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

interface FeedSaldoCardProps {
  latest: Karung | null;
  feedInitialBalance: number;
  cycleStartDate: string;
  displayDate: string;
}

const FeedSaldoCard: React.FC<FeedSaldoCardProps> = ({
  latest,
  feedInitialBalance,
  cycleStartDate,
  displayDate,
}) => {
  const saldoData = useMemo(() => {
    const inbound = (latest?.in_total ?? 0) + feedInitialBalance;
    const feedUse = latest?.feed_use_total ?? 0;
    const keluar = latest?.out_total ?? 0;
    const saldo = inbound - feedUse - keluar;
    return { inbound, feedUse, keluar, saldo };
  }, [latest, feedInitialBalance]);

  const formatDateRange = useMemo(() => {
    const formatDate = (iso: string) =>
      new Intl.DateTimeFormat('id-ID', {
        day: 'numeric',
        month: 'long',
        year: 'numeric',
      }).format(new Date(`${iso}T00:00:00`));
    return `${formatDate(cycleStartDate)} - ${formatDate(displayDate)}`;
  }, [cycleStartDate, displayDate]);

  const getSaldoStatusColor = (saldo: number) => {
    if (saldo > 0) return 'text-green-600';
    if (saldo < 0) return 'text-red-600';
    return 'text-gray-600';
  };

  return (
    <div className="bg-gradient-to-br from-blue-50 to-indigo-50 p-6 rounded-xl shadow-sm border-2 border-blue-200">
      <div className="flex items-center justify-between mb-4">
        <div className="flex items-center gap-3">
          <div className="bg-blue-500 text-white p-3 rounded-lg">
            <i className="fa-solid fa-scale-balanced text-2xl"></i>
          </div>
          <div>
            <h2 className="text-xl font-bold text-gray-800">Saldo Karung IOT</h2>
            <p className="text-sm text-gray-600">{formatDateRange}</p>
          </div>
        </div>
      </div>

      {/* Saldo Display */}
      <div className="bg-white rounded-lg p-6 border border-blue-200">
        <div className="grid grid-cols-1 gap-6 sm:grid-cols-2 lg:grid-cols-4">
          {/* Karung Masuk */}
          <div className="text-center">
            <div className="flex items-center justify-center gap-2 mb-2">
              <i className="fa-solid fa-arrow-down text-green-600"></i>
              <p className="text-sm font-semibold text-gray-700">Karung Masuk</p>
            </div>
            <p className="text-3xl font-bold text-green-600">{formatNumber(saldoData.inbound)}</p>
            <p className="text-xs text-gray-400 mt-1">karung</p>
          </div>

          {/* Karung Dituang (feed use) */}
          <div className="text-center">
            <div className="flex items-center justify-center gap-2 mb-2">
              <i className="fa-solid fa-arrow-up text-orange-600"></i>
              <p className="text-sm font-semibold text-gray-700">Karung Dituang</p>
            </div>
            <p className="text-3xl font-bold text-orange-600">{formatNumber(saldoData.feedUse)}</p>
            <p className="text-xs text-gray-400 mt-1">karung</p>
          </div>

          {/* Karung Keluar */}
          <div className="text-center">
            <div className="flex items-center justify-center gap-2 mb-2">
              <i className="fa-solid fa-arrow-right text-red-600"></i>
              <p className="text-sm font-semibold text-gray-700">Karung Keluar</p>
            </div>
            <p className="text-3xl font-bold text-red-600">{formatNumber(saldoData.keluar)}</p>
            <p className="text-xs text-gray-400 mt-1">karung</p>
          </div>

          {/* Saldo */}
          <div className="text-center lg:border-l-2 lg:border-blue-200 lg:pl-6">
            <div className="flex items-center justify-center gap-2 mb-2">
              <i className="fa-solid fa-scale-balanced text-blue-600"></i>
              <p className="text-sm font-semibold text-gray-700">Saldo</p>
            </div>
            <p className={`text-4xl font-bold ${getSaldoStatusColor(saldoData.saldo)}`}>
              {formatNumber(saldoData.saldo)}
            </p>
            <p className="text-xs text-gray-400 mt-1">karung</p>
          </div>
        </div>
        <p className="text-xs text-gray-400 mt-4 text-center">
          Saldo = karung masuk − karung dituang − karung keluar.
        </p>
      </div>

      {/* Warning for negative saldo */}
      {saldoData.saldo < 0 && (
        <div className="mt-4 bg-yellow-50 border border-yellow-200 rounded-lg p-3 flex items-start gap-2">
          <i className="fa-solid fa-triangle-exclamation text-yellow-600 mt-0.5"></i>
          <p className="text-xs text-yellow-800">
            <strong>Peringatan:</strong> Saldo negatif menunjukkan karung dituang lebih banyak dari
            karung masuk. Periksa kembali data sinkronisasi karung-web-admin.
          </p>
        </div>
      )}
    </div>
  );
};

export default FeedSaldoCard;