'use client';

import { useState, useEffect } from 'react';
import Link from 'next/link';
import { Input } from '@/components/ui/Input';

export interface CheckboxItemData {
  id: string;
  text: string;
  isChecked: boolean;
  type?: 'task' | 'meeting' | string;
  taskId?: string;
  task?: {
    id: string;
    title: string;
  };
}

interface CheckboxItemProps {
  item: CheckboxItemData;
  onToggle: (itemId: string) => Promise<void>;
  onUpdate: (itemId: string, text: string, type?: string, taskId?: string) => Promise<void>;
  onDelete: (itemId: string) => Promise<void>;
  saving?: boolean;
  showTypeIndicator?: boolean;
  showTaskLink?: boolean;
  showEditButton?: boolean;
  showDeleteButton?: boolean;
  className?: string;
}

export function CheckboxItem({ 
  item, 
  onToggle, 
  onUpdate,
  onDelete, 
  saving = false,
  showTaskLink = true,
  showEditButton = true,
  showDeleteButton = true,
  className = ''
}: CheckboxItemProps) {
  const [inlineEditingId, setInlineEditingId] = useState<string | null>(null);
  const [inlineEditingText, setInlineEditingText] = useState('');
  const [optimisticChecked, setOptimisticChecked] = useState<boolean | null>(null);

  // État optimiste local pour une réponse immédiate
  const isChecked = optimisticChecked !== null ? optimisticChecked : item.isChecked;

  // Synchroniser l'état optimiste avec les changements externes
  useEffect(() => {
    if (optimisticChecked !== null && optimisticChecked === item.isChecked) {
      // L'état serveur a été mis à jour, on peut reset l'optimiste
      setOptimisticChecked(null);
    }
  }, [item.isChecked, optimisticChecked]);

  // Handler optimiste pour le toggle
  const handleOptimisticToggle = async () => {
    const newCheckedState = !isChecked;
    
    // Mise à jour optimiste immédiate
    setOptimisticChecked(newCheckedState);
    
    try {
      await onToggle(item.id);
      // Reset l'état optimiste après succès
      setOptimisticChecked(null);
    } catch (error) {
      // Rollback en cas d'erreur
      setOptimisticChecked(null);
      console.error('Erreur lors du toggle:', error);
    }
  };

  // Édition inline simple
  const handleStartInlineEdit = () => {
    setInlineEditingId(item.id);
    setInlineEditingText(item.text);
  };

  const handleSaveInlineEdit = async () => {
    if (!inlineEditingText.trim()) return;

    try {
      await onUpdate(item.id, inlineEditingText.trim(), item.type, item.taskId);
      setInlineEditingId(null);
      setInlineEditingText('');
    } catch (error) {
      console.error('Erreur lors de la modification:', error);
    }
  };

  const handleCancelInlineEdit = () => {
    setInlineEditingId(null);
    setInlineEditingText('');
  };

  const handleInlineEditKeyPress = (e: React.KeyboardEvent) => {
    if (e.key === 'Enter') {
      e.preventDefault();
      handleSaveInlineEdit();
    } else if (e.key === 'Escape') {
      e.preventDefault();
      handleCancelInlineEdit();
    }
  };

  // Obtenir la couleur de bordure selon le type
  const getTypeBorderColor = () => {
    if (item.type === 'meeting') return 'border-l-blue-500';
    return 'border-l-green-500';
  };

  return (
    <div className={`flex items-center gap-3 px-3 py-2 sm:py-1.5 sm:gap-2 rounded border transition-colors group border-l-4 ${getTypeBorderColor()} border-t-[var(--border)]/30 border-r-[var(--border)]/30 border-b-[var(--border)]/30 hover:border-t-[var(--border)] hover:border-r-[var(--border)] hover:border-b-[var(--border)] ${className}`}>
      {/* Checkbox */}
      <input
        type="checkbox"
        checked={isChecked}
        onChange={handleOptimisticToggle}
        disabled={saving}
        className="w-4 h-4 md:w-3.5 md:h-3.5 rounded border border-[var(--border)] text-[var(--primary)] focus:ring-[var(--primary)]/20 focus:ring-1"
      />
      
      {/* Contenu principal */}
      {inlineEditingId === item.id ? (
        <Input
          value={inlineEditingText}
          onChange={(e) => setInlineEditingText(e.target.value)}
          onKeyDown={handleInlineEditKeyPress}
          onBlur={handleSaveInlineEdit}
          autoFocus
          className="flex-1 h-7 text-sm"
        />
      ) : (
        <div className="flex-1 flex items-center gap-2">
          {/* Texte cliquable pour édition inline */}
          <span 
            className={`flex-1 text-sm sm:text-xs font-mono transition-all cursor-pointer hover:bg-[var(--muted)]/50 py-0.5 px-1 rounded ${
              item.isChecked 
                ? 'line-through text-[var(--muted-foreground)]' 
                : 'text-[var(--foreground)]'
            }`}
            onClick={handleStartInlineEdit}
            title="Cliquer pour éditer le texte"
          >
            {item.text}
          </span>

          {/* Icône d'édition avancée */}
          {showEditButton && (
            <button
              onClick={() => {
                // Pour l'instant, on utilise l'édition inline
                // Plus tard, on pourra ajouter une modal d'édition avancée
                handleStartInlineEdit();
              }}
              disabled={saving}
              className="opacity-0 group-hover:opacity-100 w-5 h-5 rounded-full bg-[var(--muted)]/50 hover:bg-[var(--muted)] border border-[var(--border)]/30 hover:border-[var(--border)] flex items-center justify-center transition-all duration-200 text-[var(--foreground)] text-xs"
              title="Éditer le texte"
            >
              ✏️
            </button>
          )}
        </div>
      )}

      {/* Lien vers la tâche si liée */}
      {showTaskLink && item.task && (
        <Link
          href={`/kanban?taskId=${item.task.id}`}
          className="text-xs text-[var(--primary)] hover:text-[var(--primary)]/80 font-mono truncate max-w-[100px]"
          title={`Tâche: ${item.task.title}`}
        >
          {item.task.title}
        </Link>
      )}

      {/* Bouton de suppression */}
      {showDeleteButton && (
        <button
          onClick={() => onDelete(item.id)}
          disabled={saving}
          className="opacity-0 group-hover:opacity-100 w-5 h-5 rounded-full bg-[var(--destructive)]/20 hover:bg-[var(--destructive)]/30 border border-[var(--destructive)]/30 hover:border-[var(--destructive)]/50 flex items-center justify-center transition-all duration-200 text-[var(--destructive)] text-xs"
          title="Supprimer"
        >
          ×
        </button>
      )}
    </div>
  );
}
