WIP playlist style fix

src/screens/trip/NewTripScreen.tsx

@@ -84,6 +84,62 @@ function getRouteWaypoints(
   return waypoints;
 }
 
+const artistGenreCache = new Map<string, string[]>();
+
+async function getArtistGenres(artistId: string, token: string): Promise<string[]> {
+  if (!artistId) return [];
+  if (artistGenreCache.has(artistId)) {
+    return artistGenreCache.get(artistId) || [];
+  }
+  try {
+    const res = await fetch(`https://api.spotify.com/v1/artists/${artistId}`, {
+      headers: { Authorization: `Bearer ${token}` }
+    });
+    if (res.ok) {
+      const data = await res.json();
+      const genres = data.genres || [];
+      artistGenreCache.set(artistId, genres);
+      return genres;
+    } else {
+      console.warn(`[SpotifyPlaylists] Failed to fetch artist ${artistId}: status ${res.status}`);
+    }
+  } catch (err) {
+    console.warn(`[SpotifyPlaylists] Error fetching artist ${artistId}:`, err);
+  }
+  return [];
+}
+
+function genreMatches(artistGenres: string[], favoriteGenre: string): boolean {
+  const normalizedFav = favoriteGenre.toLowerCase().trim();
+  
+  const synonymMap: Record<string, string[]> = {
+    'fado': ['fado', 'portuguese fado'],
+    'rock': ['rock', 'classic rock', 'alternative rock'],
+    'rap': ['rap', 'hip hop', 'portuguese hip hop', 'hip-hop'],
+    'hip hop': ['hip hop', 'rap', 'hip-hop', 'portuguese hip hop'],
+    'hip-hop': ['hip hop', 'rap', 'hip-hop', 'portuguese hip hop'],
+    'pop': ['pop', 'portuguese pop'],
+    'funk': ['funk', 'baile funk', 'funk carioca'],
+    'electronic': ['electronic', 'edm', 'house', 'techno', 'electro']
+  };
+
+  const allowedSynonyms = [
+    normalizedFav,
+    ...(synonymMap[normalizedFav] || [])
+  ];
+
+  for (const genre of artistGenres) {
+    const normalizedGenre = genre.toLowerCase();
+    for (const syn of allowedSynonyms) {
+      if (normalizedGenre === syn || normalizedGenre.includes(syn)) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
 // ─────────────────────────────────────────────────────────────────────────────
 
 // @ts-ignore
@@ -127,6 +183,8 @@ export default function NewTripScreen({ navigation }) {
         let playlistCreationFailed = false;
         let playlistFailureReason = '';
         let playlistSuccessMessage = 'Viagem e playlist criadas com sucesso.';
+        let hasGenre = false;
+        let accumulatedDurationMs = 0;
 
         try {
           console.log("GENERATING_PLAYLIST_FOR_TRIP:", tripName);
@@ -304,311 +362,313 @@ export default function NewTripScreen({ navigation }) {
 
             console.log("PLAYLIST_FAVORITE_GENRE_USED:", favoriteGenre || "none");
 
-            const ollamaPrompt = `I am taking a roadtrip from ${origin} to ${destination}.
-The trip is called "${tripName}" and takes about ${duration}.
-The user's favorite music genre is: "${favoriteGenre || "not set"}".
+            hasGenre = Boolean(favoriteGenre && favoriteGenre.trim().length > 0);
+            const cleanGenre = hasGenre ? favoriteGenre.trim().toLowerCase() : "";
 
-Reply ONLY with a JSON array of up to 10 Spotify search queries.
-The queries should be varied and specific to this trip.
-If a favorite genre is set, strongly include it in the search ideas.
-Do NOT return song names.
-Do NOT return explanations.
-Example: ["rock road trip", "rock hits", "porto travel songs", "portuguese indie"].`;
+            console.log('[Playlist] favoriteMusicStyle:', favoriteGenre || '(empty)');
 
-            let aiQueries: string[] = [];
+            // ── Style → curated query map (artist-based; genre: filter unreliable for tracks)
+            const STYLE_QUERY_MAP: Record<string, string[]> = {
+              fado: [
+                'Amália Rodrigues', 'Mariza fado', 'Carlos do Carmo', 'Ana Moura',
+                'Dulce Pontes', 'Camané', 'Carminho fado', 'Mísia fado',
+                'Madredeus fado', 'João Braga fado', 'Rodrigo fado', 'Celeste Rodrigues',
+                'fado português', 'fado clássico', 'fado moderno', 'fado novo',
+                'músicas de fado', 'fado Lisboa', 'fado Coimbra',
+              ],
+              rock: [
+                'classic rock hits', 'rock road trip', 'alternative rock',
+                'rock classics', 'rock driving', 'hard rock hits', 'rock anthems',
+                'indie rock', 'portuguese rock', 'rock nacional',
+              ],
+              rap: [
+                'rap português', 'portuguese hip hop', 'rap viagem', 'hip hop road trip',
+                'trap hits', 'rap nacional', 'rap clássico', 'rap popular',
+              ],
+              'hip hop': [
+                'hip hop road trip', 'hip hop hits', 'rap viagem',
+                'portuguese hip hop', 'trap music', 'hip hop classics',
+              ],
+              pop: [
+                'pop português', 'pop hits', 'pop road trip', 'pop viagem',
+                'pop clássico', 'pop moderno', 'pop nacional',
+              ],
+              funk: [
+                'funk hits', 'baile funk', 'funk road trip', 'funk clássico',
+                'funk carioca', 'funk nacional',
+              ],
+              electronic: [
+                'electronic road trip', 'edm hits', 'house music driving',
+                'techno', 'electronic dance', 'electro hits',
+              ],
+            };
 
+            // Resolve style queries: use STYLE_QUERY_MAP if we recognise the genre, else build generic ones
+            const styleQueries: string[] = hasGenre
+              ? (
+                  STYLE_QUERY_MAP[cleanGenre] ??
+                  [
+                    cleanGenre,
+                    `${cleanGenre} hits`,
+                    `${cleanGenre} popular`,
+                    `${cleanGenre} viagem`,
+                    `${cleanGenre} clássico`,
+                    `${cleanGenre} moderno`,
+                    `músicas de ${cleanGenre}`,
+                  ]
+                )
+              : [];
+
+            // AI supplement: ask Ollama for artists/songs of the style only when genre is set
+            const ollamaPrompt = hasGenre
+              ? `The user's favorite music genre is: "${cleanGenre}".
+Reply ONLY with a JSON array of up to 10 well-known song titles or artist names that belong strictly to the "${cleanGenre}" genre.
+Do NOT include songs from other genres.
+Do NOT include explanation or markdown.
+Example for fado: ["Amália Rodrigues", "Mariza", "Ana Moura fado", "Carlos do Carmo"].`
+              : `I am taking a roadtrip from ${origin} to ${destination} ("${tripName}", ${duration}).
+Reply ONLY with a JSON array of up to 10 varied Spotify search queries for a road trip playlist.
+Do NOT return song names. Do NOT return explanations.
+Example: ["feel good road trip", "summer hits", "driving pop hits"].`;
+
+            let aiArtistQueries: string[] = [];
             try {
               const ollamaRes = await fetch(`${OLLAMA_API_URL}/api/chat`, {
-                method: "POST",
-                headers: { "Content-Type": "application/json" },
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
                 body: JSON.stringify({
-                  model: "qwen3-coder:30b",
-                  messages: [{ role: "user", content: ollamaPrompt }],
+                  model: 'qwen3-coder:30b',
+                  messages: [{ role: 'user', content: ollamaPrompt }],
                   stream: false,
                 }),
               });
-
-              const ollamaData = await safeParseJson(ollamaRes, "Ollama");
-              let rawAiText = ollamaData?.message?.content || "";
-
-              rawAiText = rawAiText
-                .replace(/```json/g, "")
-                .replace(/```/g, "")
-                .trim();
-
-              if (rawAiText.length > 0 && rawAiText.startsWith("[")) {
+              const ollamaData = await safeParseJson(ollamaRes, 'Ollama');
+              let rawAiText = (ollamaData?.message?.content || '')
+                .replace(/```json/g, '').replace(/```/g, '').trim();
+              if (rawAiText.startsWith('[')) {
                 const parsed = JSON.parse(rawAiText);
-
                 if (Array.isArray(parsed)) {
-                  aiQueries = parsed
-                    .map(String)
-                    .map(cleanSearchQuery)
-                    .filter(Boolean)
-                    .slice(0, 10);
+                  aiArtistQueries = parsed.map(String).map(cleanSearchQuery).filter(Boolean).slice(0, 10);
                 }
               }
-            } catch (aiError) {
-              console.log("AI parsing failed, using fallback queries.", aiError);
-            }
-
-            const favoriteGenreQueries = favoriteGenre
-              ? [
-                `${favoriteGenre} road trip`,
-                `${favoriteGenre} hits`,
-                `${favoriteGenre} travel songs`,
-                `${favoriteGenre} driving music`,
-                `${favoriteGenre} playlist`,
-                `${favoriteGenre} ${destination}`,
-              ]
-              : [];
-
-            const tripSpecificQueries = [
-              `${destination} road trip`,
-              `${origin} to ${destination} music`,
-              `${tripName} playlist`,
-              `${destination} travel songs`,
-              `${origin} ${destination} road trip`,
-            ];
-
-            const fallbackQueries = [
-              "road trip songs",
-              "travel songs",
-              "summer hits",
-              "top hits Portugal",
-              "pop hits",
-              "driving music",
-              "feel good road trip",
-              "european travel music",
-              "party road trip",
-              "indie road trip",
-            ];
-
-            const firstQueries = [
-              ...favoriteGenreQueries,
-              ...aiQueries,
-            ]
-              .map(cleanSearchQuery)
-              .filter(Boolean);
-
-            const remainingQueries = [
-              ...tripSpecificQueries,
-              ...fallbackQueries,
-            ]
-              .map(cleanSearchQuery)
-              .filter(Boolean);
-
-            const searchQueries = Array.from(
-              new Set([
-                ...firstQueries,
-                ...shuffleArray(remainingQueries),
-              ])
-            );
-
-            const playlistRandomSeed = `${Date.now()}-${Math.random()
-              .toString(36)
-              .slice(2)}`;
-
-            console.log("PLAYLIST_RANDOM_SEED:", playlistRandomSeed);
-            console.log("PLAYLIST_MUSIC_QUERIES:", searchQueries);
-
-            // D. Create empty playlist
-            const createPlaylistUrl = "https://api.spotify.com/v1/me/playlists";
-            const createPlaylistBody = JSON.stringify({
-              name: tripName,
-              description: `Roadtrip from ${origin} to ${destination}. Themes: ${searchQueries
-                .slice(0, 8)
-                .join(", ")}`,
-              public: false,
-            });
-
-            console.log("CREATE_PLAYLIST_URL:", createPlaylistUrl);
-            console.log("CREATE_PLAYLIST_BODY:", createPlaylistBody);
-
-            const createPlaylistRes = await fetch(createPlaylistUrl, {
-              method: "POST",
-              headers: {
-                Authorization: `Bearer ${providerToken}`,
-                "Content-Type": "application/json",
-              },
-              body: createPlaylistBody,
-            });
-
-            console.log("CREATE_PLAYLIST_HTTP_STATUS:", createPlaylistRes.status);
-
-            const createPlaylistResText = await createPlaylistRes.text();
-
-            if (!createPlaylistRes.ok) {
-              console.log(
-                "CREATE_PLAYLIST_RESPONSE_BODY_IF_FAILED:",
-                createPlaylistResText.substring(0, 300)
-              );
-
-              if (createPlaylistRes.status === 403) {
-                await clearSpotifyTokens();
-
-                console.warn(
-                  "CREATE_PLAYLIST_403: Cleared stale Spotify tokens. User must reconnect."
-                );
-
-                Alert.alert(
-                  "Permissão Spotify Necessária",
-                  "Reconecta o Spotify para dar permissão de criar playlists."
-                );
-
-                playlistCreationFailed = true;
-                playlistFailureReason = "scope";
-
-                throw new Error(
-                  "CREATE_PLAYLIST_SCOPE_ERROR: Tokens cleared, re-auth required."
-                );
-              }
-
-              throw new Error(
-                `Spotify API returned status ${createPlaylistRes.status
-                } for CreatePlaylist: ${createPlaylistResText.substring(0, 150)}`
-              );
-            }
-
-            let playlistData: any;
-
-            try {
-              playlistData = JSON.parse(createPlaylistResText);
             } catch {
-              throw new Error(
-                `Failed to parse JSON response for CreatePlaylist: ${createPlaylistResText.substring(
-                  0,
-                  150
-                )}`
-              );
+              console.log('[Playlist] AI query generation failed; continuing without it.');
             }
 
-            if (!playlistData.id) {
-              throw new Error("Could not create playlist");
-            }
+            // Generic roadtrip filler queries (only used in Phase 2 when no genre, or to pad when genre exhausted)
+            const genericFillerQueries = [
+              `${destination} road trip`, `${origin} to ${destination} music`,
+              'road trip hits', 'travel songs', 'driving music',
+              'summer hits', 'feel good road trip', 'top hits Portugal',
+            ].map(cleanSearchQuery).filter(Boolean);
 
-            const playlistId = playlistData.id;
-            generatedPlaylistUrl = playlistData.external_urls.spotify;
+            // ── Target track count (based on trip duration, ~4 min per song)
+            const tripDurationMinutes = tripDurationMs / 60000;
+            const TARGET_TRACK_COUNT = Math.max(10, Math.ceil(tripDurationMinutes / 4));
+            const STYLE_RATIO = 0.80;
+            const styleTargetCount = hasGenre ? Math.ceil(TARGET_TRACK_COUNT * STYLE_RATIO) : 0;
 
-            // E. Fill playlist with varied tracks based on duration
-            console.log("TARGET_PLAYLIST_DURATION_MS:", tripDurationMs);
+            console.log('[Playlist] targetTrackCount:', TARGET_TRACK_COUNT);
+            console.log('[Playlist] styleTargetCount:', styleTargetCount);
+            console.log('[Playlist] styleQueries:', styleQueries);
 
-            let accumulatedDurationMs = 0;
-            const selectedTracks: SelectedSpotifyTrack[] = [];
-            const selectedTrackIds = new Set<string>();
-            const artistCount = new Map<string, number>();
-
-            let searchRequestsCount = 0;
-            let queryIndex = 0;
-
-            const MAX_SEARCH_REQUESTS = 40;
-            const MAX_TRACKS = 400;
             const MAX_TRACKS_PER_ARTIST = 3;
 
-            while (
-              accumulatedDurationMs < tripDurationMs &&
-              searchRequestsCount < MAX_SEARCH_REQUESTS &&
-              selectedTracks.length < MAX_TRACKS &&
-              searchQueries.length > 0
-            ) {
-              const currentQuery = searchQueries[queryIndex % searchQueries.length];
-              const queryEncoded = encodeURIComponent(currentQuery);
-              const offset = getRandomSpotifyOffset();
+            // Helper to run Spotify track search for a given query and return accepted tracks
+            const selectedTrackIds = new Set<string>();
+            const artistCount = new Map<string, number>();
+            let totalRawResultsCount = 0;
+            let tracksRejectedCount = 0;
+            let searchRequestsCount = 0;
 
+            const searchAndFilter = async (
+              query: string,
+              validateGenre: boolean,
+            ): Promise<SelectedSpotifyTrack[]> => {
+              const results: SelectedSpotifyTrack[] = [];
+              const offsets = [0, 10, 20, 30];
+              for (const offset of offsets) {
+                if (accumulatedDurationMs >= tripDurationMs) break;
+                if (searchRequestsCount >= 60) break;
+
+                const queryEncoded = encodeURIComponent(query);
                 const searchUrl =
-                `https://api.spotify.com/v1/search` +
-                `?type=track` +
-                `&q=${queryEncoded}` +
-                `&limit=10` +
-                `&market=${spotifyUserCountry}` +
-                `&offset=${offset}`;
+                  `https://api.spotify.com/v1/search?type=track` +
+                  `&q=${queryEncoded}&limit=20&market=${spotifyUserCountry}&offset=${offset}`;
 
-              console.log("TRACK_SEARCH_QUERY:", currentQuery);
-              console.log("TRACK_SEARCH_OFFSET:", offset);
-              console.log("TRACK_SEARCH_URL:", searchUrl);
+                console.log('TRACK_SEARCH_QUERY:', query, '| offset:', offset);
 
                 const searchRes = await fetch(searchUrl, {
-                headers: {
-                  Authorization: `Bearer ${providerToken}`,
-                  "Content-Type": "application/json",
-                },
+                  headers: { Authorization: `Bearer ${providerToken}`, 'Content-Type': 'application/json' },
                 });
 
-              console.log("TRACK_SEARCH_STATUS:", searchRes.status);
+                searchRequestsCount++;
 
                 if (!searchRes.ok) {
                   const errText = await searchRes.text();
-
-                console.warn(
-                  "Spotify search failed:",
-                  searchRes.status,
-                  errText.substring(0, 150)
-                );
-
-                console.log(
-                  "TRACK_SEARCH_RESPONSE_BODY_IF_FAILED:",
-                  errText.substring(0, 300)
-                );
-
-                searchRequestsCount++;
-                queryIndex++;
-                continue;
+                  console.warn('[Playlist] Spotify search failed:', searchRes.status, errText.substring(0, 150));
+                  break;
                 }
-              const searchData = (await safeParseJson(searchRes, "SearchTracks")) as any;
 
+                const searchData = (await safeParseJson(searchRes, 'SearchTracks')) as any;
                 const rawTracks: SpotifySearchTrack[] = Array.isArray(searchData?.tracks?.items)
-                ? (searchData.tracks.items as SpotifySearchTrack[])
-                : [];
+                  ? searchData.tracks.items : [];
 
-              console.log("TRACKS_RAW_FOUND_COUNT:", rawTracks.length);
+                totalRawResultsCount += rawTracks.length;
+                console.log(`[Playlist] Query "${query}" offset ${offset}: ${rawTracks.length} raw tracks`);
 
-              const shuffledTracks = shuffleArray<SpotifySearchTrack>(rawTracks);
-
-              let tracksAfterFilter = 0;
-
-              for (const track of shuffledTracks) {
-                if (selectedTracks.length >= MAX_TRACKS) break;
+                for (const track of rawTracks) {
                   if (accumulatedDurationMs >= tripDurationMs) break;
 
                   const trackId = track.id;
                   const trackUri = track.uri;
                   const trackDurationMs = track.duration_ms;
 
-                if (!trackId) continue;
-                if (!trackUri) continue;
-                if (!trackDurationMs) continue;
+                  if (!trackId || !trackUri || !trackDurationMs) continue;
                   if (track.is_local === true) continue;
                   if (track.is_playable === false) continue;
                   if (selectedTrackIds.has(trackId)) continue;
 
+                  if (validateGenre && hasGenre) {
+                    const mainArtistId = track.artists?.[0]?.id;
+                    if (!mainArtistId) { tracksRejectedCount++; continue; }
+                    const artistGenres = await getArtistGenres(mainArtistId, providerToken);
+                    if (!genreMatches(artistGenres, cleanGenre)) {
+                      console.log(`[Playlist] REJECTED: "${track.artists?.[0]?.name}" genres=[${artistGenres.join(', ')}]`);
+                      tracksRejectedCount++;
+                      continue;
+                    }
+                  }
+
                   const artistKey = getMainArtistKey(track);
-                const currentArtistCount = artistCount.get(artistKey) ?? 0;
+                  if ((artistCount.get(artistKey) ?? 0) >= MAX_TRACKS_PER_ARTIST) continue;
 
-                if (currentArtistCount >= MAX_TRACKS_PER_ARTIST) continue;
+                  results.push({ id: trackId, uri: trackUri, duration_ms: trackDurationMs });
+                }
 
-                selectedTracks.push({
-                  id: trackId,
-                  uri: trackUri,
-                  duration_ms: trackDurationMs,
+                // Don't paginate if we already have plenty of tracks from this query
+                if (rawTracks.length < 20) break;
+              }
+              return results;
+            };
+
+            // D. Create empty Spotify playlist
+            const createPlaylistUrl = 'https://api.spotify.com/v1/me/playlists';
+            const createPlaylistBody = JSON.stringify({
+              name: tripName,
+              description: `Roadtrip from ${origin} to ${destination}${cleanGenre ? ` · ${cleanGenre} vibes` : ''}.`,
+              public: false,
             });
 
-                selectedTrackIds.add(trackId);
-                artistCount.set(artistKey, currentArtistCount + 1);
+            console.log('CREATE_PLAYLIST_URL:', createPlaylistUrl);
 
-                accumulatedDurationMs += trackDurationMs;
-                tracksAfterFilter++;
+            const createPlaylistRes = await fetch(createPlaylistUrl, {
+              method: 'POST',
+              headers: {
+                Authorization: `Bearer ${providerToken}`,
+                'Content-Type': 'application/json',
+              },
+              body: createPlaylistBody,
+            });
+
+            console.log('CREATE_PLAYLIST_HTTP_STATUS:', createPlaylistRes.status);
+            const createPlaylistResText = await createPlaylistRes.text();
+
+            if (!createPlaylistRes.ok) {
+              console.log('CREATE_PLAYLIST_RESPONSE_BODY_IF_FAILED:', createPlaylistResText.substring(0, 300));
+
+              if (createPlaylistRes.status === 403) {
+                await clearSpotifyTokens();
+                console.warn('CREATE_PLAYLIST_403: Cleared stale Spotify tokens. User must reconnect.');
+                Alert.alert('Permissão Spotify Necessária', 'Reconecta o Spotify para dar permissão de criar playlists.');
+                playlistCreationFailed = true;
+                playlistFailureReason = 'scope';
+                throw new Error('CREATE_PLAYLIST_SCOPE_ERROR: Tokens cleared, re-auth required.');
               }
 
-              console.log("TRACKS_AFTER_FILTER_COUNT:", tracksAfterFilter);
-              console.log("TRACKS_SELECTED_COUNT:", selectedTracks.length);
-              console.log("UNIQUE_ARTISTS_COUNT:", artistCount.size);
-              console.log("SELECTED_TRACKS_TOTAL_DURATION_MS:", accumulatedDurationMs);
-
-              searchRequestsCount++;
-              queryIndex++;
+              throw new Error(
+                `Spotify API returned status ${createPlaylistRes.status} for CreatePlaylist: ${createPlaylistResText.substring(0, 150)}`
+              );
             }
 
-            console.log("TRACKS_SELECTED_COUNT:", selectedTracks.length);
-            console.log("SELECTED_TRACKS_TOTAL_DURATION_MS:", accumulatedDurationMs);
+            let playlistData: any;
+            try {
+              playlistData = JSON.parse(createPlaylistResText);
+            } catch {
+              throw new Error(`Failed to parse JSON for CreatePlaylist: ${createPlaylistResText.substring(0, 150)}`);
+            }
+
+            if (!playlistData.id) throw new Error('Could not create playlist');
+
+            const playlistId = playlistData.id;
+            generatedPlaylistUrl = playlistData.external_urls.spotify;
+
+            console.log('TARGET_PLAYLIST_DURATION_MS:', tripDurationMs);
+
+            // ─── PHASE 1: Collect style tracks (80% of target, genre-validated) ─────────
+            const selectedTracks: SelectedSpotifyTrack[] = [];
+
+            const allStyleQueries = [...styleQueries, ...aiArtistQueries];
+            console.log('[Playlist] Phase 1 style queries:', allStyleQueries);
+
+            for (const query of allStyleQueries) {
+              if (selectedTracks.length >= styleTargetCount) break;
+              if (accumulatedDurationMs >= tripDurationMs) break;
+              if (searchRequestsCount >= 60) break;
+
+              const tracks = await searchAndFilter(query, true);
+              for (const t of tracks) {
+                if (selectedTracks.length >= styleTargetCount) break;
+                if (accumulatedDurationMs >= tripDurationMs) break;
+                if (selectedTrackIds.has(t.id)) continue;
+
+                const artistKey = getMainArtistKey(t as any);
+                if ((artistCount.get(artistKey) ?? 0) >= MAX_TRACKS_PER_ARTIST) continue;
+
+                selectedTracks.push(t);
+                selectedTrackIds.add(t.id);
+                artistCount.set(artistKey, (artistCount.get(artistKey) ?? 0) + 1);
+                accumulatedDurationMs += t.duration_ms;
+              }
+            }
+
+            console.log('[Playlist] After Phase 1 – styleTracks count:', selectedTracks.length, '| duration (ms):', accumulatedDurationMs);
+
+            // ─── PHASE 2: Fill remaining duration with roadtrip filler (no genre check) ─
+            if (!hasGenre && accumulatedDurationMs < tripDurationMs) {
+              const fillerQueries = [...aiArtistQueries, ...genericFillerQueries];
+              console.log('[Playlist] Phase 2 filler queries:', fillerQueries);
+
+              for (const query of fillerQueries) {
+                if (accumulatedDurationMs >= tripDurationMs) break;
+                if (searchRequestsCount >= 60) break;
+
+                const tracks = await searchAndFilter(query, false);
+                for (const t of tracks) {
+                  if (accumulatedDurationMs >= tripDurationMs) break;
+                  if (selectedTrackIds.has(t.id)) continue;
+
+                  const artistKey = getMainArtistKey(t as any);
+                  if ((artistCount.get(artistKey) ?? 0) >= MAX_TRACKS_PER_ARTIST) continue;
+
+                  selectedTracks.push(t);
+                  selectedTrackIds.add(t.id);
+                  artistCount.set(artistKey, (artistCount.get(artistKey) ?? 0) + 1);
+                  accumulatedDurationMs += t.duration_ms;
+                }
+              }
+
+              console.log('[Playlist] After Phase 2 – total tracks:', selectedTracks.length, '| duration (ms):', accumulatedDurationMs);
+            }
+
+            console.log('[Playlist] finalTracks:', selectedTracks.length);
+            console.log('[SpotifyPlaylistsDebug] Favorite Genre Received:', favoriteGenre || '(empty)');
+            console.log('[SpotifyPlaylistsDebug] Normalized Genre:', cleanGenre || '(empty)');
+            console.log('[SpotifyPlaylistsDebug] Target Duration (ms):', tripDurationMs);
+            console.log('[SpotifyPlaylistsDebug] Raw Tracks Found (Accumulated):', totalRawResultsCount);
+            console.log('[SpotifyPlaylistsDebug] Tracks Rejected by Genre:', tracksRejectedCount);
+            console.log('[SpotifyPlaylistsDebug] Final Tracks Added:', selectedTracks.length);
+            console.log('[SpotifyPlaylistsDebug] Final Playlist Duration (ms):', accumulatedDurationMs);
 
             if (selectedTracks.length > 0) {
               // F. Add tracks to playlist in chunks
@@ -655,6 +715,14 @@ Example: ["rock road trip", "rock hits", "porto travel songs", "portuguese indie
 
                 playlistCreationFailed = false;
 
+                if (hasGenre) {
+                  // Accept a tolerance of about 5-10 minutes (300,000 to 600,000 ms) below trip duration
+                  if (accumulatedDurationMs < tripDurationMs - 300000) {
+                    playlistSuccessMessage = "A playlist foi criada apenas com músicas do estilo escolhido, mas ficou mais curta porque não foram encontradas músicas suficientes.";
+                  } else {
+                    playlistSuccessMessage = "Viagem e playlist criadas com sucesso apenas com músicas do estilo escolhido!";
+                  }
+                } else {
                   if (
                     accumulatedDurationMs < tripDurationMs - 60000 &&
                     (selectedTracks.length >= MAX_TRACKS ||
@@ -670,6 +738,7 @@ Example: ["rock road trip", "rock hits", "porto travel songs", "portuguese indie
                     }
                   }
                 }
+              }
             } else {
               console.warn("No tracks found for queries:", searchQueries);
 
@@ -706,12 +775,20 @@ Example: ["rock road trip", "rock hits", "porto travel songs", "portuguese indie
           } else {
             if (playlistCreationFailed) {
               if (playlistFailureReason === 'notracks') {
+                if (hasGenre) {
+                  Alert.alert('Aviso', 'Não foi possível encontrar músicas suficientes desse estilo. Tenta outro estilo musical.');
+                } else {
                   Alert.alert('Sucesso!', 'Playlist criada, mas não foram encontradas músicas para adicionar.');
+                }
               } else {
                 Alert.alert('Sucesso!', 'Viagem guardada! A playlist do Spotify não pôde ser criada, mas a viagem foi guardada.');
               }
             } else if (generatedPlaylistUrl) {
+              if (hasGenre && accumulatedDurationMs < tripDurationMs - 300000) {
+                Alert.alert('Aviso', playlistSuccessMessage);
+              } else {
                 Alert.alert('Sucesso!', playlistSuccessMessage);
+              }
             } else {
               Alert.alert('Sucesso!', 'Viagem calculada e guardada!');
             }