/*
 * Copyright (C) 2008 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 com.android.server;

import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

public class LightsService {
    private static final String TAG = "LightsService";

    static final int LIGHT_ID_BACKLIGHT = 0;
    static final int LIGHT_ID_KEYBOARD = 1;
    static final int LIGHT_ID_BUTTONS = 2;
    static final int LIGHT_ID_BATTERY = 3;
    static final int LIGHT_ID_NOTIFICATIONS = 4;
    static final int LIGHT_ID_ATTENTION = 5;
    static final int LIGHT_ID_BLUETOOTH = 6;
    static final int LIGHT_ID_WIFI = 7;
    static final int LIGHT_ID_COUNT = 8;

    static final int LIGHT_FLASH_NONE = 0;
    static final int LIGHT_FLASH_TIMED = 1;
    static final int LIGHT_FLASH_HARDWARE = 2;

    /**
     * Light brightness is managed by a user setting.
     */
    static final int BRIGHTNESS_MODE_USER = 0;

    /**
     * Light brightness is managed by a light sensor.
     */
    static final int BRIGHTNESS_MODE_SENSOR = 1;

    private final Light mLights[] = new Light[LIGHT_ID_COUNT];

    public final class Light {

        private Light(int id) {
            mId = id;
        }

        public void setBrightness(int brightness) {
            setBrightness(brightness, BRIGHTNESS_MODE_USER);
        }

        public void setBrightness(int brightness, int brightnessMode) {
            synchronized (this) {
                int color = brightness & 0x000000ff;
                color = 0xff000000 | (color << 16) | (color << 8) | color;
                setLightLocked(color, LIGHT_FLASH_NONE, 0, 0, brightnessMode);
            }
        }

        public void setColor(int color) {
            synchronized (this) {
                setLightLocked(color, LIGHT_FLASH_NONE, 0, 0, 0);
            }
        }

        public void setFlashing(int color, int mode, int onMS, int offMS) {
            synchronized (this) {
                setLightLocked(color, mode, onMS, offMS, BRIGHTNESS_MODE_USER);
            }
        }

        public void pulse() {
            synchronized (this) {
                if (mColor == 0 && !mFlashing) {
                    setLightLocked(0x00ffffff, LIGHT_FLASH_HARDWARE, 7, 0, BRIGHTNESS_MODE_USER);
                    mH.sendMessageDelayed(Message.obtain(mH, 1, this), 3000);
                }
            }
        }

        public void turnOff() {
            synchronized (this) {
                setLightLocked(0, LIGHT_FLASH_NONE, 0, 0, 0);
            }
        }

        private void stopFlashing() {
            synchronized (this) {
                setLightLocked(mColor, LIGHT_FLASH_NONE, 0, 0, BRIGHTNESS_MODE_USER);
            }
        }

        private void setLightLocked(int color, int mode, int onMS, int offMS, int brightnessMode) {
            if (color != mColor || mode != mMode || onMS != mOnMS || offMS != mOffMS) {
                mColor = color;
                mMode = mode;
                mOnMS = onMS;
                mOffMS = offMS;
                setLight_native(mNativePointer, mId, color, mode, onMS, offMS, brightnessMode);
            }
        }

        private int mId;
        private int mColor;
        private int mMode;
        private int mOnMS;
        private int mOffMS;
        private boolean mFlashing;
    }

    LightsService(Context context) {

        mNativePointer = init_native();
        mContext = context;

        for (int i = 0; i < LIGHT_ID_COUNT; i++) {
            mLights[i] = new Light(i);
        }
    }

    protected void finalize() throws Throwable {
        finalize_native(mNativePointer);
        super.finalize();
    }

    public Light getLight(int id) {
        return mLights[id];
    }

    private Handler mH = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            Light light = (Light)msg.obj;
            light.stopFlashing();
        }
    };

    private static native int init_native();
    private static native void finalize_native(int ptr);

    private static native void setLight_native(int ptr, int light, int color, int mode,
            int onMS, int offMS, int brightnessMode);

    private final Context mContext;

    private int mNativePointer;
}
