DanielRowe/nmr-datastream

import { toDate } from '../utils/toDate';

export const herdRecordings = (datastream: string) => {
  const recordings: {
    date: Date,
    totalAnimals: number,
    cowsInMilk: number,
    cowsIn3xMilk: number,
    totalWeightOfMilk: number, // Add decimal point
    totalWeightOfFat: number, // Correct decimal placing
    totalWeightOfProtein: number, // Correct decimal placing
    totalWeightOfLactose: number, // Correct decimal placing
    differenceReason: string | undefined, // Why difference between calculated / bulk yield
    numberMissedWeights: number,
    printEligible: boolean,
    bulkYield: number,
    bulkFatPercentage: number,
    bulkProteinPercentage: number,
    bulkLactosePercentage: number,
    herdProductionBase: number,
    bulkSCC: number,
  }[] = [];

  const cattleInfoStart = datastream.indexOf('C1');
  // If we can't find the next part of the datastream... Somethings gone wrong.
  if (cattleInfoStart === -1) {
    throw new Error('Next section not found');
  }

  // We'll start by sorting out any herd information...
  // Ignore any data at cattle info start, then split by HD to array
  const herdInfo = datastream.substring(0, cattleInfoStart).split('HD,');
  if (herdInfo.length === 1) { // Throw exception if we've no records.
    throw new Error('No herd records found');
  }

  herdInfo.shift();
  herdInfo.map((info) => {
  // Break down array of info by easy to refer to name.
    const [
      recordingDate,,, // YYMMDD      , // recordingSeq // Blank
      // blank
      totalAnimals,
      cowsInMilk,
      cowsIn3xMilk, // Don't think this is in use.
      herdWOM, // Total amount of milk // DDDDD.D
      herdWOF, // Total fat kg DDD.DDDD
      herdWOP, // Total protein kg DDD.DDDD
      herdWOL, // Total lactose (as above)
      diffCode,
      missedWeight,
      printEligible,, , // blank
      // Line end / HE row.
      bulkYield,
      bulkFatPercentage,
      bulkProteinPercentage,
      bulkLactosePercentage,
      herdProductionBase,, , // blank
      // blank
      averageSCC,
    ] = info.split(',');

    const differenceCodes = [
      { code: '0', value: '' },
      { code: '1', value: 'No Sample Taken' },
      { code: '2', value: 'Yields Missing' },
      { code: '3', value: 'Not received in lab' },
      { code: '4', value: 'No Sample Taken' },
      { code: '5', value: 'Spilt' },
      { code: '6', value: 'Spoilt / Sour' },
      { code: '7', value: 'Sediment' },
    ];

    return recordings.push({
      date: toDate(recordingDate),
      totalAnimals: parseInt(totalAnimals, 10),
      cowsInMilk: parseInt(cowsInMilk, 10),
      cowsIn3xMilk: parseInt(cowsIn3xMilk, 10),
      totalWeightOfMilk: (parseInt(herdWOM, 10) / 10), // Add decimal point
      totalWeightOfFat: (parseInt(herdWOF, 10) / 10000), // Correct decimal placing
      totalWeightOfProtein: (parseInt(herdWOP, 10) / 10000), // Correct decimal placing
      totalWeightOfLactose: (parseInt(herdWOL, 10) / 10000), // Correct decimal placing
      differenceReason: differenceCodes.find((x) => x.code === diffCode)?.value,
      numberMissedWeights: parseInt(missedWeight, 10),
      printEligible: (printEligible === '0' || printEligible === ' '),
      bulkYield: parseInt(bulkYield, 10),
      bulkFatPercentage: (parseInt(bulkFatPercentage, 10) / 100),
      bulkProteinPercentage: (parseInt(bulkProteinPercentage, 10) / 100),
      bulkLactosePercentage: (parseInt(bulkLactosePercentage, 10) / 100),
      herdProductionBase: parseInt(herdProductionBase, 10),
      bulkSCC: parseInt(averageSCC, 10),
    });
  });
  return recordings;
};

export default herdRecordings;