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//      Magicbane Emulator Project © 2013 - 2022
//                www.magicbane.com


package engine.objects;

import engine.Enum;
import engine.InterestManagement.HeightMap;
import engine.db.archive.DataWarehouse;
import engine.gameManager.DbManager;
import engine.gameManager.ZoneManager;
import engine.math.Bounds;
import engine.math.Vector2f;
import engine.math.Vector3fImmutable;
import engine.net.ByteBufferWriter;
import engine.server.MBServerStatics;
import org.pmw.tinylog.Logger;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

public class Zone extends AbstractGameObject {

	private final int playerCityID;
	private final String zoneName;
	private final float xCoord;
	private final float zCoord;
	private final float yCoord;
	public float absX = 0.0f;
	public float absY = 0.0f;
	public float absZ = 0.0f;
	private final int loadNum;
	private final byte safeZone;
	private final String Icon1;
	private final String Icon2;
	private final String Icon3;
	private ArrayList<Zone> nodes = null;
	private int parentZoneID;
	private Zone parent = null;
	private Bounds bounds;
	private boolean isNPCCity = false;
	private boolean isPlayerCity = false;
	private String hash;
	public int minLvl;
	public int maxLvl;

	private float worldAltitude = 0;

	private float seaLevel = 0;
	public final Set<Building> zoneBuildingSet = Collections.newSetFromMap(new ConcurrentHashMap<>());
	public final Set<NPC> zoneNPCSet = Collections.newSetFromMap(new ConcurrentHashMap<>());
	public final Set<Mob> zoneMobSet = Collections.newSetFromMap(new ConcurrentHashMap<>());
	public boolean hasBeenHotzone = false;
	/**
	 * ResultSet Constructor
	 */
	public Zone(ResultSet rs) throws SQLException {
		super(rs);
		this.parentZoneID = rs.getInt("parent");
		this.playerCityID = rs.getInt("isPlayerCity");
		this.isPlayerCity = this.playerCityID != 0;
		this.zoneName = rs.getString("Name");
		this.xCoord = rs.getFloat("XCoord");
		this.zCoord = rs.getFloat("ZCoord");
		this.yCoord = rs.getFloat("YOffset");
		this.loadNum = rs.getInt("LoadNum");
		this.safeZone = rs.getByte("SafeZone");
		this.Icon1 = rs.getString("Icon1");
		this.Icon2 = rs.getString("Icon2");
		this.Icon3 = rs.getString("Icon3");
		this.hash = rs.getString("hash");

		this.minLvl = rs.getInt("minLvl");
		this.maxLvl = rs.getInt("maxLvl");

		//this needs to be here specifically for new zones created after server boot (e.g. player city zones)
		Zone parentZone = ZoneManager.getZoneByUUID(parentZoneID);

		this.setParent(parentZone);

		if (this.minLvl == 0 && parentZone != null){
			this.minLvl = parentZone.minLvl;
			this.maxLvl = parentZone.maxLvl;
		}

		if (parentZone != null)
			parentZone.addNode(this);

		// If zone doesn't yet hava a hash then write it back to the zone table

		if (hash == null)
			setHash();
		

	}

	/* Method sets a default value for player cities
	 * otherwise using values derived from the loadnum
	 * field in the obj_zone database table.
	 */
	public void setBounds() {

		float halfExtentX;
		float halfExtentY;

		// Set initial bounds object

		this.bounds = Bounds.borrow();

		// Player cities are assigned default value

		if (this.loadNum == 0) {
			bounds.setBounds(new Vector2f(this.absX, this.absZ), new Vector2f(Enum.CityBoundsType.ZONE.extents, Enum.CityBoundsType.ZONE.extents), 0.0f);
			return;
		}

		// All other zones have bounding boxes loaded from database
		ResultSet rs = DbManager.ZoneQueries.GET_ZONE_EXTENTS(this.loadNum);
		boolean loaded = false;

		if (rs != null)
			try {
				if (rs.next()) {
					halfExtentX = rs.getFloat("xRadius");
					halfExtentY = rs.getFloat("zRadius");
					this.bounds.setBounds(new Vector2f(this.absX, this.absZ), new Vector2f(halfExtentX, halfExtentY), 0.0f);
					loaded = true;
				}

			} catch (SQLException e) {
				Logger.error("SQLException: " + e.getMessage());
			}

		if (!loaded) {

			// Default to Citygrid size on error

			bounds.setBounds(new Vector2f(this.absX, this.absZ), new Vector2f(Enum.CityBoundsType.ZONE.extents, Enum.CityBoundsType.ZONE.extents), 0.0f);
		}

	}

	/*
	 * Getters
	 */
	public int getPlayerCityUUID() {
		if (this.playerCityID == 0)
			return 0;
		return this.playerCityID;
	}

	public String getName() {
		return zoneName;
	}

	public float getXCoord() {
		return xCoord;
	}

	public float getYCoord() {
		return yCoord;
	}

	public float getZCoord() {
		return zCoord;
	}

	public int getLoadNum() {
		return loadNum;
	}

	public int getLoadNumClient() {
		return loadNum;
	}

	public byte getSafeZone() {
		return safeZone;
	}

	public String getIcon1() {
		return Icon1;
	}

	public String getIcon2() {
		return Icon2;
	}

	public String getIcon3() {
		return Icon3;
	}

	public void setParent(final Zone value) {

		this.parent = value;
		this.parentZoneID = (this.parent != null) ? this.parent.getObjectUUID() : 0;

		if (this.parent != null) {
			this.absX = this.xCoord + parent.absX;
			this.absY = this.yCoord + parent.absY;
			this.absZ = this.zCoord + parent.absZ;

			if (this.minLvl == 0 || this.maxLvl == 0){
				this.minLvl = this.parent.minLvl;
				this.maxLvl = this.parent.maxLvl;
			}
		} else {  //only the Sea Floor zone does not have a parent
			this.absX = this.xCoord;
			this.absY = MBServerStatics.SEA_FLOOR_ALTITUDE;
			this.absZ = this.zCoord;
		}

		// Zone AABB is set here as it's coordinate space is world requiring a parent.
		this.setBounds();

		if (this.getHeightMap() != null && this.getHeightMap().getSeaLevel() != 0)
			this.seaLevel = this.getHeightMap().getSeaLevel();

	}

	public void generateWorldAltitude(){

		if (ZoneManager.getSeaFloor().getObjectUUID() == this.getObjectUUID()){
			this.worldAltitude = MBServerStatics.SEA_FLOOR_ALTITUDE;
			return;
		}

		Zone parentZone = this.parent;

		Zone currentZone = this;
		float altitude = this.absY;

		//seafloor only zone with null parent;

		while(parentZone != ZoneManager.getSeaFloor()){

			if(parentZone.getHeightMap() != null){

				Vector2f zoneLoc = ZoneManager.worldToZoneSpace(currentZone.getLoc(), parentZone);
				altitude += parentZone.getHeightMap().getInterpolatedTerrainHeight(zoneLoc);

			}
			currentZone = parentZone;
			parentZone = parentZone.parent;

		}

		this.worldAltitude = altitude;

		if (ZoneManager.getSeaFloor().equals(this))
			this.seaLevel = 0;
		else if
		(this.getHeightMap() != null && this.getHeightMap().getSeaLevel() == 0){
            this.seaLevel = this.parent.seaLevel;

		}else if (this.getHeightMap() != null){
			this.seaLevel = this.worldAltitude + this.getHeightMap().getSeaLevel();
		}else {
            this.seaLevel = this.parent.seaLevel;
        }

	}

	public Zone getParent() {
		return this.parent;
	}

	public float getAbsX() {
		return this.absX;
	}

	public float getAbsY() {
		return this.absY;
	}

	public float getAbsZ() {
		return this.absZ;
	}

	public boolean isMacroZone() {

		// Macro zones have icons.

		if (this.isPlayerCity == true)
			return false;

		if (this.parent == null)
			return false;

		return !this.getIcon1().equals("");
	}

	public boolean isNPCCity() {
		return this.isNPCCity;
	}

	public boolean isPlayerCity() {
		return this.isPlayerCity;
	}

	public void setNPCCity(boolean value) {
		this.isNPCCity = value;
	}

	public void setPlayerCity(boolean value) {
		this.isPlayerCity = value;
	}

	public Vector3fImmutable getLoc() {
		return new Vector3fImmutable(this.absX, this.absY, this.absZ);
	}

	public int getParentZoneID() {
		return this.parentZoneID;
	}

	public ArrayList<Zone> getNodes() {
		if (this.nodes == null) {
			this.nodes = DbManager.ZoneQueries.GET_MAP_NODES(super.getObjectUUID());

			//Add reverse lookup for child->parent
			if (this.nodes != null)
				for (Zone zone : this.nodes) {
					zone.setParent(this);
				}
		}

		return nodes;
	}

	public void addNode(Zone child) {
		this.nodes.add(child);
	}

	public void removeNode(Zone child) {
		this.nodes.remove(child);
	}

	/*
	 * Serializing
	 */

	
	public static void serializeForClientMsg(Zone zone,ByteBufferWriter writer) {

		if (zone.loadNum == 0 && zone.playerCityID == 0)
			Logger.warn( "Warning! WorldServerMap with ID " + zone.getObjectUUID() + " has a loadnum of 0 (player city) and no city linked. This will probably crash the client!");

		// Player City Terraform values serialized here.

		if (zone.playerCityID > 0) {
			writer.put((byte) 1); // Player City - True
			writer.putFloat(Enum.CityBoundsType.ZONE.extents);
			writer.putFloat(Enum.CityBoundsType.ZONE.extents);
		} else
			writer.put((byte) 0); // Player City - False

		writer.putFloat(zone.xCoord);
		writer.putFloat(zone.zCoord);
		writer.putFloat(zone.yCoord);

		writer.putInt(0);
		writer.putInt(0);
		writer.putInt(zone.loadNum);

		if (zone.playerCityID > 0) {
			City k = City.getCity(zone.playerCityID);

			if (k != null) {
				writer.putInt(k.getObjectType().ordinal());
				writer.putInt(k.getObjectUUID());
			}
			else
				writer.putLong(0x0);
		} else {
			writer.putInt(zone.getObjectType().ordinal());
			writer.putInt(zone.getObjectUUID());
		}
		writer.putInt(zone.nodes.size());

		City city = City.getCity(zone.playerCityID);

		if (city != null)
			writer.putString(city.getCityName());
		else
			writer.putString(zone.zoneName);
		writer.put(zone.safeZone);
		writer.putString(zone.Icon1);
		writer.putString(zone.Icon2);
		writer.putString(zone.Icon3);
		writer.put((byte) 0); // Pad

		for (Zone child : zone.nodes) {
			Zone.serializeForClientMsg(child,writer);
		}
	}

	@Override
	public void updateDatabase() {
		// TODO Auto-generated method stub
	}

	public Zone findRuinedCityZone(float centerX, float centerY, float centerZ){
		Bounds cityBounds;
		cityBounds = Bounds.borrow();
		Zone RuinedZone = null;
		cityBounds.setBounds(new Vector2f(centerX, centerZ), new Vector2f(Enum.CityBoundsType.ZONE.extents, Enum.CityBoundsType.ZONE.extents), 0.0f);
		Zone currentZone = ZoneManager.findSmallestZone(new Vector3fImmutable(centerX, centerY, centerZ));
		if (currentZone != null)
			if (this.getObjectUUID() == currentZone.getObjectUUID()){

				if (currentZone.getPlayerCityUUID() != 0){
					//null player city? skip..
					if (City.GetCityFromCache(currentZone.getPlayerCityUUID()) == null)
						RuinedZone = null;
					else	//no tol? skip...
						if (City.GetCityFromCache(currentZone.getPlayerCityUUID()).getTOL() == null)
							RuinedZone = null;
						else
							if (City.GetCityFromCache(currentZone.getPlayerCityUUID()).getTOL().getRank() == -1)
								RuinedZone = currentZone;
					//Dead tree? skip.
					cityBounds.release();
					return RuinedZone;
				}
			}

		for (Zone zone : this.getNodes()) {

			if (zone == this)
				continue;

			if (zone.isContinent() && zone.getPlayerCityUUID() == 0)
				continue;

			if (zone.getPlayerCityUUID() != 0){
				//null player city? skip..
				if (City.GetCityFromCache(zone.getPlayerCityUUID()) == null)
					continue;
				//no tol? skip...
				if (City.GetCityFromCache(zone.getPlayerCityUUID()).getTOL() == null)
					continue;

				//Dead tree? skip.
				if (Bounds.collide(zone.bounds, cityBounds, 0.0f)){
					if (City.GetCityFromCache(zone.getPlayerCityUUID()).getTOL().getRank() == -1){
						RuinedZone = zone;
						break;
					}
				}
			}
		}
		cityBounds.release();
		return RuinedZone;
	}

	public boolean isContinent() {

		if (this.equals(ZoneManager.getSeaFloor()))
			return false;

		if (this.getNodes().isEmpty())
			return false;

		if (this.getNodes().get(0).isMacroZone())
			return true;

		return this.getParent().equals(ZoneManager.getSeaFloor());

	}

	/**
	 * @return the bounds
	 */
	public Bounds getBounds() {
		return bounds;
	}

	public String getHash() {
		return hash;
	}

	public void setHash() {

		this.hash = DataWarehouse.hasher.encrypt(this.getObjectUUID());

		// Write hash to player character table

		DataWarehouse.writeHash(Enum.DataRecordType.ZONE, this.getObjectUUID());
	}

	// Return heightmap for this Zone.

	public HeightMap getHeightMap() {
		
		if (this.isPlayerCity)
			return HeightMap.PlayerCityHeightMap;

		return HeightMap.heightmapByLoadNum.get(this.loadNum);
	}

	public float getSeaLevel() {
		return seaLevel;
	}

	public float getWorldAltitude() {
		return worldAltitude;
	}

}