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/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * Copyright (C) 2017 Huawei Technologies Co., Ltd. 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.mso.openstack.utils;



import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import org.openecomp.mso.db.catalog.beans.HeatTemplateParam;
import org.codehaus.jackson.map.ObjectMapper;
import java.util.LinkedHashMap;

import org.yaml.snakeyaml.Yaml;

import org.openecomp.mso.logger.MsoLogger;

public class MsoYamlEditorWithEnvt {

    private static final MsoLogger LOGGER = MsoLogger.getMsoLogger (MsoLogger.Catalog.RA);
    
    private Map <String, Object> yml;
    private Yaml yaml = new Yaml ();
    private static final ObjectMapper JSON_MAPPER = new ObjectMapper();

        public MsoYamlEditorWithEnvt() {
                super();
        }
        public MsoYamlEditorWithEnvt(byte[] b) {
                init(b);
        }

    @SuppressWarnings("unchecked")
    private synchronized void init (byte[] body) {
        InputStream input = new ByteArrayInputStream (body);
        yml = (Map <String, Object>) yaml.load (input);
    }   

    @SuppressWarnings("unchecked")
        public synchronized Set <MsoHeatEnvironmentParameter> getParameterListFromEnvt() {
        // In an environment entry, the parameters section can only contain the name:value - 
        // not other attributes.
        Set <MsoHeatEnvironmentParameter> paramSet = new HashSet<MsoHeatEnvironmentParameter>();
        Map<String, Object> resourceMap = null;
        try {
                resourceMap = (Map<String,Object>) yml.get("parameters");
        } catch (Exception e) {
            LOGGER.debug("Exception:", e);
                return paramSet;
        }
        if (resourceMap == null) {
                return paramSet;
        }
        Iterator <Entry <String, Object>> it = resourceMap.entrySet().iterator();
        
        while (it.hasNext()) {
                MsoHeatEnvironmentParameter hep = new MsoHeatEnvironmentParameter();
                Map.Entry <String, Object> pair = it.next();
                //Map<String, String> resourceEntry = (Map <String, String>) pair.getValue();
                //String value = null;
                String value = null;
                Object obj = pair.getValue();
                if (obj instanceof java.lang.String) {
                        //value = (String) pair.getValue();
                        // handle block scalar - literals and folded:
                        value = yaml.dump(obj);
                        // but this adds an extra '\n' at the end - which won't hurt - but we don't need it
                        value = value.substring(0, value.length() - 1);
                } else if (obj instanceof java.util.LinkedHashMap) {
                        //Handle that it's json
                        try {
                                value = JSON_MAPPER.writeValueAsString(obj);
                        } catch (Exception e) {
                            LOGGER.debug("Exception:", e);
                                value = "_BAD_JSON_MAPPING";
                        }
                } else {
                        //this handles integers/longs/floats/etc.
                        value = String.valueOf(obj);
                }
                hep.setName((String) pair.getKey());
                hep.setValue(value);
                paramSet.add(hep);
        }
        return paramSet;
    }
    public synchronized Set <MsoHeatEnvironmentResource> getResourceListFromEnvt() {
        try {
                Set<MsoHeatEnvironmentResource> resourceList = new HashSet<>();
                @SuppressWarnings("unchecked")
                Map<String, Object> resourceMap = (Map<String,Object>) yml.get("resource_registry");
                Iterator<Entry <String,Object>> it = resourceMap.entrySet().iterator();
        
                while (it.hasNext()) {
                        MsoHeatEnvironmentResource her = new MsoHeatEnvironmentResource();
                        Map.Entry<String, Object> pair = it.next();
                        her.setName((String) pair.getKey());
                        her.setValue((String) pair.getValue());
                        resourceList.add(her);
                }
                return resourceList;
        } catch (Exception e) {
            LOGGER.debug("Exception:", e);
        }
        return null;
    }
    public synchronized Set <HeatTemplateParam> getParameterList () {
        Set <HeatTemplateParam> paramSet = new HashSet <> ();
        @SuppressWarnings("unchecked")
        Map <String, Object> resourceMap = (Map <String, Object>) yml.get ("parameters");
        Iterator <Entry <String, Object>> it = resourceMap.entrySet ().iterator ();

        while (it.hasNext ()) {
            HeatTemplateParam param = new HeatTemplateParam ();
            Map.Entry <String, Object> pair = it.next ();
            @SuppressWarnings("unchecked")
            Map <String, String> resourceEntry = (Map <String, String>) pair.getValue ();
            String value = null;
            try {
                value = resourceEntry.get ("default");
            } catch (java.lang.ClassCastException cce) {
                LOGGER.debug("Exception:", cce);
                // This exception only - the value is an integer. For what we're doing
                // here - we don't care - so set value to something - and it will 
                // get marked as not being required - which is correct.
                //System.out.println("cce exception!");
                value = "300"; 
                // okay
            }
            param.setParamName ((String) pair.getKey ());
            if (value != null) {
                param.setRequired (false);
            } else {
                param.setRequired (true);
            }
            value = resourceEntry.get ("type");
            param.setParamType (value);

            paramSet.add (param);

        }
        return paramSet;

    }


}