'use client';

import { useState } from 'react';
import { Collection } from '@/lib/types';
import { cn, formatCurrency } from '@/lib/utils';
import { X, Minus, Plus } from 'lucide-react';

interface CollectModalProps {
  collection: Collection | null;
  isOpen: boolean;
  onClose: () => void;
  onConfirm: (collection: Collection, receivedQty: number, notes: string) => void;
}

export default function CollectModal({
  collection,
  isOpen,
  onClose,
  onConfirm,
}: CollectModalProps) {
  const [receivedQty, setReceivedQty] = useState<string>('');
  const [notes, setNotes] = useState('');
  const [error, setError] = useState('');

  if (!isOpen || !collection) return null;

  const expectedQty = collection.quantity || collection.expand?.order_item?.quantity || 0;

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    setError('');

    const qty = parseFloat(receivedQty);
    if (isNaN(qty) || qty <= 0) {
      setError('Please enter a valid quantity');
      return;
    }

    onConfirm(collection, qty, notes);
    setReceivedQty('');
    setNotes('');
    setError('');
  };

  const adjustQty = (delta: number) => {
    const current = parseFloat(receivedQty) || 0;
    const newQty = Math.max(0, current + delta);
    setReceivedQty(newQty.toString());
  };

  const isPartial = parseFloat(receivedQty) > 0 && parseFloat(receivedQty) < expectedQty;

  return (
    <div className="fixed inset-0 z-50 flex items-end sm:items-center justify-center">
      <div className="absolute inset-0 bg-black/50 backdrop-blur-sm" onClick={onClose} />
      <div className="relative bg-white rounded-t-2xl sm:rounded-2xl w-full max-w-md p-6 animate-slide-up">
        <div className="flex items-center justify-between mb-4">
          <h2 className="text-lg font-bold">Collect Item</h2>
          <button
            onClick={onClose}
            className="p-1 rounded-full hover:bg-gray-100 active:bg-gray-200 transition-colors"
          >
            <X size={20} />
          </button>
        </div>

        <div className="mb-4 p-3 bg-gray-50 rounded-lg">
          <p className="text-sm font-medium truncate">
            {collection.is_manual
              ? collection.description
              : collection.expand?.order_item?.description || 'Unknown item'}
          </p>
          <p className="text-xs text-gray-500 mt-1">
            Expected: {expectedQty} {collection.unit || collection.expand?.order_item?.unit || 'units'}
          </p>
          {collection.expand?.order_item?.selling_price && (
            <p className="text-xs text-green-600 mt-1">
              Unit price: {formatCurrency(collection.expand.order_item.selling_price)}
            </p>
          )}
        </div>

        <form onSubmit={handleSubmit}>
          <div className="mb-4">
            <label className="block text-sm font-medium text-gray-700 mb-2">
              Received Quantity *
            </label>
            <div className="flex items-center gap-2">
              <button
                type="button"
                onClick={() => adjustQty(-1)}
                className="p-3 rounded-lg bg-gray-100 active:bg-gray-200 transition-colors"
              >
                <Minus size={18} />
              </button>
              <input
                type="number"
                step="0.01"
                inputMode="decimal"
                value={receivedQty}
                onChange={(e) => setReceivedQty(e.target.value)}
                className="flex-1 p-3 text-center text-lg font-semibold border border-gray-300 rounded-lg focus:ring-2 focus:ring-orange-500 focus:border-transparent"
                placeholder="0.00"
                autoFocus
              />
              <button
                type="button"
                onClick={() => adjustQty(1)}
                className="p-3 rounded-lg bg-gray-100 active:bg-gray-200 transition-colors"
              >
                <Plus size={18} />
              </button>
            </div>
            {isPartial && (
              <p className="text-xs text-amber-600 mt-1">
                Partial collection: {receivedQty} of {expectedQty} units
              </p>
            )}
            {error && <p className="text-xs text-red-500 mt-1">{error}</p>}
          </div>

          <div className="mb-4">
            <label className="block text-sm font-medium text-gray-700 mb-2">
              Notes (optional)
            </label>
            <textarea
              value={notes}
              onChange={(e) => setNotes(e.target.value)}
              className="w-full p-3 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-orange-500 focus:border-transparent resize-none"
              rows={2}
              placeholder="Add any notes..."
            />
          </div>

          <button
            type="submit"
            className={cn(
              'w-full py-3.5 px-4 rounded-xl text-white font-semibold text-base',
              'bg-green-500 active:bg-green-600 transition-colors',
              'touch-manipulation flex items-center justify-center gap-2'
            )}
          >
            Confirm Collection
          </button>
        </form>
      </div>
    </div>
  );
}