/*******************************************************************************
 * Copyright 2016-2017 ZTE, Inc. and others.
 * 
 * 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.
 ******************************************************************************/
package org.onap.msb.apiroute.wrapper.util;

import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.onap.msb.apiroute.ApiRouteAppConfig;
import org.onap.msb.apiroute.api.DiscoverInfo;
import org.onap.msb.apiroute.wrapper.InitRouteServiceWrapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.databind.ObjectMapper;

@SuppressWarnings("unchecked")
public class ConfigUtil {
    private final static ConfigUtil instance = new ConfigUtil();


    private ConfigUtil() {}

    public static ConfigUtil getInstance() {
        return instance;
    }

    private static final Logger LOGGER = LoggerFactory.getLogger(ConfigUtil.class);

    private String serverPort = "80";

    private String IUI_ROOT_PATH = "iui";

    private String API_ROOT_PATH = "api";

    private String namespaceMatches = "all";

    private String visualRangeMatches = "0";

    private String nodeMetaQueryParam = "";

    private String network_plane_typeMatches = "";

    private String[] routeWay = {"ip"};

    private Map<String, String> labelMapMatches;

    private DiscoverInfo discoverInfo = new DiscoverInfo();

    private String consul_ip = "";

    private String metricsUrl = "http://127.0.0.1:8066/admin/metrics";

    public void initRootPath() {
        String apiRootPathConfSource = "Default";
        String iuiRootPathConfSource = "Default";

        try {

            URL urlRootPath = ConfigUtil.class.getResource("/ext/initUrlRootPath/initUrlRootPath.json");
            if (urlRootPath != null) {
                String path = urlRootPath.getPath();

                LOGGER.warn("read initUrlRootPath:" + path);

                String fileContent = FileUtil.readFile(path);
                ObjectMapper mapper = new ObjectMapper();

                Map<String, String> map = mapper.readValue(fileContent, HashMap.class);
                if (map.get("iuiRootPath") != null) {
                    IUI_ROOT_PATH = map.get("iuiRootPath");
                    iuiRootPathConfSource = "initUrlRootPath.json";
                }
                if (map.get("apiRootPath") != null) {
                    API_ROOT_PATH = map.get("apiRootPath");
                    apiRootPathConfSource = "initUrlRootPath.json";
                }

            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            LOGGER.error("init UrlRootPath throw exception", e);
        }

        LOGGER.warn("init IUI_ROOT_PATH from [" + iuiRootPathConfSource + "]:" + IUI_ROOT_PATH);
        LOGGER.warn("init API_ROOT_PATH from [" + apiRootPathConfSource + "]:" + API_ROOT_PATH);

    }

    public void initApiGatewayPort() {

        String env_APIGATEWAY_EXPOSE_PORT = System.getenv("APIGATEWAY_EXPOSE_PORT");
        String httpExposePortConfSource = "Default";
        try {
            // read initApiGatewayConfig
            if (StringUtils.isBlank(env_APIGATEWAY_EXPOSE_PORT)) {
                URL apiGatewayConfigPath =
                                ConfigUtil.class.getResource("/ext/initApiGatewayConfig/initApiGatewayConfig.json");
                if (apiGatewayConfigPath != null) {
                    String path = apiGatewayConfigPath.getPath();

                    LOGGER.warn("read initApiGatewayConfig:" + path);

                    String fileContent = FileUtil.readFile(path);
                    ObjectMapper mapper = new ObjectMapper();

                    Map<String, Object> labelMap = mapper.readValue(fileContent, Map.class);
                    if (labelMap.get("port") != null) {
                        serverPort = (String) labelMap.get("port");
                        httpExposePortConfSource = "initApiGatewayConfig.json";
                    }
                }
            } else {
                serverPort = env_APIGATEWAY_EXPOSE_PORT;
                httpExposePortConfSource = "env:APIGATEWAY_EXPOSE_PORT";
            }
            LOGGER.warn("init APIGATEWAY http publish Port from [" + httpExposePortConfSource + "]:" + serverPort);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            LOGGER.error("read  initApiGatewayConfig Files or env(APIGATEWAY_EXPOSE_PORT) throw exception", e);
        }


    }

    public void initConsulIp() {
        String sys_consulIp = System.getenv("CONSUL_IP");
        if (StringUtils.isNotBlank(sys_consulIp)) {
            consul_ip = sys_consulIp;
            LOGGER.warn("init consul_Ip  from [env:CONSUL_IP]:" + sys_consulIp);
        } else {
            LOGGER.warn("init consul_Ip  from [env:CONSUL_IP] is blank");
        }


    }

    public void initRouteNameSpaceMatches() {
        String env_NAMESPACE = System.getenv("NAMESPACE");
        String namespaceConfSource = "Default";
        try {
            // read NAMESPACE
            if (StringUtils.isBlank(env_NAMESPACE)) {
                URL routeLabelsPath = InitRouteServiceWrapper.class
                                .getResource("/ext/initRouteLabels/initRouteLabelsMatches.json");
                if (routeLabelsPath != null) {
                    String path = routeLabelsPath.getPath();

                    String fileContent = FileUtil.readFile(path);
                    ObjectMapper mapper = new ObjectMapper();

                    Map<String, Object> labelMap = mapper.readValue(fileContent, Map.class);
                    if (labelMap.get("namespace") != null) {
                        namespaceMatches = (String) labelMap.get("namespace");
                        namespaceConfSource = "initRouteLabelsMatches.json";
                    }
                }
            } else {
                namespaceMatches = env_NAMESPACE;
                namespaceConfSource = "env:NAMESPACE";
            }
            LOGGER.warn("init namespace Filter from [" + namespaceConfSource + "]:" + namespaceMatches);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            LOGGER.error("read  initRouteNameSpaceMatches Files or env(NAMESPACE) throw exception", e);
        }



    }

    /**
     * @Title: initRouteLabelsMatches
     * @Description: TODO(According to the environment variable or a JSON file configuration
     *               initialization Route filter conditions)
     * @return: void
     */
    public void initRouteLabelsMatches() {
        String env_ROUTE_LABELS = System.getenv("ROUTE_LABELS");
        String visualRangeConfSource = "Default";
        String networkPlaneConfSource = "Default";
        String labelConfSource = "Default";
        try {

            // read ROUTE_LABELS
            if (StringUtils.isBlank(env_ROUTE_LABELS)) {
                URL routeLabelsPath = InitRouteServiceWrapper.class
                                .getResource("/ext/initRouteLabels/initRouteLabelsMatches.json");
                if (routeLabelsPath != null) {
                    String path = routeLabelsPath.getPath();

                    String fileContent = FileUtil.readFile(path);
                    ObjectMapper mapper = new ObjectMapper();

                    Map<?, ?> labelMap = mapper.readValue(fileContent, Map.class);
                    if (labelMap.get("predefineLabels") != null) {
                        Map<String, String> predefineLabelMapMatches =
                                        (Map<String, String>) labelMap.get("predefineLabels");
                        if (predefineLabelMapMatches.get("visualRange") != null) {
                            visualRangeMatches = predefineLabelMapMatches.get("visualRange");
                            visualRangeConfSource = "initRouteLabelsMatches.json";
                        }
                        if (predefineLabelMapMatches.get("network_plane_type") != null) {
                            network_plane_typeMatches = predefineLabelMapMatches.get("network_plane_type");
                            networkPlaneConfSource = "initRouteLabelsMatches.json";
                        }
                    }

                    if (labelMap.get("customLabels") != null) {
                        labelMapMatches = (Map<String, String>) labelMap.get("customLabels");
                        labelConfSource = "initRouteLabelsMatches.json";
                    }

                }
            } else {
                String[] env_routeLabels = StringUtils.split(env_ROUTE_LABELS, ",");
                Map<String, String> labelMap = new HashMap<String, String>();

                for (int i = 0; i < env_routeLabels.length; i++) {
                    String[] labels = StringUtils.split(env_routeLabels[i], ":");

                    if ("visualRange".equals(labels[0])) {
                        visualRangeMatches = labels[1];
                        visualRangeConfSource = "env:ROUTE_LABELS";
                    } else if ("network_plane_type".equals(labels[0])) {
                        network_plane_typeMatches = labels[1];
                        networkPlaneConfSource = "env:ROUTE_LABELS";
                    } else {
                        labelMap.put(labels[0], labels[1]);
                    }

                }

                labelConfSource = "env:ROUTE_LABELS";
                labelMapMatches = labelMap;

            }
            LOGGER.warn("init visualRange Filter from [ " + visualRangeConfSource + " ]:" + visualRangeMatches);
            LOGGER.warn("init network_plane_type Filter from [ " + networkPlaneConfSource + " ]:"
                            + network_plane_typeMatches);
            LOGGER.warn("init customLabels Filter from [ " + labelConfSource + " ]:" + labelMapMatches);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            LOGGER.error("read  initRouteLabelsPathMatches Files or env(ROUTE_LABELS) throw exception", e);
        }
    }

    public void initRouteWay() {
        String env_ROUTE_WAY = System.getenv("ROUTE_WAY");
        try {
            // read NAMESPACE
            if (StringUtils.isBlank(env_ROUTE_WAY)) {
                URL routeLabelsPath = InitRouteServiceWrapper.class.getResource("/ext/initRouteWay/initRouteWay.json");
                if (routeLabelsPath != null) {
                    String path = routeLabelsPath.getPath();

                    String fileContent = FileUtil.readFile(path);
                    ObjectMapper mapper = new ObjectMapper();

                    Map<String, Object> routeWayMap = mapper.readValue(fileContent, Map.class);
                    String routeWayFromConfig = (String) routeWayMap.get("routeWay");
                    if (StringUtils.isNotBlank(routeWayFromConfig)) {
                        routeWay = StringUtils.split(routeWayFromConfig, RouteUtil.SPLIT_LINE);
                        LOGGER.warn("init RouteWay from [initRouteWay.json]:" + routeWayFromConfig);
                    }
                }
            } else {
                routeWay = StringUtils.split(env_ROUTE_WAY, RouteUtil.SPLIT_LINE);
                LOGGER.warn("read initRouteWay from [env:ROUTE_WAY]:" + env_ROUTE_WAY);
            }



        } catch (Exception e) {
            // TODO Auto-generated catch block
            LOGGER.error("read  initRouteWay Files or env(ROUTE_WAY) throw exception", e);
        }
    }


    public void initDiscoverInfo(ApiRouteAppConfig configuration) {
        DiscoverInfo config_discoverInfo = configuration.getDiscoverInfo();


        discoverInfo.setEnabled(config_discoverInfo.isEnabled());

        String discoverInfoConfSource = "yaml config";

        if (config_discoverInfo.isEnabled()) {

            String discoverIP;
            String env_SDCLIENT_IP = System.getenv("SDCLIENT_IP");

            if (StringUtils.isBlank(env_SDCLIENT_IP)) {
                // yml
                discoverIP = config_discoverInfo.getIp();
            } else {
                discoverIP = env_SDCLIENT_IP;
                discoverInfoConfSource = "env:SDCLIENT_IP";
            }

            discoverInfo.setIp(discoverIP.trim());
            discoverInfo.setPort(config_discoverInfo.getPort());
        }

        LOGGER.warn("init DiscoverInfo from [" + discoverInfoConfSource + "]--" + discoverInfo.toString() + " Enabled:"
                        + discoverInfo.isEnabled());
    }

    public void initNodeMetaQueryParam() {
        // judge consul register node:caltalog
        String env_CONSUL_REGISTER_MODE = System.getenv("CONSUL_REGISTER_MODE");

        if (env_CONSUL_REGISTER_MODE == null || !env_CONSUL_REGISTER_MODE.trim().equals("catalog")) {
            nodeMetaQueryParam = "";
            return;
        }

        // visual range
        String nodemeta_visualrange = nodemeta_visualrange(visualRangeMatches);

        LOGGER.warn("calc nodemeta_visualrange from [" + visualRangeMatches + "]:" + nodemeta_visualrange);

        nodeMetaQueryParam = nodemeta_visualrange;

        // name space
        String nodemeta_namespace = nodemeta_namespace(namespaceMatches);
        LOGGER.warn("calc nodemeta_namespace from [" + namespaceMatches + "]:" + nodemeta_namespace);

        if (!nodeMetaQueryParam.isEmpty() && !nodemeta_namespace.isEmpty()) {
            nodeMetaQueryParam += "&";
        }
        nodeMetaQueryParam += nodemeta_namespace;

        /*
         * // nodemeta = (!nodemeta_visualrange.isEmpty() && !nodemeta_namespace .isEmpty()) ?
         * nodemeta_visualrange + "&" + nodemeta_namespace : nodemeta_visualrange +
         * nodemeta_namespace;
         */

    }

    private String nodemeta_visualrange(final String visualRangeMatches) {

        if (visualRangeMatches == null || visualRangeMatches.isEmpty()) {
            return "";
        }

        // external:0
        if (visualRangeMatches.trim().equals("0")) {
            return "node-meta=external:true";
        }

        // internal:1
        if (visualRangeMatches.trim().equals("1")) {
            return "node-meta=internal:true";
        }

        return "";
    }


    private String nodemeta_namespace(final String namespaceMatches) {

        // exclude null,"",all,&,|,!
        if (namespaceMatches == null || namespaceMatches.isEmpty() || namespaceMatches.contains("all")
                        || namespaceMatches.contains("&") || namespaceMatches.contains("|")
                        || namespaceMatches.contains("!")) {
            return "";
        }

        return "node-meta=ns:" + namespaceMatches;
    }

    public String getServerPort() {
        return serverPort;
    }

    public String getIUI_ROOT_PATH() {
        return IUI_ROOT_PATH;
    }

    public String getAPI_ROOT_PATH() {
        return API_ROOT_PATH;
    }

    public String getNamespaceMatches() {
        return namespaceMatches;
    }

    public String getVisualRangeMatches() {
        return visualRangeMatches;
    }

    public String getNetwork_plane_typeMatches() {
        return network_plane_typeMatches;
    }

    public String[] getRouteWay() {
        return routeWay.clone();
    }

    public Map<String, String> getLabelMapMatches() {
        return labelMapMatches;
    }

    public DiscoverInfo getDiscoverInfo() {
        return discoverInfo;
    }

    public String getMetricsUrl() {
        return metricsUrl;
    }

    public void setMetricsUrl(String metricsUrl) {
        this.metricsUrl = metricsUrl;
    }

    public String getNodeMetaQueryParam() {
        return nodeMetaQueryParam;
    }

    public String getConsul_ip() {
        return consul_ip;
    }



}