/*
 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.jmx.remote.rest.json;

/**
 * @author harsha
 */
public class JSONPrimitive implements JSONElement {

    private final Object value;

    public JSONPrimitive(long i) {
        value = i;
    }

    public JSONPrimitive(double i) {
        value = i;
    }

    public JSONPrimitive(Boolean i) {
        value = i;
    }

    public JSONPrimitive(String s) {
        value = s;
    }

    public static String escape(String s) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            if (ch == '\\') {
                if (i < s.length() - 1 && (s.charAt(i + 1) == '\\' || s.charAt(i + 1) == '"')) {
                    sb.append(ch).append(s.charAt(i + 1));
                    i++;
                } else {
                    sb.append("\\\\");
                }
            } else if (ch == '"') {
                sb.append("\\\"");
            } else {
                sb.append(ch);
            }
        }
        return sb.toString();
    }

    public Object getValue() {
        return value;
    }

    @Override
    public String toJsonString() {
        if (value instanceof String) {
            return "\"" + escape(value.toString()) + "\"";
        }
        return value != null ? value.toString() : null;
    }

    @Override
    public int hashCode() {
        if (value instanceof String) {
            return ((String) value).hashCode();
        } else if (value instanceof Long) {
            return ((Long) value).hashCode();
        } else if (value instanceof Double) {
            return ((Double) value).hashCode();
        } else if (value instanceof Boolean) {
            return ((Boolean) value).hashCode();
        } else {
            return super.hashCode();
        }
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }

        if (!(obj instanceof JSONPrimitive)) {
            return false;
        }

        JSONPrimitive o = (JSONPrimitive) obj;

        if (value == null && o.getValue() == null) {
            return true;
        }

        if (value != null && o.getValue() != null) {
            if (value.getClass().equals(o.getValue().getClass())) {
                return value.equals(o.getValue());
            }
        }
        return false;
    }
}