/*
 * 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.ws.java2wsdl.utils;

import org.apache.axis2.description.java2wsdl.Java2WSDLConstants;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Java2WSDLCommandLineOptionParser implements Java2WSDLConstants {
    private static int STARTED = 0;
    private static int NEW_OPTION = 1;
    private static int SUB_PARAM_OF_OPTION = 2;

    private Map<String,Java2WSDLCommandLineOption> commandLineOptions;

    public Java2WSDLCommandLineOptionParser(Map<String,Java2WSDLCommandLineOption> commandLineOptions) {
        this.commandLineOptions = commandLineOptions;
    }

    public Java2WSDLCommandLineOptionParser(String[] args) {
        this.commandLineOptions = this.parse(args);

    }

    /**
     * Return a list with <code>CommandLineOption</code> objects
     *
     * @param args
     * @return CommandLineOption List
     */
    private Map<String,Java2WSDLCommandLineOption> parse(String[] args) {
        Map<String,Java2WSDLCommandLineOption> commandLineOptions
                = new HashMap<String,Java2WSDLCommandLineOption>();

        if (0 == args.length)
            return commandLineOptions;

        //State 0 means started
        //State 1 means earlier one was a new -option
        //State 2 means earlier one was a sub param of a -option

        int state = STARTED;
        ArrayList<String> optionBundle = null;
        String optionType = null;
        Java2WSDLCommandLineOption commandLineOption;

        for (String arg : args) {

            if (arg.startsWith("-")) {
                if (STARTED == state) {
                    // fresh one
                    state = NEW_OPTION;
                    optionType = arg;
                } else if (SUB_PARAM_OF_OPTION == state || NEW_OPTION == state) {
                    // new one but old one should be saved
                    commandLineOption =
                            new Java2WSDLCommandLineOption(optionType, optionBundle);
                    commandLineOptions.put(commandLineOption.getOptionType(),
                            commandLineOption);
                    state = NEW_OPTION;
                    optionType = arg;
                    optionBundle = null;
                }
            } else {
                if (STARTED == state) {
                    commandLineOption =
                            new Java2WSDLCommandLineOption(
                                    SOLE_INPUT,
                                    args);
                    commandLineOptions.put(commandLineOption.getOptionType(),
                            commandLineOption);
                    return commandLineOptions;

                } else if (NEW_OPTION == state) {
                    Java2WSDLCommandLineOption old = commandLineOptions.get(getOptionType(optionType));
                    if(old !=null){
                        old.getOptionValues().add(arg);
                        optionBundle = null;
                        state = STARTED;
                    } else {
                        optionBundle = new ArrayList<String>();
                        optionBundle.add(arg);
                        state = SUB_PARAM_OF_OPTION;
                    }
                } else if (SUB_PARAM_OF_OPTION == state) {
                    optionBundle.add(arg);
                }

            }


        }

        if(state != STARTED) { 
            commandLineOption = new Java2WSDLCommandLineOption(optionType, optionBundle);
            commandLineOptions.put(commandLineOption.getOptionType(), commandLineOption);
        }
        return commandLineOptions;
    }

    private String getOptionType(String type) {
        //cater for the long options first
        if (type.startsWith("--")) type = type.replaceFirst("--", "");
        if (type.startsWith("-")) type = type.replaceFirst("-", "");
        return type;
    }

    public Map<String,Java2WSDLCommandLineOption> getAllOptions() {
        return this.commandLineOptions;
    }

    public List<Java2WSDLCommandLineOption> getInvalidOptions(Java2WSDLOptionsValidator validator) {
        List<Java2WSDLCommandLineOption> faultList = new ArrayList<Java2WSDLCommandLineOption>();
        for (Java2WSDLCommandLineOption commandLineOption : commandLineOptions.values()) {
            if (validator.isInvalid(commandLineOption)) {
                faultList.add(commandLineOption);
            }
        }

        return faultList;
    }


}