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/*
 *
 *  *  Copyright 2010-2016 OrientDB LTD (http://orientdb.com)
 *  *
 *  *  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.
 *  *
 *  * For more information: http://orientdb.com
 *
 */

package com.orientechnologies.orient.output;

import java.io.OutputStream;
import java.io.PrintStream;

/**
 * It contains and manages an OutputStream at different and desired levels. The default OutputStream
 * is 'System.out', but it's possible to instantiate the class with a specific one by passing it to
 * the class Constructor. Levels: - 0 : no output - 3 : only error level is printed - 2 : from info
 * to error is printed - 1 : from debug to error is printed
 *
 * @author Gabriele Ponzi
 * @email gabriele.ponzi--at--gmail.com
 */
public class OOutputStreamManager {

  public PrintStream outputStream;
  private int level;
  public static final int BLANK_LEVEL = 0;
  public static final int DEBUG_LEVEL = 1;
  public static final int INFO_LEVEL = 2;
  public static final int WARNING_LEVEL = 3;
  public static final int ERROR_LEVEL = 4;

  public OOutputStreamManager(int level) {
    this.outputStream = System.out;
    this.level = level;
  }

  public OOutputStreamManager(PrintStream outputStream, int level) {
    this.outputStream = outputStream;
    this.level = level;
  }

  public OutputStream getOutputStream() {
    return outputStream;
  }

  public synchronized int getLevel() {
    return level;
  }

  public synchronized void setLevel(int level) {
    this.level = level;
  }

  public synchronized void debug(String message) {
    if (!(this.level == BLANK_LEVEL) && message != null) {
      if (this.level <= DEBUG_LEVEL) this.outputStream.print(message);
    }
  }

  public synchronized void debug(String format, Object... args) {
    if (!(this.level == BLANK_LEVEL) && format != null) {
      if (this.level <= DEBUG_LEVEL) this.outputStream.printf(format, args);
    }
  }

  public synchronized void info(String message) {
    if (!(this.level == BLANK_LEVEL) && message != null) {
      if (this.level <= INFO_LEVEL) this.outputStream.print(message);
    }
  }

  public synchronized void info(String format, Object... args) {
    if (!(this.level == BLANK_LEVEL) && format != null) {
      if (this.level <= INFO_LEVEL) this.outputStream.printf(format, args);
    }
  }

  public synchronized void warn(String message) {
    if (!(this.level == BLANK_LEVEL) && message != null) {
      if (this.level <= WARNING_LEVEL) this.outputStream.print(message);
    }
  }

  public synchronized void warn(String format, Object... args) {
    if (!(this.level == BLANK_LEVEL) && format != null) {
      if (this.level <= WARNING_LEVEL) this.outputStream.printf(format, args);
    }
  }

  public synchronized void error(String message) {
    if (!(this.level == BLANK_LEVEL) && message != null) {
      if (this.level <= ERROR_LEVEL) this.outputStream.print("\nERROR: " + message);
    }
  }

  public synchronized void error(String format, Object... args) {
    if (!(this.level == BLANK_LEVEL) && format != null) {
      if (this.level <= ERROR_LEVEL) this.outputStream.printf("\nERROR: " + format, args);
    }
  }
}