import { useEffect, useRef } from 'react'
import { AlertTriangle } from 'lucide-react'

interface ConfirmModalProps {
  open: boolean
  title: string
  message: string
  confirmLabel?: string
  confirmVariant?: 'danger' | 'primary'
  onConfirm: () => void
  onCancel: () => void
}

export default function ConfirmModal({
  open,
  title,
  message,
  confirmLabel = 'Delete',
  confirmVariant = 'danger',
  onConfirm,
  onCancel,
}: ConfirmModalProps) {
  const cancelRef = useRef<HTMLButtonElement>(null)
  const dialogRef = useRef<HTMLDivElement>(null)

  useEffect(() => {
    if (!open) return
    // Focus cancel button when modal opens
    cancelRef.current?.focus()

    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key === 'Escape') {
        onCancel()
        return
      }
      // Trap focus inside the modal
      if (e.key === 'Tab' && dialogRef.current) {
        const focusable = dialogRef.current.querySelectorAll<HTMLElement>(
          'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
        )
        const first = focusable[0]
        const last = focusable[focusable.length - 1]
        if (e.shiftKey) {
          if (document.activeElement === first) {
            e.preventDefault()
            last?.focus()
          }
        } else {
          if (document.activeElement === last) {
            e.preventDefault()
            first?.focus()
          }
        }
      }
    }

    document.addEventListener('keydown', handleKeyDown)
    return () => document.removeEventListener('keydown', handleKeyDown)
  }, [open, onCancel])

  if (!open) return null

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50">
      <div
        ref={dialogRef}
        role="dialog"
        aria-modal="true"
        aria-labelledby="confirm-modal-title"
        className="rounded-xl shadow-2xl w-full max-w-sm mx-4 border"
        style={{
          backgroundColor: 'var(--color-bg-surface)',
          borderColor: 'var(--color-border-default)',
        }}
      >
        <div className="px-6 py-5">
          <div className="flex items-start gap-3 mb-4">
            <div className="shrink-0 w-9 h-9 rounded-full bg-red-100 flex items-center justify-center">
              <AlertTriangle size={18} className="text-red-600" />
            </div>
            <div>
              <h2
                id="confirm-modal-title"
                className="text-base font-semibold text-content"
              >
                {title}
              </h2>
              <p className="text-sm text-content mt-1" style={{ opacity: 0.7 }}>
                {message}
              </p>
            </div>
          </div>

          <div className="flex justify-end gap-3 mt-6">
            <button
              ref={cancelRef}
              onClick={onCancel}
              className="px-4 py-2 text-sm rounded-lg border transition-colors text-content-secondary hover:bg-surface-hover"
              style={{ borderColor: 'var(--color-border-default)' }}
            >
              Cancel
            </button>
            <button
              onClick={onConfirm}
              className={`px-4 py-2 text-sm rounded-lg font-medium transition-colors ${
                confirmVariant === 'danger'
                  ? 'bg-red-600 hover:bg-red-700 text-white'
                  : 'bg-accent hover:bg-accent text-white'
              }`}
            >
              {confirmLabel}
            </button>
          </div>
        </div>
      </div>
    </div>
  )
}