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/**
 * Copyright 2005-2015 Red Hat, Inc.
 * 
 * Red Hat 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 io.fabric8.forge.camel.commands.project;

import java.util.Arrays;
import java.util.concurrent.Callable;
import javax.inject.Inject;

import com.fasterxml.jackson.core.JsonProcessingException;
import io.fabric8.forge.camel.commands.project.dto.ComponentDto;
import io.fabric8.forge.addon.utils.dto.OutputFormat;
import io.fabric8.forge.camel.commands.project.helper.CamelCommandsHelper;
import io.fabric8.forge.addon.utils.OutputFormatHelper;
import io.fabric8.utils.Strings;
import io.fabric8.utils.TablePrinter;
import org.jboss.forge.addon.projects.Project;
import org.jboss.forge.addon.ui.context.UIBuilder;
import org.jboss.forge.addon.ui.context.UIContext;
import org.jboss.forge.addon.ui.context.UIExecutionContext;
import org.jboss.forge.addon.ui.input.UIInput;
import org.jboss.forge.addon.ui.input.UISelectOne;
import org.jboss.forge.addon.ui.metadata.UICommandMetadata;
import org.jboss.forge.addon.ui.metadata.WithAttributes;
import org.jboss.forge.addon.ui.result.Result;
import org.jboss.forge.addon.ui.result.Results;
import org.jboss.forge.addon.ui.util.Categories;
import org.jboss.forge.addon.ui.util.Metadata;

public class CamelGetComponentsCommand extends AbstractCamelProjectCommand {

    @Inject
    @WithAttributes(label = "Filter", required = false, description = "To filter components")
    private UISelectOne filter;

    @Inject
    @WithAttributes(label = "Format", defaultValue = "Text", description = "Format output as text or json")
    private UISelectOne format;

    @Inject
    @WithAttributes(label = "Verbose", defaultValue = "false", description = "Whether to use verbose text output")
    private UIInput verbose;

    @Inject
    @WithAttributes(label = "Exclude Project", defaultValue = "true", description = "Whether to exclude components in the current project")
    private UIInput excludeProject;

    @Override
    public UICommandMetadata getMetadata(UIContext context) {
        return Metadata.forCommand(CamelGetComponentsCommand.class).name(
                "Camel: Get Components").category(Categories.create(CATEGORY))
                .description("Gets the components available in the camel catalog and/or in the current project");
    }

    @Override
    public boolean isEnabled(UIContext context) {
        boolean answer = super.isEnabled(context);
        if (answer) {
            // we should only be enabled in non gui
            boolean gui = isRunningInGui(context);
            answer = !gui;
        }
        return answer;
    }

    @Override
    public void initializeUI(UIBuilder builder) throws Exception {
        Project project = getSelectedProject(builder);

        filter.setValueChoices(CamelCommandsHelper.createComponentLabelValues(project, getCamelCatalog()));
        filter.setDefaultValue("");

        builder.add(filter).add(format).add(verbose).add(excludeProject);
    }

    @Override
    public Result execute(UIExecutionContext context) throws Exception {
        Project project = getSelectedProject(context);
        boolean excludeProjectComponents = isValueTrue(excludeProject);
        Callable> callable = CamelCommandsHelper.createAllComponentDtoValues(project, getCamelCatalog(), filter, excludeProjectComponents);
        Iterable results = callable.call();
        String result = formatResult(results);
        return Results.success(result);
    }

    protected String formatResult(Iterable results) throws JsonProcessingException {
        OutputFormat outputFormat = format.getValue();
        switch (outputFormat) {
            case JSON:
                return OutputFormatHelper.toJson(results);
            default:
                return textResult(results);
        }
    }

    protected String textResult(Iterable components) {
        StringBuilder buffer = new StringBuilder();

        TablePrinter table = new TablePrinter();

        if (isValueTrue(this.verbose)) {
            table.columns("name", "description", "tags", "syntax", "artifact");
            for (ComponentDto component : components) {
                String tags = "";
                String[] tagArray = component.getTags();
                if (tagArray != null) {
                    tags = Strings.join(Arrays.asList(tagArray), ", ");
                }
                table.row(component.getScheme(), component.getDescription(), tags, component.getSyntax(),
                        component.getGroupId() + ":" + component.getArtifactId() + ":" + component.getVersion());
            }
        } else {
            table.columns("name", "description");
            for (ComponentDto component : components) {
                table.row(component.getScheme(), component.getDescription());
            }
        }
        OutputFormatHelper.addTableTextOutput(buffer, "Components", table);
        return buffer.toString();
    }

    protected static boolean isValueTrue(UIInput value) {
        Boolean verboseValue = value.getValue();
        return verboseValue != null && verboseValue;
    }

}