'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,
  User,
  RefreshCw,
  Mail,
  Phone
} from 'lucide-react';
import toast, { Toaster } from 'react-hot-toast';
import AuthService from '../../services/AuthService';

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

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

function StatusBadge({ status }) {
  const config = statusConfig[status] || { label: status, color: 'bg-gray-100 text-gray-700', icon: Clock };
  const Icon = config.icon;
  return (
    <span className={`inline-flex items-center gap-1 px-2 py-1 rounded-lg text-xs font-medium ${config.color}`}>
      <Icon className="w-3 h-3" />
      {config.label}
    </span>
  );
}

function OwnerReservationCard({ reservation, onViewDetails, onConfirm, onReject }) {
  const property = reservation.property || reservation.propertyInformation;
  const user = reservation.user;
  const isPending = reservation.status === 'pending';

  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">
        <div className="flex justify-between items-start mb-4">
          <div>
            <StatusBadge status={reservation.status} />
            {property && (
              <div className="flex items-center gap-1 text-gray-500 text-sm mt-2">
                <MapPin className="w-4 h-4" />
                {property.address || 'عقار'}
              </div>
            )}
          </div>
          <div className="text-left">
            <div className="text-lg font-bold text-amber-600">
              {reservation.totalPrice?.toLocaleString() || '—'}
            </div>
            <div className="text-xs text-gray-500">السعر الإجمالي</div>
          </div>
        </div>

        {user && (
          <div className="bg-gray-50 rounded-xl p-3 mb-4">
            <div className="flex items-center gap-2">
              <div className="w-10 h-10 bg-amber-100 rounded-full flex items-center justify-center">
                <User className="w-5 h-5 text-amber-600" />
              </div>
              <div>
                <p className="font-medium text-gray-900">{user.name || user.email || 'مستخدم'}</p>
                <div className="flex items-center gap-2 text-xs text-gray-500">
                  {user.phoneNumber && <><Phone className="w-3 h-3" />{user.phoneNumber}</>}
                  {user.email && <><Mail className="w-3 h-3 mr-1" />{user.email}</>}
                </div>
              </div>
            </div>
          </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(reservation.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(reservation.endDate).toLocaleDateString('ar')}
            </div>
          </div>
        </div>

        <div className={`flex gap-3 pt-3 border-t border-gray-100 ${!isPending ? '' : ''}`}>
          <button
            onClick={() => onViewDetails(reservation)}
            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>

          {isPending && (
            <>
              <button
                onClick={() => onConfirm(reservation)}
                className="flex-1 bg-green-500 text-white py-2 rounded-xl text-sm font-medium hover:bg-green-600 transition-colors flex items-center justify-center gap-2"
              >
                <CheckCircle className="w-4 h-4" />
                قبول
              </button>
              <button
                onClick={() => onReject(reservation)}
                className="flex-1 bg-red-500 text-white py-2 rounded-xl text-sm font-medium hover:bg-red-600 transition-colors flex items-center justify-center gap-2"
              >
                <XCircle className="w-4 h-4" />
                رفض
              </button>
            </>
          )}
        </div>
      </div>
    </motion.div>
  );
}

function DetailsModal({ reservation, isOpen, onClose }) {
  if (!isOpen || !reservation) return null;
  const property = reservation.property || reservation.propertyInformation;
  const user = reservation.user;

  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">طلب حجز #{reservation.id}</h2>
            <button onClick={onClose} className="p-1 hover:bg-white/20 rounded-full">
              <XCircle className="w-6 h-6" />
            </button>
          </div>
        </div>

        <div className="p-6 space-y-6">
          {user && (
            <div className="bg-gray-50 p-4 rounded-xl">
              <h3 className="font-bold text-gray-900 mb-3 flex items-center gap-2">
                <User className="w-5 h-5 text-amber-500" /> معلومات المستأجر
              </h3>
              <p><span className="text-gray-500">الاسم:</span> {user.name || '—'}</p>
              <p><span className="text-gray-500">البريد:</span> {user.email || '—'}</p>
              {user.phoneNumber && <p><span className="text-gray-500">الهاتف:</span> {user.phoneNumber}</p>}
            </div>
          )}

          {property && (
            <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> {property.address || '—'}</p>
              {property.numberOfBedRooms && (
                <div className="flex gap-3 mt-2">
                  <span className="text-sm bg-white px-2 py-1 rounded-lg">{property.numberOfBedRooms} غرف</span>
                  <span className="text-sm bg-white px-2 py-1 rounded-lg">{property.numberOfBathRooms} 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(reservation.startDate).toLocaleDateString('ar')}</p>
              </div>
              <div>
                <p className="text-gray-500">تاريخ النهاية</p>
                <p className="font-medium">{new Date(reservation.endDate).toLocaleDateString('ar')}</p>
              </div>
              <div>
                <p className="text-gray-500">الحالة</p>
                <StatusBadge status={reservation.status} />
              </div>
              <div>
                <p className="text-gray-500">تاريخ الإنشاء</p>
                <p className="font-medium">{new Date(reservation.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">{reservation.totalPrice?.toLocaleString() || '—'}</span>
            </div>
          </div>
        </div>
      </motion.div>
    </motion.div>
  );
}

export default function OwnerReservationRequestsPage() {
  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('');

  useEffect(() => {
    const user = AuthService.getUser();
    if (!user || !AuthService.isOwner()) {
      router.push('/auth/choose-role');
      return;
    }
    loadReservations();
  }, [router]);

  const loadReservations = async () => {
    try {
      const token = AuthService.getToken();
      const res = await fetch(`${API_BASE}/Reservations/GetOwnerResevationRequests`, {
        headers: { Authorization: `Bearer ${token}` },
      });

      if (!res.ok) throw new Error(`HTTP ${res.status}`);
      const json = await res.json();

      const list = json.data || json || [];
      setReservations(Array.isArray(list) ? list : []);
      setFiltered(Array.isArray(list) ? list : []);
    } catch (err) {
      console.error('Failed to load owner reservations:', err);
      toast.error('فشل تحميل طلبات الحجز');
    }
    setLoading(false);
  };

  useEffect(() => {
    let result = reservations;
    if (filterStatus !== 'all') result = result.filter(r => r.status === filterStatus);
    if (searchTerm) {
      const q = searchTerm.toLowerCase();
      result = result.filter(r => {
        const addr = (r.property?.address || '').toLowerCase();
        const userName = ((r.user?.name) || (r.user?.email) || '').toLowerCase();
        const sid = String(r.id).toLowerCase();
        return addr.includes(q) || userName.includes(q) || sid.includes(q);
      });
    }
    setFiltered(result);
  }, [reservations, filterStatus, searchTerm]);

  const handleConfirm = async (reservation) => {
    try {
      const token = AuthService.getToken();
      const id = typeof reservation.id === 'number' ? reservation.id : parseInt(reservation.id);
      const res = await fetch(`${API_BASE}/Reservations/owner-confirm/${id}`, {
        method: 'PUT',
        headers: { Authorization: `Bearer ${token}` },
      });

      if (!res.ok) throw new Error(`HTTP ${res.status}`);

      toast.success('تم قبول الحجز بنجاح');
      await loadReservations();
    } catch (err) {
      console.error('Failed to confirm:', err);
      toast.error('فشل قبول الحجز');
    }
  };

  const handleReject = async (reservation) => {
    if (!confirm('هل أنت متأكد من رفض هذا الحجز؟')) return;
    try {
      const token = AuthService.getToken();
      const id = typeof reservation.id === 'number' ? reservation.id : parseInt(reservation.id);
      const res = await fetch(`${API_BASE}/Reservations/reject/${id}`, {
        method: 'PUT',
        headers: { Authorization: `Bearer ${token}` },
      });

      if (!res.ok) throw new Error(`HTTP ${res.status}`);

      toast.success('تم رفض الحجز');
      await loadReservations();
    } catch (err) {
      console.error('Failed to reject:', err);
      toast.error('فشل رفض الحجز');
    }
  };

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

  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 reservation={selected} isOpen={!!selected} onClose={() => setSelected(null)} />

      <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>
          <div className="flex items-center justify-between mb-2">
            <div>
              <h1 className="text-3xl font-bold text-gray-900">طلبات الحجز</h1>
              <p className="text-gray-600">لديك {reservations.length} طلب</p>
            </div>
            <button
              onClick={loadReservations}
              className="p-2 bg-white shadow rounded-xl hover:shadow-md transition-all"
            >
              <RefreshCw className="w-5 h-5 text-gray-600" />
            </button>
          </div>
        </motion.div>

        <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-8">
          {Object.entries(statusCounts).map(([status, count]) => (
            <motion.div
              key={status}
              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 === status ? 'border-amber-500 bg-amber-50' : 'border-gray-200'
              }`}
              onClick={() => setFilterStatus(status)}
            >
              <div className="text-2xl font-bold text-amber-600">{count}</div>
              <div className="text-sm text-gray-600">{status === 'all' ? 'الكل' : (statusConfig[status]?.label || status)}</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 المستأجر 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 طلبات</h3>
            <p className="text-gray-600">لم يتم استلام أي طلبات حجز حتى الآن</p>
          </div>
        ) : (
          <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
            {filtered.map((r) => (
              <OwnerReservationCard
                key={r.id}
                reservation={r}
                onViewDetails={setSelected}
                onConfirm={handleConfirm}
                onReject={handleReject}
              />
            ))}
          </div>
        )}
      </div>
    </div>
  );
}