import BinaryStream from '../../common/binarystream';
import TokenStream from './tokenstream';
import GenericObject from './genericobject';

/**
 * A bone.
 */
export default class Bone extends GenericObject {
  geosetId: number = -1;
  geosetAnimationId: number = -1;

  constructor() {
    super(0x100);
  }

  readMdx(stream: BinaryStream) {
    super.readMdx(stream);

    this.geosetId = stream.readInt32();
    this.geosetAnimationId = stream.readInt32();
  }

  writeMdx(stream: BinaryStream) {
    super.writeMdx(stream);

    stream.writeInt32(this.geosetId);
    stream.writeInt32(this.geosetAnimationId);
  }

  readMdl(stream: TokenStream) {
    for (let token of super.readGenericBlock(stream)) {
      if (token === 'GeosetId') {
        token = stream.read();

        if (token === 'Multiple') {
          this.geosetId = -1;
        } else {
          this.geosetId = parseInt(token);
        }
      } else if (token === 'GeosetAnimId') {
        token = stream.read();

        if (token === 'None') {
          this.geosetAnimationId = -1;
        } else {
          this.geosetAnimationId = parseInt(token);
        }
      } else {
        throw new Error(`Unknown token in Bone ${this.name}: "${token}"`);
      }
    }
  }

  writeMdl(stream: TokenStream) {
    stream.startObjectBlock('Bone', this.name);
    this.writeGenericHeader(stream);

    if (this.geosetId === -1) {
      stream.writeFlagAttrib('GeosetId', 'Multiple');
    } else {
      stream.writeNumberAttrib('GeosetId', this.geosetId);
    }

    if (this.geosetAnimationId === -1) {
      stream.writeFlagAttrib('GeosetAnimId', 'None');
    } else {
      stream.writeNumberAttrib('GeosetAnimId', this.geosetAnimationId);
    }

    this.writeGenericAnimations(stream);
    stream.endBlock();
  }

  getByteLength() {
    return 8 + super.getByteLength();
  }
}