import React, { useMemo } from 'react';
import { useTranslation } from 'react-i18next';
import { GripVertical, X, Users, UserPlus, UserCheck } from 'lucide-react';
import { PieChart, Pie, Cell, ResponsiveContainer, Tooltip } from 'recharts';
import { Customer } from '../../types';

interface CustomerBreakdownWidgetProps {
  customers: Customer[];
  isEditing?: boolean;
  onRemove?: () => void;
}

const CustomerBreakdownWidget: React.FC<CustomerBreakdownWidgetProps> = ({
  customers,
  isEditing,
  onRemove,
}) => {
  const { t } = useTranslation();
  const breakdownData = useMemo(() => {
    // Customers with lastVisit are returning, without are new
    const returning = customers.filter((c) => c.lastVisit !== null).length;
    const newCustomers = customers.filter((c) => c.lastVisit === null).length;
    const total = customers.length;

    return {
      new: newCustomers,
      returning,
      total,
      newPercentage: total > 0 ? Math.round((newCustomers / total) * 100) : 0,
      returningPercentage: total > 0 ? Math.round((returning / total) * 100) : 0,
      chartData: [
        { name: 'New', value: newCustomers, color: '#8b5cf6' },
        { name: 'Returning', value: returning, color: '#10b981' },
      ],
    };
  }, [customers]);

  return (
    <div className="h-full p-3 bg-white dark:bg-gray-800 rounded-xl border border-gray-200 dark:border-gray-700 shadow-sm relative group flex flex-col">
      {isEditing && (
        <>
          <div className="absolute top-2 left-2 cursor-grab active:cursor-grabbing text-gray-400 hover:text-gray-600 dark:hover:text-gray-300 drag-handle">
            <GripVertical size={16} />
          </div>
          <button
            onClick={onRemove}
            className="absolute top-2 right-2 p-1 text-gray-400 hover:text-red-500 dark:hover:text-red-400 opacity-0 group-hover:opacity-100 transition-opacity"
          >
            <X size={14} />
          </button>
        </>
      )}

      <h3 className={`text-base font-semibold text-gray-900 dark:text-white mb-2 ${isEditing ? 'pl-5' : ''}`}>
        Customers This Month
      </h3>

      <div className="flex-1 flex items-center gap-3 min-h-0">
        {/* Pie Chart */}
        <div className="w-20 h-20 flex-shrink-0">
          <ResponsiveContainer width="100%" height="100%">
            <PieChart>
              <Pie
                data={breakdownData.chartData}
                cx="50%"
                cy="50%"
                innerRadius={20}
                outerRadius={35}
                paddingAngle={2}
                dataKey="value"
              >
                {breakdownData.chartData.map((entry, index) => (
                  <Cell key={`cell-${index}`} fill={entry.color} />
                ))}
              </Pie>
              <Tooltip
                contentStyle={{
                  borderRadius: '8px',
                  border: 'none',
                  boxShadow: '0 4px 6px -1px rgb(0 0 0 / 0.1)',
                  backgroundColor: '#1F2937',
                  color: '#F3F4F6',
                }}
              />
            </PieChart>
          </ResponsiveContainer>
        </div>

        {/* Stats */}
        <div className="flex-1 space-y-2">
          <div className="flex items-center gap-2">
            <div className="p-1 rounded-lg bg-purple-100 dark:bg-purple-900/30">
              <UserPlus size={12} className="text-purple-600 dark:text-purple-400" />
            </div>
            <div>
              <p className="text-xs text-gray-500 dark:text-gray-400">New</p>
              <p className="text-base font-semibold text-gray-900 dark:text-white">
                {breakdownData.new}{' '}
                <span className="text-xs font-normal text-gray-400">
                  ({breakdownData.newPercentage}%)
                </span>
              </p>
            </div>
          </div>

          <div className="flex items-center gap-2">
            <div className="p-1 rounded-lg bg-green-100 dark:bg-green-900/30">
              <UserCheck size={12} className="text-green-600 dark:text-green-400" />
            </div>
            <div>
              <p className="text-xs text-gray-500 dark:text-gray-400">Returning</p>
              <p className="text-base font-semibold text-gray-900 dark:text-white">
                {breakdownData.returning}{' '}
                <span className="text-xs font-normal text-gray-400">
                  ({breakdownData.returningPercentage}%)
                </span>
              </p>
            </div>
          </div>
        </div>
      </div>

      <div className="mt-2 pt-2 border-t border-gray-100 dark:border-gray-700 flex-shrink-0">
        <div className="flex items-center justify-between text-sm">
          <div className="flex items-center gap-1 text-gray-500 dark:text-gray-400">
            <Users size={12} />
            <span>{t('dashboard.totalCustomers')}</span>
          </div>
          <span className="font-semibold text-gray-900 dark:text-white">{breakdownData.total}</span>
        </div>
      </div>
    </div>
  );
};

export default CustomerBreakdownWidget;