import type { Directive } from 'vue'

interface ActivatePoint {
  id: number
  x: number
  y: number
  progress: number
}

type NeuralCardElement = HTMLElement & {
  _neuralAnimationId?: number | null
}

const vNeuralCard: Directive = {
  mounted(el: HTMLElement) {
    const neuralEl = el as NeuralCardElement
    const points: ActivatePoint[] = []
    let pointId = 0
    let animationId: number | null = null
    let isHovering = false

    const createActivatePoint = () => {
      const rect = el.getBoundingClientRect()
      const edge = Math.floor(Math.random() * 4)
      let x: number, y: number

      switch (edge) {
        case 0:
          x = rect.left + Math.random() * rect.width
          y = rect.top
          break
        case 1:
          x = rect.right
          y = rect.top + Math.random() * rect.height
          break
        case 2:
          x = rect.left + Math.random() * rect.width
          y = rect.bottom
          break
        default:
          x = rect.left
          y = rect.top + Math.random() * rect.height
      }

      points.push({
        id: pointId++,
        x,
        y,
        progress: 0
      })

      updateCSS()
    }

    const updateCSS = () => {
      if (points.length === 0) {
        el.style.setProperty('--neural-points', '')
        return
      }

      const pointData = points
        .map(p => `${p.x},${p.y},${p.progress}`)
        .join('|')
      el.style.setProperty('--neural-points', pointData)
      el.style.setProperty('--neural-count', String(points.length))
    }

    const animate = () => {
      points.forEach(p => {
        p.progress += 0.02
      })

      const activePoints = points.filter(p => p.progress < 1)
      points.length = 0
      points.push(...activePoints)

      updateCSS()

      if (isHovering && points.length < 6) {
        if (Math.random() > 0.7) {
          createActivatePoint()
        }
      }

      animationId = requestAnimationFrame(animate)
    }

    const handleMouseEnter = () => {
      isHovering = true
      el.classList.add('neural-active')
      el.classList.add('neural-card-active')
    }

    const handleMouseLeave = () => {
      isHovering = false
      el.classList.remove('neural-active')
      el.classList.remove('neural-card-active')
    }

    const handleMouseMove = (e: MouseEvent) => {
      const rect = el.getBoundingClientRect()
      const mouseX = ((e.clientX - rect.left) / rect.width) * 100
      const mouseY = ((e.clientY - rect.top) / rect.height) * 100
      
      el.style.setProperty('--mouse-x', `${mouseX}%`)
      el.style.setProperty('--mouse-y', `${mouseY}%`)
    }

    el.addEventListener('mouseenter', handleMouseEnter)
    el.addEventListener('mouseleave', handleMouseLeave)
    el.addEventListener('mousemove', handleMouseMove)

    animate()

    neuralEl._neuralAnimationId = animationId
  },

  unmounted(el: HTMLElement) {
    const neuralEl = el as NeuralCardElement
    if (neuralEl._neuralAnimationId) {
      cancelAnimationFrame(neuralEl._neuralAnimationId)
    }
  }
}

export default vNeuralCard