ai-media-hub/backend/services/gemini_test.go

package services

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"
)

func TestTranslateQueryFallsBackToGoogleWithoutGeminiKey(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`[[["rainy city street","비 오는 도시 거리",null,null,1]],null,"ko"]`))
	}))
	defer server.Close()

	service := NewGeminiService("")
	service.Client = &http.Client{Timeout: 2 * time.Second}
	service.TranslateEndpoint = server.URL

	translated := service.TranslateQuery("비 오는 도시 거리")
	if translated != "rainy city street" {
		t.Fatalf("expected google fallback translation, got %q", translated)
	}
}

func TestTranslateQueryFallsBackToDictionaryWhenTranslateFails(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Error(w, "boom", http.StatusBadGateway)
	}))
	defer server.Close()

	service := NewGeminiService("")
	service.Client = &http.Client{Timeout: 2 * time.Second}
	service.TranslateEndpoint = server.URL

	translated := service.TranslateQuery("숲속 커플")
	if translated != "forest couple" {
		t.Fatalf("expected dictionary fallback translation, got %q", translated)
	}
}

func TestNormalizeKnownMediaPhrases(t *testing.T) {
	translated := translateKoreanMediaTerms("사이버 펑크 도시")
	if translated != "cyberpunk city" {
		t.Fatalf("expected cyberpunk city, got %q", translated)
	}
}

func TestSelectUnevaluatedCandidatesSkipsReviewedLinks(t *testing.T) {
	ranked := []SearchResult{
		{Link: "https://a.example"},
		{Link: "https://b.example"},
		{Link: "https://c.example"},
	}
	reviewed := map[string]bool{
		"https://a.example": true,
	}

	selected := SelectUnevaluatedCandidates(ranked, reviewed, 2)
	if len(selected) != 2 {
		t.Fatalf("expected 2 selected candidates, got %d", len(selected))
	}
	if selected[0].Link != "https://b.example" || selected[1].Link != "https://c.example" {
		t.Fatalf("unexpected selection order: %#v", selected)
	}
}

func TestRemainingGeminiCapacityShrinksWithReviewedItems(t *testing.T) {
	reviewed := []AIRecommendation{
		{Link: "https://a.example"},
		{Link: "https://b.example"},
	}
	if got := RemainingGeminiCapacity(reviewed); got != 14 {
		t.Fatalf("expected 14 remaining slots, got %d", got)
	}
}

func TestGeminiVisualCacheRoundTrip(t *testing.T) {
	service := NewGeminiService("")
	service.setCachedVisual("image\nhttps://example.com/thumb.jpg", "abc", "image/jpeg", time.Minute)

	data, mimeType, ok := service.getCachedVisual("image\nhttps://example.com/thumb.jpg")
	if !ok {
		t.Fatal("expected visual cache hit")
	}
	if data != "abc" || mimeType != "image/jpeg" {
		t.Fatalf("unexpected cached visual data: %q %q", data, mimeType)
	}
}

func TestGeminiTranslationCacheRoundTrip(t *testing.T) {
	service := NewGeminiService("")
	service.setCachedTranslation("비 오는 도시", "rainy city", time.Minute)

	value, ok := service.getCachedTranslation("비 오는 도시")
	if !ok {
		t.Fatal("expected translation cache hit")
	}
	if value != "rainy city" {
		t.Fatalf("unexpected translation cache value: %q", value)
	}
}

func TestGeminiExpansionCacheRoundTrip(t *testing.T) {
	service := NewGeminiService("")
	service.setCachedExpansion("city rain", []string{"city rain", "city rain stock footage"}, time.Minute)

	value, ok := service.getCachedExpansion("city rain")
	if !ok {
		t.Fatal("expected expansion cache hit")
	}
	if len(value) != 2 || value[1] != "city rain stock footage" {
		t.Fatalf("unexpected expansion cache value: %#v", value)
	}
}

func TestDecorateRecommendationMediaUsesEmbedForGoogleVideo(t *testing.T) {
	item := DecorateRecommendationMedia(AIRecommendation{
		Source: "Google Video",
		Link:   "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
	})
	if item.MediaMode != "embed" {
		t.Fatalf("expected embed media mode, got %q", item.MediaMode)
	}
	if item.EmbedURL == "" || !strings.Contains(item.EmbedURL, "youtube-nocookie.com/embed/") {
		t.Fatalf("unexpected embed url: %q", item.EmbedURL)
	}
}

func TestRankSearchResultsPrefersUsableVisuals(t *testing.T) {
	results := []SearchResult{
		{Title: "cyberpunk city", Link: "https://example.com/a", ThumbnailURL: "https://example.com/favicon.ico"},
		{Title: "cyberpunk city", Link: "https://example.com/b", ThumbnailURL: "https://example.com/frame.jpg"},
	}
	ranked := RankSearchResults("cyberpunk city", results)
	if ranked[0].Link != "https://example.com/b" {
		t.Fatalf("expected usable thumbnail result first, got %#v", ranked)
	}
}