/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.sysds.utils;

public class DMLCompressionStatistics {

	private static double Phase0 = 0.0;
	private static double Phase1 = 0.0;
	private static double Phase2 = 0.0;
	private static double Phase3 = 0.0;
	private static double Phase4 = 0.0;
	private static double Phase5 = 0.0;

	private static int DecompressSTCount = 0;
	private static double DecompressST = 0.0;
	private static int DecompressMTCount = 0;
	private static double DecompressMT = 0.0;

	private static int DecompressToSTCount = 0;
	private static double DecompressToST = 0.0;
	private static int DecompressToMTCount = 0;
	private static double DecompressToMT = 0.0;

	private static int DecompressSparkCount = 0;
	private static int DecompressCacheCount = 0;

	public static void reset() {
		Phase0 = 0.0;
		Phase1 = 0.0;
		Phase2 = 0.0;
		Phase3 = 0.0;
		Phase4 = 0.0;
		Phase5 = 0.0;
		DecompressSTCount = 0;
		DecompressST = 0.0;
		DecompressMTCount = 0;
		DecompressMT = 0.0;
		DecompressToSTCount = 0;
		DecompressToST = 0.0;
		DecompressToMTCount = 0;
		DecompressToMT = 0.0;
		DecompressSparkCount = 0;
		DecompressCacheCount = 0;
	}

	public static boolean haveCompressed() {
		return Phase0 > 0;
	}

	public static void addCompressionTime(double time, int phase) {
		switch(phase) {
			case 0:
				Phase0 += time;
				break;
			case 1:
				Phase1 += time;
				break;
			case 2:
				Phase2 += time;
				break;
			case 3:
				Phase3 += time;
				break;
			case 4:
				Phase4 += time;
				break;
			case 5:
				Phase5 += time;
				break;
		}
	}

	public static void addDecompressTime(double time, int threads) {
		if(threads == 1) {
			DecompressSTCount++;
			DecompressST += time;
		}
		else {
			DecompressMTCount++;
			DecompressMT += time;
		}
	}

	public static void addDecompressToBlockTime(double time, int threads) {
		if(threads == 1) {
			DecompressToSTCount++;
			DecompressToST += time;
		}
		else {
			DecompressToMTCount++;
			DecompressToMT += time;
		}
	}

	public static void addDecompressSparkCount() {
		DecompressSTCount++;
	}

	public static void addDecompressCacheCount() {
		DecompressCacheCount++;
	}

	public static int getDecompressionCount() {
		return DecompressMTCount + DecompressSTCount + DecompressSparkCount + DecompressCacheCount + DecompressToSTCount +
			DecompressToMTCount;
	}

	public static void display(StringBuilder sb) {
		if(haveCompressed()) { // If compression have been used
			sb.append(String.format("CLA Compression Phases :\t%.3f/%.3f/%.3f/%.3f/%.3f/%.3f\n", Phase0 / 1000,
				Phase1 / 1000, Phase2 / 1000, Phase3 / 1000, Phase4 / 1000, Phase5 / 1000));
			sb.append(String.format("Decompression with allocation (Single, Multi, Spark, Cache) : %d/%d/%d/%d\n",
				DecompressSTCount, DecompressMTCount, DecompressSparkCount, DecompressCacheCount));
			sb.append(String.format("Decompression with allocation Time (Single , Multi)         : %.3f/%.3f sec.\n",
				DecompressST / 1000, DecompressMT / 1000));
			sb.append(String.format("Decompression to block (Single, Multi)                      : %d/%d\n",
				DecompressToSTCount, DecompressToMTCount));
			sb.append(String.format("Decompression to block Time (Single, Multi)                 : %.3f/%.3f sec.\n",
				DecompressToST / 1000, DecompressToMT / 1000));
		}
	}
}
