// internal/ambient/sentinel_test.go
package ambient

import (
	"context"
	"testing"

	"keel/internal/evidence"
)

func snap(title, class string) evidence.WindowSnapshot {
	return evidence.WindowSnapshot{Title: title, Class: class, Health: evidence.EvidenceHealth{Available: true}}
}

func TestNewLineEmpty(t *testing.T) {
	s := New(Deps{}, 0, "notify")
	if s.Line() != "" {
		t.Fatalf("fresh sentinel line = %q, want empty", s.Line())
	}
}

func TestOnWindowRingDedupesAndCaps(t *testing.T) {
	s := New(Deps{}, 0, "notify")
	s.OnWindow(snap("a", "x"))
	s.OnWindow(snap("a", "x")) // consecutive dup ignored
	s.OnWindow(snap("b", "x"))
	if got := s.recentForTest(); len(got) != 2 || got[0] != "a" || got[1] != "b" {
		t.Fatalf("ring = %v, want [a b]", got)
	}
	for i := 0; i < recentTitlesMax+5; i++ {
		s.OnWindow(snap(string(rune('A'+i)), "x"))
	}
	if got := s.recentForTest(); len(got) != recentTitlesMax {
		t.Fatalf("ring len = %d, want %d", len(got), recentTitlesMax)
	}
}

func TestOnWindowSkipsEmptyTitle(t *testing.T) {
	s := New(Deps{}, 0, "notify")
	s.OnWindow(snap("", "x"))
	if got := s.recentForTest(); len(got) != 0 {
		t.Fatalf("empty title must not enter ring, got %v", got)
	}
}

var _ = context.Background