/*
 This file is part of the OdinMS Maple Story Server
 Copyright (C) 2008 ~ 2010 Patrick Huy <patrick.huy@frz.cc> 
 Matthias Butz <matze@odinms.de>
 Jan Christian Meyer <vimes@odinms.de>

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License version 3
 as published by the Free Software Foundation. You may not use, modify
 or distribute this program under any other version of the
 GNU Affero General Public License.

 This program 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 Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package handling;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Properties;

import tools.HexTool;

public class ExternalCodeTableGetter {

    final Properties props;

    public ExternalCodeTableGetter(Properties properties) {
        props = properties;
    }

    private static <T extends Enum<? extends WritableIntValueHolder> & WritableIntValueHolder> T valueOf(final String name, T[] values) {
        for (T val : values) {
            if (val.name().equals(name)) {
                return val;
            }
        }
        return null;
    }

    private <T extends Enum<? extends WritableIntValueHolder> & WritableIntValueHolder> short getValue(final String name, T[] values, final short def) {
        String prop = props.getProperty(name);
        if (prop != null && prop.length() > 0) {
            String trimmed = prop.trim();
            String[] args = trimmed.split(" ");
            int base = 0;
            String offset;
            if (args.length == 2) {
                base = valueOf(args[0], values).getValue();
                if (base == def) {
                    base = getValue(args[0], values, def);
                }
                offset = args[1];
            } else {
                offset = args[0];
            }
            if (offset.length() > 2 && offset.substring(0, 2).equals("0x")) {
                return (short) (Short.parseShort(offset.substring(2), 16) + base);
            } else {
                return (short) (Short.parseShort(offset) + base);
            }
        }
        return def;
    }

    public final static <T extends Enum<? extends WritableIntValueHolder> & WritableIntValueHolder> String getOpcodeTable(T[] enumeration) {
        StringBuilder enumVals = new StringBuilder();
        List<T> all = new ArrayList<>(); // need a mutable list plawks
        all.addAll(Arrays.asList(enumeration));
        Collections.sort(all, new Comparator<WritableIntValueHolder>() {

            @Override
            public int compare(WritableIntValueHolder o1, WritableIntValueHolder o2) {
                return Short.valueOf(o1.getValue()).compareTo(o2.getValue());
            }
        });
        for (T code : all) {
            enumVals.append(code.name());
            enumVals.append(" = ");
            enumVals.append("0x");
            enumVals.append(HexTool.toString(code.getValue()));
            enumVals.append(" (");
            enumVals.append(code.getValue());
            enumVals.append(")\n");
        }
        return enumVals.toString();
    }

    public final static <T extends Enum<? extends WritableIntValueHolder> & WritableIntValueHolder> void populateValues(Properties properties, T[] values) {
        ExternalCodeTableGetter exc = new ExternalCodeTableGetter(properties);
        for (T code : values) {
            code.setValue(exc.getValue(code.name(), values, (short) -2));
        }

//		if (log.isTraceEnabled()) { // generics - copy pasted between send and recv current?
//			log.trace(getOpcodeTable(values));
//		}
    }
}