/**
 * @license
 * Copyright 2020 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */

import {KernelConfig, LinSpace, LinSpaceAttrs, scalar, tidy} from '@tensorflow/tfjs';

import {createTensorsTypeOpAttr, NodeJSKernelBackend} from '../nodejs_kernel_backend';

export const linSpaceConfig: KernelConfig = {
  kernelName: LinSpace,
  backendName: 'tensorflow',
  kernelFunc: (args) => {
    const backend = args.backend as NodeJSKernelBackend;
    const {start, stop, num} = args.attrs as unknown as LinSpaceAttrs;

    const opAttrs = [
      createTensorsTypeOpAttr('T', 'float32'),
      createTensorsTypeOpAttr('Tidx', 'int32')
    ];

    return tidy(() => {
      const inputs = [
        scalar(start, 'float32'), scalar(stop, 'float32'), scalar(num, 'int32')
      ];
      return backend.executeSingleOutput(LinSpace, opAttrs, inputs);
    });
  }
};