/*
 * Copyright (C) 2012 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.hardware.display;

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

import java.util.Arrays;

Describes the current global state of Wifi display connectivity, including the
currently connected display and all available or remembered displays.

This object is immutable.

@hide
/**
 * Describes the current global state of Wifi display connectivity, including the
 * currently connected display and all available or remembered displays.
 * <p>
 * This object is immutable.
 * </p>
 *
 * @hide
 */
public final class WifiDisplayStatus implements Parcelable {
    private final int mFeatureState;
    private final int mScanState;
    private final int mActiveDisplayState;
    private final WifiDisplay mActiveDisplay;
    private final WifiDisplay[] mDisplays;

    
Session info needed for Miracast Certification /** Session info needed for Miracast Certification */
    private final WifiDisplaySessionInfo mSessionInfo;

    
Feature state: Wifi display is not available on this device. /** Feature state: Wifi display is not available on this device. */
    public static final int FEATURE_STATE_UNAVAILABLE = 0;
    
Feature state: Wifi display is disabled, probably because Wifi is disabled. /** Feature state: Wifi display is disabled, probably because Wifi is disabled. */
    public static final int FEATURE_STATE_DISABLED = 1;
    
Feature state: Wifi display is turned off in settings. /** Feature state: Wifi display is turned off in settings. */
    public static final int FEATURE_STATE_OFF = 2;
    
Feature state: Wifi display is turned on in settings. /** Feature state: Wifi display is turned on in settings. */
    public static final int FEATURE_STATE_ON = 3;

    
Scan state: Not currently scanning. /** Scan state: Not currently scanning. */
    public static final int SCAN_STATE_NOT_SCANNING = 0;
    
Scan state: Currently scanning. /** Scan state: Currently scanning. */
    public static final int SCAN_STATE_SCANNING = 1;

    
Display state: Not connected. /** Display state: Not connected. */
    public static final int DISPLAY_STATE_NOT_CONNECTED = 0;
    
Display state: Connecting to active display. /** Display state: Connecting to active display. */
    public static final int DISPLAY_STATE_CONNECTING = 1;
    
Display state: Connected to active display. /** Display state: Connected to active display. */
    public static final int DISPLAY_STATE_CONNECTED = 2;

    public static final Creator<WifiDisplayStatus> CREATOR = new Creator<WifiDisplayStatus>() {
        public WifiDisplayStatus createFromParcel(Parcel in) {
            int featureState = in.readInt();
            int scanState = in.readInt();
            int activeDisplayState= in.readInt();

            WifiDisplay activeDisplay = null;
            if (in.readInt() != 0) {
                activeDisplay = WifiDisplay.CREATOR.createFromParcel(in);
            }

            WifiDisplay[] displays = WifiDisplay.CREATOR.newArray(in.readInt());
            for (int i = 0; i < displays.length; i++) {
                displays[i] = WifiDisplay.CREATOR.createFromParcel(in);
            }

            WifiDisplaySessionInfo sessionInfo =
                    WifiDisplaySessionInfo.CREATOR.createFromParcel(in);

            return new WifiDisplayStatus(featureState, scanState, activeDisplayState,
                    activeDisplay, displays, sessionInfo);
        }

        public WifiDisplayStatus[] newArray(int size) {
            return new WifiDisplayStatus[size];
        }
    };

    public WifiDisplayStatus() {
        this(FEATURE_STATE_UNAVAILABLE, SCAN_STATE_NOT_SCANNING, DISPLAY_STATE_NOT_CONNECTED,
                null, WifiDisplay.EMPTY_ARRAY, null);
    }

    public WifiDisplayStatus(int featureState, int scanState, int activeDisplayState,
            WifiDisplay activeDisplay, WifiDisplay[] displays, WifiDisplaySessionInfo sessionInfo) {
        if (displays == null) {
            throw new IllegalArgumentException("displays must not be null");
        }

        mFeatureState = featureState;
        mScanState = scanState;
        mActiveDisplayState = activeDisplayState;
        mActiveDisplay = activeDisplay;
        mDisplays = displays;

        mSessionInfo = (sessionInfo != null) ? sessionInfo : new WifiDisplaySessionInfo();
    }

    
Returns the state of the Wifi display feature on this device.

The value of this property reflects whether the device supports the Wifi display,
whether it has been enabled by the user and whether the prerequisites for
connecting to displays have been met.

/**
     * Returns the state of the Wifi display feature on this device.
     * <p>
     * The value of this property reflects whether the device supports the Wifi display,
     * whether it has been enabled by the user and whether the prerequisites for
     * connecting to displays have been met.
     * </p>
     */
    public int getFeatureState() {
        return mFeatureState;
    }

    
Returns the current state of the Wifi display scan.
Returns:
One of: SCAN_STATE_NOT_SCANNING or SCAN_STATE_SCANNING./**
     * Returns the current state of the Wifi display scan.
     *
     * @return One of: {@link #SCAN_STATE_NOT_SCANNING} or {@link #SCAN_STATE_SCANNING}.
     */
    public int getScanState() {
        return mScanState;
    }

    
Get the state of the currently active display.
Returns:
One of: DISPLAY_STATE_NOT_CONNECTED, DISPLAY_STATE_CONNECTING, or DISPLAY_STATE_CONNECTED./**
     * Get the state of the currently active display.
     *
     * @return One of: {@link #DISPLAY_STATE_NOT_CONNECTED}, {@link #DISPLAY_STATE_CONNECTING},
     * or {@link #DISPLAY_STATE_CONNECTED}.
     */
    public int getActiveDisplayState() {
        return mActiveDisplayState;
    }

    
Gets the Wifi display that is currently active.  It may be connecting or
connected.
/**
     * Gets the Wifi display that is currently active.  It may be connecting or
     * connected.
     */
    public WifiDisplay getActiveDisplay() {
        return mActiveDisplay;
    }

    
Gets the list of Wifi displays, returns a combined list of all available
Wifi displays as reported by the most recent scan, and all remembered
Wifi displays (not necessarily available at the time).
/**
     * Gets the list of Wifi displays, returns a combined list of all available
     * Wifi displays as reported by the most recent scan, and all remembered
     * Wifi displays (not necessarily available at the time).
     */
    public WifiDisplay[] getDisplays() {
        return mDisplays;
    }

    
Gets the Wifi display session info (required for certification only)
/**
     * Gets the Wifi display session info (required for certification only)
     */
    public WifiDisplaySessionInfo getSessionInfo() {
        return mSessionInfo;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(mFeatureState);
        dest.writeInt(mScanState);
        dest.writeInt(mActiveDisplayState);

        if (mActiveDisplay != null) {
            dest.writeInt(1);
            mActiveDisplay.writeToParcel(dest, flags);
        } else {
            dest.writeInt(0);
        }

        dest.writeInt(mDisplays.length);
        for (WifiDisplay display : mDisplays) {
            display.writeToParcel(dest, flags);
        }

        mSessionInfo.writeToParcel(dest, flags);
    }

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

    // For debugging purposes only.
    @Override
    public String toString() {
        return "WifiDisplayStatus{featureState=" + mFeatureState
                + ", scanState=" + mScanState
                + ", activeDisplayState=" + mActiveDisplayState
                + ", activeDisplay=" + mActiveDisplay
                + ", displays=" + Arrays.toString(mDisplays)
                + ", sessionInfo=" + mSessionInfo
                + "}";
    }
}