import React, { useState, useEffect } from 'react';
import { X, Info, CheckCircle, AlertTriangle, MessageSquare, Calendar, ChevronDown, ChevronUp, Wallet, ArrowLeft, RefreshCw, CreditCard } from 'lucide-react';
import { Button } from './Button';

interface FeedbackModalProps {
  isOpen: boolean;
  onClose: () => void;
  onSubmit: (feedbackData: any) => Promise<void>;
  loading: boolean;
  order?: any;
}

export const FeedbackModal: React.FC<FeedbackModalProps> = ({ isOpen, onClose, onSubmit, loading, order }) => {
  // --- STATE ---
  const [mainDecision, setMainDecision] = useState<'approved' | 'minor' | 'major' | null>(null);
  const [showPayment, setShowPayment] = useState(false);
  
  // Approval Flow
  const [approvalConfirmed, setApprovalConfirmed] = useState(false);

  // Revision Flow
  const [designCheckboxes, setDesignCheckboxes] = useState<string[]>([]);
  const [designText, setDesignText] = useState('');
  
  const [contentCheckboxes, setContentCheckboxes] = useState<string[]>([]);
  const [contentText, setContentText] = useState('');

  const [structureCheckboxes, setStructureCheckboxes] = useState<string[]>([]);
  const [structureText, setStructureText] = useState('');

  const [funcCheckboxes, setFuncCheckboxes] = useState<string[]>([]);
  const [funcText, setFuncText] = useState('');

  const [priorityText, setPriorityText] = useState('');
  
  const [deadlineType, setDeadlineType] = useState<'none' | 'date' | 'discuss'>('none');
  const [deadlineDate, setDeadlineDate] = useState('');

  const [extraNotes, setExtraNotes] = useState('');
  
  const [revisionConfirmed, setRevisionConfirmed] = useState(false);

  useEffect(() => {
    if (isOpen) {
      setMainDecision(null);
      setShowPayment(false);
      setApprovalConfirmed(false);
      setRevisionConfirmed(false);
      // Reset other fields if needed
    }
  }, [isOpen]);

  if (!isOpen) return null;

  // --- LOGIC ---
  const paymentDetails = order?.details?.payment_summary;
  const totalAmount = paymentDetails?.total || 0;
  const advanceAmount = paymentDetails?.advance || 0;
  const remainingAmount = paymentDetails?.remaining || 0;
  const isCustomPrice = paymentDetails?.is_custom;
  
  // We show payment step ONLY if Approved AND there is a remaining amount AND it's not custom price (unless handled)
  const shouldShowPaymentStep = mainDecision === 'approved' && remainingAmount > 0 && !isCustomPrice;

  // --- HANDLERS ---
  const handleCheckbox = (
    currentList: string[], 
    setList: React.Dispatch<React.SetStateAction<string[]>>, 
    value: string,
    noneValue: string
  ) => {
    if (value === noneValue) {
      if (currentList.includes(noneValue)) {
        setList([]);
      } else {
        setList([noneValue]);
      }
    } else {
      let newList = currentList.filter(item => item !== noneValue);
      if (newList.includes(value)) {
        newList = newList.filter(item => item !== value);
      } else {
        newList = [...newList, value];
      }
      setList(newList);
    }
  };

  const isRevision = mainDecision === 'minor' || mainDecision === 'major';

  const handleSubmit = () => {
    const feedbackData = {
      decision: mainDecision,
      submittedAt: new Date().toISOString(),
      approval: mainDecision === 'approved' ? {
        confirmed: approvalConfirmed,
        paymentComplete: showPayment // Flag that payment step was shown
      } : null,
      revision: isRevision ? {
        design: { selected: designCheckboxes, comment: designText },
        content: { selected: contentCheckboxes, comment: contentText },
        structure: { selected: structureCheckboxes, comment: structureText },
        functionality: { selected: funcCheckboxes, comment: funcText },
        priority: priorityText,
        deadline: { type: deadlineType, date: deadlineDate },
        extraNotes: extraNotes,
        confirmed: revisionConfirmed
      } : null
    };
    
    onSubmit(feedbackData);
  };

  const handleProceedToPayment = () => {
    setShowPayment(true);
  };

  const commonInputStyles = "w-full p-4 border border-gray-300 rounded-xl text-sm font-medium text-black placeholder-gray-400 focus:ring-4 focus:ring-primary/10 focus:border-primary outline-none bg-white transition-all shadow-sm";
  const formatPrice = (num: number) => num.toLocaleString('hu-HU') + ' Ft';

  const renderFeedbackCategory = (
    title: string,
    options: string[],
    selected: string[],
    setSelected: React.Dispatch<React.SetStateAction<string[]>>,
    textValue: string,
    setTextValue: React.Dispatch<React.SetStateAction<string>>,
    placeholder: string
  ) => {
    const noneOption = options[options.length - 1];
    const showTextarea = selected.length > 0 && !selected.includes(noneOption);

    return (
      <div className="mb-6 bg-gray-50/50 p-6 rounded-2xl border border-gray-100 shadow-sm">
        <h4 className="font-bold text-gray-800 mb-4 text-sm uppercase tracking-widest">{title}</h4>
        <div className="grid grid-cols-1 sm:grid-cols-2 gap-3 mb-4">
          {options.map(opt => (
            <label key={opt} className={`flex items-center space-x-3 p-3 rounded-xl cursor-pointer border-2 transition-all ${selected.includes(opt) ? 'bg-white border-primary shadow-md' : 'bg-white/50 border-transparent hover:border-gray-200'}`}>
              <input 
                type="checkbox" 
                checked={selected.includes(opt)}
                onChange={() => handleCheckbox(selected, setSelected, opt, noneOption)}
                className="rounded text-primary focus:ring-primary w-5 h-5 border-gray-300"
              />
              <span className={`text-sm font-semibold ${selected.includes(opt) ? 'text-primary' : 'text-gray-600'}`}>{opt}</span>
            </label>
          ))}
        </div>
        {showTextarea && (
          <textarea
            value={textValue}
            onChange={(e) => setTextValue(e.target.value)}
            className={`${commonInputStyles} animate-fade-in mt-2`}
            rows={3}
            placeholder={placeholder}
          ></textarea>
        )}
      </div>
    );
  };

  return (
    <div className="fixed inset-0 z-[100] flex items-center justify-center p-4 bg-gray-900/75 backdrop-blur-sm overflow-y-auto">
      <div className="bg-white rounded-3xl shadow-2xl w-full max-w-3xl flex flex-col my-8 relative animate-fade-in-up border border-white/20 min-h-[600px]">
        
        <button onClick={onClose} className="absolute top-6 right-6 p-2 hover:bg-gray-100 rounded-full transition-colors z-10 bg-white shadow-sm border border-gray-100">
          <X className="w-5 h-5 text-gray-500" />
        </button>

        {showPayment ? (
          /* PAYMENT SUMMARY VIEW */
          <div className="flex flex-col h-full animate-fade-in">
             <div className="p-8 border-b border-gray-100 bg-gradient-to-r from-blue-50/50 to-purple-50/50 rounded-t-3xl">
                <div className="flex items-center gap-4">
                   <button onClick={() => setShowPayment(false)} className="p-2 bg-white rounded-xl shadow-sm border border-gray-100 hover:bg-gray-50 transition-colors text-gray-600">
                      <ArrowLeft className="w-5 h-5" />
                   </button>
                   <div>
                      <h2 className="text-2xl font-black text-gray-900 tracking-tighter">Véglegesítés & Fizetés</h2>
                      <p className="text-sm text-gray-500 font-medium mt-1">A fennmaradó összeg rendezése a projekt lezárásához.</p>
                   </div>
                </div>
             </div>

             <div className="p-8 md:p-12 flex-grow space-y-10">
                <div className="text-center">
                   <div className="w-20 h-20 bg-green-50 rounded-3xl flex items-center justify-center mx-auto mb-6 text-green-600 shadow-sm border border-green-100">
                      <Wallet className="w-10 h-10" />
                   </div>
                   <h3 className="text-xl font-bold text-gray-900 mb-2">Projekt Elszámolás</h3>
                   <p className="text-gray-500 text-sm max-w-md mx-auto">A demó oldal jóváhagyásával a projekt a befejező szakaszba lép. Kérjük, egyenlítse ki a fennmaradó összeget.</p>
                </div>

                <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                   <div className="bg-gray-50 p-6 rounded-[24px] border border-gray-100 flex flex-col items-center text-center">
                      <p className="text-[10px] font-black text-gray-400 uppercase tracking-widest mb-2">Projekt Teljes Ára</p>
                      <p className="text-lg font-bold text-gray-900">{formatPrice(totalAmount)}</p>
                   </div>
                   <div className="bg-green-50/50 p-6 rounded-[24px] border border-green-100 flex flex-col items-center text-center">
                      <p className="text-[10px] font-black text-green-600 uppercase tracking-widest mb-2">Már Befizetve (Előleg)</p>
                      <p className="text-lg font-bold text-green-700">{formatPrice(advanceAmount)}</p>
                   </div>
                </div>

                <div className="bg-primary/5 p-10 rounded-[32px] border-2 border-primary/20 text-center shadow-xl shadow-primary/5 relative overflow-hidden">
                   <div className="absolute -top-10 -right-10 w-40 h-40 bg-primary/10 rounded-full blur-3xl"></div>
                   <p className="text-[11px] font-black text-primary uppercase tracking-[0.3em] mb-4">Most Fizetendő (Fennmaradó)</p>
                   <div className="text-4xl md:text-5xl font-black text-primary mb-6 tracking-tighter">
                      {formatPrice(remainingAmount)}
                   </div>
                   <div className="flex justify-center">
                      <Button 
                        onClick={handleSubmit} 
                        disabled={loading} 
                        className="font-black uppercase text-[10px] tracking-widest px-12 py-4 h-auto shadow-2xl shadow-primary/40"
                      >
                        {loading ? <RefreshCw className="w-4 h-4 animate-spin mr-2" /> : <CreditCard className="w-4 h-4 mr-2" />}
                        FIZETÉS & JÓVÁHAGYOM
                      </Button>
                   </div>
                </div>

                <div className="bg-amber-50 border border-amber-200 p-6 rounded-2xl flex gap-4">
                   <div className="shrink-0"><Info className="w-5 h-5 text-amber-500" /></div>
                   <p className="text-xs text-amber-800 font-medium leading-relaxed">
                      <strong>Fontos:</strong> A befizetés után a rendszer automatikusan kiállítja a végszámlát és elküldi e-mailben. A fejlesztő csapat értesítést kap a jóváhagyásról és megkezdi a végleges élesítést.
                   </p>
                </div>
             </div>
          </div>
        ) : (
          /* STANDARD FEEDBACK FORM */
          <>
            <div className="p-8 border-b border-gray-100 bg-gradient-to-r from-blue-50/50 to-purple-50/50 rounded-t-3xl">
              <div className="flex items-start gap-4">
                <div className="bg-white p-3 rounded-2xl shadow-md text-primary border border-gray-100">
                  <MessageSquare className="w-6 h-6" />
                </div>
                <div>
                  <h2 className="text-2xl font-black text-gray-900 tracking-tighter">Visszajelzés a Weboldalról</h2>
                  <p className="text-sm text-gray-500 font-medium mt-1">A bemutató verzió alapján kérjük jelezd, ha valamit módosítanál.</p>
                </div>
              </div>
            </div>

            <div className="p-8 md:p-10 space-y-10 flex-grow overflow-y-auto">
              <div>
                <h3 className="text-lg font-bold text-gray-900 mb-5 flex items-center gap-2">
                   Döntés a továbblépésről <span className="text-red-500">*</span>
                </h3>
                <div className="grid grid-cols-1 gap-4">
                  {[
                    { id: 'approved', label: 'Igen, jóváhagyom a terveket', color: 'green', icon: '✅' },
                    { id: 'minor', label: 'Alapvetően jó, de kisebb javításokat kérek', color: 'yellow', icon: '🔧' },
                    { id: 'major', label: 'Nem megfelelő, jelentős módosításra van szükség', color: 'red', icon: '❌' }
                  ].map(opt => (
                    <label key={opt.id} className={`flex items-center p-5 border-2 rounded-2xl cursor-pointer transition-all ${mainDecision === opt.id ? `border-${opt.color}-500 bg-${opt.color}-50 shadow-lg ring-1 ring-${opt.color}-500` : 'border-gray-100 hover:border-gray-200'}`}>
                      <input 
                        type="radio" 
                        name="decision" 
                        checked={mainDecision === opt.id} 
                        onChange={() => setMainDecision(opt.id as any)}
                        className={`w-6 h-6 text-${opt.color}-600 focus:ring-${opt.color}-500 border-gray-300`}
                      />
                      <span className="ml-4 font-bold text-gray-900">{opt.icon} {opt.label}</span>
                    </label>
                  ))}
                </div>
              </div>

              {mainDecision === 'approved' && (
                <div className="animate-fade-in bg-green-50 p-6 rounded-2xl border-2 border-green-200 shadow-inner">
                  <h3 className="text-green-900 font-black mb-4 flex items-center gap-2 uppercase text-sm tracking-widest">
                    <CheckCircle className="w-5 h-5" /> Megerősítés
                  </h3>
                  <label className="flex items-start cursor-pointer group">
                    <input 
                      type="checkbox" 
                      checked={approvalConfirmed}
                      onChange={(e) => setApprovalConfirmed(e.target.checked)}
                      className="mt-1 w-6 h-6 text-green-600 rounded-lg focus:ring-green-500 border-green-300"
                    />
                    <span className="ml-4 text-sm text-green-800 font-bold leading-relaxed">
                      Tudomásul veszem, hogy a jóváhagyással elfogadom a jelenlegi állapotot, és a folyamat a végleges elszámolással folytatódik.
                    </span>
                  </label>
                </div>
              )}

              {isRevision && (
                <div className="animate-fade-in space-y-8 border-t border-gray-100 pt-10">
                  
                  {renderFeedbackCategory(
                    "Dizájn módosítások",
                    ["Színek", "Betűtípusok", "Elrendezés", "Képek / Illusztrációk", "Nem szeretnék dizájn módosítást"],
                    designCheckboxes, setDesignCheckboxes,
                    designText, setDesignText,
                    "Írd le pontosan, mit változtatnál a megjelenésen..."
                  )}

                  {renderFeedbackCategory(
                    "Tartalmi változtatások",
                    ["Szövegek stílusa", "Adatok pontosítása", "Hiányzó tartalom", "Nem szeretnék tartalmi módosítást"],
                    contentCheckboxes, setContentCheckboxes,
                    contentText, setContentText,
                    "Írd le a szöveges módosításokat..."
                  )}

                  <div>
                    <h3 className="text-sm font-black text-gray-900 mb-3 uppercase tracking-widest">Mi a legfontosabb kérésed? <span className="text-red-500">*</span></h3>
                    <textarea
                      value={priorityText}
                      onChange={(e) => setPriorityText(e.target.value)}
                      className={commonInputStyles}
                      rows={2}
                      placeholder="A legkritikusabb pont, amin változtatni kell..."
                    ></textarea>
                  </div>

                  <div>
                    <h3 className="text-sm font-black text-gray-900 mb-3 uppercase tracking-widest">Egyéb észrevételek</h3>
                    <textarea
                      value={extraNotes}
                      onChange={(e) => setExtraNotes(e.target.value)}
                      className={commonInputStyles}
                      rows={4}
                      placeholder="Bármi egyéb megjegyzés..."
                    ></textarea>
                  </div>

                  <div className="bg-yellow-50 p-6 rounded-2xl border-2 border-yellow-200 shadow-inner">
                    <label className="flex items-start cursor-pointer">
                      <input 
                        type="checkbox" 
                        checked={revisionConfirmed}
                        onChange={(e) => setRevisionConfirmed(e.target.checked)}
                        className="mt-1 w-6 h-6 text-yellow-600 rounded-lg focus:ring-yellow-500 border-yellow-300"
                      />
                      <span className="ml-4 text-sm text-yellow-900 font-bold leading-relaxed">
                        Tudomásul veszem, hogy a kért módosítások feldolgozása után kollégáik keresni fognak az újabb verzióval.
                      </span>
                    </label>
                  </div>

                </div>
              )}
            </div>

            <div className="p-8 border-t border-gray-100 bg-gray-50/50 rounded-b-3xl flex flex-col sm:flex-row justify-end gap-4">
              <Button variant="white" onClick={onClose} disabled={loading} className="px-10 border-gray-200">Mégse</Button>
              
              {mainDecision === 'approved' && (
                shouldShowPaymentStep ? (
                  <Button 
                    onClick={handleProceedToPayment} 
                    disabled={loading || !approvalConfirmed}
                    className="bg-primary hover:bg-primary-dark text-white font-black uppercase tracking-widest px-10 shadow-lg shadow-primary/20"
                  >
                    Tovább a fizetéshez
                  </Button>
                ) : (
                  <Button 
                    onClick={handleSubmit} 
                    disabled={loading || !approvalConfirmed}
                    className="bg-green-600 hover:bg-green-700 text-white font-black uppercase tracking-widest px-10 shadow-lg shadow-green-200"
                  >
                    {loading ? 'Küldés...' : 'Végleges Jóváhagyás'}
                  </Button>
                )
              )}

              {isRevision && (
                <Button 
                  onClick={handleSubmit} 
                  disabled={loading || !revisionConfirmed || !priorityText.trim()}
                  className="font-black uppercase tracking-widest px-10 shadow-lg shadow-primary/20"
                >
                  {loading ? 'Küldés...' : 'Visszajelzés Elküldése'}
                </Button>
              )}

              {!mainDecision && (
                <Button disabled className="opacity-50 cursor-not-allowed font-black uppercase tracking-widest px-10">
                  Válasszon opciót
                </Button>
              )}
            </div>
          </>
        )}
      </div>
    </div>
  );
};