/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
package org.apache.syncope.client.cli;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.lang3.tuple.Pair;
import org.apache.syncope.client.cli.commands.AbstractCommand;
import org.apache.syncope.client.cli.util.CommandUtils;

public class Input {

    public static Pair<String, String> toPairParameter(final String parameter) throws IllegalArgumentException {
        if (!parameter.contains("=")) {
            throw new IllegalArgumentException("Parameter syntax error!");
        }
        final String[] pairParameterArray = parameter.split("=");
        return Pair.of(pairParameterArray[0], pairParameterArray[1]);
    }

    private final AbstractCommand command;

    private final String[] parameters;

    private final List<String> commandFields = new ArrayList<>();

    private String option;

    public Input(final String[] args)
            throws InstantiationException, IllegalAccessException, IllegalArgumentException {

        command = CommandUtils.fromArgs(args[0]);
        commandFields.add(args[0]);

        if (args.length > 1) {
            option = args[1];
            commandFields.add(args[1]);
        }

        if (args.length > 2) {
            parameters = new String[args.length - 2];
            for (int i = 0; i < parameters.length; i++) {
                parameters[i] = args[i + 2];
                commandFields.add(parameters[i]);
            }
        } else {
            parameters = new String[0];
        }
    }

    public AbstractCommand getCommand() {
        return command;
    }

    public void setOption(final String option) {
        this.option = option;
    }

    public String getOption() {
        return option;
    }

    public String[] getParameters() {
        return parameters;
    }

    public List<String> listParameters() {
        return Arrays.asList(parameters);
    }

    public String firstParameter() {
        return parameters[0];
    }

    public String secondParameter() {
        return parameters[1];
    }

    public String thirdParameter() {
        return parameters[2];
    }

    public String lastParameter() {
        return parameters[parameters.length - 1];
    }

    public int parameterNumber() {
        return parameters.length;
    }

    public String printCommandFields() {
        final StringBuilder commandBuilder = new StringBuilder();
        for (final String commandField : commandFields) {
            commandBuilder.append(commandField).append(" ");
        }
        return commandBuilder.toString();
    }
}