import React, { useMemo } from 'react';
import type { Karung, ManualInput } from '../../types/api.ts';
import { formatNumber } from '../../utils/format.ts';

const StatItem: React.FC<{
  icon: React.ReactNode;
  label: string;
  value: number | null;
  colorOverride?: string;
}> = ({ icon, label, value, colorOverride }) => (
  <div className="border border-gray-200 rounded-lg p-3 hover:border-gray-300 transition-colors">
    <div className="flex items-start gap-2 mb-3 min-w-0">
      <div className="text-gray-500">{icon}</div>
      <p className="min-w-0 truncate text-xs sm:text-sm font-medium text-gray-700" title={label}>
        {label}
      </p>
    </div>
    <div className="rounded-md bg-gray-50/70 p-3">
      <p
        className="text-xl sm:text-2xl font-bold leading-none"
        style={{ color: colorOverride ?? '#374151' }}
      >
        {value == null ? 'N/A' : formatNumber(value)}
      </p>
      <p className="text-xs text-gray-400 mt-0.5">karung</p>
    </div>
  </div>
);

interface FeedStatsProps {
  latest: Karung | null;
  latestManual: ManualInput | null;
  cycleStartDate: string;
  displayDate: string;
}

const FeedStats: React.FC<FeedStatsProps> = ({
  latest,
  latestManual,
  cycleStartDate,
  displayDate,
}) => {
  const formatDisplayDate = (iso: string) =>
    new Intl.DateTimeFormat('id-ID', {
      day: 'numeric',
      month: 'long',
      year: 'numeric',
    }).format(new Date(`${iso}T00:00:00`));

  const todayLabel = useMemo(() => formatDisplayDate(displayDate), [displayDate]);

  const totalCycleLabel = useMemo(() => {
    const start = new Intl.DateTimeFormat('id-ID', {
      day: 'numeric',
      month: 'short',
    }).format(new Date(`${cycleStartDate}T00:00:00`));
    const end = new Intl.DateTimeFormat('id-ID', {
      day: 'numeric',
      month: 'short',
    }).format(new Date(`${displayDate}T00:00:00`));
    return `Total (${start} - ${end})`;
  }, [cycleStartDate, displayDate]);

  const columns = useMemo(
    () => [
      {
        key: 'masuk',
        title: 'Karung Masuk',
        color: '#2563eb',
        icon: <i className="fa-solid fa-arrow-down text-blue-600"></i>,
        iotToday: latest?.in_today ?? null,
        iotTotal: latest?.in_total ?? null,
        manualToday: latestManual?.feed_in_manual ?? null,
        manualTotal: latestManual?.feed_in_manual_total ?? null,
      },
      {
        key: 'dituang',
        title: 'Karung Dituang',
        color: '#ea580c',
        icon: <i className="fa-solid fa-arrow-up text-orange-600"></i>,
        iotToday: latest?.feed_use_today ?? null,
        iotTotal: latest?.feed_use_total ?? null,
        manualToday: latestManual?.feed_use_manual ?? null,
        manualTotal: latestManual?.feed_use_manual_total ?? null,
      },
      {
        key: 'keluar',
        title: 'Karung Keluar',
        color: '#dc2626',
        icon: <i className="fa-solid fa-arrow-right text-red-600"></i>,
        iotToday: latest?.out_today ?? null,
        iotTotal: latest?.out_total ?? null,
        manualToday: latestManual?.feed_out_manual ?? null,
        manualTotal: latestManual?.feed_out_manual_total ?? null,
      },
    ],
    [latest, latestManual]
  );

  return (
    <div className="bg-white p-4 sm:p-6 rounded-xl shadow-sm">
      <div className="grid grid-cols-1 md:grid-cols-3 gap-4 sm:gap-6">
        {columns.map((col) => (
          <div key={col.key}>
            <h3 className="font-semibold text-sm sm:text-base mb-2" style={{ color: col.color }}>
              {col.title}
            </h3>
            <div className="grid grid-cols-2 gap-3">
              <div className="space-y-3">
                <StatItem
                  icon={<i className="fa-solid fa-microchip text-purple-600"></i>}
                  label={`IOT · ${todayLabel}`}
                  value={col.iotToday}
                  colorOverride={col.color}
                />
                <StatItem
                  icon={<i className="fa-solid fa-microchip text-purple-600"></i>}
                  label={`IOT · ${totalCycleLabel}`}
                  value={col.iotTotal}
                  colorOverride={col.color}
                />
              </div>
              <div className="space-y-3">
                <StatItem
                  icon={<i className="fa-solid fa-user-pen text-gray-500"></i>}
                  label={`Manual · ${todayLabel}`}
                  value={col.manualToday}
                  colorOverride="#6b7280"
                />
                <StatItem
                  icon={<i className="fa-solid fa-user-pen text-gray-500"></i>}
                  label={`Manual · ${totalCycleLabel}`}
                  value={col.manualTotal}
                  colorOverride="#6b7280"
                />
              </div>
            </div>
          </div>
        ))}
      </div>
    </div>
  );
};

export default FeedStats;