/*
 *
 *  * ============LICENSE_START=======================================================
 *  *  org.onap.dcae
 *  *  ================================================================================
 *  *  Copyright (c) 2020  AT&T Intellectual Property. All rights reserved.
 *  *  ================================================================================
 *  *  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.
 *  *  ============LICENSE_END=========================================================
 *
 *
 */

package org.onap.blueprintgenerator.service.common;

import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.ParseException;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.CommandLine;
import org.onap.blueprintgenerator.model.common.Input;

import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import static java.lang.System.exit;

/**
 * @author : Ravi Mantena
 * @date 10/16/2020 Application: ONAP - Blueprint Generator Common ONAP Service used by ONAP and
 * DMAAP Blueprint to Print Instructions and Parse Inputs
 */
@Service("onapCommonUtilsService")
public class CommonUtils {

    /**
     * Prints input arguments options to run the Blueprint Application
     */
    public void printInstructions() {
        System.out.println("OPTIONS:");
        System.out.println(
            "-i OR --component-spec: The path of the ONAP Blueprint INPUT JSON SPEC FILE (Required)");
        System.out.println(
            "-p OR --blueprint-path: The path of the ONAP Blueprint OUTPUT where it will be saved (Required)");
        System.out.println(
            "-n OR --blueprint-name: The NAME of the ONAP Blueprint OUTPUT that will be created (Optional)");
        System.out
            .println("-t OR --imports: The path of the ONAP Blueprint IMPORT FILE (Optional)");
        System.out.println(
            "-o OR --service-name-override: The Value used to OVERRIDE the SERVICE NAME of the ONAP Blueprint  (Optional)");
        System.out.println(
            "-d OR --dmaap-plugin: The option to create a ONAP Blueprint with DMAAP Plugin (Optional)");
        System.out.println(
            "Syntax to run from command line: \n          For Blueprint : java -jar target/<JAR Filename>.jar app ONAP -i componentspec -p OutputBlueprintPath  -n Blueprintname -d \n          For PolicyCreate: java -jar target/<JAR Filename>.jar app ONAP -type policycreate -i componentspec -p OutputPolicyPath");
    }

    /**
     * Parses Input Arguments and validates is reuired arguments are provided or not
     *
     * @param args Input Arguments
     * @return
     */
    public Input parseInputs(String[] args) {
        String[] modArgs = new String[args.length];
        for (int i = 0; i < args.length; i++) {
            if (args[i].contains("--component-spec")) {
                modArgs[i] = "-_component_spec";
            } else if (args[i].contains("--blueprint-path")) {
                modArgs[i] = "-_blueprint_path";
            } else if (args[i].contains("--blueprint-name")) {
                modArgs[i] = "-_blueprint_name";
            } else if (args[i].contains("--imports")) {
                modArgs[i] = "-_imports";
            } else if (args[i].contains("--service-name-override")) {
                modArgs[i] = "-_service_name_override";
            } else if (args[i].contains("--dmaap-plugin")) {
                modArgs[i] = "-_dmaap_plugin";
            } else {
                modArgs[i] = args[i];
            }
        }

        StringBuilder commandsBuf = new StringBuilder("");
        String sep = "";
        for (String s : modArgs) {
            commandsBuf.append(sep).append(s);
            sep = " ";
        }
        String commands = commandsBuf.toString();

        // checks if the required inputs are present or not
        if (!(commands.contains(" -i ") || commands.contains(" -_component_spec "))
            && !(commands.contains(" -p ") || commands.contains(" -_blueprint_path "))) {
            System.out.println(
                "\n Please enter the ONAP Blueprint required inputs for: \n         -i (The path of the ONAP Blueprint INPUT JSON SPEC FILE), \n         -p (The path of the ONAP Blueprint OUTPUT where it will be saved)");
            exit(-1);
        }

        CommandLineParser parser = new DefaultParser();
        HelpFormatter formatter = new HelpFormatter();

        Options options = new Options();

        options.addOption("i", "Spec", true, "ComponentSpec Input File of the ONAP Blueprint");
        options.addOption(
            "_component_spec", "Spec", true, "ComponentSpec Input File of the ONAP Blueprint");
        options.addOption("p", "Path", true, "Path of the ONAP Blueprint OUTPUT");
        options.addOption("_blueprint_path", "Path", true, "Path of the ONAP Blueprint OUTPUT");
        options.addOption("n", "name", true, "NAME of the ONAP Blueprint OUTPUT");
        options.addOption("_blueprint_name", "name", true, "NAME of the ONAP Blueprint OUTPUT");
        options.addOption("t", "Import File", true, "Import file for the OUTPUT Blueprint Imports");
        options.addOption(
            "_imports", "Import File", true, "Import file for the OUTPUT Blueprint Imports");
        options.addOption(
            "o",
            "Service name Override",
            true,
            "Value used to override the OUTPUT Blueprint service name");
        options.addOption(
            "_service_name_override",
            "Service name Override",
            true,
            "Value used to override the OUTPUT Blueprint service name");
        options.addOption(
            "d",
            "Dmaap Plugin",
            false,
            "Flag used to indicate ONAP Blueprint OUTPUT uses the DMaaP plugin");
        options.addOption(
            "_dmaap_plugin",
            "Dmaap Plugin",
            false,
            "Flag used to indicate ONAP Blueprint OUTPUT uses the DMaaP plugin");

        Input input = new Input();
        try {
            CommandLine commandLine = parser.parse(options, modArgs);
            input.setComponentSpecPath(
                commandLine.getOptionValue("i") == null
                    ? commandLine.getOptionValue("_component_spec")
                    : commandLine.getOptionValue("i"));
            input.setOutputPath(
                commandLine.getOptionValue("p") == null
                    ? commandLine.getOptionValue("_blueprint_path")
                    : commandLine.getOptionValue("p"));
            input.setBluePrintName(
                commandLine.getOptionValue("n") == null
                    ? commandLine.getOptionValue("_blueprint_name")
                    : commandLine.getOptionValue("n"));
            input.setImportPath(
                commandLine.getOptionValue("t") == null
                    ? commandLine.getOptionValue("_imports")
                    : commandLine.getOptionValue("t"));
            input.setBpType(
                (commands.contains(" -d ") || commands.contains(" -_dmaap_plugin ")) ? "d" : "o");
            input.setServiceNameOverride(
                commandLine.getOptionValue("o") == null
                    ? commandLine.getOptionValue("_service_name_override") == null
                    ? ""
                    : commandLine.getOptionValue("_service_name_override")
                    : commandLine.getOptionValue("o"));
        } catch (ParseException ex) {
            ex.printStackTrace();
            System.out.println(ex.getMessage());
            formatter.printHelp(
                "Required/Valid Inputs to create ONAP Blueprint are not provided", options);
            exit(-1);
        }
        if (StringUtils.isEmpty(input.getComponentSpecPath())) {
            System.out
                .println("The path of the ONAP Blueprint INPUT JSON SPEC FILE  is not specified");
            exit(-1);
        }
        if (StringUtils.isEmpty(input.getOutputPath())) {
            System.out.println(
                "The path of the ONAP Blueprint OUTPUT where it will be saved is not specified");
            exit(-1);
        }
        if (commands.contains(" -n ") || commands.contains(" -_blueprint_name ")) {
            if (StringUtils.isEmpty(input.getBluePrintName())) {
                System.out.println(
                    "The NAME of the ONAP Blueprint OUTPUT that will be created is not specified");
                exit(-1);
            }
        }
        if (commands.contains(" -t ") || commands.contains(" -_imports ")) {
            if (StringUtils.isEmpty(input.getImportPath())) {
                System.out.println("The path of the ONAP Blueprint Imports File is not specified");
                exit(-1);
            }
        }

        return input;
    }
}