import type { DashboardReportPayload } from '../types/dashboardReport.ts';
import { countingTotals, feedInTotals, feedOutTotals, feedUseTotals } from './reportTotals.ts';
import { formatNumber, formatRatio } from './format.ts';

export type ReportSummaryMetricKey =
  | 'umur'
  | 'docWeight'
  | 'populasi'
  | 'mortalitas'
  | 'panen'
  | 'beratPanen'
  | 'karungMasuk'
  | 'karungDituang'
  | 'beratPakan'
  | 'karungKeluar'
  | 'beratAvg'
  | 'uniformity'
  | 'fcr'
  | 'eef';

export interface ReportSummaryMetric {
  key: ReportSummaryMetricKey;
  label: string;
  value: number | null;
  unit: string;
}

export interface ReportSummary {
  metrics: ReportSummaryMetric[];
}

const isPresent = (value: number | null | undefined): value is number =>
  typeof value === 'number' && Number.isFinite(value);

/** kg per karung — same factor as Dashboard feed weight panel */
const FEED_SACK_KG = 50;

export function latestValidRatio(
  rows: Array<{ iotFcr?: number | null; iotEef?: number | null }>,
  key: 'iotFcr' | 'iotEef'
): number | null {
  for (let i = rows.length - 1; i >= 0; i -= 1) {
    const value = rows[i]?.[key];
    if (typeof value === 'number' && Number.isFinite(value)) return value;
  }
  return null;
}

export function buildReportSummary(payload: DashboardReportPayload): ReportSummary {
  const lastCounting = payload.counting[payload.counting.length - 1] ?? null;
  const lastWeight = payload.weight[payload.weight.length - 1] ?? null;
  const counting = countingTotals(payload.counting);
  const feedIn = feedInTotals(payload.feedIn);
  const feedUse = feedUseTotals(payload.feedUse);
  const feedOut = feedOutTotals(payload.feedOut);

  const beratAvg = lastWeight
    ? isPresent(lastWeight.avgIot)
      ? lastWeight.avgIot
      : isPresent(lastWeight.avgManual)
        ? lastWeight.avgManual
        : null
    : null;

  const metrics: ReportSummaryMetric[] = [
    { key: 'umur', label: 'Umur', value: payload.upToDay, unit: 'hari' },
    {
      key: 'docWeight',
      label: 'Berat DOC',
      value: isPresent(payload.docWeight) ? payload.docWeight : null,
      unit: 'gram',
    },
    {
      key: 'populasi',
      label: 'Populasi',
      value: isPresent(lastCounting?.countAfter) ? lastCounting!.countAfter : null,
      unit: 'ekor',
    },
    {
      key: 'mortalitas',
      label: 'Mortalitas',
      value: counting?.mortality ?? null,
      unit: 'ekor',
    },
    {
      key: 'panen',
      label: 'Panen',
      value: counting?.harvest ?? null,
      unit: 'ekor',
    },
    {
      key: 'beratPanen',
      label: 'Berat Panen',
      // counting harvestWeight is stored in grams; surface kg for the summary card
      value: isPresent(counting?.harvestWeight) ? counting!.harvestWeight / 1000 : null,
      unit: 'kg',
    },
    {
      key: 'karungMasuk',
      label: 'Karung Masuk',
      value: feedIn?.manualIn ?? null,
      unit: 'karung',
    },
    {
      key: 'karungDituang',
      label: 'Karung Dituang',
      value: feedUse?.manualUse ?? null,
      unit: 'karung',
    },
    {
      key: 'beratPakan',
      label: 'Berat Pakan',
      value: isPresent(feedUse?.manualUse) ? feedUse!.manualUse * FEED_SACK_KG : null,
      unit: 'kg',
    },
    {
      key: 'karungKeluar',
      label: 'Karung Keluar',
      value: feedOut?.manualOut ?? null,
      unit: 'karung',
    },
    { key: 'beratAvg', label: 'Berat AVG', value: beratAvg, unit: 'gram' },
    {
      key: 'uniformity',
      label: 'Uniformity',
      value: isPresent(lastWeight?.uniformity) ? lastWeight!.uniformity : null,
      unit: '%',
    },
    {
      key: 'fcr',
      label: 'FCR',
      value: latestValidRatio(payload.fcr, 'iotFcr'),
      unit: '',
    },
    {
      key: 'eef',
      label: 'EEF',
      value: latestValidRatio(payload.eef, 'iotEef'),
      unit: '',
    },
  ];

  return { metrics };
}

export function formatSummaryValue(metric: ReportSummaryMetric): string {
  if (!isPresent(metric.value)) return '—';
  if (metric.key === 'fcr' || metric.key === 'eef') {
    return formatRatio(metric.value, 3);
  }
  if (
    metric.key === 'uniformity' ||
    metric.key === 'beratAvg' ||
    metric.key === 'beratPanen' ||
    metric.key === 'beratPakan' ||
    metric.key === 'docWeight'
  ) {
    return formatNumber(metric.value, 1, 0, true);
  }
  return formatNumber(metric.value, 0, 0, true);
}