package xyz.gianlu.librespot.mercury;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.spotify.Mercury;
import com.spotify.context.ContextPageOuterClass;
import com.spotify.context.ContextTrackOuterClass;
import com.spotify.metadata.Metadata;
import com.spotify.playlist4.Playlist4ApiProto;
import com.spotify.playlist_annotate3.PlaylistAnnotate3;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import xyz.gianlu.librespot.common.ProtoUtils;
import xyz.gianlu.librespot.mercury.model.*;

import java.util.List;

/**
 * @author Gianlu
 */
public final class MercuryRequests {
    private static final String KEYMASTER_CLIENT_ID = "65b708073fc0480ea92a077233ca87bd";

    private MercuryRequests() {
    }

    @NotNull
    public static ProtobufMercuryRequest<Playlist4ApiProto.SelectedListContent> getRootPlaylists(@NotNull String username) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(String.format("hm://playlist/user/%s/rootlist", username)),
                Playlist4ApiProto.SelectedListContent.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<PlaylistAnnotate3.PlaylistAnnotation> getPlaylistAnnotation(@NotNull PlaylistId id) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(id.toMercuryUri(true)),
                PlaylistAnnotate3.PlaylistAnnotation.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<Playlist4ApiProto.SelectedListContent> getPlaylist(@NotNull PlaylistId id) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(id.toMercuryUri(false)),
                Playlist4ApiProto.SelectedListContent.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<Metadata.Track> getTrack(@NotNull TrackId id) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(id.toMercuryUri()), Metadata.Track.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<Metadata.Artist> getArtist(@NotNull ArtistId id) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(id.toMercuryUri()), Metadata.Artist.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<Metadata.Album> getAlbum(@NotNull AlbumId id) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(id.toMercuryUri()), Metadata.Album.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<Metadata.Episode> getEpisode(@NotNull EpisodeId id) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(id.toMercuryUri()), Metadata.Episode.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<Metadata.Show> getShow(@NotNull ShowId id) {
        return new ProtobufMercuryRequest<>(RawMercuryRequest.get(id.toMercuryUri()), Metadata.Show.parser());
    }

    @NotNull
    public static ProtobufMercuryRequest<Mercury.MercuryMultiGetReply> multiGet(@NotNull String uri, Mercury.MercuryRequest... subs) {
        RawMercuryRequest.Builder request = RawMercuryRequest.newBuilder()
                .setContentType("vnd.spotify/mercury-mget-request")
                .setMethod("GET")
                .setUri(uri);

        Mercury.MercuryMultiGetRequest.Builder multi = Mercury.MercuryMultiGetRequest.newBuilder();
        for (Mercury.MercuryRequest sub : subs)
            multi.addRequest(sub);

        request.addProtobufPayload(multi.build());
        return new ProtobufMercuryRequest<>(request.build(), Mercury.MercuryMultiGetReply.parser());
    }

    @NotNull
    public static JsonMercuryRequest<StationsWrapper> getStationFor(@NotNull String context) {
        return new JsonMercuryRequest<>(RawMercuryRequest.get("hm://radio-apollo/v3/stations/" + context), StationsWrapper.class);
    }

    @NotNull
    public static RawMercuryRequest autoplayQuery(@NotNull String context) {
        return RawMercuryRequest.get("hm://autoplay-enabled/query?uri=" + context);
    }

    @NotNull
    public static JsonMercuryRequest<GenericJsonWrapper> getAlbumInfo(@NotNull String albumId) {
        return new JsonMercuryRequest<>(RawMercuryRequest.get(String.format("hm://album/v1/album-app/album/spotify:album:%s/desktop?catalogue=free&locale=en", albumId)), GenericJsonWrapper.class);
    }

    @NotNull
    public static JsonMercuryRequest<GenericJsonWrapper> getArtistInfo(@NotNull String artistId) {
    	//return new JsonMercuryRequest<>(RawMercuryRequest.get(String.format("hm://artist/v1/artist-app/albums/spotify:artist:%s/desktop?catalogue=free&locale=en", artistId)), GenericJsonWrapper.class);
    	return new JsonMercuryRequest<>(RawMercuryRequest.get(String.format("hm://artist/v1/%s/desktop?format=json&locale=en&cat=1", artistId)), GenericJsonWrapper.class); // Hermes URI comes from Spotify client (Apps/artist.spa/artist.bundle.js)
    }
    /*
    @NotNull
    public static List<String> getArtistExclusions(@NotNull String artistId) {
        String json = readUrl(String.format("http://chartmasters.chartmasters-api.com/wp-json/wp/v2/pages/13179?artist_id=%s", artistId));

			Gson gson = new Gson();        
			List<String> excludedAlbums = gson.fromJson(json, List.class);

			System.out.println(json);
			System.out.println(excludedAlbums);
    	return excludedAlbums;
    }
    */
    // hm://album/v1/artist-app/albums/desktop 
    @NotNull
    public static JsonMercuryRequest<GenericJsonWrapper> getArtistAbout(@NotNull String artistId) {
        return new JsonMercuryRequest<>(RawMercuryRequest.get(String.format("hm://artist-identity-view/v2/profile/%s?fields=name,monthlyListeners,monthlyListenersDelta,cities&imgSize=large", artistId)), GenericJsonWrapper.class); // Hermes URI comes from Spotify client (Apps/artist.spa/artist.bundle.js)
    }

    @NotNull
    public static JsonMercuryRequest<GenericJsonWrapper> getArtistInsights(@NotNull String artistId) {
        return new JsonMercuryRequest<>(RawMercuryRequest.get(String.format("hm://creatorabout/v0/artist-insights/%s", artistId)), GenericJsonWrapper.class); // Hermes URI comes from Spotify client (Apps/artist.spa/artist.bundle.js)
    }

    @NotNull
    public static RawMercuryRequest getAlbumInfoRaw(@NotNull String albumId) {
        return RawMercuryRequest.get(String.format("hm://album/v1/album-app/album/spotify:album:%s/desktop?catalogue=free&locale=en", albumId));
    }

    @NotNull
    public static JsonMercuryRequest<ResolvedContextWrapper> resolveContext(@NotNull String uri) {
        return new JsonMercuryRequest<>(RawMercuryRequest.get(String.format("hm://context-resolve/v1/%s", uri)), ResolvedContextWrapper.class);
    }

    @NotNull
    public static JsonMercuryRequest<KeymasterToken> requestToken(@NotNull String deviceId, @NotNull String scope) {
        return new JsonMercuryRequest<>(RawMercuryRequest.get(String.format("hm://keymaster/token/authenticated?scope=%s&client_id=%s&device_id=%s", scope, KEYMASTER_CLIENT_ID, deviceId)), KeymasterToken.class);
    }

    @NotNull
    private static String getAsString(@NotNull JsonObject obj, @NotNull String key) {
        JsonElement elm = obj.get(key);
        if (elm == null) throw new IllegalArgumentException("Unexpected null value for " + key);
        else return elm.getAsString();
    }

    public static final class StationsWrapper extends JsonWrapper {

        public StationsWrapper(@NotNull JsonObject obj) {
            super(obj);
        }

        @NotNull
        public String uri() {
            return getAsString(obj, "uri");
        }

        @NotNull
        public List<ContextTrackOuterClass.ContextTrack> tracks() {
            return ProtoUtils.jsonToContextTracks(obj.getAsJsonArray("tracks"));
        }
    }

    public static final class ResolvedContextWrapper extends JsonWrapper {

        public ResolvedContextWrapper(@NotNull JsonObject obj) {
            super(obj);
        }

        @NotNull
        public List<ContextPageOuterClass.ContextPage> pages() {
            return ProtoUtils.jsonToContextPages(obj.getAsJsonArray("pages"));
        }

        @Nullable
        public JsonObject metadata() {
            return obj.getAsJsonObject("metadata");
        }

        @NotNull
        public String uri() {
            return getAsString(obj, "uri");
        }

        @NotNull
        public String url() {
            return getAsString(obj, "url");
        }
    }

    public static final class KeymasterToken extends JsonWrapper {

        public KeymasterToken(@NotNull JsonObject obj) {
            super(obj);
        }
    }

    public static final class GenericJsonWrapper extends JsonWrapper {

        public GenericJsonWrapper(@NotNull JsonObject obj) {
            super(obj);
        }
    }
    /*
    private static String readUrl(String urlString) throws Exception {
        BufferedReader reader = null;
        try {
            URL url = new URL(urlString);
            reader = new BufferedReader(new InputStreamReader(url.openStream()));
            StringBuffer buffer = new StringBuffer();
            int read;
            char[] chars = new char[1024];
            while ((read = reader.read(chars)) != -1)
                buffer.append(chars, 0, read); 

            return buffer.toString();
        } finally {
            if (reader != null)
                reader.close();
        }
    }
	*/
}