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/*
 * Copyright 2019 the original author or authors.
 *
 * Licensed under the Apache, 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.gnu.org/licenses/lgpl-3.0.html
 *
 * 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 net.minidev.json;

import net.minidev.json.JStylerObj.MustProtect;
import net.minidev.json.JStylerObj.StringProtector;

import java.io.IOException;

/**
 * JSONStyle object configure JSonSerializer reducing output size
 *
 * @author Uriel Chemouni <[email protected]>
 */
public class JSONStyle {
    /**
     * for advanced usage sample see
     * 
     * #see net.minidev.json.test.TestCompressorFlags
     */
    public final static int FLAG_PROTECT_KEYS = 1;
    public final static int FLAG_PROTECT_4WEB = 2;
    public final static int FLAG_PROTECT_VALUES = 4;
    /**
     * AGRESSIVE have no effect without PROTECT_KEYS or PROTECT_VALUE
     * 
     * AGRESSIVE mode allows Json-smart to not protect String containing
     * special chars
     */
    public final static int FLAG_AGRESSIVE = 8;
    /**
     * @since 2.1
     */
    public final static int FLAG_IGNORE_NULL = 16;

    public final static JSONStyle NO_COMPRESS = new JSONStyle(0);
    public final static JSONStyle MAX_COMPRESS = new JSONStyle(-1);
    /**
     * @since 1.0.9.1
     */
    public final static JSONStyle LT_COMPRESS = new JSONStyle(FLAG_PROTECT_4WEB);

    private boolean _protectKeys;
    private boolean _protect4Web;
    private boolean _protectValues;
    private boolean _ignore_null;

    private MustProtect mpKey;
    private MustProtect mpValue;

    private StringProtector esc;

    public JSONStyle(int FLAG) {
        _protectKeys = (FLAG & FLAG_PROTECT_KEYS) == 0;
        _protectValues = (FLAG & FLAG_PROTECT_VALUES) == 0;
        _protect4Web = (FLAG & FLAG_PROTECT_4WEB) == 0;
        _ignore_null = (FLAG & FLAG_IGNORE_NULL) > 0;

        MustProtect mp;
        if ((FLAG & FLAG_AGRESSIVE) > 0) {
            mp = JStylerObj.MP_AGGRESIVE;
        } else {
            mp = JStylerObj.MP_SIMPLE;
        }

        if (_protectValues) {
            mpValue = JStylerObj.MP_TRUE;
        } else {
            mpValue = mp;
        }

        if (_protectKeys) {
            mpKey = JStylerObj.MP_TRUE;
        } else {
            mpKey = mp;
        }

        if (_protect4Web) {
            esc = JStylerObj.ESCAPE4Web;
        } else {
            esc = JStylerObj.ESCAPE_LT;
        }
    }

    public JSONStyle() {
        this(0);
    }

    public boolean protectKeys() {
        return _protectKeys;
    }

    public boolean protectValues() {
        return _protectValues;
    }

    public boolean protect4Web() {
        return _protect4Web;
    }

    public boolean ignoreNull() {
        return _ignore_null;
    }

    public boolean indent() {
        return false;
    }

    public boolean mustProtectKey(String s) {
        return mpKey.mustBeProtect(s);
    }

    public boolean mustProtectValue(String s) {
        return mpValue.mustBeProtect(s);
    }

    public void writeString(Appendable out, String value) throws IOException {
        if (!this.mustProtectValue(value)) {
            out.append(value);
        } else {
            out.append('"');
            JSONValue.escape(value, out, this);
            out.append('"');
        }
    }

    public void escape(String s, Appendable out) {
        esc.escape(s, out);
    }

    /**
     * begin Object
     */
    public void objectStart(Appendable out) throws IOException {
        out.append('{');
    }

    /**
     * terminate Object
     */
    public void objectStop(Appendable out) throws IOException {
        out.append('}');
    }

    /**
     * Start the first Obeject element
     */
    public void objectFirstStart(Appendable out) throws IOException {
    }

    /**
     * Start a new Object element
     */
    public void objectNext(Appendable out) throws IOException {
        out.append(',');
    }

    /**
     * End Of Object element
     */
    public void objectElmStop(Appendable out) throws IOException {
    }

    /**
     * end of Key in json Object
     */
    public void objectEndOfKey(Appendable out) throws IOException {
        out.append(':');
    }

    /**
     * Array start
     */
    public void arrayStart(Appendable out) throws IOException {
        out.append('[');
    }

    /**
     * Array Done
     */
    public void arrayStop(Appendable out) throws IOException {
        out.append(']');
    }

    /**
     * Start the first Array element
     */
    public void arrayfirstObject(Appendable out) throws IOException {
    }

    /**
     * Start a new Array element
     */
    public void arrayNextElm(Appendable out) throws IOException {
        out.append(',');
    }

    /**
     * End of an Array element
     */
    public void arrayObjectEnd(Appendable out) throws IOException {
    }
}