import { IConfig, IGroup } from 'app/nodes/configs.interfaces';
import { CONFIG } from 'app/nodes/types';
import { createBaseParam, createBaseData } from 'app/nodes/utils';

const ecgParam = createBaseParam({ title: 'ECG Config', service: 'bf10', characteristic: 'bf13' });
const ecgData = createBaseData({ title: 'ECG Data', service: 'bf10', littleEndian: true, bytesPerSample: 3, bytesPerPackage: 12 });

const samplingFrequency = ecgParam({
  name: 'Sampling frequency', offset: 0, bits: 8,
  values: [
    { key: '125 Hz', value: 0 },
    { key: '250 Hz', value: 1 },
    { key: '500 Hz', value: 2 },
    { key: '1 kHz', value: 3 },
    { key: '2 kHz', value: 4 },
    { key: '4 kHz', value: 5 },
    { key: '8 kHz', value: 6 }
  ]
});

const ecgChannel1 = ecgData({ name: 'ECG Channel 1', characteristic: 'bf11', read: readECG });
const ecgChannel2 = ecgData({ name: 'ECG Channel 2', characteristic: 'bf12', read: readECG });

const samplingFrequencyGroup: IGroup = {
  title: 'Sampling Frequency',
  sections: [
    {
      title: ecgChannel1.title,
      toggle: ecgChannel1
    },
    {
      title: ecgChannel2.title,
      toggle: ecgChannel2
    },
    {
      title: 'Sampling Frequency',
      items: [samplingFrequency]
    }
  ]
};

function readECG(buffer: Buffer) {
  const bytesPerSample = 3;
  const data: number[] = [];

  for (let i = 0; i < 4; i++) {
    data.push(buffer.readIntBE(i * bytesPerSample, bytesPerSample));
  }

  return data;
}

export const groups: IGroup[] = [samplingFrequencyGroup];