package notify

import (
	"strings"
	"testing"
)

// R-1287: a D47 set-aside reaches the hub as backup_run_failures, leg `unit-set-aside`, severity error, Failed 1 —
// the payload controller 0.343.0 sends (cmd/controller/main.go SetUnitSetAsideNotify). Measured 2026-10-25 on Tester 1:
// two mails „🔴 tester-1: 1 of 1 apps failed to back up (backup run)" while nothing failed. The consequence asserted:
// the operator's mail says set aside / nothing failed, as a warning; a run with a real failure keeps its red subject.
// RED-PROOF: drop the setAsideApps branch in renderBackupRunFailures and the severity override in processEvent → the
// subject is the red „failed to back up" and the record reads error.
const setAsidePayload = `{"run_id":"unit-set-aside-tandoor-20261025T173155Z","run_kind":"backup","failed":1,"attempted":1,` +
	`"apps":[{"app":"tandoor","leg":"unit-set-aside","reason":"the backup of an earlier install was set aside whole (D47)"}]}`

func r1287Dispatch(t *testing.T, details string) (subjects []string, severity string) {
	t.Helper()
	st := opOnlyStore(t)
	d := opOnlyDispatcher(t, st, &sentTo{})
	d.sendEmailFn = func(to, subject, body string, headers map[string]string) error {
		if to == "operator@felhom.eu" {
			subjects = append(subjects, subject)
		}
		return nil
	}
	d.ProcessEvent("c1", "backup_run_failures", "error", `App "tandoor": its backup belonged to an earlier install`, details, "controller")
	logs, err := st.GetRecentNotifications("c1", 10)
	if err != nil {
		t.Fatal(err)
	}
	for _, l := range logs {
		if l.EventType == "backup_run_failures" {
			severity = l.Severity
		}
	}
	return subjects, severity
}

func TestR1287_ASetAsideMailsAsSetAsideNotAsAFailure(t *testing.T) {
	subjects, sev := r1287Dispatch(t, setAsidePayload)
	if len(subjects) != 1 {
		t.Fatalf("the operator got %d mail(s), want 1: %v", len(subjects), subjects)
	}
	s := subjects[0]
	if strings.Contains(s, "failed to back up") || strings.Contains(s, "🔴") {
		t.Fatalf("a set-aside is dressed as a red backup failure: %q", s)
	}
	if !strings.Contains(s, "set aside — nothing failed") || !strings.Contains(s, "tandoor") || !strings.Contains(s, "⚠️") {
		t.Fatalf("the subject must say set aside / nothing failed and name the app: %q", s)
	}
	if sev != "warning" {
		t.Fatalf("the record reads %q, want warning", sev)
	}
}

func TestR1287_ARunWithARealFailureKeepsItsRedSubject(t *testing.T) {
	mixed := `{"run_kind":"backup","failed":2,"attempted":5,"apps":[` +
		`{"app":"tandoor","leg":"unit-set-aside","reason":"set aside (D47)"},` +
		`{"app":"immich","leg":"recovery-unit","reason":"disk full"}]}`
	subjects, sev := r1287Dispatch(t, mixed)
	if len(subjects) != 1 || !strings.Contains(subjects[0], "2 of 5 apps failed to back up") || sev != "error" {
		t.Fatalf("a run with a real failure must stay red and error: %v %q", subjects, sev)
	}
}