'use client';

import { useState, useEffect } from 'react';
import { motion } from 'framer-motion';
import { 
  DollarSign, 
  Calendar, 
  User, 
  Home,
  Download,
  Filter,
  Search,
  TrendingUp,
  TrendingDown,
  Wallet,
  Shield
} from 'lucide-react';
import { formatCurrency } from '@/app/utils/calculations';

export default function LedgerBook({ userType = 'admin' }) {
  const [transactions, setTransactions] = useState([]);
  const [filteredTransactions, setFilteredTransactions] = useState([]);
  const [dateRange, setDateRange] = useState({ start: '', end: '' });
  const [searchTerm, setSearchTerm] = useState('');
  const [summary, setSummary] = useState({
    totalRevenue: 0,
    pendingPayments: 0,
    securityDeposits: 0,
    commissionEarned: 0
  });

  useEffect(() => {
    loadTransactions();
  }, []);

  useEffect(() => {
    filterTransactions();
    calculateSummary();
  }, [transactions, dateRange, searchTerm]);

  const loadTransactions = async () => {
    const mockTransactions = [
      {
        id: 'T001',
        date: '2024-02-20',
        type: 'rent_payment',
        description: 'دفعة إيجار - فيلا في دمشق',
        amount: 500000,
        commission: 25000,
        fromUser: 'أحمد محمد',
        toUser: 'مالك العقار',
        propertyId: 1,
        propertyName: 'luxuryVillaDamascus',
        status: 'completed',
        paymentMethod: 'cash'
      },
      {
        id: 'T002',
        date: '2024-02-19',
        type: 'security_deposit',
        description: 'سلفة ضمان - شقة في حلب',
        amount: 250000,
        commission: 0,
        fromUser: 'سارة أحمد',
        toUser: 'مالك العقار',
        propertyId: 2,
        propertyName: 'modernApartmentAleppo',
        status: 'pending_refund',
        paymentMethod: 'cash'
      },
      {
        id: 'T003',
        date: '2024-02-18',
        type: 'commission',
        description: 'عمولة منصة - فيلا في درعا',
        amount: 30000,
        commission: 30000,
        fromUser: 'محمد الحلبي',
        toUser: 'المنصة',
        propertyId: 5,
        propertyName: 'villaDaraa',
        status: 'completed',
        paymentMethod: 'cash'
      }
    ];
    setTransactions(mockTransactions);
  };

  const filterTransactions = () => {
    let filtered = [...transactions];

    if (dateRange.start && dateRange.end) {
      filtered = filtered.filter(t => 
        t.date >= dateRange.start && t.date <= dateRange.end
      );
    }

    if (searchTerm) {
      filtered = filtered.filter(t =>
        t.description.includes(searchTerm) ||
        t.fromUser.includes(searchTerm) ||
        t.toUser.includes(searchTerm)
      );
    }

    setFilteredTransactions(filtered);
  };

  const calculateSummary = () => {
    const summary = filteredTransactions.reduce((acc, t) => {
      if (t.type === 'rent_payment' || t.type === 'commission') {
        acc.totalRevenue += t.amount;
      }
      if (t.type === 'security_deposit' && t.status === 'pending_refund') {
        acc.securityDeposits += t.amount;
      }
      if (t.commission) {
        acc.commissionEarned += t.commission;
      }
      if (t.status === 'pending') {
        acc.pendingPayments += t.amount;
      }
      return acc;
    }, {
      totalRevenue: 0,
      pendingPayments: 0,
      securityDeposits: 0,
      commissionEarned: 0
    });

    setSummary(summary);
  };

  const getTransactionIcon = (type) => {
    switch(type) {
      case 'rent_payment':
        return <Home className="w-4 h-4 text-blue-600" />;
      case 'security_deposit':
        return <Shield className="w-4 h-4 text-green-600" />;
      case 'commission':
        return <TrendingUp className="w-4 h-4 text-amber-600" />;
      default:
        return <DollarSign className="w-4 h-4" />;
    }
  };

  const exportToExcel = () => {
    const csvContent = [
      ['التاريخ', 'الوصف', 'من', 'إلى', 'المبلغ', 'العمولة', 'الحالة'],
      ...filteredTransactions.map(t => [
        t.date,
        t.description,
        t.fromUser,
        t.toUser,
        t.amount,
        t.commission,
        t.status
      ])
    ].map(row => row.join(',')).join('\n');

    const blob = new Blob([csvContent], { type: 'text/csv' });
    const url = window.URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = `ledger_${new Date().toISOString()}.csv`;
    a.click();
  };

  return (
    <div className="space-y-6">
      <div className="grid grid-cols-1 md:grid-cols-4 gap-4">
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          className="bg-gradient-to-br from-blue-600 to-blue-700 text-white rounded-xl p-5"
        >
          <div className="flex items-center justify-between mb-3">
            <Wallet className="w-8 h-8 opacity-80" />
            <span className="text-sm opacity-90">إجمالي الإيرادات</span>
          </div>
          <div className="text-2xl font-bold">{formatCurrency(summary.totalRevenue)}</div>
        </motion.div>

        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.1 }}
          className="bg-gradient-to-br from-amber-600 to-amber-700 text-white rounded-xl p-5"
        >
          <div className="flex items-center justify-between mb-3">
            <TrendingUp className="w-8 h-8 opacity-80" />
            <span className="text-sm opacity-90">أرباح المنصة</span>
          </div>
          <div className="text-2xl font-bold">{formatCurrency(summary.commissionEarned)}</div>
        </motion.div>

        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.2 }}
          className="bg-gradient-to-br from-green-600 to-green-700 text-white rounded-xl p-5"
        >
          <div className="flex items-center justify-between mb-3">
            <Shield className="w-8 h-8 opacity-80" />
            <span className="text-sm opacity-90">سلف الضمان</span>
          </div>
          <div className="text-2xl font-bold">{formatCurrency(summary.securityDeposits)}</div>
        </motion.div>

        <motion.div
          initial={{ opacity: 0, y: 20 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ delay: 0.3 }}
          className="bg-gradient-to-br from-red-600 to-red-700 text-white rounded-xl p-5"
        >
          <div className="flex items-center justify-between mb-3">
            <TrendingDown className="w-8 h-8 opacity-80" />
            <span className="text-sm opacity-90">المدفوعات المعلقة</span>
          </div>
          <div className="text-2xl font-bold">{formatCurrency(summary.pendingPayments)}</div>
        </motion.div>
      </div>

      <div className="bg-white rounded-xl p-5 shadow-sm border">
        <div className="flex flex-col md:flex-row gap-4">
          <div className="flex-1 relative">
            <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 w-4 h-4 text-gray-400" />
            <input
              type="text"
              placeholder="بحث في المعاملات..."
              value={searchTerm}
              onChange={(e) => setSearchTerm(e.target.value)}
              className="w-full pl-10 pr-4 py-2 border rounded-lg focus:ring-2 focus:ring-blue-500"
            />
          </div>
          
          <div className="flex gap-2">
            <input
              type="date"
              value={dateRange.start}
              onChange={(e) => setDateRange({...dateRange, start: e.target.value})}
              className="px-3 py-2 border rounded-lg"
            />
            <span className="text-gray-500 self-center">إلى</span>
            <input
              type="date"
              value={dateRange.end}
              onChange={(e) => setDateRange({...dateRange, end: e.target.value})}
              className="px-3 py-2 border rounded-lg"
            />
          </div>

          <button
            onClick={exportToExcel}
            className="px-4 py-2 bg-green-600 text-white rounded-lg flex items-center gap-2 hover:bg-green-700"
          >
            <Download className="w-4 h-4" />
            تصدير
          </button>
        </div>
      </div>

      <div className="bg-white rounded-xl shadow-sm border overflow-hidden">
        <div className="overflow-x-auto">
          <table className="w-full">
            <thead className="bg-gray-50 border-b">
              <tr>
                <th className="px-6 py-4 text-right text-sm font-semibold text-gray-900">التاريخ</th>
                <th className="px-6 py-4 text-right text-sm font-semibold text-gray-900">الوصف</th>
                <th className="px-6 py-4 text-right text-sm font-semibold text-gray-900">من</th>
                <th className="px-6 py-4 text-right text-sm font-semibold text-gray-900">إلى</th>
                <th className="px-6 py-4 text-right text-sm font-semibold text-gray-900">المبلغ</th>
                <th className="px-6 py-4 text-right text-sm font-semibold text-gray-900">العمولة</th>
                <th className="px-6 py-4 text-right text-sm font-semibold text-gray-900">الحالة</th>
              </tr>
            </thead>
            <tbody className="divide-y">
              {filteredTransactions.map((transaction, index) => (
                <motion.tr
                  key={transaction.id}
                  initial={{ opacity: 0, x: -20 }}
                  animate={{ opacity: 1, x: 0 }}
                  transition={{ delay: index * 0.05 }}
                  className="hover:bg-gray-50"
                >
                  <td className="px-6 py-4 text-sm">
                    <div className="flex items-center gap-2">
                      <Calendar className="w-4 h-4 text-gray-400" />
                      {transaction.date}
                    </div>
                  </td>
                  <td className="px-6 py-4">
                    <div className="flex items-center gap-2">
                      {getTransactionIcon(transaction.type)}
                      <span className="text-sm font-medium">{transaction.description}</span>
                    </div>
                  </td>
                  <td className="px-6 py-4">
                    <div className="flex items-center gap-2">
                      <User className="w-4 h-4 text-gray-400" />
                      <span className="text-sm">{transaction.fromUser}</span>
                    </div>
                  </td>
                  <td className="px-6 py-4">
                    <div className="flex items-center gap-2">
                      <User className="w-4 h-4 text-gray-400" />
                      <span className="text-sm">{transaction.toUser}</span>
                    </div>
                  </td>
                  <td className="px-6 py-4 text-sm font-bold">
                    {formatCurrency(transaction.amount)}
                  </td>
                  <td className="px-6 py-4 text-sm text-amber-600">
                    {transaction.commission ? formatCurrency(transaction.commission) : '-'}
                  </td>
                  <td className="px-6 py-4">
                    <span className={`px-2 py-1 rounded-full text-xs ${
                      transaction.status === 'completed' ? 'bg-green-100 text-green-800' :
                      transaction.status === 'pending' ? 'bg-yellow-100 text-yellow-800' :
                      'bg-blue-100 text-blue-800'
                    }`}>
                      {transaction.status === 'completed' ? 'مكتمل' :
                       transaction.status === 'pending' ? 'معلق' : 'بإنتظار الرد'}
                    </span>
                  </td>
                </motion.tr>
              ))}
            </tbody>
          </table>
        </div>

        {filteredTransactions.length === 0 && (
          <div className="text-center py-12">
            <Wallet className="w-12 h-12 text-gray-300 mx-auto mb-3" />
            <p className="text-gray-500">لا توجد معاملات في هذه الفترة</p>
          </div>
        )}
      </div>

      {userType === 'owner' && (
        <div className="bg-blue-50 rounded-xl p-5">
          <h3 className="font-bold mb-4 flex items-center gap-2">
            <User className="w-5 h-5" />
            أرصدة المستأجرين
          </h3>
          <div className="space-y-3">
          </div>
        </div>
      )}
    </div>
  );
}