'use client';

import { useState } from 'react';
import { Camera, Barcode, Check, X, Sparkles, Plus } from 'lucide-react';
import { toast } from 'sonner';

interface BarcodeScannerModalProps {
  isOpen: boolean;
  onClose: () => void;
  onProductScanned: (product: { name: string; size: number; unit: string; priceCents: number }) => void;
}

const BARCODE_DATABASE: Record<string, { name: string; size: number; unit: string; priceCents: number }> = {
  '4008234567890': { name: 'Hafermilch Barista Bio (Oatly)', size: 1, unit: 'Liter', priceCents: 149 },
  '4012345678901': { name: 'Tofu Natur Bio (Taifun)', size: 200, unit: 'Gramm', priceCents: 199 },
  '4023456789012': { name: 'Spaghetti 500g (Barilla)', size: 500, unit: 'Gramm', priceCents: 189 },
  '4034567890123': { name: 'Bio Hefeflocken (Alnatura)', size: 200, unit: 'Gramm', priceCents: 299 },
  '4045678901234': { name: 'Strauchtomaten Bio', size: 500, unit: 'Gramm', priceCents: 229 },
};

export function BarcodeScannerModal({ isOpen, onClose, onProductScanned }: BarcodeScannerModalProps) {
  const [barcodeInput, setBarcodeInput] = useState('');
  const [scanning, setScanning] = useState(false);

  if (!isOpen) return null;

  const handleSimulateScan = (code: string) => {
    setScanning(true);
    setTimeout(() => {
      setScanning(false);
      const match = BARCODE_DATABASE[code] || {
        name: `Gescanntes Bio-Produkt (${code.slice(-4)})`,
        size: 1,
        unit: 'Stück',
        priceCents: 199,
      };

      onProductScanned(match);
      toast.success(`📷 Barcode gescannt: "${match.name}" erkannt! 🌱`);
      onClose();
    }, 800);
  };

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 p-4 backdrop-blur-md">
      <div className="w-full max-w-md rounded-3xl border border-border/60 bg-card p-6 shadow-2xl space-y-6">
        <div className="flex items-center justify-between">
          <h2 className="text-lg font-bold text-foreground flex items-center gap-2">
            <Camera className="h-5 w-5 text-emerald-500" />
            1-Klick Barcode Scanner
          </h2>
          <button onClick={onClose} className="rounded-full p-1 text-muted-foreground hover:bg-accent">
            <X className="h-5 w-5" />
          </button>
        </div>

        {/* Camera Scanner View Simulation */}
        <div className="relative overflow-hidden rounded-2xl bg-black p-8 text-center text-white space-y-4 border-2 border-emerald-500/50 shadow-inner">
          <div className="mx-auto flex h-20 w-20 items-center justify-center rounded-2xl bg-emerald-500/20 text-emerald-400 border border-emerald-500/40">
            <Barcode className={`h-12 w-12 ${scanning ? 'animate-pulse text-emerald-300' : ''}`} />
          </div>

          <p className="text-xs font-semibold text-emerald-200">
            {scanning ? 'Barcode wird dekodiert...' : 'Halte die Kamera über den Barcode oder wähle unten ein Produkt'}
          </p>

          <div className="absolute inset-x-0 top-1/2 border-b-2 border-rose-500/60 animate-pulse" />
        </div>

        {/* Quick Scan Preset Buttons */}
        <div className="space-y-2">
          <label className="block text-xs font-bold text-muted-foreground uppercase">
            Direkt-Scan testen:
          </label>
          <div className="grid grid-cols-2 gap-2">
            <button
              onClick={() => handleSimulateScan('4008234567890')}
              className="flex items-center gap-2 rounded-xl border border-emerald-500/30 bg-emerald-500/10 p-2.5 text-xs font-bold text-emerald-700 dark:text-emerald-300 hover:bg-emerald-600 hover:text-white transition-all text-left"
            >
              <span>🥛 Hafermilch</span>
            </button>

            <button
              onClick={() => handleSimulateScan('4012345678901')}
              className="flex items-center gap-2 rounded-xl border border-emerald-500/30 bg-emerald-500/10 p-2.5 text-xs font-bold text-emerald-700 dark:text-emerald-300 hover:bg-emerald-600 hover:text-white transition-all text-left"
            >
              <span>🧈 Taifun Tofu</span>
            </button>

            <button
              onClick={() => handleSimulateScan('4023456789012')}
              className="flex items-center gap-2 rounded-xl border border-emerald-500/30 bg-emerald-500/10 p-2.5 text-xs font-bold text-emerald-700 dark:text-emerald-300 hover:bg-emerald-600 hover:text-white transition-all text-left"
            >
              <span>🍝 Spaghetti 500g</span>
            </button>

            <button
              onClick={() => handleSimulateScan('4034567890123')}
              className="flex items-center gap-2 rounded-xl border border-emerald-500/30 bg-emerald-500/10 p-2.5 text-xs font-bold text-emerald-700 dark:text-emerald-300 hover:bg-emerald-600 hover:text-white transition-all text-left"
            >
              <span>🧀 Hefeflocken</span>
            </button>
          </div>
        </div>

        {/* Manual Barcode Code Entry */}
        <form
          onSubmit={e => {
            e.preventDefault();
            if (barcodeInput.trim()) handleSimulateScan(barcodeInput.trim());
          }}
          className="flex gap-2"
        >
          <input
            type="text"
            value={barcodeInput}
            onChange={e => setBarcodeInput(e.target.value)}
            placeholder="Barcode Nummer eingeben (z.B. 400823...)"
            className="flex-1 rounded-xl border border-input bg-background px-3.5 py-2.5 text-xs"
          />
          <button
            type="submit"
            className="rounded-xl bg-emerald-600 px-4 py-2.5 text-xs font-bold text-white hover:bg-emerald-500"
          >
            Scannen
          </button>
        </form>
      </div>
    </div>
  );
}