'use client';

import { useState, useEffect, useCallback } from 'react';
import { motion } from 'framer-motion';
import { useRouter } from 'next/navigation';
import {
  Calendar, Clock, CheckCircle, XCircle, Eye, Loader2, Search,
  MapPin, DollarSign, Home, ArrowLeft, CreditCard, Timer, Star,
} from 'lucide-react';
import toast, { Toaster } from 'react-hot-toast';
import AuthService from '../services/AuthService';
import { getRentProperties, getUserReservations, payDeposit } from '../utils/api';
import { addPropertyRating } from '../utils/ratings';

const API_BASE = process.env.NEXT_PUBLIC_API_URL || 'https://45.93.137.91.nip.io/api';

const STATUS_MAP = ['pending','ownerConfirmed','depositPaid','depositConfirmed','completed','cancelled'];

const STATUS_UI = {
  pending:          { label: 'قيد الانتظار', color: 'bg-yellow-100 text-yellow-800', icon: Clock },
  ownerConfirmed:   { label: 'مؤكد من المالك', color: 'bg-blue-100 text-blue-800', icon: CheckCircle },
  depositPaid:      { label: 'تم دفع السلفة', color: 'bg-indigo-100 text-indigo-800', icon: DollarSign },
  depositConfirmed: { label: 'مؤكد', color: 'bg-green-100 text-green-800', icon: CheckCircle },
  completed:        { label: 'منتهي', color: 'bg-green-100 text-green-800', icon: CheckCircle },
  cancelled:        { label: 'ملغي', color: 'bg-gray-100 text-gray-800', icon: XCircle },
};

function statusLabel(code) { return STATUS_UI[STATUS_MAP[code]]?.label ?? String(code); }
function statusColor(code) { return STATUS_UI[STATUS_MAP[code]]?.color ?? 'bg-gray-100 text-gray-700'; }
function statusIcon(code) { return STATUS_UI[STATUS_MAP[code]]?.icon ?? Clock; }

function StatusBadge({ code }) {
  const Icon = statusIcon(code);
  return (
    <span className={`inline-flex items-center gap-1 px-2 py-1 rounded-lg text-xs font-medium ${statusColor(code)}`}>
      <Icon className="w-3 h-3" /> {statusLabel(code)}
    </span>
  );
}

const propAddr = (p, r) => p?.address ?? r?.propertyAddress ?? '';
const propImages = (p, r) => {
  if (p?.images && Array.isArray(p.images)) return p.images;
  if (r?.property?.images && Array.isArray(r.property.images)) return r.property.images;
  return [];
};
const propBeds = (p, r) => p?.numberOfBedRooms ?? r?.property?.numberOfBedRooms ?? 0;
const propBaths = (p, r) => p?.numberOfBathRooms ?? r?.property?.numberOfBathRooms ?? 0;

function parseTimeSpan(str) {
  if (!str) return 0;
  const clean = str.replace(/-/g, '');
  const dotIdx = clean.indexOf('.');
  let days = 0, timePart = clean;
  if (dotIdx !== -1) {
    days = parseInt(clean.substring(0, dotIdx), 10) || 0;
    timePart = clean.substring(dotIdx + 1);
  }
  const parts = timePart.split(':');
  if (parts.length < 2) return days * 86400000;
  const hh = parseInt(parts[0], 10) || 0;
  const mm = parseInt(parts[1], 10) || 0;
  const ss = parts.length > 2 ? (parseInt(parts[2], 10) || 0) : 0;
  return ((days * 86400) + (hh * 3600) + (mm * 60) + ss) * 1000;
}

function formatWindowDuration(str) {
  if (!str) return '';
  const clean = str.replace(/-/g, '');
  const dotIdx = clean.indexOf('.');
  let totalHours = 0, timePart = clean;
  if (dotIdx !== -1) {
    const days = parseInt(clean.substring(0, dotIdx), 10) || 0;
    totalHours += days * 24;
    timePart = clean.substring(dotIdx + 1);
  }
  const parts = timePart.split(':');
  if (parts.length >= 2) {
    totalHours += parseInt(parts[0], 10) || 0;
  }
  if (totalHours > 0) return `${String(totalHours).padStart(2, '0')}:00:00`;
  return timePart.substring(0, 8);
}

function CountdownTimer({ deadline }) {
  const [remaining, setRemaining] = useState(deadline ? Math.max(0, deadline - Date.now()) : 0);
  useEffect(() => {
    if (!deadline) return;
    const tick = () => setRemaining(Math.max(0, deadline - Date.now()));
    tick();
    const id = setInterval(tick, 1000);
    return () => clearInterval(id);
  }, [deadline]);
  if (remaining <= 0) return <span className="text-red-500 text-sm font-medium">انتهت المهلة</span>;
  const h = Math.floor(remaining / 3600000);
  const m = Math.floor((remaining % 3600000) / 60000);
  const s = Math.floor((remaining % 60000) / 1000);
  const pad = (n) => String(n).padStart(2, '0');
  return <span className="text-amber-600 text-sm font-mono font-bold" dir="ltr">{pad(h)}:{pad(m)}:{pad(s)}</span>;
}

function ReservationCard({ r, onViewDetails, onPay, payingId }) {
  const p = r._prop;
  const imgs = propImages(p, r);
  const img = imgs.length > 0 ? `${API_BASE}${imgs[0]}` : null;
  const addr = propAddr(p, r);
  const beds = propBeds(p, r);
  const baths = propBaths(p, r);
  const isOwnerConfirmed = STATUS_MAP[r.status] === 'ownerConfirmed';
  const canRate = STATUS_MAP[r.status] === 'depositPaid' || STATUS_MAP[r.status] === 'completed';
  const hasTimeWindow = r.ownerApprovalDate && p?.allowedPaymentPeriod;
  const deadline = hasTimeWindow
    ? new Date(r.ownerApprovalDate).getTime() + parseTimeSpan(p.allowedPaymentPeriod)
    : null;
  const isExpired = deadline ? Date.now() > deadline : false;
  const isPaying = payingId === r.id;
  const [showRating, setShowRating] = useState(false);
  const [ratingValue, setRatingValue] = useState(0);
  const [ratingComment, setRatingComment] = useState('');
  const [submittingRating, setSubmittingRating] = useState(false);

  return (
    <motion.div initial={{ opacity:0,y:20 }} animate={{ opacity:1,y:0 }}
      className="bg-white rounded-2xl shadow-sm hover:shadow-md transition-all border border-gray-200 overflow-hidden">
      <div className="p-5">
        {img && <div className="mb-4 w-full h-40 rounded-xl overflow-hidden"><img src={img} alt="" className="w-full h-full object-cover" /></div>}
        <div className="flex justify-between items-start mb-3">
          <div>
            <StatusBadge code={r.status} />
            {addr && <div className="flex items-center gap-1 text-gray-500 text-sm mt-1"><MapPin className="w-4 h-4"/>{addr}</div>}
          </div>
          <div className="text-left">
            <div className="text-lg font-bold text-amber-600">{r.totalPrice?.toLocaleString() ?? '—'}</div>
            <div className="text-xs text-gray-500">السعر الإجمالي</div>
          </div>
        </div>
        {(beds||baths) && <div className="flex gap-3 mb-3 text-sm text-gray-600">{beds>0&&<span>{beds} غرف</span>}{baths>0&&<span>{baths} حمامات</span>}</div>}
        <div className="grid grid-cols-2 gap-3 mb-4 text-center">
          <div className="bg-gray-50 p-2 rounded-lg">
            <Calendar className="w-4 h-4 text-amber-500 mx-auto mb-1"/><div className="text-xs text-gray-500">من</div>
            <div className="text-sm font-medium">{new Date(r.startDate).toLocaleDateString('ar')}</div>
          </div>
          <div className="bg-gray-50 p-2 rounded-lg">
            <Calendar className="w-4 h-4 text-amber-500 mx-auto mb-1"/><div className="text-xs text-gray-500">إلى</div>
            <div className="text-sm font-medium">{new Date(r.endDate).toLocaleDateString('ar')}</div>
          </div>
        </div>
        {isOwnerConfirmed && hasTimeWindow && <div className="bg-blue-50 p-3 rounded-xl mb-3">
          <div className="flex items-center justify-between mb-1">
            <span className="text-sm text-blue-800 font-medium flex items-center gap-1"><Timer className="w-4 h-4"/> متبقي للدفع:</span>
            <CountdownTimer deadline={deadline} />
          </div>
          <div className="text-xs text-blue-600">مدة الدفع: {formatWindowDuration(p.allowedPaymentPeriod)}</div>
        </div>}
        <div className="flex gap-3 pt-3 border-t border-gray-100">
          <button onClick={() => onViewDetails(r)}
            className="flex-1 bg-gray-100 text-gray-700 py-2 rounded-xl text-sm font-medium hover:bg-gray-200 transition-colors flex items-center justify-center gap-2">
            <Eye className="w-4 h-4"/> التفاصيل
          </button>
          {isOwnerConfirmed && !isExpired && <button onClick={() => onPay(r)} disabled={isPaying}
            className={`flex-1 py-2 rounded-xl text-sm font-medium transition-colors flex items-center justify-center gap-2 ${isPaying ? 'bg-gray-300 text-gray-500 cursor-not-allowed' : 'bg-amber-500 text-white hover:bg-amber-600'}`}>
            {isPaying ? <Loader2 className="w-4 h-4 animate-spin"/> : <CreditCard className="w-4 h-4"/>} {isPaying ? 'جاري الدفع...' : 'ادفع الآن'}
          </button>}
        </div>
        {canRate && !showRating && <button onClick={() => setShowRating(true)}
          className="w-full mt-3 bg-amber-50 text-amber-700 py-2 rounded-xl text-sm font-medium hover:bg-amber-100 transition-colors flex items-center justify-center gap-2">
          <Star className="w-4 h-4"/> قيّم هذا العقار
        </button>}
        {canRate && showRating && <div className="mt-3 bg-amber-50 p-3 rounded-xl">
          <div className="flex gap-1 justify-center mb-2">
            {[1,2,3,4,5].map(n => (
              <button key={n} onClick={() => setRatingValue(n)}
                className={`p-1 rounded-full transition-colors ${n <= ratingValue ? 'text-amber-500' : 'text-gray-300'}`}>
                <Star className={`w-6 h-6 ${n <= ratingValue ? 'fill-amber-500' : ''}`} />
              </button>
            ))}
          </div>
          <textarea value={ratingComment} onChange={e => setRatingComment(e.target.value)}
            placeholder="أكتب تعليقك (اختياري)"
            className="w-full p-2 text-sm border border-amber-200 rounded-lg resize-none focus:outline-none focus:ring-2 focus:ring-amber-500 mb-2" rows={2} />
          <div className="flex gap-2">
            <button onClick={async () => {
              if (!ratingValue) return toast.error('اختر تقييماً');
              setSubmittingRating(true);
              try {
                await addPropertyRating({ reservationId: r.id, cleanRating: ratingValue, servicesRating: ratingValue, ownerBehaviorRating: ratingValue, experienceRating: ratingValue, comment: ratingComment || null });
                toast.success('تم إرسال التقييم');
                setShowRating(false);
                setRatingValue(0);
                setRatingComment('');
              } catch (e) { toast.error(e?.message || 'فشل إرسال التقييم'); }
              finally { setSubmittingRating(false); }
            }} disabled={submittingRating}
              className="flex-1 bg-amber-500 text-white py-1.5 rounded-lg text-sm font-medium hover:bg-amber-600 transition-colors disabled:bg-gray-300">
              {submittingRating ? 'جاري الإرسال...' : 'إرسال التقييم'}
            </button>
            <button onClick={() => { setShowRating(false); setRatingValue(0); setRatingComment(''); }}
              className="px-4 py-1.5 bg-gray-200 text-gray-700 rounded-lg text-sm hover:bg-gray-300 transition-colors">إلغاء</button>
          </div>
        </div>}
      </div>
    </motion.div>
  );
}

function DetailsModal({ r, isOpen, onClose, onPay, payingId }) {
  if (!isOpen || !r) return null;
  const p = r._prop;
  const isOwnerConfirmed = STATUS_MAP[r.status] === 'ownerConfirmed';
  const hasTimeWindow = r.ownerApprovalDate && p?.allowedPaymentPeriod;
  const deadline = hasTimeWindow
    ? new Date(r.ownerApprovalDate).getTime() + parseTimeSpan(p.allowedPaymentPeriod)
    : null;
  const isExpired = deadline ? Date.now() > deadline : false;
  const isPaying = payingId === r.id;

  return (
    <motion.div initial={{opacity:0}} animate={{opacity:1}} exit={{opacity:0}}
      className="fixed inset-0 bg-black/50 backdrop-blur-sm flex items-center justify-center p-4 z-50" onClick={onClose}>
      <motion.div initial={{scale:0.9,y:20}} animate={{scale:1,y:0}} exit={{scale:0.9,y:20}}
        className="bg-white rounded-2xl w-full max-w-2xl max-h-[90vh] overflow-y-auto shadow-2xl" onClick={e=>e.stopPropagation()}>
        <div className="sticky top-0 bg-gradient-to-r from-amber-500 to-amber-600 p-6 text-white">
          <div className="flex justify-between items-center">
            <h2 className="text-xl font-bold">تفاصيل الحجز</h2>
            <button onClick={onClose} className="p-1 hover:bg-white/20 rounded-full"><XCircle className="w-6 h-6"/></button>
          </div>
          <p className="text-amber-100 text-sm mt-1">رقم الحجز: #{r.id}</p>
        </div>
        <div className="p-6 space-y-6">
          {p && <div className="bg-gray-50 p-4 rounded-xl">
            <h3 className="font-bold text-gray-900 mb-3 flex items-center gap-2"><Home className="w-5 h-5 text-amber-500"/> معلومات العقار</h3>
            <p><span className="text-gray-500">العنوان:</span> {propAddr(p, r)||'—'}</p>
            {(propBeds(p, r)||propBaths(p, r)) && <div className="flex gap-3 mt-2">
              {propBeds(p, r)>0&&<span className="text-sm bg-white px-2 py-1 rounded-lg">{propBeds(p, r)} غرف</span>}
              {propBaths(p, r)>0&&<span className="text-sm bg-white px-2 py-1 rounded-lg">{propBaths(p, r)} حمامات</span>}
            </div>}
          </div>}
          <div className="bg-gray-50 p-4 rounded-xl">
            <h3 className="font-bold text-gray-900 mb-3 flex items-center gap-2"><Calendar className="w-5 h-5 text-amber-500"/> تفاصيل الحجز</h3>
            <div className="grid grid-cols-2 gap-4">
              <div><p className="text-gray-500">تاريخ البداية</p><p className="font-medium">{new Date(r.startDate).toLocaleDateString('ar')}</p></div>
              <div><p className="text-gray-500">تاريخ النهاية</p><p className="font-medium">{new Date(r.endDate).toLocaleDateString('ar')}</p></div>
              <div><p className="text-gray-500">الحالة</p><StatusBadge code={r.status}/></div>
              <div><p className="text-gray-500">تاريخ الإنشاء</p><p className="font-medium">{new Date(r.createdAt).toLocaleDateString('ar')}</p></div>
            </div>
          </div>
          <div className="bg-amber-50 p-4 rounded-xl">
            <h3 className="font-bold text-amber-700 mb-3 flex items-center gap-2"><DollarSign className="w-5 h-5"/> المعلومات المالية</h3>
            <div className="flex justify-between font-bold"><span className="text-gray-900">الإجمالي</span><span className="text-amber-600 text-lg">{r.totalPrice?.toLocaleString()??'—'}</span></div>
          </div>
          {isOwnerConfirmed && hasTimeWindow && <div className="bg-blue-50 p-4 rounded-xl">
            <div className="flex items-center justify-between mb-2">
              <span className="text-blue-800 font-medium flex items-center gap-2"><Timer className="w-5 h-5"/> متبقي للدفع:</span>
              <CountdownTimer deadline={deadline} />
            </div>
            <div className="text-xs text-blue-600 mb-3">مدة الدفع: {formatWindowDuration(p.allowedPaymentPeriod)}</div>
            {!isExpired && <button onClick={() => { onPay(r); onClose(); }} disabled={isPaying}
              className={`w-full py-2 rounded-xl font-medium transition-colors flex items-center justify-center gap-2 ${isPaying ? 'bg-gray-300 text-gray-500 cursor-not-allowed' : 'bg-amber-500 text-white hover:bg-amber-600'}`}>
              {isPaying ? <Loader2 className="w-5 h-5 animate-spin"/> : <CreditCard className="w-5 h-5"/>} {isPaying ? 'جاري الدفع...' : 'ادفع الآن'}
            </button>}
          </div>}
        </div>
      </motion.div>
    </motion.div>
  );
}

export default function UserReservationsPage() {
  const router = useRouter();
  const [reservations, setReservations] = useState([]);
  const [filtered, setFiltered] = useState([]);
  const [loading, setLoading] = useState(true);
  const [selected, setSelected] = useState(null);
  const [filterStatus, setFilterStatus] = useState('all');
  const [searchTerm, setSearchTerm] = useState('');
  const [payingId, setPayingId] = useState(null);

  useEffect(() => { if (!AuthService.getUser()) { router.push('/login'); return; } loadReservations(); }, [router]);

  const loadReservations = useCallback(async () => {
    try {
      const [data, rentProps] = await Promise.all([
        getUserReservations(),
        getRentProperties().catch(() => []),
      ]);
      const list = Array.isArray(data) ? data : [];
      const propsList = Array.isArray(rentProps) ? rentProps : [];
      const propMap = {};
      propsList.forEach(rp => {
        const info = rp?.propertyInformation ?? {};
        if (rp?.allowedPaymentPeriod) info.allowedPaymentPeriod = rp.allowedPaymentPeriod;
        propMap[rp.propertyInformationId] = info;
        propMap[rp.propertyInformation?.id] = info;
      });
      const enriched = list.map(r => {
        if (r.propertyId && propMap[r.propertyId]) r._prop = propMap[r.propertyId];
        return r;
      });
      setReservations(enriched);
      setFiltered(enriched);
    } catch (err) {
      console.error(err);
      toast.error('فشل تحميل الحجوزات');
      setReservations([]);
      setFiltered([]);
    }
    setLoading(false);
  }, []);

  useEffect(() => {
    let r = reservations;
    if (filterStatus !== 'all') r = r.filter(x => STATUS_MAP[x.status] === filterStatus);
    if (searchTerm) { const q = searchTerm.toLowerCase(); r = r.filter(x => propAddr(x._prop, x).toLowerCase().includes(q) || String(x.id).includes(q)); }
    setFiltered(r);
  }, [reservations, filterStatus, searchTerm]);

  const allStatuses = [...new Set(reservations.map(r => STATUS_MAP[r.status]))];
  const counts = { all: reservations.length, ...Object.fromEntries(allStatuses.map(s => [s, reservations.filter(r => STATUS_MAP[r.status] === s).length])) };

  const handlePay = async (r) => {
    setPayingId(r.id);
    try {
      await payDeposit({
        reservationId: r.id,
        paymentTypeId: 1,
        transactionType: 1,
        comment: null,
      });
      toast.success('تم دفع السلفة بنجاح!');
      loadReservations();
    } catch (err) {
      toast.error(err?.message || 'فشل عملية الدفع');
    } finally {
      setPayingId(null);
    }
  };

  if (loading) return <div className="min-h-screen bg-gray-50 flex items-center justify-center"><Loader2 className="w-12 h-12 text-amber-500 animate-spin"/></div>;

  return (
    <div className="min-h-screen bg-gray-50 py-8" dir="rtl">
      <Toaster position="top-center" reverseOrder={false} />
      <DetailsModal r={selected} isOpen={!!selected} onClose={() => setSelected(null)} onPay={handlePay} payingId={payingId} />
      <div className="container mx-auto px-4">
        <motion.div initial={{opacity:0,y:-20}} animate={{opacity:1,y:0}} className="mb-8">
          <button onClick={() => router.back()} className="flex items-center gap-2 text-gray-600 hover:text-amber-600 mb-4"><ArrowLeft className="w-5 h-5"/> الرجوع</button>
          <h1 className="text-3xl font-bold text-gray-900 mb-2">حجوزاتي</h1>
          <p className="text-gray-600">لديك {reservations.length} حجز</p>
        </motion.div>
        <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-8">
          {Object.entries(counts).map(([s, c]) => (
            <motion.div key={s} initial={{opacity:0,y:20}} animate={{opacity:1,y:0}}
              className={`bg-white rounded-xl shadow-sm p-4 text-center border cursor-pointer hover:shadow-md transition-all ${filterStatus===s?'border-amber-500 bg-amber-50':'border-gray-200'}`}
              onClick={() => setFilterStatus(s)}>
              <div className="text-2xl font-bold text-amber-600">{c}</div>
              <div className="text-sm text-gray-600">{s==='all'?'الكل':(STATUS_UI[s]?.label||s)}</div>
            </motion.div>
          ))}
        </div>
        <div className="mb-6 relative">
          <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-gray-400"/>
          <input type="text" placeholder="ابحث بعنوان العقار أو رقم الحجز..." value={searchTerm} onChange={e=>setSearchTerm(e.target.value)}
            className="w-full pl-10 pr-4 py-3 border border-gray-300 rounded-xl focus:outline-none focus:ring-2 focus:ring-amber-500"/>
        </div>
        {filtered.length === 0 ? (
          <div className="bg-white rounded-2xl p-12 text-center border-2 border-dashed border-gray-300">
            <Calendar className="w-12 h-12 text-amber-600 mx-auto mb-4"/>
            <h3 className="text-xl font-bold text-gray-900 mb-2">لا توجد حجوزات</h3>
            <p className="text-gray-600">لم تقم بأي حجز حتى الآن</p>
          </div>
        ) : (
          <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
            {filtered.map(r => <ReservationCard key={r.id} r={r} onViewDetails={setSelected} onPay={handlePay} payingId={payingId} />)}
          </div>
        )}
      </div>
    </div>
  );
}