import React, { useState } from 'react';
import { usePaymentMethodsReport } from '../core/_hooks';
import { PaymentMethodsFilters } from '../core/_models';
import { Button } from '@/components/ui/Button';
import { Input } from '@/components/ui/Input';
import { Table } from '@/components/ui/Table';
import { TableColumn } from '@/types';
import { JalaliDateTimePicker } from '@/components/ui/JalaliDateTimePicker';
import { PageContainer, PageTitle } from '@/components/ui/Typography';
import { Pagination } from '@/components/ui/Pagination';
import { Filter, TrendingUp, Users, DollarSign, CreditCard, CheckCircle, XCircle, X } from 'lucide-react';
import { formatWithThousands, persianToEnglish } from '@/utils/numberUtils';
import { PieChart } from '@/components/charts/PieChart';

const formatCurrency = (amount: number) => {
  return formatWithThousands(amount) + ' تومان';
};

const formatDate = (dateString: string) => {
  if (!dateString) return '-';
  return new Date(dateString).toLocaleDateString('fa-IR', {
    year: 'numeric',
    month: 'long',
    day: 'numeric',
    hour: '2-digit',
    minute: '2-digit',
  });
};

const formatPercentage = (value: number) => {
  return formatWithThousands(value.toFixed(2)) + '%';
};

const getPaymentTypeLabel = (type: string): string => {
  const labels: Record<string, string> = {
    'bank-topup': 'افزایش موجودی کیف پول',
    'card-to-card': 'پرداخت به روش کارت به کارت',
    'debit-rial-wallet': 'پرداخت از کیف ریالی',
    'debit-gold18k-wallet': 'پرداخت از کیف طلا',
  };
  return labels[type] || type;
};

const PaymentMethodsReportSkeleton = () => (
  <>
    {/* Summary Cards Skeleton */}
    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4 mb-6">
      {[...Array(4)].map((_, i) => (
        <div key={i} className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-4 animate-pulse">
          <div className="flex items-center gap-3">
            <div className="p-2 bg-gray-200 dark:bg-gray-700 rounded-lg w-12 h-12"></div>
            <div className="flex-1">
              <div className="h-4 bg-gray-200 dark:bg-gray-700 rounded w-20 mb-2"></div>
              <div className="h-6 bg-gray-200 dark:bg-gray-700 rounded w-16"></div>
            </div>
          </div>
        </div>
      ))}
    </div>

    {/* Pie Chart and Total Amount Skeleton */}
    <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 mb-6">
      <div className="lg:col-span-2 bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-6 animate-pulse">
        <div className="h-6 bg-gray-200 dark:bg-gray-700 rounded w-48 mb-6"></div>
        <div className="h-64 bg-gray-200 dark:bg-gray-700 rounded"></div>
      </div>
      <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-6 animate-pulse">
        <div className="h-16 w-16 bg-gray-200 dark:bg-gray-700 rounded-full mx-auto mb-4"></div>
        <div className="h-4 bg-gray-200 dark:bg-gray-700 rounded w-24 mx-auto mb-2"></div>
        <div className="h-8 bg-gray-200 dark:bg-gray-700 rounded w-40 mx-auto"></div>
      </div>
    </div>

    {/* Payment Type Cards Skeleton */}
    <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-6 mb-6 animate-pulse">
      <div className="h-6 bg-gray-200 dark:bg-gray-700 rounded w-48 mb-6"></div>
      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-5 gap-4">
        {[...Array(5)].map((_, i) => (
          <div key={i} className="border-2 border-gray-200 dark:border-gray-700 rounded-lg p-5 bg-gray-50 dark:bg-gray-700/50">
            <div className="h-5 bg-gray-200 dark:bg-gray-600 rounded w-32 mb-4"></div>
            <div className="space-y-2.5">
              {[...Array(5)].map((_, j) => (
                <div key={j} className="flex justify-between">
                  <div className="h-4 bg-gray-200 dark:bg-gray-600 rounded w-16"></div>
                  <div className="h-4 bg-gray-200 dark:bg-gray-600 rounded w-12"></div>
                </div>
              ))}
            </div>
          </div>
        ))}
      </div>
    </div>

    {/* Table Skeleton */}
    <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg overflow-hidden">
      <div className="overflow-x-auto">
        <table className="min-w-full divide-y divide-gray-200 dark:divide-gray-700">
          <thead className="bg-gray-50 dark:bg-gray-700">
            <tr>
              {[...Array(10)].map((_, i) => (
                <th key={i} className="px-6 py-3 text-right text-xs font-medium text-gray-500 dark:text-gray-300 uppercase tracking-wider">
                  <div className="h-4 bg-gray-200 dark:bg-gray-600 rounded w-20"></div>
                </th>
              ))}
            </tr>
          </thead>
          <tbody className="bg-white dark:bg-gray-800 divide-y divide-gray-200 dark:divide-gray-700">
            {[...Array(5)].map((_, i) => (
              <tr key={i} className="animate-pulse">
                {[...Array(10)].map((_, j) => (
                  <td key={j} className="px-6 py-4 whitespace-nowrap">
                    <div className="h-4 bg-gray-200 dark:bg-gray-600 rounded"></div>
                  </td>
                ))}
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </div>
  </>
);

const PaymentMethodsReportPage = () => {
  const [filters, setFilters] = useState<PaymentMethodsFilters>({
    limit: 50,
    offset: 0,
    group_by_user: false,
  });

  const { data, isLoading, error } = usePaymentMethodsReport(filters);

  const handleFilterChange = (key: keyof PaymentMethodsFilters, value: any) => {
    setFilters(prev => ({
      ...prev,
      [key]: value,
      offset: 0,
    }));
  };

  const handleDateRangeChange = (from: string | undefined, to: string | undefined) => {
    setFilters(prev => ({
      ...prev,
      date_range: {
        from,
        to,
      },
      offset: 0,
    }));
  };

  const handleNumericFilterChange = (key: 'user_id', raw: string) => {
    const converted = persianToEnglish(raw).replace(/[^\d]/g, '');
    const numeric = converted ? Number(converted) : undefined;
    handleFilterChange(key, numeric);
  };

  const handlePageChange = (page: number) => {
    setFilters(prev => ({
      ...prev,
      offset: (page - 1) * prev.limit,
    }));
  };

  const handleClearFilters = () => {
    setFilters({
      limit: 50,
      offset: 0,
      group_by_user: false,
    });
  };

  const columns: TableColumn[] = [
    {
      key: 'customer_name',
      label: 'نام مشتری',
      align: 'right',
    },
    {
      key: 'customer_phone',
      label: 'شماره تماس',
      align: 'right',
    },
    {
      key: 'payment_type',
      label: 'نوع پرداخت',
      align: 'right',
    },
    {
      key: 'successful_count',
      label: 'موفق',
      align: 'right',
    },
    {
      key: 'failed_count',
      label: 'ناموفق',
      align: 'right',
    },
    {
      key: 'total_attempts',
      label: 'کل تلاش‌ها',
      align: 'right',
    },
    {
      key: 'total_amount',
      label: 'مجموع مبلغ',
      align: 'right',
    },
    {
      key: 'success_rate',
      label: 'نرخ موفقیت',
      align: 'right',
    },
    {
      key: 'first_used_at',
      label: 'اولین استفاده',
      align: 'right',
    },
    {
      key: 'last_used_at',
      label: 'آخرین استفاده',
      align: 'right',
    },
  ];

  const tableData = (data?.payment_methods || []).map(method => ({
    customer_name: method.customer_name || '-',
    customer_phone: method.customer_phone || '-',
    payment_type: getPaymentTypeLabel(method.payment_type),
    successful_count: formatWithThousands(method.successful_count),
    failed_count: formatWithThousands(method.failed_count),
    total_attempts: formatWithThousands(method.total_attempts),
    total_amount: formatCurrency(method.total_amount),
    success_rate: formatPercentage(method.success_rate),
    first_used_at: formatDate(method.first_used_at),
    last_used_at: formatDate(method.last_used_at),
  })) || [];

  const currentPage = Math.floor(filters.offset / filters.limit) + 1;
  const totalPages = data ? Math.ceil(data.total / filters.limit) : 1;

  return (
    <PageContainer>
      <PageTitle>گزارش روش‌های پرداخت</PageTitle>

      {/* Filters */}
      <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-4 mb-6">
        <div className="flex items-center justify-between mb-4">
          <div className="flex items-center gap-2">
            <Filter className="h-5 w-5 text-gray-500" />
            <h3 className="text-lg font-semibold text-gray-900 dark:text-gray-100">فیلترها</h3>
          </div>
          <Button
            variant="secondary"
            size="sm"
            onClick={handleClearFilters}
            className="flex items-center gap-2"
          >
            <X className="h-4 w-4" />
            پاک کردن فیلترها
          </Button>
        </div>

        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
          <div>
            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
              شناسه کاربر
            </label>
            <Input
              value={filters.user_id?.toString() || ''}
              onChange={(e) => handleNumericFilterChange('user_id', e.target.value)}
              placeholder="مثلاً 456"
              numeric
            />
          </div>

          <div>
            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
              نوع پرداخت
            </label>
            <select
              value={filters.payment_type || ''}
              onChange={(e) => handleFilterChange('payment_type', e.target.value || undefined)}
              className="w-full px-3 py-3 text-base border border-gray-300 dark:border-gray-600 rounded-lg focus:outline-none focus:ring-2 focus:ring-primary-500 focus:border-primary-500 dark:bg-gray-700 dark:text-gray-100 transition-all duration-200"
            >
              <option value="">همه</option>
              <option value="bank-topup">افزایش موجودی کیف پول</option>
              <option value="card-to-card">پرداخت به روش کارت به کارت</option>
              <option value="debit-rial-wallet">پرداخت از کیف ریالی</option>
              <option value="debit-gold18k-wallet">پرداخت از کیف طلا</option>
            </select>
          </div>

          <div>
            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
              وضعیت
            </label>
            <select
              value={filters.status || ''}
              onChange={(e) => handleFilterChange('status', e.target.value || undefined)}
              className="w-full px-3 py-3 text-base border border-gray-300 dark:border-gray-600 rounded-lg focus:outline-none focus:ring-2 focus:ring-primary-500 focus:border-primary-500 dark:bg-gray-700 dark:text-gray-100 transition-all duration-200"
            >
              <option value="">همه</option>
              <option value="pending">در انتظار</option>
              <option value="paid">پرداخت شده</option>
              <option value="failed">ناموفق</option>
              <option value="refunded">مرجوع شده</option>
              <option value="cancelled">لغو شده</option>
            </select>
          </div>

          <div>
            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
              تاریخ شروع
            </label>
            <JalaliDateTimePicker
              value={filters.date_range?.from}
              onChange={(value) => handleDateRangeChange(value, filters.date_range?.to)}
              placeholder="انتخاب تاریخ شروع"
            />
          </div>

          <div>
            <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
              تاریخ پایان
            </label>
            <JalaliDateTimePicker
              value={filters.date_range?.to}
              onChange={(value) => handleDateRangeChange(filters.date_range?.from, value)}
              placeholder="انتخاب تاریخ پایان"
            />
          </div>

          <div className="flex items-end">
            <label className="inline-flex items-center gap-2 text-sm text-gray-700 dark:text-gray-300">
              <input
                type="checkbox"
                checked={filters.group_by_user || false}
                onChange={(e) => handleFilterChange('group_by_user', e.target.checked)}
                className="rounded border-gray-300 dark:border-gray-600"
              />
              گروه‌بندی بر اساس کاربر
            </label>
          </div>
        </div>
      </div>

      {/* Summary Cards */}
      {data?.summary && (
        <>
          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4 mb-6">
            <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-4">
              <div className="flex items-center gap-3">
                <div className="p-2 bg-blue-100 dark:bg-blue-900 rounded-lg">
                  <CreditCard className="h-5 w-5 text-blue-600 dark:text-blue-400" />
                </div>
                <div>
                  <p className="text-sm text-gray-600 dark:text-gray-400">کل تراکنش‌ها</p>
                  <p className="text-xl font-bold text-gray-900 dark:text-gray-100">
                    {formatWithThousands(data.summary.total_transactions)}
                  </p>
                </div>
              </div>
            </div>

            <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-4">
              <div className="flex items-center gap-3">
                <div className="p-2 bg-green-100 dark:bg-green-900 rounded-lg">
                  <CheckCircle className="h-5 w-5 text-green-600 dark:text-green-400" />
                </div>
                <div>
                  <p className="text-sm text-gray-600 dark:text-gray-400">تراکنش‌های موفق</p>
                  <p className="text-xl font-bold text-gray-900 dark:text-gray-100">
                    {formatWithThousands(data.summary.successful_transactions)}
                  </p>
                </div>
              </div>
            </div>

            <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-4">
              <div className="flex items-center gap-3">
                <div className="p-2 bg-red-100 dark:bg-red-900 rounded-lg">
                  <XCircle className="h-5 w-5 text-red-600 dark:text-red-400" />
                </div>
                <div>
                  <p className="text-sm text-gray-600 dark:text-gray-400">تراکنش‌های ناموفق</p>
                  <p className="text-xl font-bold text-gray-900 dark:text-gray-100">
                    {formatWithThousands(data.summary.failed_transactions)}
                  </p>
                </div>
              </div>
            </div>

            <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-4">
              <div className="flex items-center gap-3">
                <div className="p-2 bg-purple-100 dark:bg-purple-900 rounded-lg">
                  <TrendingUp className="h-5 w-5 text-purple-600 dark:text-purple-400" />
                </div>
                <div>
                  <p className="text-sm text-gray-600 dark:text-gray-400">نرخ موفقیت کلی</p>
                  <p className="text-xl font-bold text-gray-900 dark:text-gray-100">
                    {formatPercentage(data.summary.overall_success_rate)}
                  </p>
                </div>
              </div>
            </div>
          </div>

          {/* Payment Type Breakdown */}
          {Object.keys(data.summary.by_payment_type).length > 0 && (
            <>
              {/* Pie Chart and Total Amount */}
              <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 mb-6">
                {/* Pie Chart */}
                <div className="lg:col-span-2 bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-6">
                  <h3 className="text-xl font-bold text-gray-900 dark:text-gray-100 mb-6">
                    نمودار توزیع روش‌های پرداخت
                  </h3>
                  <PieChart
                    data={Object.entries(data.summary.by_payment_type).map(([type, stats]) => ({
                      name: getPaymentTypeLabel(type),
                      value: stats.percentage,
                    }))}
                    title="درصد استفاده از هر روش پرداخت"
                    colors={['#3b82f6', '#10b981', '#f59e0b', '#ef4444', '#8b5cf6', '#ec4899', '#06b6d4', '#14b8a6', '#f97316']}
                  />
                </div>

                {/* Total Amount Card */}
                <div className="bg-gradient-to-br from-yellow-50 to-yellow-100 dark:from-yellow-900/20 dark:to-yellow-800/20 shadow-sm border-2 border-yellow-200 dark:border-yellow-800 rounded-lg p-6 flex flex-col justify-center">
                  <div className="text-center">
                    <div className="inline-flex items-center justify-center w-16 h-16 bg-yellow-500 dark:bg-yellow-600 rounded-full mb-4 shadow-lg">
                      <DollarSign className="h-8 w-8 text-white" />
                    </div>
                    <p className="text-sm font-medium text-gray-600 dark:text-gray-400 mb-2">مجموع مبلغ</p>
                    <p className="text-3xl font-bold text-gray-900 dark:text-gray-100">
                      {formatCurrency(data.summary.total_amount)}
                    </p>
                  </div>
                </div>
              </div>

              {/* Payment Type Cards */}
              <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-6 mb-6">
                <h3 className="text-xl font-bold text-gray-900 dark:text-gray-100 mb-6">
                  آمار تفکیکی هر روش پرداخت
                </h3>
                <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-5 gap-4">
                  {Object.entries(data.summary.by_payment_type).map(([type, stats]) => (
                    <div
                      key={type}
                      className="border-2 border-gray-200 dark:border-gray-700 rounded-lg p-5 bg-gray-50 dark:bg-gray-700/50 hover:shadow-md transition-shadow"
                    >
                      <h4 className="font-bold text-base text-gray-900 dark:text-gray-100 mb-4 pb-2 border-b border-gray-200 dark:border-gray-600">{getPaymentTypeLabel(type)}</h4>
                      <div className="space-y-2.5 text-base">
                        <div className="flex justify-between items-center">
                          <span className="text-gray-700 dark:text-gray-300 font-medium">کل:</span>
                          <span className="font-bold text-gray-900 dark:text-gray-100">{formatWithThousands(stats.count)}</span>
                        </div>
                        <div className="flex justify-between items-center">
                          <span className="text-gray-700 dark:text-gray-300 font-medium">موفق:</span>
                          <span className="font-bold text-green-600 dark:text-green-400">{formatWithThousands(stats.success_count)}</span>
                        </div>
                        <div className="flex justify-between items-center">
                          <span className="text-gray-700 dark:text-gray-300 font-medium">ناموفق:</span>
                          <span className="font-bold text-red-600 dark:text-red-400">{formatWithThousands(stats.failed_count)}</span>
                        </div>
                        <div className="flex justify-between items-center">
                          <span className="text-gray-700 dark:text-gray-300 font-medium">نرخ موفقیت:</span>
                          <span className="font-bold text-blue-600 dark:text-blue-400">{formatPercentage(stats.success_rate)}</span>
                        </div>
                        <div className="flex justify-between items-center pt-2 border-t border-gray-200 dark:border-gray-600">
                          <span className="text-gray-700 dark:text-gray-300 font-medium">درصد از کل:</span>
                          <span className="font-bold text-purple-600 dark:text-purple-400">{formatPercentage(stats.percentage)}</span>
                        </div>
                      </div>
                    </div>
                  ))}
                </div>
              </div>
            </>
          )}
        </>
      )}

      {/* Table */}
      {isLoading ? (
        <PaymentMethodsReportSkeleton />
      ) : error ? (
        <div className="bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-lg p-4">
          <p className="text-red-600 dark:text-red-400">خطا در دریافت داده‌ها</p>
        </div>
      ) : (
        <>
          <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg">
            <div className="overflow-x-auto">
              <Table columns={columns} data={tableData} loading={isLoading} />
            </div>
          </div>

          {data && data.total > 0 && totalPages > 1 && (
            <div className="mt-4 flex justify-center">
              <Pagination
                currentPage={currentPage}
                totalPages={totalPages}
                onPageChange={handlePageChange}
                itemsPerPage={filters.limit}
                totalItems={data.total}
              />
            </div>
          )}

          {data && data.total === 0 && (
            <div className="bg-gray-50 dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg p-8 text-center">
              <p className="text-gray-600 dark:text-gray-400">داده‌ای یافت نشد</p>
            </div>
          )}
        </>
      )}
    </PageContainer>
  );
};

export default PaymentMethodsReportPage;