'use client';

import { useState, useTransition } from 'react';
import { useRouter, useSearchParams } from 'next/navigation';
import { Pencil, ArrowUp, ArrowDown, ArrowUpDown } from 'lucide-react';
import Link from 'next/link';
import { DeleteButton } from '@/components/DeleteButton';
import { ColumnFilter } from './ColumnFilter';
import { FieldDefinition } from '@/lib/schema';
import { updateUserPreferencesAction } from '@/app/actions/user';

interface DataTableProps {
  entity: string;
  collectionId: string;
  documents: any[];
  fieldsConfig: FieldDefinition[];
  initialHiddenColumns: string[];
  currentSortField: string;
  currentSortDir: 'asc' | 'desc';
  user: any;
}

export const DataTable = ({
  entity,
  collectionId,
  documents,
  fieldsConfig,
  initialHiddenColumns,
  currentSortField,
  currentSortDir,
  user
}: DataTableProps) => {
  const router = useRouter();
  const searchParams = useSearchParams();
  const [isPending, startTransition] = useTransition();
  const [visibleColumns, setVisibleColumns] = useState<string[]>(() => {
    const allFields = fieldsConfig.map(f => f.name);
    return allFields.filter(f => !initialHiddenColumns.includes(f));
  });

  const handleColumnChange = async (newVisible: string[]) => {
    setVisibleColumns(newVisible);
    
    // Calculate hidden columns to persist
    const allFields = fieldsConfig.map(f => f.name);
    const hidden = allFields.filter(f => !newVisible.includes(f));
    
    // Persist to Appwrite Prefs
    await updateUserPreferencesAction({
        hiddenColumns: {
            [entity]: hidden
        }
    });
  };

  const toggleSort = (field: string) => {
    const params = new URLSearchParams(searchParams.toString());
    let newDir: 'asc' | 'desc' = 'desc';
    
    if (currentSortField === field) {
        newDir = currentSortDir === 'desc' ? 'asc' : 'desc';
    }
    
    params.set('sort', field);
    params.set('dir', newDir);
    
    startTransition(() => {
        router.push(`?${params.toString()}`);
    });
  };

  const getHeaderLabel = (key: string) => {
    const field = fieldsConfig.find(f => f.name === key);
    return field ? field.label : key.replace(/_/g, ' ');
  };

  const renderSortIcon = (field: string) => {
    if (currentSortField !== field) return <ArrowUpDown size={14} className="opacity-20 group-hover:opacity-100 transition-opacity" />;
    return currentSortDir === 'asc' ? <ArrowUp size={14} className="text-cyan-400" /> : <ArrowDown size={14} className="text-cyan-400" />;
  };

  return (
    <div className="space-y-4">
      <div className="flex justify-end pr-4">
        <ColumnFilter 
          fields={fieldsConfig} 
          visibleColumns={visibleColumns} 
          onChange={handleColumnChange} 
        />
      </div>

      <div className="bg-slate-900/50 backdrop-blur-xl border border-slate-800 rounded-2xl overflow-hidden shadow-2xl relative">
        {isPending && (
            <div className="absolute inset-0 bg-slate-950/20 backdrop-blur-[1px] z-50 flex items-center justify-center">
                <div className="w-8 h-8 border-4 border-cyan-500/20 border-t-cyan-500 rounded-full animate-spin"></div>
            </div>
        )}

        <div className="overflow-x-auto p-4 custom-scrollbar">
          <table className="w-full text-left text-sm whitespace-nowrap">
            <thead className="bg-slate-950 border-b border-slate-800 text-cyan-500 uppercase text-xs font-black tracking-widest">
              <tr>
                {fieldsConfig.map(field => {
                  if (!visibleColumns.includes(field.name)) return null;
                  return (
                    <th 
                      key={field.name} 
                      className="px-6 py-5 cursor-pointer group select-none hover:bg-slate-900/50 transition-colors"
                      onClick={() => toggleSort(field.name)}
                    >
                      <div className="flex items-center gap-2">
                        {field.label}
                        {renderSortIcon(field.name)}
                      </div>
                    </th>
                  );
                })}
                <th className="px-6 py-5 text-center">Acciones</th>
              </tr>
            </thead>
            <tbody className="divide-y divide-slate-800/60">
              {documents.map((doc) => {
                const canEdit = user?.$id === 'admin-emergency' || user?.labels?.includes('admin') || user?.labels?.includes('editor');
                
                return (
                  <tr 
                    key={doc.$id} 
                    className={`transition-colors group ${canEdit ? 'hover:bg-cyan-500/5 cursor-pointer' : 'hover:bg-slate-800/50'}`}
                    onClick={() => {
                      if (canEdit) {
                        router.push(`/dashboard/${entity}/${doc.$id}`);
                      }
                    }}
                  >
                  {fieldsConfig.map(field => {
                    if (!visibleColumns.includes(field.name)) return null;
                    
                    let value = doc[field.name];

                    // Resolve Relations
                    if (typeof value === 'object' && value !== null) {
                      if (field.type === 'relation' && field.relationLabel) {
                         value = value[field.relationLabel] || value.$id || '[Vinculado]';
                      } else {
                         value = Array.isArray(value) ? `[Lista (${value.length})]` : value.$id || '[Vinculado]';
                      }
                    }

                    if (typeof value === 'boolean') {
                      value = value ? 'Sí' : 'No';
                    }
                    if (typeof value === 'string' && value.length > 60) {
                      value = value.substring(0, 60) + '...';
                    }
                    
                    return (
                      <td key={field.name} className="px-6 py-4 text-slate-300 font-medium group-hover:text-white transition-colors">
                        {String(value || '')}
                      </td>
                    )
                  })}
                  <td className="px-6 py-4 text-center space-x-2 w-24">
                    <Link href={`/dashboard/${entity}/${doc.$id}`} className="inline-flex p-2 text-slate-400 hover:text-cyan-400 hover:bg-cyan-500/10 rounded-lg transition-colors border border-transparent hover:border-cyan-500/20" title="Editar Registro">
                      <Pencil size={16} />
                    </Link>
                    <DeleteButton collectionId={collectionId} documentId={doc.$id} entityAlias={entity} />
                  </td>
                </tr>
              )})}
            </tbody>
          </table>
        </div>
      </div>
    </div>
  );
};