+					huh.NewOption("Opsgenie", "opsgenie"),
 				).Value(&m.alertFormData.AlertType),
 		).Title("Alert Config"),
 		huh.NewGroup(
@@ -410,6 +435,23 @@ func (m *Model) initAlertHuhForm() tea.Cmd {
 		).Title("Gotify Settings").WithHideFunc(func() bool {
 			return m.alertFormData.AlertType != "gotify"
 		}),
+		huh.NewGroup(
+			huh.NewInput().Title("API Key").
+				Placeholder("your-opsgenie-api-key").
+				Value(&m.alertFormData.OpsgenieAPIKey),
+			huh.NewSelect[string]().Title("Priority").
+				Options(
+					huh.NewOption("Critical (P1)", "P1"),
+					huh.NewOption("High (P2)", "P2"),
+					huh.NewOption("Moderate (P3)", "P3"),
+					huh.NewOption("Low (P4)", "P4"),
+					huh.NewOption("Informational (P5)", "P5"),
+				).Value(&m.alertFormData.OpsgeniePriority),
+			huh.NewConfirm().Title("EU Instance?").
+				Value(&m.alertFormData.OpsgenieEU),
+		).Title("Opsgenie Settings").WithHideFunc(func() bool {
+			return m.alertFormData.AlertType != "opsgenie"
+		}),
 	).WithTheme(m.theme.HuhTheme())
 
 	return m.huhForm.Init()
@@ -446,6 +488,12 @@ func (m *Model) submitAlertForm() {
 		settings["url"] = d.GotifyURL
 		settings["token"] = d.GotifyToken
 		settings["priority"] = d.GotifyPriority
+	case "opsgenie":
+		settings["api_key"] = d.OpsgenieAPIKey
+		settings["priority"] = d.OpsgeniePriority
+		if d.OpsgenieEU {
+			settings["eu"] = "true"
+		}
 	default:
 		settings["url"] = d.WebhookURL
 	}