/**
 * ActivityInformationCard Component
 * Displays activity details for Claim Management requests
 */

import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Calendar, MapPin, DollarSign, Receipt } from 'lucide-react';
import { ClaimActivityInfo } from '@/pages/RequestDetail/types/claimManagement.types';
import { format } from 'date-fns';
import { formatDateTime } from '@/utils/dateFormatter';

interface ActivityInformationCardProps {
  activityInfo: ClaimActivityInfo;
  className?: string;
  // Plug-and-play: Pass timestamps from module's business logic
  createdAt?: string | Date;
  updatedAt?: string | Date;
}

export function ActivityInformationCard({ 
  activityInfo, 
  className,
  createdAt,
  updatedAt 
}: ActivityInformationCardProps) {
  // Defensive check: Ensure activityInfo exists
  if (!activityInfo) {
    console.warn('[ActivityInformationCard] activityInfo is missing');
    return (
      <Card className={className}>
        <CardContent className="py-8 text-center text-gray-500">
          <p>Activity information not available</p>
        </CardContent>
      </Card>
    );
  }

  const formatCurrency = (amount: string | number) => {
    const numAmount = typeof amount === 'string' ? parseFloat(amount) : amount;
    if (isNaN(numAmount)) return 'N/A';
    return `₹${numAmount.toLocaleString('en-IN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`;
  };

  const formatDate = (dateString?: string) => {
    if (!dateString) return 'N/A';
    try {
      return format(new Date(dateString), 'MMM d, yyyy');
    } catch {
      return dateString;
    }
  };

  return (
    <Card className={className}>
      <CardHeader>
        <CardTitle className="flex items-center gap-2 text-base">
          <Calendar className="w-5 h-5 text-blue-600" />
          Activity Information
        </CardTitle>
      </CardHeader>
      <CardContent className="space-y-4">
        <div className="grid grid-cols-2 gap-4">
          {/* Activity Name */}
          <div>
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
              Activity Name
            </label>
            <p className="text-sm text-gray-900 font-medium mt-1">
              {activityInfo.activityName}
            </p>
          </div>

          {/* Activity Type */}
          <div>
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
              Activity Type
            </label>
            <p className="text-sm text-gray-900 font-medium mt-1">
              {activityInfo.activityType}
            </p>
          </div>

          {/* Location */}
          <div>
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
              Location
            </label>
            <p className="text-sm text-gray-900 font-medium mt-1 flex items-center gap-2">
              <MapPin className="w-4 h-4 text-gray-400" />
              {activityInfo.location}
            </p>
          </div>

          {/* Requested Date */}
          <div>
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
              Requested Date
            </label>
            <p className="text-sm text-gray-900 font-medium mt-1">
              {formatDate(activityInfo.requestedDate)}
            </p>
          </div>

          {/* Estimated Budget */}
          <div>
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
              Estimated Budget
            </label>
            <p className="text-sm text-gray-900 font-medium mt-1 flex items-center gap-2">
              <DollarSign className="w-4 h-4 text-green-600" />
              {activityInfo.estimatedBudget 
                ? formatCurrency(activityInfo.estimatedBudget)
                : 'TBD'}
            </p>
          </div>

          {/* Closed Expenses - Show if value exists (including 0) */}
          {activityInfo.closedExpenses !== undefined && activityInfo.closedExpenses !== null && (
            <div>
              <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
                Closed Expenses
              </label>
              <p className="text-sm text-gray-900 font-medium mt-1 flex items-center gap-2">
                <Receipt className="w-4 h-4 text-blue-600" />
                {formatCurrency(activityInfo.closedExpenses)}
              </p>
            </div>
          )}

          {/* Period */}
          {activityInfo.period && (
            <div className="col-span-2">
              <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
                Period
              </label>
              <p className="text-sm text-gray-900 font-medium mt-1">
                {formatDate(activityInfo.period.startDate)} - {formatDate(activityInfo.period.endDate)}
              </p>
            </div>
          )}
        </div>

        {/* Closed Expenses Breakdown */}
        {activityInfo.closedExpensesBreakdown && activityInfo.closedExpensesBreakdown.length > 0 && (
          <div className="pt-4 border-t">
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide mb-3 block">
              Closed Expenses Breakdown
            </label>
            <div className="bg-blue-50 border border-blue-200 rounded-lg p-3 space-y-2">
              {activityInfo.closedExpensesBreakdown.map((item: { description: string; amount: number }, index: number) => (
                <div key={index} className="flex justify-between items-center text-sm">
                  <span className="text-gray-700">{item.description}</span>
                  <span className="font-medium text-gray-900">
                    {formatCurrency(item.amount)}
                  </span>
                </div>
              ))}
              <div className="pt-2 border-t border-blue-300 flex justify-between items-center">
                <span className="font-semibold text-gray-900">Total</span>
                <span className="font-bold text-blue-600">
                  {formatCurrency(
                    activityInfo.closedExpensesBreakdown.reduce((sum: number, item: { description: string; amount: number }) => sum + item.amount, 0)
                  )}
                </span>
              </div>
            </div>
          </div>
        )}

        {/* Description */}
        {activityInfo.description && (
          <div className="pt-4 border-t">
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
              Description
            </label>
            <p className="text-sm text-gray-700 mt-2 bg-gray-50 p-3 rounded-lg whitespace-pre-line">
              {activityInfo.description}
            </p>
          </div>
        )}

        {/* Timestamps - Similar to Request Details Card */}
        {(createdAt || updatedAt) && (
          <div className="grid grid-cols-2 gap-4 pt-4 border-t border-gray-300">
            {createdAt && (
              <div>
                <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">Created</label>
                <p className="text-sm text-gray-900 font-medium mt-1">{formatDateTime(createdAt)}</p>
              </div>
            )}
            {updatedAt && (
              <div>
                <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">Last Updated</label>
                <p className="text-sm text-gray-900 font-medium mt-1">{formatDateTime(updatedAt)}</p>
              </div>
            )}
          </div>
        )}
      </CardContent>
    </Card>
  );
}