Momento/memento-note/components/brainstorm/ghost-cursor.tsx

'use client'

import React, { useEffect, useState, useRef } from 'react'
import { motion, AnimatePresence } from 'motion/react'

interface GhostCursorProps {
  isActive: boolean
  containerRef: React.RefObject<HTMLDivElement | null>
  targetId?: string | null
}

export function GhostCursor({ isActive, containerRef, targetId }: GhostCursorProps) {
  const [position, setPosition] = useState({ x: 0, y: 0 })
  const [visible, setVisible] = useState(false)
  const intervalRef = useRef<NodeJS.Timeout | null>(null)

  useEffect(() => {
    if (!isActive) {
      setVisible(false)
      if (intervalRef.current) clearInterval(intervalRef.current)
      return
    }

    const container = containerRef.current
    if (!container) return

    setVisible(true)
    
    // Initialisation sécurisée
    const initialRect = container.getBoundingClientRect()
    const initialCx = initialRect.width > 0 ? initialRect.width / 2 : window.innerWidth / 2
    const initialCy = initialRect.height > 0 ? initialRect.height / 2 : window.innerHeight / 2

    setPosition({
      x: initialCx + (Math.random() - 0.5) * 200,
      y: initialCy + (Math.random() - 0.5) * 200,
    })

    let angle = Math.random() * Math.PI * 2
    let targetX = initialCx + Math.cos(angle) * 250
    let targetY = initialCy + Math.sin(angle) * 250

    intervalRef.current = setInterval(() => {
      // Recalculer les dimensions à chaque tick pour s'adapter aux redimensionnements
      const currentContainer = containerRef.current
      if (!currentContainer) return

      const containerRect = currentContainer.getBoundingClientRect()
      const cx = containerRect.width / 2
      const cy = containerRect.height / 2

      let currentTargetX = targetX;
      let currentTargetY = targetY;

      if (targetId) {
        const nodeElement = document.querySelector(`[data-id="${targetId}"]`);
        if (nodeElement) {
          const nodeRect = nodeElement.getBoundingClientRect();
          currentTargetX = nodeRect.left - containerRect.left + nodeRect.width / 2;
          currentTargetY = nodeRect.top - containerRect.top + nodeRect.height / 2;
        }
      }

      setPosition(prev => {
        const dx = currentTargetX - prev.x
        const dy = currentTargetY - prev.y
        const dist = Math.sqrt(dx * dx + dy * dy)

        if (!targetId && dist < 20) {
          angle = Math.random() * Math.PI * 2
          const radius = 150 + Math.random() * 200
          targetX = cx + Math.cos(angle) * radius
          targetY = cy + Math.sin(angle) * radius
        }

        const speed = targetId ? 0.15 : 0.06;
        
        let newX = prev.x + dx * speed;
        let newY = prev.y + dy * speed;
        
        // Protection Anti-NaN qui bloquait le curseur en haut à gauche
        if (isNaN(newX)) newX = cx;
        if (isNaN(newY)) newY = cy;

        return {
          x: newX,
          y: newY,
        }
      })
    }, 50)

    return () => {
      if (intervalRef.current) clearInterval(intervalRef.current)
    }
  }, [isActive, containerRef, targetId])

  return (
    <AnimatePresence>
      {visible && (
        <motion.div
          initial={{ opacity: 0, scale: 0.5 }}
          animate={{ opacity: 1, scale: 1 }}
          exit={{ opacity: 0, scale: 0.5 }}
          className="absolute pointer-events-none z-50"
          style={{ transform: `translate(${position.x}px, ${position.y}px)` }}
        >
          <div className="relative">
            <svg width="16" height="16" viewBox="0 0 16 16" fill="none">
              <path d="M0 0L16 6L8 8L6 16L0 0Z" fill="#a78bfa" />
            </svg>
            <div className="absolute -top-1 -right-1 w-3 h-3">
              <span className="absolute inline-flex h-full w-full animate-ping rounded-full bg-violet-400 opacity-50" />
              <span className="relative inline-flex rounded-full h-3 w-3 bg-violet-500" />
            </div>
            <div className="mt-3 ml-3 px-2 py-0.5 rounded-full text-[10px] font-bold text-white whitespace-nowrap shadow-lg bg-gradient-to-r from-violet-500 to-purple-600">
              AI ✦
            </div>
          </div>
        </motion.div>
      )}
    </AnimatePresence>
  )
}