/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 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=========================================================
 * Modifications copyright (c) 2019 Nokia
 * ================================================================================
 */
package org.openecomp.sdc.asdctool.main;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import org.openecomp.sdc.asdctool.impl.GraphJsonValidator;
import org.openecomp.sdc.asdctool.impl.GraphMLConverter;
import org.openecomp.sdc.asdctool.impl.GraphMLDataAnalyzer;

public class ExportImportMenu {

    public static void main(String[] args) throws Exception {
        ExportImportEnum type;
        if (args == null || args.length < 1) {
            type = ExportImportEnum.NONE;
        } else {
            type = ExportImportEnum.getByKeyword(getOperation(args).toLowerCase());
        }
        type.handle(args);
    }

    private static String getOperation(String[] args) {
        String operation = null;
        if (args != null) {
            operation = args[0];
        }
        return operation;
    }

    enum ExportImportEnum {
        DATA_REPORT("Usage: get-data-report-from-graph-ml <full path of .graphml file>", "get-data-report-from-graph-ml") {
            @Override
            void handle(String[] args) {
                if (verifyParamsLength(args, 2)) {
                    usage();
                    System.exit(1);
                }
                String[] dataArgs = new String[]{args[1]};
                if (new GraphMLDataAnalyzer().analyzeGraphMLData(dataArgs) == null) {
                    System.exit(2);
                }
            }
        }, EXPORT("Usage: export <janusgraph.properties> <output directory>", "export") {
            @Override
            void handle(String[] args) {
                if (verifyParamsLength(args, 3)) {
                    usage();
                    System.exit(1);
                }
                if (!GRAPH_ML_CONVERTER.exportGraph(args)) {
                    System.exit(2);
                }
            }
        }, EXPORT_AS_GRAPH("Usage: export-as-graph-ml <janusgraph.properties> <output directory>", "export-as-graph-ml") {
            @Override
            void handle(String[] args) {
                if (verifyParamsLength(args, 3)) {
                    usage();
                    System.exit(1);
                }
                if (GRAPH_ML_CONVERTER.exportGraphMl(args) == null) {
                    System.exit(2);
                }
            }
        }, EXPORT_USERS("Usage: exportusers <janusgraph.properties> <output directory>", "exportusers") {
            @Override
            void handle(String[] args) {
                if (verifyParamsLength(args, 3)) {
                    usage();
                    System.exit(1);
                }
                if (!GRAPH_ML_CONVERTER.exportUsers(args)) {
                    System.exit(2);
                }
            }
        }, EXPORT_WITH_REPORT("Usage: export-as-graph-ml-with-data-report <janusgraph.properties> <output directory>",
            "export-as-graph-ml-with-data-report") {
            @Override
            void handle(String[] args) {
                if (verifyParamsLength(args, 3)) {
                    usage();
                    System.exit(1);
                }
                if (GRAPH_ML_CONVERTER.exportGraphMl(args) == null) {
                    System.exit(2);
                }
                String[] dataArgs = new String[]{GRAPH_ML_CONVERTER.exportGraphMl(args)};
                if (new GraphMLDataAnalyzer().analyzeGraphMLData(dataArgs) == null) {
                    System.exit(2);
                }
            }
        }, FIND_PROBLEM("Usage: findproblem <janusgraph.properties> <graph file location>", "findproblem") {
            @Override
            void handle(String[] args) {
                if (verifyParamsLength(args, 3)) {
                    usage();
                    System.exit(1);
                }
                if (!GRAPH_ML_CONVERTER.findErrorInJsonGraph(args)) {
                    System.exit(2);
                }
            }
        }, IMPORT("Usage: import <janusgraph.properties> <graph file location>", "import") {
            @Override
            void handle(String[] args) {
                if (verifyParamsLength(args, 3)) {
                    usage();
                    System.exit(1);
                }
                if (!GRAPH_ML_CONVERTER.importGraph(args)) {
                    System.exit(2);
                }
            }
        }, VALIDATE_JSON("Usage: validate-json <export graph path>", "validate-json") {
            @Override
            void handle(String[] args) throws IOException {
                if (verifyParamsLength(args, 2)) {
                    usage();
                    System.exit(1);
                }
                String jsonFilePath = args[1];
                GraphJsonValidator graphJsonValidator = new GraphJsonValidator();
                if (graphJsonValidator.verifyJanusGraphJson(jsonFilePath)) {
                    System.exit(2);
                }
            }
        }, NONE {
            @Override
            void handle(String[] args) {
                usage();
                System.exit(1);
            }

            void usage() {
                Arrays.stream(ExportImportEnum.values()).filter(type -> type != NONE).forEach(ExportImportEnum::usage);
            }
        };
        private static final GraphMLConverter GRAPH_ML_CONVERTER = new GraphMLConverter();
        private String usage;
        private String keyword;

        ExportImportEnum(String usage, String keyword) {
            this.usage = usage;
            this.keyword = keyword;
        }

        ExportImportEnum() {
        }

        static ExportImportEnum getByKeyword(String keyword) {
            List<ExportImportEnum> collected = Arrays.stream(ExportImportEnum.values()).filter(type -> type != NONE)
                .filter(type -> type.keyword.equals(keyword)).collect(Collectors.toList());
            return collected.isEmpty() ? NONE : collected.get(0);
        }

        private static boolean verifyParamsLength(String[] args, int i) {
            if (args == null) {
                return i > 0;
            }
            return args.length < i;
        }

        void usage() {
            System.out.println(usage);
        }

        abstract void handle(String[] args) throws IOException;
    }
}