trigger endpoint and retry suggestions

internal/client/llm.go

@@ -119,12 +119,14 @@ func parseMovieSuggestions(content string) ([]model.MovieSuggestion, error) {
 }
 
 // BuildPrompt constructs the recommendation prompt sent to the LLM.
-func BuildPrompt(favorites, watched, library []model.Movie, count int) string {
+// previouslySuggested contains movies returned in prior retry attempts that must not be repeated.
+func BuildPrompt(favorites, watched, library, previouslySuggested []model.Movie, count int) string {
 	var sb strings.Builder
 	sb.WriteString(fmt.Sprintf(
 		"You are a movie recommendation engine. Based on the user's favorite and recently watched movies below, suggest exactly %d movies they would enjoy.\n\n"+
 			"IMPORTANT:\n"+
 			"- Do NOT suggest any movie from the \"Already In Library\" list.\n"+
+			"- Do NOT suggest any movie from the \"Already Suggested\" list.\n"+
 			"- Return ONLY a JSON array, no other text.\n"+
 			"- Each entry: {\"title\": \"Movie Title\", \"year\": 2024, \"reason\": \"brief reason\"}\n\n"+
 			"User's favorite movies:\n", count))
@@ -150,5 +152,13 @@ func BuildPrompt(favorites, watched, library []model.Movie, count int) string {
 	for _, m := range library {
 		sb.WriteString(fmt.Sprintf("- %s (%d)\n", m.Name, m.Year))
 	}
+
+	if len(previouslySuggested) > 0 {
+		sb.WriteString("\nAlready suggested (DO NOT repeat these):\n")
+		for _, m := range previouslySuggested {
+			sb.WriteString(fmt.Sprintf("- %s (%d)\n", m.Name, m.Year))
+		}
+	}
+
 	return sb.String()
 }

internal/controller/recommendations.go

@@ -21,6 +21,7 @@ func NewRecommendationsController(mux *http.ServeMux, cfg *configs.Config, rec *
 	c := &RecommendationsController{cfg: cfg, rec: rec}
 	mux.HandleFunc("GET /recommendations", c.handleList)
 	mux.HandleFunc("POST /recommendations/search", c.handleSearch)
+	mux.HandleFunc("POST /recommendations/trigger", c.handleTrigger)
 	return c
 }
 
@@ -53,6 +54,21 @@ func (c *RecommendationsController) handleList(w http.ResponseWriter, r *http.Re
 	httputil.WriteJSON(w, http.StatusOK, recs)
 }
 
+// handleTrigger runs the same pipeline as the cron job: recommend + auto-request if Radarr is enabled.
+func (c *RecommendationsController) handleTrigger(w http.ResponseWriter, r *http.Request) {
+	log.Info().Msg("Trigger: running recommendation pipeline")
+	recs, err := c.rec.Run()
+	if err != nil {
+		log.Error().Err(err).Msg("Trigger: pipeline failed")
+		httputil.WriteError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	if c.cfg.RadarrEnabled {
+		c.rec.AutoRequest(recs)
+	}
+	httputil.WriteJSON(w, http.StatusOK, recs)
+}
+
 // handleSearch performs a natural-language LLM search and resolves results via TMDb.
 // Body: {"query": "sci-fi movies like Blade Runner but more recent"}
 func (c *RecommendationsController) handleSearch(w http.ResponseWriter, r *http.Request) {

internal/service/recommender.go

@@ -79,42 +79,58 @@ func (r *Recommender) RunWithCount(count int) ([]model.Recommendation, error) {
 		}
 	}
 
-	// 3. Get raw suggestions
-	var suggestions []model.MovieSuggestion
-	if r.cfg.LLMEnabled && r.llm != nil {
-		prompt := client.BuildPrompt(favorites, watchedMovies, library, count)
-		suggestions, err = r.llm.Recommend(prompt)
-		if err != nil {
-			return nil, fmt.Errorf("llm recommendation failed: %w", err)
-		}
-		log.Info().Msgf("LLM returned %d suggestions", len(suggestions))
-	} else {
-		suggestions = r.tmdbFallback(signalMovies, exclude, count)
-		log.Info().Msgf("TMDb fallback returned %d suggestions", len(suggestions))
-	}
-
-	// 4. Resolve suggestions via TMDb and apply exclusions
+	// 3. Retry loop: each attempt requests only the remaining needed count.
+	//    `seen` accumulates every TMDb-resolved movie across attempts so the
+	//    LLM prompt excludes them by name, not just by ID.
 	var recommendations []model.Recommendation
-	for _, s := range suggestions {
-		if len(recommendations) >= count {
+	var seen []model.Movie
+	for attempt := 0; attempt <= r.cfg.RecommendMaxRetry && len(recommendations) < count; attempt++ {
+		remaining := count - len(recommendations)
+		if attempt > 0 {
+			log.Info().Msgf("Retry %d/%d: need %d more recommendations", attempt, r.cfg.RecommendMaxRetry, remaining)
+		}
+
+		var suggestions []model.MovieSuggestion
+		if r.cfg.LLMEnabled && r.llm != nil {
+			prompt := client.BuildPrompt(favorites, watchedMovies, library, seen, remaining)
+			suggestions, err = r.llm.Recommend(prompt)
+			if err != nil {
+				return recommendations, fmt.Errorf("llm recommendation failed: %w", err)
+			}
+			log.Info().Msgf("LLM returned %d suggestions (attempt %d)", len(suggestions), attempt+1)
+		} else {
+			suggestions = r.tmdbFallback(signalMovies, exclude, remaining)
+			log.Info().Msgf("TMDb fallback returned %d suggestions (attempt %d)", len(suggestions), attempt+1)
+		}
+
+		before := len(recommendations)
+		for _, s := range suggestions {
+			if len(recommendations) >= count {
+				break
+			}
+			tm, err := r.tmdb.SearchMovie(s.Title, s.Year)
+			if err != nil || tm == nil {
+				log.Debug().Msgf("Could not resolve: %s (%d)", s.Title, s.Year)
+				continue
+			}
+			seen = append(seen, model.Movie{Name: tm.Title, Year: tm.Year, TMDbID: strconv.Itoa(tm.ID)})
+			if exclude[tm.ID] {
+				log.Debug().Msgf("Skipping (already in library): %s", tm.Title)
+				continue
+			}
+			exclude[tm.ID] = true
+			recommendations = append(recommendations, model.Recommendation{
+				Title:  tm.Title,
+				Year:   tm.Year,
+				TMDbID: tm.ID,
+				Reason: s.Reason,
+			})
+		}
+
+		if len(recommendations) == before {
+			log.Warn().Msgf("No new recommendations found on attempt %d, stopping retries", attempt+1)
 			break
 		}
-		tm, err := r.tmdb.SearchMovie(s.Title, s.Year)
-		if err != nil || tm == nil {
-			log.Debug().Msgf("Could not resolve: %s (%d)", s.Title, s.Year)
-			continue
-		}
-		if exclude[tm.ID] {
-			log.Debug().Msgf("Skipping (already in library): %s", tm.Title)
-			continue
-		}
-		exclude[tm.ID] = true
-		recommendations = append(recommendations, model.Recommendation{
-			Title:  tm.Title,
-			Year:   tm.Year,
-			TMDbID: tm.ID,
-			Reason: s.Reason,
-		})
 	}
 
 	return recommendations, nil

internal/utl/configs/config.go

@@ -28,8 +28,9 @@ type Config struct {
 	APIEnabled bool `envconfig:"API_ENABLED" default:"true"`
 	APIPort    int  `envconfig:"API_PORT" default:"8080"`
 
-	RecommendCount int `envconfig:"RECOMMEND_COUNT" default:"10"`
-	MinRatedMovies int `envconfig:"MIN_RATED_MOVIES" default:"5"`
+	RecommendCount    int `envconfig:"RECOMMEND_COUNT" default:"10"`
+	RecommendMaxRetry int `envconfig:"RECOMMEND_MAX_RETRY" default:"3"`
+	MinRatedMovies    int `envconfig:"MIN_RATED_MOVIES" default:"5"`
 }
 
 // Load reads .env (best-effort) then processes environment variables into a Config.

internal/utl/httputil/httputil.go

@@ -3,6 +3,7 @@ package httputil
 import (
 	"encoding/json"
 	"net/http"
+	"strings"
 )
 
 func WriteJSON(w http.ResponseWriter, status int, v any) {
@@ -14,3 +15,21 @@ func WriteJSON(w http.ResponseWriter, status int, v any) {
 func WriteError(w http.ResponseWriter, status int, msg string) {
 	WriteJSON(w, status, map[string]string{"error": msg})
 }
+
+// AuthMiddleware validates the Authorization: Bearer <key> header.
+// If secretKey is empty, auth is disabled and all requests pass through.
+// /health is always exempt.
+func AuthMiddleware(secretKey string, next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if secretKey == "" || r.URL.Path == "/health" {
+			next.ServeHTTP(w, r)
+			return
+		}
+		token, ok := strings.CutPrefix(r.Header.Get("Authorization"), "Bearer ")
+		if !ok || token != secretKey {
+			WriteError(w, http.StatusUnauthorized, "unauthorized")
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}

internal/utl/server/server.go

@@ -7,6 +7,7 @@ import (
 	"github.com/fjurmanovic/sugarr/internal/api"
 	"github.com/fjurmanovic/sugarr/internal/service"
 	"github.com/fjurmanovic/sugarr/internal/utl/configs"
+	"github.com/fjurmanovic/sugarr/internal/utl/httputil"
 	"github.com/rs/zerolog/log"
 )
 
@@ -17,5 +18,8 @@ func Start(cfg *configs.Config, rec *service.Recommender) error {
 
 	addr := fmt.Sprintf(":%d", cfg.APIPort)
 	log.Info().Msgf("HTTP API listening on %s", addr)
-	return http.ListenAndServe(addr, mux)
+	if cfg.APISecretKey != "" {
+		log.Info().Msg("Secret key auth enabled")
+	}
+	return http.ListenAndServe(addr, httputil.AuthMiddleware(cfg.APISecretKey, mux))
 }