/*
 * Copyright (C) 2013 The CyanogenMod 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 org.cyanogenmod.hardware;

import org.cyanogenmod.hardware.util.FileUtils;
import java.io.File;

public class DisplayColorCalibration {
    private static final String[] COLOR_FILE = new String[] {
            "/sys/class/misc/samoled_color/red_multiplier",
            "/sys/class/misc/samoled_color/green_multiplier",
            "/sys/class/misc/samoled_color/blue_multiplier"
    };
    private static final String COLOR_FILE_V2 = "/sys/class/misc/colorcontrol/multiplier";

    public static boolean isSupported() {
        if (new File(COLOR_FILE_V2).exists()) {
            return true;
        }
        for (String filePath : COLOR_FILE) {
            if (!new File(filePath).exists()) {
                return false;
            }
        }
        return true;
    }

    public static int getMaxValue() {
        return 2000000000;  // Real value: 4000000000
    }

    public static int getMinValue() {
        return 0;
    }

    public static int getDefValue() {
        return 1000000000;  // Real value: 2000000000
    }

    public static String getCurColors() {
        StringBuilder values = new StringBuilder();
        if (new File(COLOR_FILE_V2).exists()) {
            String[] valuesSplit = FileUtils.readOneLine(COLOR_FILE_V2).split(" ");
            for (int i = 0; i < valuesSplit.length; i++) {
                values.append(Long.toString(Long.valueOf(valuesSplit[i]) / 2)).append(" ");
            }
        } else {
            for (String filePath : COLOR_FILE) {
                values.append(Long.toString(Long.valueOf(
                        FileUtils.readOneLine(filePath)) / 2)).append(" ");
            }
        }
        return values.toString();
    }

    public static boolean setColors(String colors) {
        String[] valuesSplit = colors.split(" ");
        if (new File(COLOR_FILE_V2).exists()) {
            StringBuilder realColors = new StringBuilder();
            for (int i = 0; i < valuesSplit.length; i++) {
                realColors.append(Long.toString(Long.valueOf(valuesSplit[i]) * 2)).append(" ");
            }
            return FileUtils.writeLine(COLOR_FILE_V2, realColors.toString());
        } else {
            boolean result = true;
            for (int i = 0; i < valuesSplit.length; i++) {
                String targetFile = COLOR_FILE[i];
                result &= FileUtils.writeLine(targetFile, Long.toString(
                        Long.valueOf(valuesSplit[i]) * 2));
            }
            return result;
        }
    }
}