import ExcelJS from 'exceljs';
import type { DashboardReportPayload } from '../types/dashboardReport.ts';

const na = (value: number | null | undefined): number | string =>
  value == null || !Number.isFinite(value) ? 'N/A' : value;

export async function downloadReportExcel(payload: DashboardReportPayload): Promise<void> {
  const workbook = new ExcelJS.Workbook();
  workbook.creator = 'Dashboard CPSP';

  const counting = workbook.addWorksheet('Chicken Counting');
  counting.addRow([
    'Tanggal',
    'Hari',
    'Stok awal',
    'Mortalitas',
    'Panen',
    'Stok akhir',
    'IoT',
    'Akurasi %',
  ]);
  for (const row of payload.counting) {
    counting.addRow([
      row.date,
      row.day,
      na(row.countBefore),
      na(row.mortality),
      na(row.harvest),
      na(row.countAfter),
      na(row.iotCount),
      na(row.accuracy),
    ]);
  }

  const weight = workbook.addWorksheet('Weight');
  weight.addRow([
    'Tanggal',
    'Hari',
    'AVG manual',
    'AVG IoT',
    'Keseragaman',
    'Selisih',
    'Akurasi %',
  ]);
  for (const row of payload.weight) {
    weight.addRow([
      row.date,
      row.day,
      na(row.avgManual),
      na(row.avgIot),
      na(row.uniformity),
      na(row.difference),
      na(row.accuracy),
    ]);
  }

  const feedInSheet = workbook.addWorksheet('Feed In');
  feedInSheet.addRow(['Tanggal', 'Manual in', 'IoT in', 'Akurasi in %']);
  for (const row of payload.feedIn) {
    feedInSheet.addRow([row.date, na(row.manualIn), na(row.iotIn), na(row.accuracy)]);
  }

  const feedUseSheet = workbook.addWorksheet('Feed Use');
  feedUseSheet.addRow(['Tanggal', 'Hari', 'Manual use', 'IoT use', 'Akurasi use %']);
  for (const row of payload.feedUse) {
    feedUseSheet.addRow([row.date, row.day, na(row.manualUse), na(row.iotUse), na(row.accuracy)]);
  }

  const feedOutSheet = workbook.addWorksheet('Feed Out');
  feedOutSheet.addRow(['Tanggal', 'Manual out', 'IoT out', 'Akurasi out %']);
  for (const row of payload.feedOut) {
    feedOutSheet.addRow([row.date, na(row.manualOut), na(row.iotOut), na(row.accuracy)]);
  }

  const fcrSheet = workbook.addWorksheet('FCR');
  fcrSheet.addRow(['Hari', 'FCR', 'Total Pakan', 'Bobot IoT', 'Ayam Hidup', 'Total Bobot Panen']);
  for (const row of payload.fcr) {
    fcrSheet.addRow([
      row.day,
      na(row.iotFcr),
      na(row.feedTotal),
      na(row.iotWeight),
      na(row.chickenLife),
      na(row.harvestWeightTotal),
    ]);
  }

  const eefSheet = workbook.addWorksheet('EEF');
  eefSheet.addRow([
    'Hari',
    'EEF',
    'Persentase Ayam Hidup',
    'BW Rata-rata Panen',
    'Umur Rata-rata Panen',
    'FCR',
  ]);
  for (const row of payload.eef) {
    eefSheet.addRow([
      row.day,
      na(row.iotEef),
      na(row.chickenLifePercentage),
      na(row.iotAverageHarvestBw),
      na(row.iotAverageDayWeight),
      na(row.iotFcr),
    ]);
  }

  const buffer = await workbook.xlsx.writeBuffer();
  const blob = new Blob([buffer], {
    type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  });
  const period =
    payload.reportType === 'end_cycle' ? 'Akhir-Siklus' : `Harian-Hari-${payload.upToDay}`;
  const url = URL.createObjectURL(blob);
  const anchor = document.createElement('a');
  anchor.href = url;
  anchor.download = `Laporan-${period}-${payload.area}-${payload.kandangName}-${payload.cycleStart}_sd_${payload.cycleEnd}.xlsx`;
  anchor.click();
  URL.revokeObjectURL(url);
}