/**
 * ============LICENSE_START==================================================== org.onap.aaf
 * =========================================================================== Copyright (c) 2018 AT&T Intellectual
 * Property. All rights reserved. =========================================================================== 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. ============LICENSE_END====================================================
 */

package org.onap.aaf.misc.env.util;

import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;

/**
 * @author Jonathan
 *
 *         Catch \n and indent according to current indent levels of JavaGen
 */
public class IndentPrintWriter extends PrintWriter {

    public static final int INDENT_MULTIPLIER = 2;
    private boolean addIndent;
    private int indent;
    private int col;

    public IndentPrintWriter(Writer out) {
        super(out);
        addIndent = false;
        indent = col = 0;
    }

    public IndentPrintWriter(OutputStream out) {
        super(out);
        addIndent = false;
        indent = col = 0;
    }


    @Override
    public void write(String str) {
        int len = str.length();
        for (int i = 0; i < len; ++i) {
            write((int) str.charAt(i));
        }
    }

    @Override
    public void println() {
        write((int) '\n');
    }

    @Override
    public void write(String str, int off, int len) {
        int finalLength = Math.min(str.length(), off + len);
        for (int i = off; i < finalLength; ++i) {
            write((int) str.charAt(i));
        }
    }

    @Override
    public void write(int b) {
        if (b == '\n') {
            addIndent = true;
            col = 0;
        } else if (addIndent) {
            addIndent = false;
            toIndent();
        } else {
            ++col;
        }
        super.write(b);
    }

    @Override
    public void write(char[] buf, int off, int len) {
        for (int i = 0; i < len; ++i) {
            write(buf[i] + off);
        }
    }

    public void setIndent(int size) {
        indent = size;
    }

    public void inc() {
        ++indent;
    }

    public void dec() {
        --indent;
    }

    public void toCol(int idx) {
        while (idx > col++) {
            super.write((int) ' ');
        }
    }

    public int getIndent() {
        return indent;
    }

    public void toIndent() {
        int end = indent * INDENT_MULTIPLIER;
        for (int i = 0; i < end; ++i) {
            super.write((int) ' ');
        }
        col = end;
    }
}