package alert

import (
	"testing"
	"time"
)

func TestUnacknowledgeReturnsFiringAndClearsActor(t *testing.T) {
	at := time.Date(2026, 8, 2, 12, 0, 0, 0, time.UTC)
	result, err := Unacknowledge(Snapshot{State: StateAcknowledged, RetainedState: StateAcknowledged, AcknowledgedBy: "operator", AcknowledgedAt: &at, LastValue: 90}, "operator", at)
	if err != nil {
		t.Fatal(err)
	}
	if result.To != StateFiring || result.Snapshot.AcknowledgedBy != "" || result.Snapshot.AcknowledgedAt != nil || result.EventType != "unacknowledge" {
		t.Fatalf("unexpected unacknowledge result: %#v", result)
	}
}

func TestUnacknowledgeRejectsResolvedAndInactive(t *testing.T) {
	at := time.Now().UTC()
	for _, state := range []State{StateInactive, StatePending, StateFiring, StateResolved, StateUnknown} {
		if _, err := Unacknowledge(Snapshot{State: state}, "operator", at); err != ErrStateConflict {
			t.Fatalf("state %s error = %v", state, err)
		}
	}
}