import { ReactNode } from 'react';
import { ArrowUpDown, ChevronLeft, ChevronRight, MoreHorizontal } from 'lucide-react';
import { cn } from '../../lib/utils';
import { EmptyState } from './LinearPrimitives'; // Re-use the AuraUI empty state

// --- Types ---

export interface Column<T> {
    key: keyof T | string; // 'tag', 'strain.name', etc.
    header: string;
    cell: (row: T) => ReactNode; // Custom renderer
    sortable?: boolean;
    className?: string; // e.g. 'text-right', 'w-24'
    hideOnMobile?: boolean;
}

interface DataTableProps<T> {
    data: T[];
    columns: Column<T>[];
    onRowClick?: (row: T) => void;
    isLoading?: boolean;
    emptyState?: ReactNode; // Custom empty state or default
}

// --- Component ---

export function DataTable<T extends { id: string | number }>({
    data,
    columns,
    onRowClick,
    isLoading,
    emptyState,
}: DataTableProps<T>) {

    if (isLoading) {
        return (
            <div className="w-full border border-[var(--color-border-subtle)] rounded-lg overflow-hidden bg-white dark:bg-slate-950">
                <div className="border-b border-[var(--color-border-subtle)] bg-slate-50/50 dark:bg-slate-900/50 px-4 py-3 h-10 flex items-center gap-4">
                    {/* Skeleton Header */}
                    <div className="h-4 w-24 bg-slate-200 dark:bg-slate-800 rounded animate-pulse" />
                    <div className="h-4 w-24 bg-slate-200 dark:bg-slate-800 rounded animate-pulse" />
                    <div className="h-4 w-24 bg-slate-200 dark:bg-slate-800 rounded animate-pulse" />
                </div>
                <div>
                    {Array.from({ length: 5 }).map((_, i) => (
                        <div key={i} className="px-4 py-4 border-b border-[var(--color-border-subtle)]/50 flex items-center gap-4">
                            <div className="h-4 w-1/4 bg-slate-100 dark:bg-slate-800 rounded animate-pulse" />
                            <div className="h-4 w-1/4 bg-slate-100 dark:bg-slate-800 rounded animate-pulse" />
                            <div className="h-4 w-1/4 bg-slate-100 dark:bg-slate-800 rounded animate-pulse" />
                        </div>
                    ))}
                </div>
            </div>
        );
    }

    if (data.length === 0) {
        if (emptyState) return <>{emptyState}</>;
        return (
            <div className="border border-[var(--color-border-subtle)] rounded-lg bg-slate-50/50 dark:bg-slate-950/50 p-12 flex flex-col items-center justify-center text-center">
                <p className="text-[var(--color-text-tertiary)]">No records found</p>
            </div>
        );
    }

    return (
        <div className="w-full border border-[var(--color-border-subtle)] rounded-lg overflow-hidden bg-white dark:bg-slate-950 shadow-sm">
            <div className="overflow-x-auto">
                <table className="w-full text-left text-sm">
                    {/* Header */}
                    <thead className="bg-[var(--color-bg-tertiary)]/50 text-[var(--color-text-tertiary)] font-medium border-b border-[var(--color-border-subtle)]">
                        <tr>
                            {columns.map((col, idx) => (
                                <th
                                    key={String(col.key) + idx}
                                    className={cn(
                                        "px-4 py-3 whitespace-nowrap transition-colors",
                                        col.sortable && "cursor-pointer hover:bg-slate-100 dark:hover:bg-slate-800 hover:text-slate-700 dark:hover:text-slate-300",
                                        col.hideOnMobile && "hidden md:table-cell",
                                        col.className
                                    )}
                                >
                                    <div className="flex items-center gap-1">
                                        {col.header}
                                        {col.sortable && <ArrowUpDown className="h-3 w-3 opacity-50" />}
                                    </div>
                                </th>
                            ))}
                        </tr>
                    </thead>

                    {/* Body */}
                    <tbody className="divide-y divide-slate-100 dark:divide-slate-800/50">
                        {data.map((row) => (
                            <tr
                                key={row.id}
                                onClick={() => onRowClick && onRowClick(row)}
                                className={cn(
                                    "group transition-colors",
                                    onRowClick
                                        ? "cursor-pointer hover:bg-slate-50 dark:hover:bg-slate-900/40"
                                        : "",
                                    "bg-white dark:bg-slate-950"
                                )}
                            >
                                {columns.map((col, idx) => (
                                    <td
                                        key={String(col.key) + idx}
                                        className={cn(
                                            "px-4 py-3 align-middle text-[var(--color-text-secondary)]",
                                            col.hideOnMobile && "hidden md:table-cell",
                                            col.className
                                        )}
                                    >
                                        {col.cell(row)}
                                    </td>
                                ))}
                            </tr>
                        ))}
                    </tbody>
                </table>
            </div>

            {/* Optional Footer/Pagination area could go here */}
        </div>
    );
}
