'use client';

import { useState, useRef, useEffect } from 'react';
import { Card } from '@/components/ui/Card';
import { TagInput } from '@/components/ui/TagInput';
import { TaskStatus, TaskPriority } from '@/lib/types';
import { CreateTaskData } from '@/clients/tasks-client';
import { getAllPriorities } from '@/lib/status-config';

interface QuickAddTaskProps {
  status: TaskStatus;
  onSubmit: (data: CreateTaskData) => Promise<void>;
  onCancel: () => void;
  // Contexte pour les swimlanes
  swimlaneContext?: {
    type: 'tag' | 'priority';
    value: string; // nom du tag ou clé de la priorité
  };
}

export function QuickAddTask({ status, onSubmit, onCancel, swimlaneContext }: QuickAddTaskProps) {
  // Fonction pour initialiser les données selon le contexte
  const getInitialFormData = (): CreateTaskData => {
    const baseData: CreateTaskData = {
      title: '',
      description: '',
      status,
      priority: 'medium' as TaskPriority,
      tags: [],
      dueDate: undefined
    };

    // Pré-remplir selon le contexte de swimlane
    if (swimlaneContext) {
      if (swimlaneContext.type === 'tag' && swimlaneContext.value !== 'Sans tag') {
        baseData.tags = [swimlaneContext.value];
      } else if (swimlaneContext.type === 'priority') {
        baseData.priority = swimlaneContext.value as TaskPriority;
      }
    }

    return baseData;
  };

  const [formData, setFormData] = useState<CreateTaskData>(getInitialFormData());
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [activeField, setActiveField] = useState<'title' | 'description' | 'tags' | 'date' | null>('title');
  const titleRef = useRef<HTMLInputElement>(null);

  // Focus automatique sur le titre
  useEffect(() => {
    titleRef.current?.focus();
  }, []);

  const handleSubmit = async () => {
    const trimmedTitle = formData.title.trim();
    console.log('handleSubmit called:', { trimmedTitle, isSubmitting });
    if (!trimmedTitle || isSubmitting) return;

    setIsSubmitting(true);
    try {
      console.log('Submitting task:', { ...formData, title: trimmedTitle });
      await onSubmit({
        ...formData,
        title: trimmedTitle
      });
      
      // Réinitialiser pour la prochaine tâche (en gardant le contexte)
      setFormData(getInitialFormData());
      setActiveField('title');
      setIsSubmitting(false);
      titleRef.current?.focus();
    } catch (error) {
      console.error('Erreur lors de la création:', error);
      setIsSubmitting(false);
    }
  };

  const handleKeyDown = (e: React.KeyboardEvent, field: string) => {
    console.log('Key pressed:', e.key, 'field:', field, 'title:', formData.title);
    
    // Seulement intercepter les touches spécifiques qu'on veut gérer
    if (e.key === 'Enter') {
      e.preventDefault();
      e.stopPropagation();
      if (field === 'title' && formData.title.trim()) {
        console.log('Calling handleSubmit from title');
        handleSubmit();
      } else if (field === 'tags') {
        // TagInput gère ses propres événements Enter
      } else if (formData.title.trim()) {
        // Permettre création depuis n'importe quel champ si titre rempli
        console.log('Calling handleSubmit from other field');
        handleSubmit();
      }
    } else if (e.key === 'Escape') {
      e.preventDefault();
      onCancel();
    } else if (e.key === 'Tab' && !e.metaKey && !e.ctrlKey) {
      // Navigation entre les champs seulement si pas de modificateur
      e.preventDefault();
      const fields = ['title', 'description', 'tags', 'date'];
      const currentIndex = fields.indexOf(activeField || 'title');
      const nextField = fields[(currentIndex + 1) % fields.length] as typeof activeField;
      setActiveField(nextField);
    }
    // Laisser passer tous les autres événements (y compris les raccourcis système)
  };

  const handleTagsChange = (tags: string[]) => {
    setFormData(prev => ({
      ...prev,
      tags
    }));
  };

  const handleBlur = (e: React.FocusEvent) => {
    // Vérifier si le focus reste dans le composant
    setTimeout(() => {
      const currentTarget = e.currentTarget;
      const relatedTarget = e.relatedTarget as Node | null;
      
      // Si le focus sort complètement du composant ET qu'il n'y a pas de titre
      if (currentTarget && (!relatedTarget || !currentTarget.contains(relatedTarget)) && !formData.title.trim()) {
        onCancel();
      }
    }, 100);
  };

  return (
    <div onBlur={handleBlur}>
      <Card className="p-3 border-dashed border-[var(--primary)]/30 bg-[var(--card)]/50 hover:border-[var(--primary)]/50 transition-all duration-300">
      {/* Header avec titre et priorité */}
      <div className="flex items-start gap-2 mb-2">
        <input
          ref={titleRef}
          type="text"
          value={formData.title}
          onChange={(e) => setFormData(prev => ({ ...prev, title: e.target.value }))}
          onKeyDown={(e) => handleKeyDown(e, 'title')}
          onFocus={() => setActiveField('title')}
          placeholder="Titre de la tâche..."
          disabled={isSubmitting}
          className="flex-1 bg-transparent border-none outline-none text-[var(--foreground)] font-mono text-sm font-medium placeholder-[var(--muted-foreground)] leading-tight"
        />
        
        {/* Indicateur de priorité */}
        <select
          value={formData.priority}
          onChange={(e) => setFormData(prev => ({ ...prev, priority: e.target.value as TaskPriority }))}
          disabled={isSubmitting}
          className="bg-transparent border-none outline-none text-xs font-mono text-[var(--muted-foreground)]"
        >
          {getAllPriorities().map(priorityConfig => (
            <option key={priorityConfig.key} value={priorityConfig.key}>
              {priorityConfig.icon} {priorityConfig.label}
            </option>
          ))}
        </select>
      </div>

      {/* Description */}
      <textarea
        value={formData.description}
        onChange={(e) => setFormData(prev => ({ ...prev, description: e.target.value }))}
        onKeyDown={(e) => handleKeyDown(e, 'description')}
        onFocus={() => setActiveField('description')}
        placeholder="Description..."
        rows={2}
        disabled={isSubmitting}
        className="w-full bg-transparent border-none outline-none text-xs text-[var(--muted-foreground)] font-mono placeholder-[var(--muted-foreground)] resize-none mb-2"
      />

      {/* Tags */}
      <div className="mb-2">
        <TagInput
          tags={formData.tags || []}
          onChange={handleTagsChange}
          placeholder="Tags..."
          maxTags={5}
          className="text-xs"
        />
      </div>

      {/* Footer avec date et actions */}
      <div className="pt-2 border-t border-[var(--border)]/50">
        <div className="flex items-center justify-between text-xs min-w-0">
          <input
            type="datetime-local"
            value={formData.dueDate ? new Date(formData.dueDate.getTime() - formData.dueDate.getTimezoneOffset() * 60000).toISOString().slice(0, 16) : ''}
            onChange={(e) => setFormData(prev => ({ 
              ...prev, 
              dueDate: e.target.value ? new Date(e.target.value) : undefined 
            }))}
            onFocus={() => setActiveField('date')}
            disabled={isSubmitting}
            className="bg-transparent border-none outline-none text-[var(--muted-foreground)] font-mono text-xs flex-shrink min-w-0"
          />
          
          {isSubmitting && (
            <div className="flex items-center gap-1 text-[var(--primary)] font-mono text-xs flex-shrink-0">
              <div className="w-3 h-3 border border-[var(--primary)] border-t-transparent rounded-full animate-spin"></div>
              <span>...</span>
            </div>
          )}
        </div>
      </div>
    </Card>
    </div>
  );
}