/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * 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=========================================================
 */

package org.openecomp.aai.restcore.util;

import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;

import java.io.*;
import java.util.*;

public class GenerateEdgeRules {

    private static final EELFLogger LOG = EELFManager.getInstance().getLogger(GenerateEdgeRules.class);

    public static void main(String[] args) throws IOException, TemplateException {

        String filename = "/AAI8032.csv";
        InputStream inputStream = GenerateEdgeRules.class.getResourceAsStream(filename);
        Map<String, Integer> headers = new HashMap<>();
        Map<String, Object> edgeRulesMap = new TreeMap<String, Object>();
        List<Map<String, String>> edgeRules = new ArrayList<>();

        try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {

            String line = null;

            int rowNum = 0;

            // Retrieve the header line to map the indexes to their column names

            while ((line = reader.readLine()) != null) {

                if (rowNum == 0) {
                    headers = retrieveHeaderMap(line);
                } else {
                    String[] columns = line.split(",");

                    String originalNode = columns[headers.get("Orig NodeA|NodeB")];
                    String finalNode = columns[headers.get("Final NodeA|NodeB")];
                    String originalEdge = columns[headers.get("Orig EdgeLabel")];
                    String finalEdge = columns[headers.get("Final EdgeLabel")];

                    String lineage = columns[headers.get("Final Lineage")];
                    String originalParent = columns[headers.get("Orig ParentOf")];
                    String usesResource = columns[headers.get("Revised UsesResource")];
                    String hasDelTarget = columns[headers.get("Revised hasDelTarget")];
                    String svcInfra = columns[headers.get("Final SVC-INFRA")];
                    String svcInfraRev = "";

                    if(usesResource.equals("T"))
                        usesResource = "true";
                    else if(usesResource.equals("F"))
                        usesResource = "false";

                    if (hasDelTarget.equals("T") || hasDelTarget.equals("AB")) {
                        hasDelTarget = "true";
                    } else if (hasDelTarget.equals("F")) {
                        hasDelTarget = "false";
                    }

                    if (svcInfra.equals("T")) {
                        svcInfra = "true";
                    } else if (svcInfra.equals("F")) {
                        svcInfra = "false";
                    } else if (svcInfra.equals("R")) {
                        svcInfra = "reverse";
                    }

                    if (originalParent.equals("T")) {
                        if (lineage.trim().equalsIgnoreCase("CHILD")) {
                            lineage = "true";
                        } else if (lineage.trim().equalsIgnoreCase("PARENT")) {
                            lineage = "reverse";
                        }
                    } else {
                        lineage = "false";
                    }

                    Map<String, String> edgeMap = new HashMap<String, String>();

                    edgeMap.put("lineage", lineage);
                    edgeMap.put("usesResource", usesResource);
                    edgeMap.put("hasDelTarget", hasDelTarget);
                    edgeMap.put("SVC-INFRA", svcInfra);
                    edgeMap.put("SVC-INFRA-REV", svcInfraRev);
                    edgeMap.put("nodes", finalNode);
                    edgeMap.put("edge", finalEdge);
                    edgeMap.put("direction", columns[headers.get("Orig Direction")]);
                    edgeMap.put("multiplicity", columns[headers.get("Revised Multiplicity")]);

                    edgeRules.add(edgeMap);

                }
                ++rowNum;
            }
        } catch(Exception ex){
            ex.printStackTrace();
        }

        edgeRulesMap.put("edgeRules", edgeRules);

        Collections.sort(edgeRules, new Comparator<Map<String, String>>() {
            @Override
            public int compare(Map<String, String> o1, Map<String, String> o2) {
                return o1.get("nodes").compareTo(o2.get("nodes"));
            }
        });

        Configuration configuration = new Configuration();
        Template template = configuration.getTemplate("ajsc-aai/src/main/resources/EdgeRules.ftl");
        Writer file = new FileWriter(new File("ajsc-aai/src/main/resources" + "/" + "EdgeRules.txt"));
        template.process(edgeRulesMap, file);
    }

    private static Map<String, Integer> retrieveHeaderMap(String line){

        if(line == null)
            throw new NullPointerException();

        String[] columnNames = line.split(",");

        Map<String, Integer> map = new HashMap<String, Integer>();

        int index = 0;

        for(String columnName : columnNames){
            map.put(columnName, index++);
        }

        return map;
    }

}