/**
 * ProposalDetailsCard Component
 * Displays proposal details submitted by dealer for Claim Management requests
 */

import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
import { Receipt, Calendar } from 'lucide-react';
import { format } from 'date-fns';

// Minimal local types to avoid missing imports during runtime
interface ProposalCostItem {
  description: string;
  amount?: number | null;
  gstRate?: number;
  gstAmt?: number;
  cgstAmt?: number;
  sgstAmt?: number;
  igstAmt?: number;
  quantity?: number;
  totalAmt?: number;
}

interface ProposalDetails {
  costBreakup: ProposalCostItem[];
  estimatedBudgetTotal?: number | null;
  totalEstimatedBudget?: number | null;
  timelineForClosure?: string | null;
  dealerComments?: string | null;
  submittedOn?: string | null;
}

interface ProposalDetailsCardProps {
  proposalDetails: ProposalDetails;
  className?: string;
}

export function ProposalDetailsCard({ proposalDetails, className }: ProposalDetailsCardProps) {
  // Calculate estimated total from costBreakup if not provided
  const calculateEstimatedTotal = () => {
    const total = proposalDetails.totalEstimatedBudget ?? proposalDetails.estimatedBudgetTotal;
    if (total !== undefined && total !== null) {
      return total;
    }

    // Calculate sum from costBreakup items
    if (proposalDetails.costBreakup && proposalDetails.costBreakup.length > 0) {
      const total = proposalDetails.costBreakup.reduce((sum, item) => {
        const amount = item.amount || 0;
        const gst = item.gstAmt || 0;
        const lineTotal = item.totalAmt || (Number(amount) + Number(gst));
        return sum + (Number.isNaN(lineTotal) ? 0 : lineTotal);
      }, 0);
      return total;
    }

    return 0;
  };

  const estimatedTotal = calculateEstimatedTotal();

  const formatCurrency = (amount?: number | null) => {
    if (amount === undefined || amount === null || Number.isNaN(amount)) {
      return '₹0.00';
    }
    return `₹${amount.toLocaleString('en-IN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`;
  };

  const formatDate = (dateString?: string | null) => {
    if (!dateString) return '';
    try {
      return format(new Date(dateString), 'MMM d, yyyy, h:mm a');
    } catch {
      return dateString || '';
    }
  };

  const formatTimelineDate = (dateString?: string | null) => {
    if (!dateString) return '-';
    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">
          <Receipt className="w-5 h-5 text-green-600" />
          Proposal Details
        </CardTitle>
        {proposalDetails.submittedOn && (
          <CardDescription>
            Submitted on {formatDate(proposalDetails.submittedOn)}
          </CardDescription>
        )}
      </CardHeader>
      <CardContent className="space-y-4">
        {/* Cost Breakup */}
        <div>
          <label className="text-xs font-medium text-gray-500 uppercase tracking-wide mb-3 block">
            Cost Breakup
          </label>
          <div className="border rounded-lg overflow-hidden">
            <table className="w-full">
              <thead className="bg-gray-50">
                <tr>
                  <th className="px-4 py-2 text-left text-xs font-semibold text-gray-700 uppercase tracking-wide">
                    Item Description
                  </th>
                  <th className="px-4 py-2 text-right text-xs font-semibold text-gray-700 uppercase tracking-wide">
                    Base Amount
                  </th>
                  <th className="px-4 py-2 text-right text-xs font-semibold text-gray-700 uppercase tracking-wide">
                    GST
                  </th>
                  <th className="px-4 py-2 text-right text-xs font-semibold text-gray-700 uppercase tracking-wide">
                    Total
                  </th>
                </tr>
              </thead>
              <tbody className="divide-y divide-gray-200">
                {(proposalDetails.costBreakup || []).map((item, index) => (
                  <tr key={index} className="hover:bg-gray-50">
                    <td className="px-4 py-3 text-sm text-gray-900">
                      <div>{item.description}</div>
                      {item.gstRate ? (
                        <div className="text-[10px] text-gray-400">
                          {item.cgstAmt ? `CGST: ${item.gstRate / 2}%, SGST: ${item.gstRate / 2}%` : `IGST: ${item.gstRate}%`}
                        </div>
                      ) : null}
                    </td>
                    <td className="px-4 py-3 text-sm text-gray-900 text-right">
                      {formatCurrency(item.amount)}
                    </td>
                    <td className="px-4 py-3 text-sm text-gray-900 text-right">
                      {formatCurrency(item.gstAmt)}
                    </td>
                    <td className="px-4 py-3 text-sm text-gray-900 text-right font-medium">
                      {formatCurrency(item.totalAmt || (Number(item.amount || 0) + Number(item.gstAmt || 0)))}
                    </td>
                  </tr>
                ))}
                <tr className="bg-green-50 font-semibold">
                  <td colSpan={3} className="px-4 py-3 text-sm text-gray-900">
                    Estimated Budget (Total Inclusive of GST)
                  </td>
                  <td className="px-4 py-3 text-sm text-green-700 text-right">
                    {formatCurrency(estimatedTotal)}
                  </td>
                </tr>
              </tbody>
            </table>
          </div>
        </div>

        {/* Timeline for Closure */}
        <div className="pt-2">
          <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
            Timeline for Closure
          </label>
          <div className="mt-2 bg-blue-50 border border-blue-200 rounded-lg p-3">
            <div className="flex items-center gap-2">
              <Calendar className="w-4 h-4 text-blue-600" />
              <span className="text-sm font-medium text-gray-900">
                Expected completion by: {formatTimelineDate(proposalDetails.timelineForClosure)}
              </span>
            </div>
          </div>
        </div>

        {/* Dealer Comments */}
        {proposalDetails.dealerComments && (
          <div className="pt-2">
            <label className="text-xs font-medium text-gray-500 uppercase tracking-wide">
              Dealer Comments
            </label>
            <p className="text-sm text-gray-700 mt-2 bg-gray-50 p-3 rounded-lg whitespace-pre-line">
              {proposalDetails.dealerComments}
            </p>
          </div>
        )}
      </CardContent>
    </Card>
  );
}
