import * as tf from '../../dist/tfjs.esm';

import { ConvParams, ExtractWeightsFunction, ParamMapping } from './types';

export function extractConvParamsFactory(
  extractWeights: ExtractWeightsFunction,
  paramMappings: ParamMapping[],
) {
  return (
    channelsIn: number,
    channelsOut: number,
    filterSize: number,
    mappedPrefix: string,
  ): ConvParams => {
    const filters = tf.tensor4d(
      extractWeights(channelsIn * channelsOut * filterSize * filterSize),
      [filterSize, filterSize, channelsIn, channelsOut],
    );
    const bias = tf.tensor1d(extractWeights(channelsOut));

    paramMappings.push(
      { paramPath: `${mappedPrefix}/filters` },
      { paramPath: `${mappedPrefix}/bias` },
    );

    return { filters, bias };
  };
}