package dk.daoas.daoadresseservice;

import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.commons.lang3.StringUtils;

import dk.daoas.daoadresseservice.admin.ServiceConfig;
import dk.daoas.daoadresseservice.beans.Address;
import dk.daoas.daoadresseservice.beans.AliasBean;
import dk.daoas.daoadresseservice.beans.DataStatisticsBean;
import dk.daoas.daoadresseservice.beans.ExtendedBean;
import dk.daoas.daoadresseservice.beans.HundredePctBean;
import dk.daoas.daoadresseservice.beans.SearchRequest;
import dk.daoas.daoadresseservice.beans.SearchResult;
import dk.daoas.daoadresseservice.beans.SearchResult.Status;
import dk.daoas.daoadresseservice.db.DatabaseLayer;
import dk.daoas.daoadresseservice.util.DaoUtils;
import dk.daoas.daoadresseservice.util.DeduplicateHelper;
import dk.daoas.daoadresseservice.util.NaturalOrderComparator;
import dk.daoas.daoadresseservice.util.NearestShortTreeMap;

public class AddressSearch {

	private Map<Short, Map<String,Integer>> searchPostnrVejnavnGadeid;	
	private Map<Integer,  Map<Short, Map<String,Address>>> searchGadeidentAdresser; // Gadeident -> husnrumre -> litra
	

	private List<Address> alleAdresser;
	
	private Map<String,Integer> helperCache;
	
	private DataStatisticsBean stats = new DataStatisticsBean();
	
	private DatabaseLayer db;
	private ServiceConfig config;
	
	
	StreetnameHelper levenshteinHelper;
	StreetnameHelper metaphoneHelper;
	StreetnameHelper googleHelper;
	StreetnameHelper osmHelper;
	
	
	public AddressSearch(DatabaseLayer db, ServiceConfig config) {
		
		this.db = db;
		this.config = config;
		
		levenshteinHelper = new LevenshteinStreetnameHelper( this );
		metaphoneHelper = new DoubleMetaphoneStreetnameHelper(config);
		googleHelper = new GoogleStreetnameHelper( config );
		osmHelper = new OSMStreetnameHelper( config );
	}
	
	public Address getAddressSafe(int gadeid, short husnr, String litra)  throws Exception {
		
		Map<Short, Map<String,Address>> gade = searchGadeidentAdresser.get(gadeid);
		
		if (gade == null) {
			throw new Exception("GadeID ikke fundet");
		}
		
		Map<String,Address> litraList = gade.get(husnr);
		
		Address addr = litraList.get(litra);
		
		if (addr == null) {
			throw new Exception("Adresse ikke ikke fundet");
		}
				
		return addr;
	}
	

	public SearchResult search(String postnrStr, String adresse)  {
		return search(postnrStr, adresse, false);
	}
	
	
	public SearchResult search(String postnrStr, String adresse, boolean naermesteHusnr)  {
		
		postnrStr = postnrStr.trim();
		adresse = adresse.trim();
		
		
		SearchRequest request = new SearchRequest();
		SearchResult result = new SearchResult();
		
		
		try {
			request.postnr = Short.parseShort(postnrStr);
		} catch (Exception E) {
			result.status = Status.ERROR_UNKNOWN_POSTAL;
			return result;
		}		
		
		
		request.streetNames = searchPostnrVejnavnGadeid.get(request.postnr);			
		
		if (request.streetNames == null) {
			result.status = Status.ERROR_UNKNOWN_POSTAL;
			return result;
		}
		
		
		result.splitResult = AddressUtils.splitAdresse(adresse);
		request.vejnavn = result.splitResult.vej;
		
						
		
		if (result.splitResult.husnr.length() == 0) {
			result.status = Status.ERROR_MISSING_HOUSENUMBER;
			return result;
		}
		
		result.vasketVejnavn = AddressUtils.vaskVejnavn( request.vejnavn );
		

		if (result.vasketVejnavn.indexOf("pakkebo") > -1 
				|| result.vasketVejnavn.indexOf("pakkepost") > -1
				|| result.vasketVejnavn.indexOf("postbo") > -1   // postbox/postboks
				|| result.vasketVejnavn.indexOf("døgnpost") > -1
				|| result.vasketVejnavn.indexOf("døgnbo") > -1 // døgnbox // døgnboks
				|| result.vasketVejnavn.equals("id") 
				) {
			result.status = Status.ERROR_POSTBOX;
			return result;			
		}
		
		// LookupStreetname er en indkapsling af alm + levenstein + google + osm
		Integer gadeident = lookupStretname(request, result, true);
		
		
		/*
		 * Hvis der ikke er direkte hits, prøver vi at skære ord af vejnavn
		 *
		 * <strike>Denne sektion er MEGET experimental da den øger antallet af kald til google/OSM væsentligt</strike>*/
		if (gadeident == null) {
			final int MAX_TRIES = 4;
			
			String vejnavnParts[] = request.vejnavn.split(" ");
			
			for (int i=1; i<=MAX_TRIES && i<vejnavnParts.length; i++) {
				String subVejnavn = DaoUtils.joinHelper(vejnavnParts, i);
				
				request.vejnavn = subVejnavn;
				result.vasketVejnavn = AddressUtils.vaskVejnavn( request.vejnavn );
				
				gadeident = lookupStretname(request, result, false);//prøv opslag MEN UDEN GOOGLE/OSM !!!
				
				//hvis vi fandt vejen ud fra substrengen
				if (gadeident != null) { 
					break;
				}			
				
				//hvis vi ikke fandt kopierer vi vejnavn fra split igen
				request.vejnavn = result.splitResult.vej;
				result.vasketVejnavn = AddressUtils.vaskVejnavn( request.vejnavn );
			}			
		}
		

		
		if (gadeident == null) {			
			result.status = Status.ERROR_UNKNOWN_STREETNAME; 
			return result;
		}
		
		result.gadeident = gadeident;
		
		
		Map<Short, Map<String,Address>> gade = searchGadeidentAdresser.get(gadeident); 
		if (gade == null) { //Denne søgning må ikke fejle
			result.status = Status.ERROR_INTERNAL; 
			return result;			
		}
		
		
		//Kunne evt klares med Iterables.get fra Guava/Collections
		Address firstAddress = gade.values().iterator().next().values().iterator().next(); //Første husnr -> første litra
		result.vej = firstAddress.vejnavn;
		
		short husnrSearch = Short.parseShort(result.splitResult.husnr );		
		Map<String,Address> litraList = gade.get(husnrSearch);
		

		if (litraList == null) { //Husnr ikke fundet
			
			if (naermesteHusnr) {
				TreeMap<Short, Map<String,Address>> gadeTreeMap = (TreeMap<Short, Map<String,Address>>) gade;
				result.anvendtHusnr = NearestShortTreeMap.getNearestKey(husnrSearch, gadeTreeMap);
				
				result.nearestHusnr = true;
				litraList = gade.get(result.anvendtHusnr);
				
				
			} else {
				result.status = Status.ERROR_UNKNOWN_ADDRESSPOINT; 
				return result;	
			}
		}
		
		Address addr = litraList.get( result.splitResult.litra );
		
		if (addr == null) { //litra ikke fundet
			if (config.nearestLitra == true || naermesteHusnr == true) {
				result.nearestLitra = true;
				addr = litraList.values().iterator().next();				
			} else {
				//husnr fundet men litra blev ikke fundet
				result.status = Status.ERROR_UNKNOWN_ADDRESSPOINT; 
				return result;	
			}			
		}
		
		result.address = addr;
		
		
		if ( StringUtils.equals(addr.distributor, "LUKKET") ) {			
			result.status = Status.STATUS_NOT_COVERED; //Skal vi have en special status til Lukkede adresser ?
			return result;
		}				
		
		if (addr.daekningsType == DaekningsType.DAEKNING_IKKEDAEKKET) {
			result.status = Status.STATUS_NOT_COVERED; 
			return result;
		}

		
		result.status = Status.STATUS_OK;

		return result;
	}


	private Integer lookupStretname(SearchRequest request, SearchResult result, boolean useExternal) {
		String helperSearchKey = "";
		
		Integer gadeident =  request.streetNames.get(result.vasketVejnavn);
		
		
		if ( gadeident == null) {
			helperSearchKey = "" + request.postnr + "/" + result.vasketVejnavn;
			gadeident = helperCache.get(helperSearchKey);
		}
		
		if (gadeident == null) {
			String vej = levenshteinHelper.proposeStreetName(request, result);
			if (vej != null) {
				gadeident =  request.streetNames.get(vej);
			}
		}
		
		if (gadeident == null) {
			String vej = metaphoneHelper.proposeStreetName(request, result);
			if (vej != null) {
				gadeident =  request.streetNames.get(vej);
			}
		}
		
		
		// Brug OpenStreetMap før vi prøver google
		// For google har en request limit, det har OSM ikke!
		if ( gadeident == null && useExternal) {
			String vej = osmHelper.proposeStreetName(request, result);		
			gadeident = helperWrapper(vej, request.streetNames, helperSearchKey);
		}
		
		if ( gadeident == null && useExternal) {
			String vej = googleHelper.proposeStreetName(request, result);		
			gadeident = helperWrapper(vej, request.streetNames, helperSearchKey);
		}
		return gadeident;
	}
	
	private Integer helperWrapper(String vej, Map<String,Integer> postnrVeje, String helperSearchKey) {
		if (vej == null)
			return null;
		
		String vejVasket = AddressUtils.vaskVejnavn( vej );
		Integer gadeident =  postnrVeje.get(vejVasket);
		
		if (gadeident != null) {
			helperCache.put(helperSearchKey, gadeident);
		}
		return gadeident;
		
	}
	
	public Map<String,Integer> getStretsByPostal(short zip) {
		return searchPostnrVejnavnGadeid.get(zip);
	}

	
	
	public void buildSearchStructures() throws SQLException{
		searchPostnrVejnavnGadeid = new HashMap<Short, Map<String,Integer>>();
		searchGadeidentAdresser = new HashMap<Integer,  Map<Short, Map<String,Address>>>();
		helperCache = new ConcurrentHashMap<String,Integer>();
		
		long start1 = System.currentTimeMillis();
		System.out.println("Build -- stage 1");
		
		alleAdresser = db.getAllAdresses();
		
		
		/* Mapper mellem db Row ID og adresse noden */
		Map<Integer,Address> idAddressMap = new HashMap<Integer,Address>( alleAdresser.size() );
		DeduplicateHelper<String> aliasHelper = new DeduplicateHelper<String>(400000); // Indeholder pt 379664 entries
		
		DeduplicateHelper<Short> shortHelper = new DeduplicateHelper<Short>();
		DeduplicateHelper<Integer> intHelper = new DeduplicateHelper<Integer>();
		
		AliasGenerator aliasGenerator = new AliasGenerator();
		
		
		for (Address a : alleAdresser) {
			idAddressMap.put(a.id, a);
			
			Short postnr = shortHelper.getInstance(a.postnr);
			
			Map<String,Integer> postnrVeje = searchPostnrVejnavnGadeid.get(postnr);		
			
			if (postnrVeje == null) {
				postnrVeje = new HashMap<String,Integer>(10240); //lige nu indeholder den største 9500 entries
				searchPostnrVejnavnGadeid.put(postnr, postnrVeje);
			}
				
			
			String vasketVejnavn = AddressUtils.vaskVejnavn(a.vejnavn);
			Integer gadeident = postnrVeje.get(vasketVejnavn);
			if (gadeident == null) {				
				//postnrVeje.put(vasketVejnavn, a.gadeid);
				
				gadeident = intHelper.getInstance( a.gadeid );
				
				Set<String> aliaser = aliasGenerator.findVejAliaser(a.vejnavn);
				for(String alias : aliaser) {
					String vasketAlias = AddressUtils.vaskVejnavn(alias);
					vasketAlias = aliasHelper.getInstance(vasketAlias);
					
					postnrVeje.put(vasketAlias, gadeident);	
				}
				
			}
			
			
			Map<Short, Map<String,Address>> gade =  searchGadeidentAdresser.get(gadeident); 
			if (gade == null) {
				gade = new TreeMap<Short, Map<String,Address>>();
				searchGadeidentAdresser.put(gadeident, gade);
			}
			
			Map<String,Address> litraList = gade.get(a.husnr);
			if (litraList == null) {
				litraList = new HashMap<String,Address>();
				gade.put(a.husnr, litraList);
			}
			
			litraList.put(a.husnrbogstav, a);			
		}
				

		////////////////////////////////////////////////////////////////////////////////////////
		long start2 = System.currentTimeMillis();
		System.out.println("Build, stage1 elapsed: " + (start2-start1) );
		System.out.println("Build -- stage 2 alias tabel");
		
		int vaskCount = 0;
		List<AliasBean> aliasList = db.getAliasList();
		for (AliasBean alias : aliasList) {
			Map<String,Integer> postnrVeje = searchPostnrVejnavnGadeid.get(alias.postnr);
			
			if (postnrVeje == null) {
				//Burde ikke kunne ske - men better safe than sorry
				continue;
			}
			
			String vasketVej = AddressUtils.vaskVejnavn(alias.vejnavn);
			String vasketAlias = AddressUtils.vaskVejnavn(alias.aliasVejnavn);
			
			Integer gadeident = postnrVeje.get(vasketVej);
			if (gadeident == null) {
				//Kender ikke den oprindelige vej
				continue;
			}
			
			Integer aliasIdent = postnrVeje.get(vasketAlias);
			
			if (aliasIdent == null) { //Vi kender ikke denne variant af vejnavnet
				postnrVeje.put(vasketAlias, gadeident);	
				vaskCount++;
			}
			
		}
		System.out.println("Anvendte " + vaskCount + " aliaser fra databasen");
		
		
		////////////////////////////////////////////////////////////////////////////////////////
		long start3 = System.currentTimeMillis();
		System.out.println("Build, stage2 elapsed: " + (start3-start2) );
		System.out.println("Build -- stage 3 udvidet dækning");
		
		DeduplicateHelper<String> ruteHelper = new DeduplicateHelper<String>();
		DeduplicateHelper<String> korelisteHelper = new DeduplicateHelper<String>();
		
		List<ExtendedBean> extDao = db.getExtendedAdresslist();
		for (ExtendedBean eb : extDao) {
			
			Address orgAddress = idAddressMap.get(eb.orgId);			
			if (orgAddress == null)
				continue;
			
			if (orgAddress.daekningsType != DaekningsType.DAEKNING_IKKEDAEKKET) {
				//kan være at adressen er blevet markeret dækket og - find-nærmeste data ikke er opdateret i mellemtiden
				continue; 
			}
			
			Address targetAddress = idAddressMap.get(eb.targetId);
			if (targetAddress == null) {
				continue;
			}
			
			
			if ( StringUtils.equals(orgAddress.distributor, "LUKKET") ) {
				continue;
			}			
			
			
			
			if ( StringUtils.equals(targetAddress.distributor, "LUKKET") ) {
				continue;
			}
			
			orgAddress.extTarget = targetAddress;
			orgAddress.extAfstand = eb.afstand;

			boolean covered = false;
			if (targetAddress.distributor.equals("DAO")) {
				orgAddress.rute = calculateExtendedDaoRoute(eb,orgAddress,targetAddress);	
				orgAddress.rute = ruteHelper.getInstance(orgAddress.rute);
				
				if (orgAddress.rute != null) {
					orgAddress.koreliste = targetAddress.koreliste;
					covered = true;
				}
			}
			
			if (targetAddress.distributor.equals("BK")) {
				orgAddress.koreliste = calculateExtendedBkKoreliste(eb,orgAddress,targetAddress);
				orgAddress.koreliste = korelisteHelper.getInstance(orgAddress.koreliste);
				
				if (orgAddress.koreliste != null) {
					orgAddress.rute = targetAddress.rute;
					covered = true;
				}
			}
			
			if (covered) { //Kopier resten af felterne
				orgAddress.daekningsType = DaekningsType.DAEKNING_UDVIDET;
				orgAddress.dbkBane = targetAddress.dbkBane;
				
				/* Sådan gør den gamle service */
				/* 20150520 THN- hvis vi bibeholder de originale kommune+vejkoder kan vi bruge DAVID til join i databasen*/
				//orgAddress.kommunekode = targetAddress.kommunekode;
				//orgAddress.vejkode = targetAddress.vejkode;
				
				
				orgAddress.distributor = targetAddress.distributor;
			}
		}
		
		// nu skal vi ikke bruge idAddressMap længere
		idAddressMap = null;
		
		//////////////////////////////////////////////////////////////////////////////////////
		long start4 = System.currentTimeMillis();
		System.out.println("Build, stage3 elapsed: " + (start4-start3) );
		System.out.println("Build -- stage 4 - 100pct");
		
		Map<Short,HundredePctBean> hundredePct = db.get100PctList();
		for (Address addr : alleAdresser) {
			if (addr.daekningsType != DaekningsType.DAEKNING_IKKEDAEKKET) {				
				continue;
			}
			
			if (addr.distributor != null && addr.distributor.equals("LUKKET")) {
				continue;
			}
			
			
			HundredePctBean bean = hundredePct.get(addr.postnr);
			if (bean == null) {
				continue;
			}
			
			addr.daekningsType = DaekningsType.DAEKNING_100PCT;
			addr.rute = bean.rute;
			addr.koreliste = bean.koreliste;
			addr.dbkBane = bean.dbkBane;
			addr.distributor = bean.distributor;
		}
		
		////////////////////////////////////////////////////////////////////////////////////
		long stop = System.currentTimeMillis();
		System.out.println("Build, stage4 elapsed: " + (stop-start4) );
		System.out.println("Build -- Gathering statistics");
				
		for (Address addr : alleAdresser) {
			switch (addr.daekningsType) {
			case DAEKNING_DIREKTE:
				stats.direkteCount++;
				break;
			case DAEKNING_UDVIDET:
				stats.extendedCount++;
				break;
			case DAEKNING_100PCT:
				stats.hundredePctCount++;
				break;
			default:
				stats.ikkeDaekketCount++;
			}
		}		
		stats.totalCount = alleAdresser.size();
		
		
		stats.elapsed = stop-start1;		
		stats.buildTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format( new Date() );
		
		System.out.println("Build: totalCount: " + stats.totalCount);
		System.out.println("Build: direkteCount: " + stats.direkteCount);
		System.out.println("Build: extendedCount: " + stats.extendedCount);
		System.out.println("Build: hundredePctCount: " + stats.hundredePctCount);
		System.out.println("Build: ikkeDaekketCount: " + stats.ikkeDaekketCount);
		
		System.out.println("Build: Total Elapsed: " + (stop-start1) );
		System.out.println("Build Completed");
		
	}
	
	public DataStatisticsBean getStatistics() {
		return stats;
	}
	
	public DatabaseLayer getDatabaseLayer() {
		return db;
	}
	
	public void clear() {
		searchPostnrVejnavnGadeid.clear();
		searchGadeidentAdresser.clear();
		alleAdresser.clear();
		helperCache.clear();
	}
	
	
	private String calculateExtendedDaoRoute(ExtendedBean eb, Address orgAddress, Address targetAddress) {
		if (targetAddress.rute == null) { //hvis targetAdress.rute er null så er adressen ikke dækket alligevel
			return null;
		}

		// ///////////////////////////////////////////////////////////////////
		switch( eb.transport) {
		case "cykel":
			if (eb.afstand < 0.151) {
				return "." + targetAddress.rute;
			} else if (eb.afstand < 0.501) {
				return ".." + targetAddress.rute;
			} else if (eb.afstand < 0.701) {
				return "..." + targetAddress.rute;
			} else if (eb.afstand < 1.001) {
				return "...." + targetAddress.rute;
			}
			break;			
		case "scooter":
			if (eb.afstand < 0.151) {
				return "." + targetAddress.rute;
			} else if (eb.afstand < 0.801) {
				return ".." + targetAddress.rute;
			} else if (eb.afstand < 1.201) {
				return "..." + targetAddress.rute;
			} else if (eb.afstand < 2.101) {
				return "...." + targetAddress.rute;
			}
			break;				
		case "bil":
			if (eb.afstand < 0.151) {
				return "." + targetAddress.rute;
			} else if (eb.afstand < 1.001) {
				return ".." + targetAddress.rute;
			} else if (eb.afstand < 1.601) {
				return "..." + targetAddress.rute;
			} else if (eb.afstand < 2.601) {
				return "...." + targetAddress.rute;
			}
			break;
		default:
			System.out.println("Ukendt transport type: " + eb );
		}		
		return null;
	}
	
	public List<Address> getNonCoveredAddresses() {
		List<Address> result = new ArrayList<Address>(60000);
		for (Address a : alleAdresser) {
			if ( a.daekningsType == DaekningsType.DAEKNING_IKKEDAEKKET) {
				result.add(a);
			}
		}
		Collections.sort(result );
		return result;
	}
	
	public List<Address> get100PctAddresses() {
		List<Address> result = new ArrayList<Address>(120000);
		for (Address a : alleAdresser) {
			if ( a.daekningsType == DaekningsType.DAEKNING_100PCT) {
				result.add(a);
			}
		}
		Collections.sort(result );
		return result;
	}
	
	///////////////////////////////////////////////////////////
	private String calculateExtendedBkKoreliste(ExtendedBean eb, Address orgAddress, Address targetAddress) {
		String inject;
		if (eb.afstand <= 0.500) {
			inject = ".";
		} else {
			inject = "..";
		}
		return AddressUtils.injectIntoBk(targetAddress.koreliste, inject);
	}
	
	
	public Set<Short> getPostnumre() {
		return new TreeSet<Short>( searchPostnrVejnavnGadeid.keySet() );
	}
	
	public Set<Entry<String,Integer>> getVejnavne(short postnr) {
		Map<String,Integer> map = searchPostnrVejnavnGadeid.get(postnr);
		
		TreeMap<String,Integer> newMap = new TreeMap<String,Integer>( map );//Lav et nyt TreeMap for at sikre sortering
		
		return newMap.entrySet();
	}
	
	public Set<String> getHusnumre(int gadeid) {
				
		Map<Short,Map<String, Address>> gade = searchGadeidentAdresser.get(gadeid);
		
		Set<String> set = new TreeSet<String>( new NaturalOrderComparator<String>() );
		for(Map<String,Address> litraList : gade.values()) {
			for (Address a: litraList.values()) {
				set.add( a.husnr + a.husnrbogstav );				
			}
		}
		
		return set;
	}
	
	public Address getAdresse(int gadeid, String husnrStr) {
		short husnr = Short.parseShort( husnrStr.replaceAll("[^\\d]","") );
		String litra =  husnrStr.replaceAll("\\d", "");		
		
		Map<Short,Map<String, Address>> gade = searchGadeidentAdresser.get(gadeid);
		Map<String, Address> litraList = gade.get(husnr);
		return litraList.get(litra);
		
	}
		
}