/*
 * © Copyright IBM Corp. 2012
 * 
 * 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 com.ibm.sbt.sample.app;

import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;

import com.ibm.commons.runtime.Application;
import com.ibm.commons.runtime.Context;
import com.ibm.commons.runtime.RuntimeFactory;
import com.ibm.commons.runtime.impl.app.RuntimeFactoryStandalone;
import com.ibm.sbt.services.client.ClientServicesException;
import com.ibm.sbt.services.client.base.BaseService;
import com.ibm.sbt.services.client.connections.communities.Community;
import com.ibm.sbt.services.client.connections.communities.CommunityService;
import com.ibm.sbt.services.client.connections.communities.Member;
import com.ibm.sbt.services.endpoints.BasicEndpoint;
import com.ibm.sbt.services.endpoints.EndpointFactory;
import com.ibm.sbt.services.client.base.datahandlers.EntityList;

/**
 * @author mwallace, Francis
 * @since 11 April 2013
 */
public class GetAllCommunitiesApp {

    private RuntimeFactory runtimeFactory;
    private Context context;
    private Application application;
    private BasicEndpoint endpoint;
    private CommunityService communityService;
    
    /**
     * Default constructor. Initialises the Context, the CommunityService, and the default CommunityService endpoint.
     * 
     * Be sure to call the destroy() method in this class if you don't intend to keep the initialised Context around.
     */
    public GetAllCommunitiesApp(){
        this(BaseService.DEFAULT_ENDPOINT_NAME, true);
    }
    
    /**
     * 
     * @param endpointName The name of the endpoint to use.
     * @param initEnvironment - True if you want a Context initialised, false if there is one already. destroy() should be called when finished using this class if a context is initialised here. 
     */
    public GetAllCommunitiesApp(String endpointName, boolean initEnvironment) {
        if(initEnvironment)
            this.initEnvironment();
        
        this.communityService = new CommunityService();
        this.setEndpoint((BasicEndpoint)EndpointFactory.getEndpoint(endpointName));
    }
    
    /**
     * 
     * @return The endpoint used in this class.
     */
    public BasicEndpoint getEndpoint(){
        return this.endpoint;
    }
    
    /**
     * 
     * @param endpoint The endpoint you want this class to use.
     */
    public void setEndpoint(BasicEndpoint endpoint){
        this.endpoint = endpoint;
        this.communityService.setEndpoint(this.endpoint);
    }

    /**
     * Initialise the Context, needed for Services and Endpoints.
     */
    public void initEnvironment() {
        runtimeFactory = new RuntimeFactoryStandalone();
        application = runtimeFactory.initApplication(null);
        context = Context.init(application, null, null);
    }
    
    /**
     * Destroy the Context.
     */
    public void destroy(){
        if (context != null)
            Context.destroy(context);
        if (application != null)
            Application.destroy(application);
    }
    
    public CommunityService getCommunityService(){
        return this.communityService;
    }
    
    /**
     * Get a list of public communities.
     * @return Collection of public communities
     * @throws ClientServicesException
     */
    public Collection<Community> getPublicCommunities() throws ClientServicesException{
        return communityService.getPublicCommunities();
    }
    
    /**
     * Get the members of a specified Community.
     * @param community
     * @return The members of the community.
     * @throws ClientServicesException
     */
    public EntityList<Member> getCommunityMembers(Community community) throws ClientServicesException{
        return communityService.getMembers(community.getCommunityUuid());
    }
    
	/**
	 * Demo.
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
	    GetAllCommunitiesApp app = new GetAllCommunitiesApp();
		
	    try {
	        CommunityService communityService = app.getCommunityService();
            Collection<Community> communities = communityService.getPublicCommunities();
            HashMap<String, String> parameters = new HashMap<String, String>();
            parameters.put("ps", "100"); //100 members will be retrieved at a time. Max is 10,000.
            for (Iterator<Community> iter = communities.iterator(); iter.hasNext(); ) {
                Community community = iter.next();
                boolean moreMembers = true;
                int page = 1;
                
                System.out.println(community.getTitle());
                do{
                    parameters.put("page", Integer.toString(page));
                    EntityList<Member> members = communityService.getMembers(community.getCommunityUuid(), parameters);
                    for (int i=0; i<members.size(); i++) {
                        System.out.println("    " + members.get(i).getEmail());
                    }
                    if((members.getStartIndex() + members.getItemsPerPage()) <= members.getTotalResults()){
                        moreMembers = true;
                        page++;
                    }else{
                        moreMembers=false;
                    }
                }while(moreMembers);
            }
        } catch (ClientServicesException e) {
            e.printStackTrace();
        } finally {
            app.destroy();
        }
	    
	}
}