/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package android.speech.tts;

import android.os.Parcel;
import android.os.Parcelable;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;

Characteristics and features of a Text-To-Speech Voice. Each TTS Engine can expose
multiple voices for each locale, with different set of features.
/**
 * Characteristics and features of a Text-To-Speech Voice. Each TTS Engine can expose
 * multiple voices for each locale, with different set of features.
 */
public class Voice implements Parcelable {
    
Very low, but still intelligible quality of speech synthesis /** Very low, but still intelligible quality of speech synthesis */
    public static final int QUALITY_VERY_LOW = 100;

    
Low, not human-like quality of speech synthesis /** Low, not human-like quality of speech synthesis */
    public static final int QUALITY_LOW = 200;

    
Normal quality of speech synthesis /** Normal quality of speech synthesis */
    public static final int QUALITY_NORMAL = 300;

    
High, human-like quality of speech synthesis /** High, human-like quality of speech synthesis */
    public static final int QUALITY_HIGH = 400;

    
Very high, almost human-indistinguishable quality of speech synthesis /** Very high, almost human-indistinguishable quality of speech synthesis */
    public static final int QUALITY_VERY_HIGH = 500;

    
Very low expected synthesizer latency (< 20ms) /** Very low expected synthesizer latency (< 20ms) */
    public static final int LATENCY_VERY_LOW = 100;

    
Low expected synthesizer latency (~20ms) /** Low expected synthesizer latency (~20ms) */
    public static final int LATENCY_LOW = 200;

    
Normal expected synthesizer latency (~50ms) /** Normal expected synthesizer latency (~50ms) */
    public static final int LATENCY_NORMAL = 300;

    
Network based expected synthesizer latency (~200ms) /** Network based expected synthesizer latency (~200ms) */
    public static final int LATENCY_HIGH = 400;

    
Very slow network based expected synthesizer latency (> 200ms) /** Very slow network based expected synthesizer latency (> 200ms) */
    public static final int LATENCY_VERY_HIGH = 500;

    private final String mName;
    private final Locale mLocale;
    private final int mQuality;
    private final int mLatency;
    private final boolean mRequiresNetworkConnection;
    private final Set<String> mFeatures;

    public Voice(String name,
            Locale locale,
            int quality,
            int latency,
            boolean requiresNetworkConnection,
            Set<String> features) {
        this.mName = name;
        this.mLocale = locale;
        this.mQuality = quality;
        this.mLatency = latency;
        this.mRequiresNetworkConnection = requiresNetworkConnection;
        this.mFeatures = features;
    }

    private Voice(Parcel in) {
        this.mName = in.readString();
        this.mLocale = (Locale)in.readSerializable();
        this.mQuality = in.readInt();
        this.mLatency = in.readInt();
        this.mRequiresNetworkConnection = (in.readByte() == 1);
        this.mFeatures = new HashSet<String>();
        Collections.addAll(this.mFeatures, in.readStringArray());
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(mName);
        dest.writeSerializable(mLocale);
        dest.writeInt(mQuality);
        dest.writeInt(mLatency);
        dest.writeByte((byte) (mRequiresNetworkConnection ? 1 : 0));
        dest.writeStringList(new ArrayList<String>(mFeatures));
    }

    @Override
    public int describeContents() {
        return 0;
    }

    public static final Parcelable.Creator<Voice> CREATOR = new Parcelable.Creator<Voice>() {
        @Override
        public Voice createFromParcel(Parcel in) {
            return new Voice(in);
        }

        @Override
        public Voice[] newArray(int size) {
            return new Voice[size];
        }
    };


    
Returns:
The voice's locale/**
     * @return The voice's locale
     */
    public Locale getLocale() {
        return mLocale;
    }

    
See Also:
QUALITY_VERY_HIGH
QUALITY_HIGH
QUALITY_NORMAL
QUALITY_LOW
QUALITY_VERY_LOW
Returns:
The voice's quality (higher is better)/**
     * @return The voice's quality (higher is better)
     * @see #QUALITY_VERY_HIGH
     * @see #QUALITY_HIGH
     * @see #QUALITY_NORMAL
     * @see #QUALITY_LOW
     * @see #QUALITY_VERY_LOW
     */
    public int getQuality() {
        return mQuality;
    }

    
See Also:
LATENCY_VERY_LOW
LATENCY_LOW
LATENCY_NORMAL
LATENCY_HIGH
LATENCY_VERY_HIGH
Returns:
The voice's latency (lower is better)/**
     * @return The voice's latency (lower is better)
     * @see #LATENCY_VERY_LOW
     * @see #LATENCY_LOW
     * @see #LATENCY_NORMAL
     * @see #LATENCY_HIGH
     * @see #LATENCY_VERY_HIGH
     */
    public int getLatency() {
        return mLatency;
    }

    
Returns:
Does the Voice require a network connection to work./**
     * @return Does the Voice require a network connection to work.
     */
    public boolean isNetworkConnectionRequired() {
        return mRequiresNetworkConnection;
    }

    
Returns:
Unique voice name./**
     * @return Unique voice name.
     */
    public String getName() {
        return mName;
    }

    
Returns the set of features it supports for a given voice. Features can either be framework defined, e.g. Engine.KEY_FEATURE_NETWORK_TIMEOUT_MS or engine specific. Engine specific keys must be prefixed by the name of the engine they are intended for. These keys can be used as parameters to TextToSpeech.speak(String, int, HashMap<String,String>) and TextToSpeech.synthesizeToFile(String, HashMap<String,String>, String). Features values are strings and their values must met restrictions described in their documentation. 
Returns:
Set instance. May return null on error./**
     * Returns the set of features it supports for a given voice.
     * Features can either be framework defined, e.g.
     * {@link TextToSpeech.Engine#KEY_FEATURE_NETWORK_TIMEOUT_MS} or engine specific.
     * Engine specific keys must be prefixed by the name of the engine they
     * are intended for. These keys can be used as parameters to
     * {@link TextToSpeech#speak(String, int, java.util.HashMap)} and
     * {@link TextToSpeech#synthesizeToFile(String, java.util.HashMap, String)}.
     *
     * Features values are strings and their values must met restrictions described in their
     * documentation.
     *
     * @return Set instance. May return {@code null} on error.
     */
    public Set<String> getFeatures() {
        return mFeatures;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder(64);
        return builder.append("Voice[Name: ").append(mName)
                .append(", locale: ").append(mLocale)
                .append(", quality: ").append(mQuality)
                .append(", latency: ").append(mLatency)
                .append(", requiresNetwork: ").append(mRequiresNetworkConnection)
                .append(", features: ").append(mFeatures.toString())
                .append("]").toString();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((mFeatures == null) ? 0 : mFeatures.hashCode());
        result = prime * result + mLatency;
        result = prime * result + ((mLocale == null) ? 0 : mLocale.hashCode());
        result = prime * result + ((mName == null) ? 0 : mName.hashCode());
        result = prime * result + mQuality;
        result = prime * result + (mRequiresNetworkConnection ? 1231 : 1237);
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        Voice other = (Voice) obj;
        if (mFeatures == null) {
            if (other.mFeatures != null) {
                return false;
            }
        } else if (!mFeatures.equals(other.mFeatures)) {
            return false;
        }
        if (mLatency != other.mLatency) {
            return false;
        }
        if (mLocale == null) {
            if (other.mLocale != null) {
                return false;
            }
        } else if (!mLocale.equals(other.mLocale)) {
            return false;
        }
        if (mName == null) {
            if (other.mName != null) {
                return false;
            }
        } else if (!mName.equals(other.mName)) {
            return false;
        }
        if (mQuality != other.mQuality) {
            return false;
        }
        if (mRequiresNetworkConnection != other.mRequiresNetworkConnection) {
            return false;
        }
        return true;
    }
}