package dif;

import haxe.Exception;
import dif.io.BytesWriter;
import dif.io.BytesReader;

@:expose
class Surface {
	public var windingStart:Int;
	public var windingCount:Int;
	public var planeIndex:Int;
	public var textureIndex:Int;
	public var texGenIndex:Int;
	public var surfaceFlags:Int;
	public var fanMask:Int;
	public var lightMapFinalWord:Int;
	public var lightMapTexGenXD:Float;
	public var lightMapTexGenYD:Float;
	public var lightCount:Int;
	public var lightStateInfoStart:Int;
	public var mapOffsetX:Int;
	public var mapOffsetY:Int;
	public var mapSizeX:Int;
	public var mapSizeY:Int;
	public var brushId:Int;

	public function new() {
		this.windingStart = 0;
		this.windingCount = 0;
		this.planeIndex = 0;
		this.textureIndex = 0;
		this.texGenIndex = 0;
		this.surfaceFlags = 0;
		this.fanMask = 0;
		this.lightMapFinalWord = 0;
		this.lightMapTexGenXD = 0;
		this.lightMapTexGenYD = 0;
		this.lightCount = 0;
		this.lightStateInfoStart = 0;
		this.mapOffsetX = 0;
		this.mapOffsetY = 0;
		this.mapSizeX = 0;
		this.mapSizeY = 0;
		this.brushId = 0;
	}

	public static function read(io:BytesReader, version:Version, interior:Interior) {
		var ret = new Surface();
		ret.windingStart = io.readInt32();

		if (interior.windings.length <= ret.windingStart)
			throw new Exception("DIF Type Error");

		if (version.interiorVersion >= 13)
			ret.windingCount = io.readInt32();
		else
			ret.windingCount = io.readByte();

		if (ret.windingStart + ret.windingCount > interior.windings.length) {
			throw new Exception("DIF Type Error");
		}

		ret.planeIndex = io.readInt16();
		var flipped = (ret.planeIndex >> 15 != 0);
		var planeIndexTemp = ret.planeIndex & ~0x8000;

		if ((planeIndexTemp & ~0x8000) >= interior.planes.length) {
			throw new Exception("DIF Type Error");
		}

		ret.textureIndex = io.readInt16();

		if (ret.textureIndex >= interior.materialList.length) {
			throw new Exception("DIF Type Error");
		}

		ret.texGenIndex = io.readInt32();

		if (ret.texGenIndex >= interior.texGenEQs.length) {
			throw new Exception("DIF Type Error");
		}

		ret.surfaceFlags = io.readByte();
		ret.fanMask = io.readInt32();
		ret.lightMapFinalWord = io.readInt16();
		ret.lightMapTexGenXD = io.readFloat();
		ret.lightMapTexGenYD = io.readFloat();
		ret.lightCount = io.readInt16();
		ret.lightStateInfoStart = io.readInt32();

		if (version.interiorVersion >= 13) {
			ret.mapOffsetX = io.readInt32();
			ret.mapOffsetY = io.readInt32();
			ret.mapSizeX = io.readInt32();
			ret.mapSizeY = io.readInt32();
		} else {
			ret.mapOffsetX = io.readByte();
			ret.mapOffsetY = io.readByte();
			ret.mapSizeX = io.readByte();
			ret.mapSizeY = io.readByte();
		}

		if (version.interiorType != "tge" && version.interiorType != "mbg") {
			io.readByte();
			if (version.interiorVersion >= 2 && version.interiorVersion <= 5)
				ret.brushId = io.readInt32();
		}

		return ret;
	}

	public function write(io:BytesWriter, version:Version) {
		io.writeInt32(this.windingStart);

		if (version.interiorVersion >= 13)
			io.writeInt32(this.windingCount);
		else
			io.writeByte(this.windingCount);

		io.writeInt16(this.planeIndex);
		io.writeInt16(this.textureIndex);
		io.writeInt32(this.texGenIndex);
		io.writeByte(this.surfaceFlags);
		io.writeInt32(this.fanMask);
		io.writeInt16(this.lightMapFinalWord);
		io.writeFloat(this.lightMapTexGenXD);
		io.writeFloat(this.lightMapTexGenYD);
		io.writeInt16(this.lightCount);
		io.writeInt32(this.lightStateInfoStart);

		if (version.interiorVersion >= 13) {
			io.writeInt32(this.mapOffsetX);
			io.writeInt32(this.mapOffsetY);
			io.writeInt32(this.mapSizeX);
			io.writeInt32(this.mapSizeY);
		} else {
			io.writeByte(this.mapOffsetX);
			io.writeByte(this.mapOffsetY);
			io.writeByte(this.mapSizeX);
			io.writeByte(this.mapSizeY);
		}

		if (version.interiorType != "tge" && version.interiorType != "mbg") {
			io.writeByte(0);
			if (version.interiorVersion >= 2 && version.interiorVersion <= 5)
				io.writeInt32(this.brushId);
		}
	}
}