package memory

import "testing"

func TestRecallAllowed(t *testing.T) {
	cases := []struct {
		name        string
		query, text string
		want        bool
	}{
		// The #470 shape: a world question and a note about his box.
		{"world question, unrelated note", "почему небо синее", "сеть какая-то медленная", false},
		{"world question, unrelated fact", "какая столица Франции", "какая последняя версия языка Go", false},
		{"silent fixture case", "во сколько отходит поезд", "бэкап запускается в три ночи", false},

		// A world question that does name the topic keeps its answer.
		{"world question, same topic", "какой поезд идёт в Минск", "поезда в Минск ходят утром", true},

		// A question about his own life is judged by the embedder alone,
		// because recall exists for words he no longer remembers.
		{"about him, no shared word", "во сколько я обычно засыпаю", "ложусь около одиннадцати", true},
		{"about him, english", "which colour scheme do i like", "тёмная тема везде", true},

		// Inflection must not break a match.
		{"inflected", "чем кормить кота", "корм для кота в шкафу", true},
	}
	for _, c := range cases {
		if got := RecallAllowed(c.query, c.text); got != c.want {
			t.Errorf("%s: RecallAllowed(%q, %q) = %v, want %v", c.name, c.query, c.text, got, c.want)
		}
	}
}

// The known cost of the veto and the thing that pays for it, both measured on
// the held-out fixture with the real embedder (#496,
// docs/evals/2026-08-03-recall-topic-veto.md). The two are one lexical class:
// zero shared content words, no first-person marker, scores 0.826 against 0.835
// and margins 0.023 against 0.019. Recovering the first re-admits the second,
// which puts false recall back to 1/5. Anyone loosening the veto has to move
// the first line without moving the second.
func TestRecallVetoTradeIsPinned(t *testing.T) {
	if RecallAllowed("what fixed the screen problem", "the flicker went away once i swapped the display cable") {
		t.Error("en-hard-024 is expected to stay vetoed — if this passes now, re-measure false recall before celebrating")
	}
	if RecallAllowed("во сколько отходит поезд", "погулял вдоль реки") {
		t.Error("ru-silent-029 must stay vetoed — this is the false recall the veto exists to stop")
	}
}

// A question made only of filler has no topic word to match on, and the score
// gate is then the only judge it can have.
func TestRecallAllowedFallsBackWhenNothingToCompare(t *testing.T) {
	if !RecallAllowed("что это", "сеть какая-то медленная") {
		t.Error("a question with no content word must not be vetoed")
	}
}
