/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2016, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.as.cli.handlers;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.jboss.as.cli.CommandArgument;
import org.jboss.as.cli.CommandContext;
import org.jboss.as.cli.CommandFormatException;
import org.jboss.as.cli.CommandHandler;


/**
 *
 * @author Alexey Loubyansky
 */
public abstract class CommandHandlerWithArguments implements CommandHandler {

    private int maxArgumentIndex = -1;
    private Map<String, CommandArgument> args = Collections.emptyMap();
    private List<CommandArgument> argList = Collections.emptyList();

    public void addArgument(CommandArgument arg) {
        if(arg.getIndex() > -1) {
            maxArgumentIndex = arg.getIndex() > maxArgumentIndex ? arg.getIndex() : maxArgumentIndex;
        }

        if(arg.getFullName() == null) {
            throw new IllegalArgumentException("Full name can't be null");
        }

        switch(argList.size()) {
            case 0:
                argList = Collections.singletonList(arg);
                args = new HashMap<String, CommandArgument>();
                break;
            case 1:
                CommandArgument tmp = argList.get(0);
                argList = new ArrayList<CommandArgument>();
                argList.add(tmp);
            default:
                argList.add(arg);
        }

        args.put(arg.getFullName(), arg);
        if(arg.getShortName() != null) {
            args.put(arg.getShortName(), arg);
        }
    }

    @Override
    public CommandArgument getArgument(CommandContext ctx, String name) {
        return args.get(name);
    }

    @Override
    public boolean hasArgument(CommandContext ctx, String name) {
        return args.containsKey(name);
    }

    @Override
    public boolean hasArgument(CommandContext ctx, int index) {
        //return index <= maxArgumentIndex;
        throw new UnsupportedOperationException("not used yet");
    }

    @Override
    public Collection<CommandArgument> getArguments(CommandContext ctx) {
        return argList;
    }

    protected void recognizeArguments(CommandContext ctx) throws CommandFormatException {
        final Set<String> specifiedNames = ctx.getParsedCommandLine().getPropertyNames();
        Map<String, CommandArgument> argsMap = getArgumentsMap(ctx);
        if (!argsMap.keySet().containsAll(specifiedNames)) {
            Collection<String> unrecognized = new HashSet<String>(specifiedNames);
            unrecognized.removeAll(argsMap.keySet());
            throw new CommandFormatException("Unrecognized arguments: " + unrecognized);
        }
        if(ctx.getParsedCommandLine().getOtherProperties().size() -1 > this.maxArgumentIndex) {
            throw new CommandFormatException("The command accepts " + (this.maxArgumentIndex + 1) + " unnamed argument(s) but received: "
                    + ctx.getParsedCommandLine().getOtherProperties());
        }
    }

    protected Map<String, CommandArgument> getArgumentsMap(CommandContext ctx) {
        return args;
    }
}
