package com.lexicalscope.jewel.cli;

import static com.lexicalscope.jewel.cli.parser.DefaultArgumentParserFactory.createDefaultArgumentParser;
import static com.lexicalscope.jewel.cli.validation.DefaultValidatorFactory.createDefaultValidator;

import com.lexicalscope.fluentreflection.FluentClass;
import com.lexicalscope.jewel.cli.specification.CliSpecification;
import com.lexicalscope.jewel.cli.specification.OptionsSpecification;

/*
 * Copyright 2011 Tim Wood
 *
 * Licensed 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.
 */

abstract class AbstractCliImpl<O> implements Cli<O> {
    private final FluentClass<O> klass;
    private final OptionsSpecification<O> optionsSpecification;

    public AbstractCliImpl(
            final FluentClass<O> klass,
            final OptionsSpecification<O> optionsSpecification) {
        this.klass = klass;
        this.optionsSpecification = optionsSpecification;
    }

    @Override public O parseArguments(final String... arguments) throws ArgumentValidationException {
        final ArgumentCollectionBuilder parsedArguments = new ArgumentCollectionBuilder();

        createDefaultArgumentParser().parseArguments(parsedArguments, arguments);

        return argumentPresenter(klass, optionsSpecification).presentArguments(parsedArguments.processArguments(createDefaultValidator(optionsSpecification)));
    }

    protected abstract ArgumentPresenterImpl<O> argumentPresenter(
            FluentClass<O> klass,
            OptionsSpecification<O> specification);

    @Override public String getHelpMessage() {
        return optionsSpecification.toString();
    }

    CliSpecification getSpecification() {
        return optionsSpecification;
    }

    @Override public void describeTo(final HelpMessage helpMessage) {
        optionsSpecification.describeTo(helpMessage);
    }
}