import React, { useState, useEffect, useMemo } from 'react';
import { FeedingEvent } from '../../types';
import { useAppContext } from '../../context/AppContext.tsx';

interface FeedScheduleFormModalProps {
  isOpen: boolean;
  onClose: () => void;
  onSave: (eventData: Omit<FeedingEvent, 'id' | 'status'>, id?: string) => void;
  eventToEdit: FeedingEvent | null;
  initialDate: Date;
}

const FeedScheduleFormModal: React.FC<FeedScheduleFormModalProps> = ({
  isOpen,
  onClose,
  onSave,
  eventToEdit,
  initialDate,
}) => {
  const { users, roles } = useAppContext();

  const operators = useMemo(() => {
    const operatorRoleId = roles.find((r) => r.name === 'Operator')?.id;
    if (!operatorRoleId) return [];
    return users.filter((u) => u.roleId === operatorRoleId);
  }, [users, roles]);

  const [time, setTime] = useState('08:00');
  const [type, setType] = useState<'AI Recommended' | 'Manual'>('Manual');
  const [operatorId, setOperatorId] = useState(operators[0]?.id || '');
  const [feedType, setFeedType] = useState('CP 511 Bravo');
  const [quantityKg, setQuantityKg] = useState('250');

  useEffect(() => {
    if (eventToEdit) {
      const eventTime = eventToEdit.time;
      setTime(
        `${String(eventTime.getHours()).padStart(2, '0')}:${String(eventTime.getMinutes()).padStart(2, '0')}`
      );
      if (eventToEdit.type === 'AI Recommended' || eventToEdit.type === 'Manual') {
        setType(eventToEdit.type);
      }
      setOperatorId(eventToEdit.operatorId);
      setFeedType(eventToEdit.feedType);
      setQuantityKg(String(eventToEdit.quantityKg));
    } else {
      setTime('08:00');
      setType('Manual');
      setOperatorId(operators[0]?.id || '');
      setFeedType('CP 511 Bravo');
      setQuantityKg('250');
    }
  }, [eventToEdit, operators]);

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    const [hours = 0, minutes = 0] = time.split(':').map(Number);
    const eventDate = eventToEdit ? new Date(eventToEdit.time) : new Date(initialDate);
    eventDate.setHours(hours, minutes, 0, 0);

    const operator = operators.find((o) => o.id === operatorId);
    if (!operator) return;

    const kg = parseInt(quantityKg, 10);

    onSave(
      {
        time: eventDate,
        type,
        operatorId,
        operatorName: operator.name,
        feedType,
        quantityKg: kg,
        quantitySacks: Math.round(kg / 50),
      },
      eventToEdit?.id
    );
  };

  if (!isOpen) return null;

  return (
    <div
      className="fixed inset-0 bg-black bg-opacity-60 flex justify-center items-center z-50 p-4"
      onClick={onClose}
    >
      <div
        className="bg-white rounded-xl shadow-2xl w-full max-w-lg"
        onClick={(e) => e.stopPropagation()}
      >
        <form onSubmit={handleSubmit}>
          <div className="p-6">
            <div className="flex justify-between items-center mb-6">
              <h2 className="text-2xl font-bold text-gray-800">
                {eventToEdit ? 'Edit Jadwal Pakan' : 'Tambah Jadwal Pakan'}
              </h2>
              <button
                type="button"
                onClick={onClose}
                className="text-gray-400 hover:text-gray-600 text-2xl"
              >
                &times;
              </button>
            </div>
            <div className="space-y-4">
              <div>
                <label className="block text-sm font-medium text-gray-700 mb-1">Tanggal</label>
                <input
                  type="text"
                  readOnly
                  value={(eventToEdit ? eventToEdit.time : initialDate).toLocaleDateString(
                    'id-ID',
                    { weekday: 'long', day: 'numeric', month: 'long' }
                  )}
                  className="w-full px-3 py-2 border border-gray-300 rounded-md bg-gray-100"
                />
              </div>
              <div>
                <label
                  htmlFor="operatorId"
                  className="block text-sm font-medium text-gray-700 mb-1"
                >
                  Petugas
                </label>
                <select
                  id="operatorId"
                  value={operatorId}
                  onChange={(e) => setOperatorId(e.target.value)}
                  className="w-full px-3 py-2 border border-gray-300 rounded-md bg-white"
                  required
                >
                  {operators.map((o) => (
                    <option key={o.id} value={o.id}>
                      {o.name}
                    </option>
                  ))}
                </select>
              </div>
              <div className="grid grid-cols-2 gap-4">
                <div>
                  <label htmlFor="time" className="block text-sm font-medium text-gray-700 mb-1">
                    Waktu
                  </label>
                  <input
                    type="time"
                    id="time"
                    value={time}
                    onChange={(e) => setTime(e.target.value)}
                    className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm"
                    required
                  />
                </div>
                <div>
                  <label htmlFor="type" className="block text-sm font-medium text-gray-700 mb-1">
                    Tipe
                  </label>
                  <select
                    id="type"
                    value={type}
                    onChange={(e) => setType(e.target.value as 'AI Recommended' | 'Manual')}
                    className="w-full px-3 py-2 border border-gray-300 rounded-md bg-white"
                  >
                    <option value="Manual">Manual</option>
                    <option value="AI Recommended">AI Recommended</option>
                  </select>
                </div>
              </div>
              <div className="grid grid-cols-2 gap-4">
                <div>
                  <label
                    htmlFor="feedType"
                    className="block text-sm font-medium text-gray-700 mb-1"
                  >
                    Jenis Pakan
                  </label>
                  <input
                    type="text"
                    id="feedType"
                    value={feedType}
                    onChange={(e) => setFeedType(e.target.value)}
                    className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm"
                    required
                  />
                </div>
                <div>
                  <label
                    htmlFor="quantityKg"
                    className="block text-sm font-medium text-gray-700 mb-1"
                  >
                    Jumlah (Kg)
                  </label>
                  <input
                    type="number"
                    id="quantityKg"
                    value={quantityKg}
                    onChange={(e) => setQuantityKg(e.target.value)}
                    className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm"
                    required
                    min="1"
                  />
                </div>
              </div>
            </div>
          </div>
          <div className="bg-gray-50 px-6 py-4 rounded-b-xl flex justify-end space-x-3">
            <button
              type="button"
              onClick={onClose}
              className="bg-gray-200 text-gray-700 px-4 py-2 rounded-lg hover:bg-gray-300 font-medium"
            >
              Batal
            </button>
            <button
              type="submit"
              className="bg-red-600 text-white px-4 py-2 rounded-lg hover:bg-red-700 font-medium shadow-sm"
            >
              Simpan Jadwal
            </button>
          </div>
        </form>
      </div>
    </div>
  );
};

export default FeedScheduleFormModal;