'use client';

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

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

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

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

  const expectedQty = item.order_qty || item.quantity || 0;
  const parsedQty = parseFloat(receivedQty) || 0;
  const isPartial = parsedQty > 0 && parsedQty < expectedQty;
  const isOverQty = parsedQty > expectedQty;

  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(item, qty, notes);
    setReceivedQty('');
    setNotes('');
    setError('');
  };

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

  return (
    <div className="fixed inset-0 z-50 flex items-end sm:items-center justify-center">
      <div className="absolute inset-0 bg-black/50 modal-overlay" onClick={onClose} />
      <div className="relative bg-white bottom-sheet w-full max-w-md p-6 animate-slide-up">
        {/* Drag indicator */}
        <div className="sm:hidden flex justify-center mb-4">
          <div className="w-10 h-1 bg-gray-300 rounded-full" />
        </div>

        <div className="flex items-center justify-between mb-5">
          <div className="flex items-center gap-2.5">
            <div className="w-8 h-8 bg-green-50 rounded-xl flex items-center justify-center">
              <Check size={18} className="text-green-600" />
            </div>
            <h2 className="text-lg font-bold text-gray-900">Collect Item</h2>
          </div>
          <button
            onClick={onClose}
            className="p-2 rounded-xl hover:bg-gray-100 active:bg-gray-200 transition-colors"
          >
            <X size={18} className="text-gray-400" />
          </button>
        </div>

        {/* Item info */}
        <div className="mb-5 p-4 bg-gray-50 rounded-xl">
          <p className="text-sm font-semibold text-gray-900 truncate">{item.description}</p>
          <div className="flex items-center gap-3 mt-1.5 text-xs text-gray-500">
            <span className="font-medium text-gray-700">
              {item.expand?.supplier?.suppliername || 'Unknown'}
            </span>
            <span>Expected: {expectedQty} units</span>
          </div>
          {item.selling_price && (
            <p className="text-xs text-green-600 font-medium mt-1">
              Unit price: {formatCurrency(item.selling_price)}
            </p>
          )}
        </div>

        <form onSubmit={handleSubmit} className="space-y-5">
          {/* Quantity */}
          <div>
            <label className="block text-sm font-semibold text-gray-700 mb-2">
              Received Quantity *
            </label>
            <div className="flex items-center gap-3">
              <button
                type="button"
                onClick={() => adjustQty(-1)}
                className="w-12 h-12 flex items-center justify-center rounded-xl bg-gray-100 active:bg-gray-200 transition-colors touch-manipulation press-feedback-sm"
              >
                <Minus size={18} className="text-gray-600" />
              </button>
              <input
                type="number"
                step="0.01"
                inputMode="decimal"
                value={receivedQty}
                onChange={(e) => { setReceivedQty(e.target.value); setError(''); }}
                className="w-20 text-center text-2xl font-bold py-3 border-2 border-gray-200 rounded-xl focus:ring-2 focus:ring-green-500/30 focus:border-green-500 transition-all"
                placeholder="0"
                autoFocus
              />
              <button
                type="button"
                onClick={() => adjustQty(1)}
                className="w-12 h-12 flex items-center justify-center rounded-xl bg-gray-100 active:bg-gray-200 transition-colors touch-manipulation press-feedback-sm"
              >
                <Plus size={18} className="text-gray-600" />
              </button>
              {expectedQty > 0 && (
                <button
                  type="button"
                  onClick={() => { setReceivedQty(expectedQty.toString()); setError(''); }}
                  className="px-3 py-2 text-xs font-medium text-green-700 bg-green-50 rounded-lg active:bg-green-100 transition-colors touch-manipulation"
                >
                  Full ({expectedQty})
                </button>
              )}
            </div>
            {isPartial && (
              <p className="text-xs text-amber-600 mt-2 font-medium">
                Partial collection: {parsedQty} of {expectedQty} units
              </p>
            )}
            {isOverQty && (
              <p className="text-xs text-blue-600 mt-2 font-medium">
                Over collection: {parsedQty} exceeds expected {expectedQty}
              </p>
            )}
            {error && <p className="text-xs text-red-500 mt-2">{error}</p>}
          </div>

          {/* Notes */}
          <div>
            <label className="block text-sm font-semibold text-gray-700 mb-2">
              Notes (optional)
            </label>
            <textarea
              value={notes}
              onChange={(e) => setNotes(e.target.value)}
              className="w-full p-3 text-sm bg-gray-50 border border-gray-200 rounded-xl focus:ring-2 focus:ring-green-500/30 focus:border-green-500 focus:bg-white transition-all resize-none selectable"
              rows={2}
              placeholder="Add any notes about this collection..."
            />
          </div>

          {/* Submit */}
          <button
            type="submit"
            className={cn(
              'w-full py-4 px-4 rounded-xl text-white font-semibold text-[15px]',
              'bg-green-500 active:bg-green-600 transition-all shadow-lg shadow-green-500/25',
              'touch-manipulation press-feedback',
              (!parsedQty || parsedQty < 0) && 'opacity-50'
            )}
          >
            Confirm Collection
          </button>
        </form>
      </div>
    </div>
  );
}