'use client';

import {
  createColumnHelper,
  flexRender,
  getCoreRowModel,
  getSortedRowModel,
  useReactTable,
  type SortingState,
} from '@tanstack/react-table';
import { ArrowUpDown, MapPin } from 'lucide-react';
import { useState } from 'react';
import { Badge } from '@/components/ui/badge';
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from '@/components/ui/card';
import { formatPrice, formatPricePerM2 } from '@/lib/currency';
import type { ValuationComparable } from '@/lib/valuation-api';

interface ComparablesTableProps {
  comparables: ValuationComparable[];
}

const columnHelper = createColumnHelper<ValuationComparable>();

function getSimilarityBadge(similarity: number): {
  label: string;
  variant: 'success' | 'warning' | 'info';
} {
  const pct = Math.round(similarity * 100);
  if (pct >= 85) return { label: `${pct}% tương tự`, variant: 'success' };
  if (pct >= 70) return { label: `${pct}% tương tự`, variant: 'info' };
  return { label: `${pct}% tương tự`, variant: 'warning' };
}

const columns = [
  columnHelper.accessor('title', {
    header: 'Bất động sản',
    cell: (info) => {
      const row = info.row.original;
      return (
        <div className="min-w-0">
          <p className="truncate font-medium">{info.getValue()}</p>
          <p className="flex items-center gap-1 text-xs text-muted-foreground">
            <MapPin className="h-3 w-3" />
            {row.district}
            {row.address ? ` — ${row.address}` : ''}
          </p>
        </div>
      );
    },
  }),
  columnHelper.accessor('areaM2', {
    header: 'Diện tích',
    cell: (info) => <span className="whitespace-nowrap">{info.getValue()} m²</span>,
  }),
  columnHelper.accessor('priceVND', {
    header: 'Giá',
    cell: (info) => (
      <span className="whitespace-nowrap font-semibold text-primary">
        {formatPrice(info.getValue())}
      </span>
    ),
  }),
  columnHelper.accessor('pricePerM2', {
    header: 'Giá/m²',
    cell: (info) => (
      <span className="whitespace-nowrap text-muted-foreground">
        {formatPricePerM2(info.getValue())}
      </span>
    ),
  }),
  columnHelper.accessor('similarity', {
    header: 'Tương đồng',
    cell: (info) => {
      const badge = getSimilarityBadge(info.getValue());
      return <Badge variant={badge.variant}>{badge.label}</Badge>;
    },
    sortDescFirst: true,
  }),
];

export function ComparablesTable({ comparables }: ComparablesTableProps) {
  const [sorting, setSorting] = useState<SortingState>([
    { id: 'similarity', desc: true },
  ]);

  const table = useReactTable({
    data: comparables,
    columns,
    state: { sorting },
    onSortingChange: setSorting,
    getCoreRowModel: getCoreRowModel(),
    getSortedRowModel: getSortedRowModel(),
  });

  if (comparables.length === 0) return null;

  return (
    <Card>
      <CardHeader>
        <CardTitle className="text-lg">Bất động sản tương tự</CardTitle>
        <CardDescription>
          {comparables.length} bất động sản có đặc điểm tương tự trong khu vực
        </CardDescription>
      </CardHeader>
      <CardContent>
        <div className="overflow-x-auto">
          <table className="w-full text-sm">
            <thead>
              {table.getHeaderGroups().map((headerGroup) => (
                <tr key={headerGroup.id} className="border-b text-left">
                  {headerGroup.headers.map((header) => (
                    <th
                      key={header.id}
                      className="pb-2 pr-4 font-medium"
                    >
                      {header.isPlaceholder ? null : (
                        <button
                          type="button"
                          className="flex items-center gap-1 hover:text-foreground"
                          onClick={header.column.getToggleSortingHandler()}
                        >
                          {flexRender(
                            header.column.columnDef.header,
                            header.getContext(),
                          )}
                          <ArrowUpDown className="h-3 w-3 text-muted-foreground" />
                        </button>
                      )}
                    </th>
                  ))}
                </tr>
              ))}
            </thead>
            <tbody>
              {table.getRowModel().rows.map((row) => (
                <tr key={row.id} className="border-b last:border-0">
                  {row.getVisibleCells().map((cell) => (
                    <td key={cell.id} className="py-2 pr-4">
                      {flexRender(cell.column.columnDef.cell, cell.getContext())}
                    </td>
                  ))}
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      </CardContent>
    </Card>
  );
}