"use client";

import { useState } from "react";
import {
  type ColumnDef,
  type SortingState,
  flexRender,
  getCoreRowModel,
  getFilteredRowModel,
  getPaginationRowModel,
  getSortedRowModel,
  useReactTable,
} from "@tanstack/react-table";
import { ChevronLeft, ChevronRight, ChevronsUpDown, Search } from "lucide-react";

type DataTableProps<T> = {
  columns: ColumnDef<T, unknown>[];
  data: T[];
  searchPlaceholder?: string;
  emptyMessage?: string;
};

export function DataTable<T>({
  columns,
  data,
  searchPlaceholder = "Search…",
  emptyMessage = "No results.",
}: DataTableProps<T>) {
  const [globalFilter, setGlobalFilter] = useState("");
  const [sorting, setSorting] = useState<SortingState>([]);

  const table = useReactTable({
    data,
    columns,
    state: { globalFilter, sorting },
    onGlobalFilterChange: setGlobalFilter,
    onSortingChange: setSorting,
    getCoreRowModel: getCoreRowModel(),
    getFilteredRowModel: getFilteredRowModel(),
    getSortedRowModel: getSortedRowModel(),
    getPaginationRowModel: getPaginationRowModel(),
    initialState: { pagination: { pageSize: 15 } },
  });

  return (
    <div>
      <div className="relative mb-4 max-w-xs">
        <Search className="text-brand-muted pointer-events-none absolute top-1/2 left-3 h-4 w-4 -translate-y-1/2" />
        <input
          value={globalFilter}
          onChange={(e) => setGlobalFilter(e.target.value)}
          placeholder={searchPlaceholder}
          className="w-full border border-brand-ink/15 bg-brand-white py-2 pr-3 pl-9 text-sm"
        />
      </div>

      <div className="overflow-x-auto border border-brand-ink/10">
        <table className="w-full text-sm">
          <thead className="bg-brand-ink text-brand-white">
            {table.getHeaderGroups().map((headerGroup) => (
              <tr key={headerGroup.id}>
                {headerGroup.headers.map((header) => (
                  <th key={header.id} className="p-3 text-left font-normal">
                    {header.isPlaceholder ? null : (
                      <button
                        type="button"
                        onClick={header.column.getToggleSortingHandler()}
                        className="flex items-center gap-1 disabled:cursor-default"
                        disabled={!header.column.getCanSort()}
                      >
                        {flexRender(header.column.columnDef.header, header.getContext())}
                        {header.column.getCanSort() && <ChevronsUpDown className="h-3 w-3 opacity-60" />}
                      </button>
                    )}
                  </th>
                ))}
              </tr>
            ))}
          </thead>
          <tbody className="bg-brand-white">
            {table.getRowModel().rows.length === 0 ? (
              <tr>
                <td colSpan={columns.length} className="text-brand-muted p-6 text-center">
                  {emptyMessage}
                </td>
              </tr>
            ) : (
              table.getRowModel().rows.map((row) => (
                <tr key={row.id} className="border-t border-brand-ink/10">
                  {row.getVisibleCells().map((cell) => (
                    <td key={cell.id} className="p-3">
                      {flexRender(cell.column.columnDef.cell, cell.getContext())}
                    </td>
                  ))}
                </tr>
              ))
            )}
          </tbody>
        </table>
      </div>

      {table.getPageCount() > 1 && (
        <div className="mt-4 flex items-center justify-between text-sm">
          <span className="text-brand-muted">
            Page {table.getState().pagination.pageIndex + 1} of {table.getPageCount()}
          </span>
          <div className="flex gap-2">
            <button
              onClick={() => table.previousPage()}
              disabled={!table.getCanPreviousPage()}
              className="border border-brand-ink/15 p-1.5 disabled:opacity-30"
              aria-label="Previous page"
            >
              <ChevronLeft className="h-4 w-4" />
            </button>
            <button
              onClick={() => table.nextPage()}
              disabled={!table.getCanNextPage()}
              className="border border-brand-ink/15 p-1.5 disabled:opacity-30"
              aria-label="Next page"
            >
              <ChevronRight className="h-4 w-4" />
            </button>
          </div>
        </div>
      )}
    </div>
  );
}