import { extractFCParamsFactory, extractWeightsFactory, ParamMapping } from '../common/index';
import { NetParams } from './types';

export function extractParams(weights: Float32Array, channelsIn: number, channelsOut: number): { params: NetParams, paramMappings: ParamMapping[] } {
  const paramMappings: ParamMapping[] = [];

  const {
    extractWeights,
    getRemainingWeights,
  } = extractWeightsFactory(weights);

  const extractFCParams = extractFCParamsFactory(extractWeights, paramMappings);

  const fc = extractFCParams(channelsIn, channelsOut, 'fc');

  if (getRemainingWeights().length !== 0) {
    throw new Error(`weights remaing after extract: ${getRemainingWeights().length}`);
  }

  return {
    paramMappings,
    params: { fc },
  };
}