package wikigraph;

import java.util.HashMap;

import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.Transaction;
import org.neo4j.kernel.EmbeddedGraphDatabase;

public class ReadWikiLink {

	
	public static void main(String[] args) {
		

		GraphDatabaseService graphDb = new EmbeddedGraphDatabase("wikiLinkDB");
		LinkToNode ltn = new LinkToNode(graphDb);
		Transaction tx = graphDb. beginTx();		
		
//		ltn.printAllNodes();
		
		ltn.searchPageTitleAllNodes();
		HashMap<String,Long> hash = ltn.getNamesTable();
		
		
		long lastNodeId = 0;
		// Print out page title and ID of All Node.  
		for (String key : hash.keySet()) {
//			System.out.println("page title = "+key + "\nID = " + hash.get(key));
			lastNodeId = Math.max(hash.get(key), lastNodeId);
		}
		
		long relCount = 0;
		String tmpKey="";
		// relHash record number of relationships of each node.
		// Key: page_title  value: number of relationships
		HashMap<String,Long> relHash = new HashMap<String,Long>();
		
		// relKeyHash
		// key: number of relationships  value: ID
		HashMap<Long,Long> relKeyHash = new HashMap<Long,Long>();
		
		for (String key : hash.keySet()) {
			long id = hash.get(key);
			Node node = graphDb.getNodeById(id);
			
			Iterable<Relationship> relIter = node.getRelationships();
			long count = 0;
			for (Relationship rel : relIter) {
				count++;
			}
			relHash.put(key, count);

			if (relCount < count ) {
				relCount = count;
				tmpKey = key;
			}
			relKeyHash.put(count, id);
		}
		
		for (String key : relHash.keySet()) {
//			System.out.println(key + ":"+relHash.get(key));
		}
		System.out.println("lastNodeId = "+ lastNodeId);
		System.out.println("Most :\n"+tmpKey+":"+relCount);
		

		for (long i = relKeyHash.size()-1 ; i>0 ; i-- ) {
			long id = relKeyHash.get(i);
			Node node = graphDb.getNodeById(id);
			System.out.prinln();
		}
		
		
		tx.success();
		tx.finish();
		graphDb.shutdown();
		
	}
	
}