package main

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"git.cin.su/m/Assistant/contracts/capability"
	"git.cin.su/m/Assistant/contracts/epistemics"
	"git.cin.su/m/Assistant/contracts/interaction"
	"git.cin.su/m/Assistant/contracts/work"
	interactiondomain "git.cin.su/m/Assistant/modules/interaction/domain"
)

func TestHumanResearchExcerptRemovesSearchResultHeading(t *testing.T) {
	got := humanResearchExcerpt("погода в Санкт-Петербурге", "Погода в Санкт-Петербурге — Прогноз погоды — Сейчас пасмурно, температура +14°")
	if got != "Сейчас пасмурно, температура +14°" || strings.Contains(got, "Прогноз погоды") {
		t.Fatalf("human research excerpt = %q", got)
	}
}

func TestNearestFlightEvidenceDoesNotClaimMissingDepartureTime(t *testing.T) {
	if !nearestFlightQuery("ближайший рейс Москва Казань сегодня") {
		t.Fatal("nearest flight query was not recognized")
	}
	if containsFlightTimeEvidence("Казань составляет 1 ч 25 мин. График вылетов доступен онлайн") {
		t.Fatal("duration was mistaken for a departure time")
	}
	if !containsFlightTimeEvidence("Ближайший вылет в 18:40") {
		t.Fatal("departure time was not recognized")
	}
}

func TestNearestFlightReplyFiltersUnrelatedSearchSnippets(t *testing.T) {
	result := epistemics.ResearchResult{Findings: []epistemics.ResearchFinding{
		{State: epistemics.FindingSupported, Source: epistemics.Source{Locator: "https://naidy.example", Title: "Мебельная фурнитура"}, Excerpt: epistemics.SourceExcerpt{Text: "Комплектующие для мебели оптом и в розницу."}},
		{State: epistemics.FindingSupported, Source: epistemics.Source{Locator: "https://rasp.example", Title: "Рейсы Москва — Казань"}, Excerpt: epistemics.SourceExcerpt{Text: "Расписание самолётов Москва — Казань, время вылета и прилёта."}},
	}}
	reply, backed := renderResearchReply("ближайшие авиарейсы Москва Казань сегодня", result, nil)
	if !backed || !strings.Contains(reply, "Рейсы Москва") || strings.Contains(reply, "Мебельная") {
		t.Fatalf("unrelated source leaked into flight reply: %q", reply)
	}
}

func TestNearestFlightReplyDoesNotAppendWeakerSecondMatch(t *testing.T) {
	result := epistemics.ResearchResult{Findings: []epistemics.ResearchFinding{
		{State: epistemics.FindingSupported, Source: epistemics.Source{Locator: "https://schedule.example", Title: "Рейсы Москва — Казань"}, Excerpt: epistemics.SourceExcerpt{Text: "Расписание авиарейсов Москва — Казань, время вылета и прилёта."}},
		{State: epistemics.FindingSupported, Source: epistemics.Source{Locator: "https://category.example", Title: "Категория направлений"}, Excerpt: epistemics.SourceExcerpt{Text: "Список близлежащих городов и ориентировочные цены."}},
	}}
	reply, backed := renderResearchReply("ближайшие авиарейсы Москва Казань сегодня", result, nil)
	if !backed || !strings.Contains(reply, "Рейсы Москва") || strings.Contains(reply, "Категория направлений") {
		t.Fatalf("weaker second finding leaked into nearest-flight reply: %q", reply)
	}
}

func TestNearestFlightEvidenceRequiresBothRouteEndpointsWhenKnown(t *testing.T) {
	query := "ближайшие авиарейсы Москва Казань сегодня"
	matched := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Рейсы Москва — Казань"}, Excerpt: epistemics.SourceExcerpt{Text: "Расписание авиарейсов из Москвы в Казань."}}
	if !researchFindingMatchesIntent(query, matched) {
		t.Fatal("route evidence with both endpoints was rejected")
	}
	unrelated := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Рейсы Москва — Казань", Locator: "https://example.test/moscow-kazan"}, Excerpt: epistemics.SourceExcerpt{Text: "Рейсы Москва — Казань — Ближайшие к Казани города; цена указана ориентировочно."}}
	if researchFindingMatchesIntent(query, unrelated) {
		t.Fatal("one-ended travel evidence was accepted")
	}
}

func TestTicketReplyRejectsGenericCategoryPageWithoutDestination(t *testing.T) {
	query := "найди билеты до Ялты сегодня"
	generic := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Купить билеты", Locator: "https://tickets.example"}, Excerpt: epistemics.SourceExcerpt{Text: "Поиск авиабилетов среди множества направлений."}}
	if researchFindingMatchesIntent(query, generic) {
		t.Fatal("generic ticket category was presented as destination result")
	}
	relevant := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Билеты"}, Excerpt: epistemics.SourceExcerpt{Text: "Билеты до Ялты: варианты на сегодня."}}
	if !researchFindingMatchesIntent(query, relevant) {
		t.Fatal("destination-specific ticket result was rejected")
	}
}

func TestDistanceReplyRejectsCalculatorPageWithoutDistance(t *testing.T) {
	query := "расстояние между Москве и Сочи в километрах по прямой и по дороге"
	calculator := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Расчет расстояний"}, Excerpt: epistemics.SourceExcerpt{Text: "Калькулятор рассчитывает точное расстояние между городами."}}
	if researchFindingMatchesIntent(query, calculator) {
		t.Fatal("distance calculator landing page was presented without a measured distance")
	}
	measured := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Маршрут"}, Excerpt: epistemics.SourceExcerpt{Text: "Расстояние по дороге составляет 1 620 км."}}
	if !researchFindingMatchesIntent(query, measured) {
		t.Fatal("measured distance evidence was rejected")
	}
}

func TestResearchReplyRejectsGenericLandingPageForConcreteIdentifier(t *testing.T) {
	result := epistemics.ResearchResult{Findings: []epistemics.ResearchFinding{{
		State:   epistemics.FindingSupported,
		Source:  epistemics.Source{Locator: "https://market.example", Title: "Интернет-магазин"},
		Excerpt: epistemics.SourceExcerpt{Text: "Широкий ассортимент товаров и услуг."},
	}}}
	reply, backed := renderResearchReply("на WB бренд marka-wear", result, nil)
	if backed || !strings.Contains(reply, "marka-wear") || strings.Contains(reply, "wildberries") || !strings.Contains(reply, "уточните написание") {
		t.Fatalf("generic page was presented as a brand result: %q", reply)
	}
}

func TestLocalPlaceReplyRejectsDictionaryFinding(t *testing.T) {
	result := epistemics.ResearchResult{Findings: []epistemics.ResearchFinding{{
		State:   epistemics.FindingSupported,
		Source:  epistemics.Source{Locator: "https://dictionary.example", Title: "Ближайший — словарь"},
		Excerpt: epistemics.SourceExcerpt{Text: "Ближайший — значение слова и пример употребления."},
	}}}
	reply, backed := renderResearchReply("места ресторан в Сочи адрес отзывы меню", result, nil)
	if backed || !strings.Contains(reply, "Проверяемых данных") {
		t.Fatalf("dictionary finding was presented as local place result: %q", reply)
	}
}

func TestResearchReplyKeepsFindingContainingConcreteIdentifier(t *testing.T) {
	result := epistemics.ResearchResult{Findings: []epistemics.ResearchFinding{{
		State:   epistemics.FindingSupported,
		Source:  epistemics.Source{Locator: "https://market.example/marka-wear", Title: "Marka-wear"},
		Excerpt: epistemics.SourceExcerpt{Text: "Бренд marka-wear: товары и карточки."},
	}}}
	reply, backed := renderResearchReply("на WB бренд marka-wear", result, nil)
	if !backed || !strings.Contains(strings.ToLower(reply), "marka-wear") {
		t.Fatalf("concrete identifier finding was rejected: %q", reply)
	}
}

func TestResearchIdentifiersExcludeSearchDate(t *testing.T) {
	identifiers := requestedResearchIdentifiers("ближайший поезд в Петербург сегодня 26.08.2026")
	if len(identifiers) != 0 {
		t.Fatalf("search date was treated as a concrete identifier: %#v", identifiers)
	}
}

func TestResearchQueryKeepsDistanceRelationBeforeSearchNormalization(t *testing.T) {
	history := []interaction.HumanUtterance{{Content: "я сейчас в Москве"}}
	query := interactiondomain.TravelResearchQuery("сколько километров до Сочи?", history, time.Time{})
	query = interactiondomain.SearchQueryWithLexicon(query, interactiondomain.TaskLexicon{})
	if query != "расстояние между Москве и Сочи в километрах по прямой и по дороге" {
		t.Fatalf("distance query lost remembered origin: %q", query)
	}
}

func TestResponseReviewPreservesAttemptedResearchOutcome(t *testing.T) {
	if reviewMayReplacePlanningReply(false, false, true, false, "Уточните аэропорт.", "Пока не смог получить проверяемый ответ.") {
		t.Fatal("review replaced an honest unbacked research outcome")
	}
	if !reviewMayReplacePlanningReply(false, false, true, true, "Расписание. Источник: https://example.test", "Расписание. Источник: https://example.test") {
		t.Fatal("review should be able to improve a source-backed research outcome")
	}
	if reviewMayReplacePlanningReply(false, false, true, true, "Расписание без ссылки", "Расписание. Источник: https://example.test") {
		t.Fatal("review dropped the research evidence")
	}
	if !reviewMayReplacePlanningReply(false, false, false, false, "Нормальный ответ", "Черновик") {
		t.Fatal("ordinary conversation review was unexpectedly blocked")
	}
	if !reviewMayReplacePlanningReply(true, true, false, false, "Санкт-Петербург — город в России.", "Меня зовут Домовой. Санкт-Петербург — город в России.") {
		t.Fatal("stable-knowledge draft must be eligible for semantic quality review")
	}
	// The caller must not mark a source-backed research result as immutable
	// semantic state: it may be rewritten, but only with its evidence retained.
	if !reviewMayReplacePlanningReply(false, false, true, true, "Из Москвы в Сочи можно добраться самолётом или поездом. Источник: https://example.test", "Сырые результаты. Источник: https://example.test") {
		t.Fatal("source-backed research draft must be eligible for human-facing review")
	}
}

func TestNonMutatingTextDirectiveCanUseCognitiveReply(t *testing.T) {
	semantic := interactiondomain.SemanticResult{Interpretation: interaction.UtteranceInterpretation{SpeechAct: interaction.SpeechActDirective}}
	if !shouldGenerateNonMutatingTextDirective(semantic, nil, work.HelpPath{}, false) {
		t.Fatal("ordinary formatting directive was not eligible for a cognitive reply")
	}
	if !shouldGenerateNonMutatingTextDirective(semantic, nil, work.HelpPath{Kind: work.HelpPathCognition}, false) {
		t.Fatal("reply-only cognition path was incorrectly rejected")
	}
	if shouldGenerateNonMutatingTextDirective(semantic, nil, work.HelpPath{Kind: work.HelpPathDirectCapability}, false) {
		t.Fatal("direct capability was incorrectly replaced by a textual reply")
	}
	if shouldGenerateNonMutatingTextDirective(semantic, []chatRoute{{Kind: chatRouteMedia}}, work.HelpPath{}, false) {
		t.Fatal("media route was incorrectly replaced by a textual reply")
	}
	if shouldGenerateNonMutatingTextDirective(semantic, nil, work.HelpPath{NeedsDurableWork: true}, false) {
		t.Fatal("durable work was incorrectly replaced by a textual reply")
	}
}

func TestBearerTokenRequiresBearerScheme(t *testing.T) {
	request := httptest.NewRequest("GET", "/", nil)
	request.Header.Set("Authorization", "Basic value")
	if token := bearerToken(request); token != "" {
		t.Fatalf("unexpected token %q", token)
	}
	request.Header.Set("Authorization", "Bearer creator-session")
	if token := bearerToken(request); token != "creator-session" {
		t.Fatalf("token = %q", token)
	}
}

func TestLatestAssistantNameUsesNewestDurablePreference(t *testing.T) {
	history := []interaction.HumanUtterance{
		{Content: "я назову тебя Дед", ReceivedAtUnixMillis: 20},
		{Content: "теперь тебя зовут Фея", ReceivedAtUnixMillis: 30},
	}
	if got := latestAssistantName(history); got != "Фея" {
		t.Fatalf("latest assistant name = %q", got)
	}
}

func TestHumanMemoryInventoryUsesNewestPreference(t *testing.T) {
	history := []interaction.HumanUtterance{
		{Content: "мне нравится синий цвет", ReceivedAtUnixMillis: 20},
		{Content: "мне нравится красный цвет", ReceivedAtUnixMillis: 30},
	}
	got := humanMemoryInventory(history, "Фея")
	if !strings.Contains(got, "красный") || strings.Contains(got, "синий") {
		t.Fatalf("memory inventory did not select newest preference: %q", got)
	}
}

func TestContainsScheduleTimeEvidence(t *testing.T) {
	if containsScheduleTimeEvidence("расписание поездов и цена билета") {
		t.Fatal("a price or schedule label is not a departure time")
	}
	if !containsScheduleTimeEvidence("Отправление в 07:45") {
		t.Fatal("expected an explicit departure time to be recognized")
	}
}

func TestInternetStatusQueryRecognizesConnectionChecks(t *testing.T) {
	for _, query := range []string{"проверь, работает ли интернет", "есть доступ к сети?"} {
		if !isInternetStatusQuery(query) {
			t.Fatalf("connection check was not recognized: %q", query)
		}
	}
	if isInternetStatusQuery("найди интернет-магазин") {
		t.Fatal("ordinary search must not be treated as a connectivity check")
	}
}

func TestInternetStatusReplyDoesNotLeakIncidentalSearchResults(t *testing.T) {
	result := epistemics.ResearchResult{Findings: []epistemics.ResearchFinding{{
		State:   epistemics.FindingSupported,
		Source:  epistemics.Source{Locator: "https://example.test", Title: "Incidental page"},
		Excerpt: epistemics.SourceExcerpt{Text: "A response was received."},
	}}}
	reply, backed := renderResearchReply("проверь, работает ли интернет", result, nil)
	if !backed || reply != "Интернет работает: Домовой получил ответ от внешнего источника." {
		t.Fatalf("unexpected internet status reply: %q", reply)
	}
}

func TestCognitiveChannelQuestionUsesHumanSafeHealthReply(t *testing.T) {
	reply := humanCognitiveChannelReply(interaction.InformationRequestCognitiveChannelStatus, interaction.SpeechActQuestion, capability.Health{State: capability.HealthAvailable, CapabilityID: "provider-secret-model"}, nil)
	if !strings.Contains(reply, "доступен") || strings.Contains(reply, "provider-secret-model") {
		t.Fatalf("unexpected safe reply: %q", reply)
	}
}

func TestCurrentModelReplyDoesNotInventProvider(t *testing.T) {
	reply := humanCurrentCognitiveModelReply(capability.Health{State: capability.HealthDegraded, CapabilityID: "provider-secret-model"}, nil)
	if !strings.Contains(reply, "встроенным режимом") || !strings.Contains(reply, "ограничениями") || strings.Contains(reply, "provider-secret-model") {
		t.Fatalf("unexpected current-model reply: %q", reply)
	}
}

func TestCognitiveConfigurationRequestDoesNotPretendToMutate(t *testing.T) {
	reply := humanCognitiveChannelReply(interaction.InformationRequestCognitiveRecovery, interaction.SpeechActDirective, capability.Health{State: capability.HealthUnavailable}, nil)
	if reply != "Канал мышления недоступен. Домовой остаётся на связи." {
		t.Fatalf("unexpected configuration reply: %q", reply)
	}
}

func TestCognitiveDegradedReplyKeepsDomovoyAlive(t *testing.T) {
	reply := humanCognitiveDegradedReply("Помоги настроить локальную модель")
	if strings.Contains(reply, "когнитивный канал") || strings.Contains(reply, "Повторю") || !strings.Contains(reply, "не выдумываю") {
		t.Fatalf("unexpected degraded reply: %q", reply)
	}
}

func TestModelInventoryQuestionUsesReadOnlyFastPath(t *testing.T) {
	for _, message := range []string{"какие модели доступны?", "напиши список настроек ИИ", "какие есть подключения ИИ"} {
		result, err := interactiondomain.InterpretUtterance(interaction.HumanUtterance{Content: message}, nil, nil, time.Now())
		if err != nil {
			t.Fatalf("interpretation failed for %q: %v", message, err)
		}
		if result.InformationRequestKind != interaction.InformationRequestCognitiveModelInventory {
			t.Fatalf("semantic inventory request %q was not recognized: kind=%q act=%q hints=%v", message, result.InformationRequestKind, result.Interpretation.SpeechAct, result.CapabilityHints)
		}
	}
	ordinary, err := interactiondomain.InterpretUtterance(interaction.HumanUtterance{Content: "настрой локальную модель"}, nil, nil, time.Now())
	if err != nil {
		t.Fatal(err)
	}
	if ordinary.InformationRequestKind == interaction.InformationRequestCognitiveModelInventory {
		t.Fatal("configuration mutation must not use read-only model inventory path")
	}
}

func TestHumanCognitiveModelInventoryDoesNotExposeSecrets(t *testing.T) {
	cost := int64(25)
	text := humanCognitiveModelInventory([]capability.ResolvedCognitiveBinding{{
		Binding:  capability.CognitiveBinding{DataPolicy: capability.DataPolicyExternalMessageOnly, Activation: capability.ActivationActive},
		Provider: capability.ProviderInstance{Kind: "openai-compatible-chat-v1", CredentialRef: "secret-ref", AuthMode: capability.AuthKey, BillingMode: capability.BillingPerRequest, RequestCostMicros: &cost, Health: capability.HealthAvailable},
		Model:    capability.ModelDescriptor{ProviderModelID: "example-model", Health: capability.HealthAvailable},
	}}, nil)
	if strings.Contains(text, "secret-ref") || strings.Contains(text, "25") || !strings.Contains(text, "example-model") || !strings.Contains(text, "активна") {
		t.Fatalf("unsafe or incomplete inventory: %q", text)
	}
}

func TestHumanCognitiveModelInventoryDeduplicatesAndPrioritizesAvailable(t *testing.T) {
	text := humanCognitiveModelInventory([]capability.ResolvedCognitiveBinding{
		{Binding: capability.CognitiveBinding{Activation: capability.ActivationInactive}, Provider: capability.ProviderInstance{Health: capability.HealthUnavailable}, Model: capability.ModelDescriptor{ProviderModelID: "same-model", Health: capability.HealthUnavailable}},
		{Binding: capability.CognitiveBinding{Activation: capability.ActivationActive}, Provider: capability.ProviderInstance{Health: capability.HealthAvailable}, Model: capability.ModelDescriptor{ProviderModelID: "same-model", Health: capability.HealthAvailable}},
	}, nil)
	if strings.Count(text, "same-model") != 1 || !strings.Contains(text, "same-model — активна") {
		t.Fatalf("expected one active model entry, got %q", text)
	}
}

func TestCreatorSessionHandlerAcceptsConfiguredCredentials(t *testing.T) {
	handler := creatorSessionHandler("recovery", "m", "password", []byte("01234567890123456789012345678901"), func() time.Time { return time.Unix(1000, 0) })
	request := httptest.NewRequest(http.MethodPost, "/v1/creator/sessions", strings.NewReader(`{"username":"m","password":"password"}`))
	response := httptest.NewRecorder()
	handler(response, request)
	if response.Code != http.StatusOK {
		t.Fatalf("status = %d body=%s", response.Code, response.Body.String())
	}
	var issued struct {
		Token string
	}
	if err := json.NewDecoder(response.Body).Decode(&issued); err != nil || issued.Token == "" {
		t.Fatalf("session response = %+v, err=%v", issued, err)
	}
}

func TestCreatorSessionHandlerFailsClosed(t *testing.T) {
	handler := creatorSessionHandler("recovery", "m", "password", []byte("01234567890123456789012345678901"), time.Now)
	tests := []string{
		`{"username":"wrong","password":"password"}`,
		`{"username":"m","password":"wrong"}`,
		`{"username":"","password":""}`,
		`{"username":"m","password":"password","actor":"attacker"}`,
		`{`,
		`{"username":"m","password":"password"}{}`,
	}
	for _, body := range tests {
		request := httptest.NewRequest(http.MethodPost, "/v1/creator/sessions", strings.NewReader(body))
		response := httptest.NewRecorder()
		handler(response, request)
		if response.Code != http.StatusUnauthorized || strings.TrimSpace(response.Body.String()) != "creator authentication denied" {
			t.Fatalf("body %q: status=%d response=%q", body, response.Code, response.Body.String())
		}
	}
}

func TestCreatorSessionHandlerPreservesBootstrapRecovery(t *testing.T) {
	handler := creatorSessionHandler("recovery", "", "", []byte("01234567890123456789012345678901"), time.Now)
	request := httptest.NewRequest(http.MethodPost, "/v1/creator/sessions", nil)
	request.Header.Set("Authorization", "Bearer recovery")
	response := httptest.NewRecorder()
	handler(response, request)
	if response.Code != http.StatusOK {
		t.Fatalf("bootstrap recovery status = %d", response.Code)
	}
}

func TestReadRequiredSecretFromEnvironment(t *testing.T) {
	t.Setenv("TEST_CREATOR_SECRET", "direct-value")
	value, err := readRequiredSecret("TEST_CREATOR_SECRET")
	if err != nil || value != "direct-value" {
		t.Fatalf("value=%q err=%v", value, err)
	}
}

func TestReadRequiredSecretFromFile(t *testing.T) {
	fileName := filepath.Join(t.TempDir(), "secret")
	if err := os.WriteFile(fileName, []byte("file-value\r\n"), 0o600); err != nil {
		t.Fatal(err)
	}
	t.Setenv("TEST_CREATOR_SECRET_FILE", fileName)
	value, err := readRequiredSecret("TEST_CREATOR_SECRET")
	if err != nil || value != "file-value" {
		t.Fatalf("value=%q err=%v", value, err)
	}
}

func TestReadRequiredSecretFailsClosed(t *testing.T) {
	t.Run("both sources", func(t *testing.T) {
		t.Setenv("TEST_CREATOR_SECRET", "direct")
		t.Setenv("TEST_CREATOR_SECRET_FILE", filepath.Join(t.TempDir(), "secret"))
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected ambiguous configuration to fail")
		}
	})
	t.Run("empty file", func(t *testing.T) {
		fileName := filepath.Join(t.TempDir(), "secret")
		if err := os.WriteFile(fileName, nil, 0o600); err != nil {
			t.Fatal(err)
		}
		t.Setenv("TEST_CREATOR_SECRET_FILE", fileName)
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected empty secret to fail")
		}
	})
	t.Run("multiline file", func(t *testing.T) {
		fileName := filepath.Join(t.TempDir(), "secret")
		if err := os.WriteFile(fileName, []byte("first\nsecond\n"), 0o600); err != nil {
			t.Fatal(err)
		}
		t.Setenv("TEST_CREATOR_SECRET_FILE", fileName)
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected multiline secret to fail")
		}
	})
	t.Run("missing file", func(t *testing.T) {
		t.Setenv("TEST_CREATOR_SECRET_FILE", filepath.Join(t.TempDir(), "missing"))
		if _, err := readRequiredSecret("TEST_CREATOR_SECRET"); err == nil {
			t.Fatal("expected missing secret file to fail")
		}
	})
}