import { useEffect } from 'react'

/**
 * Custom hook that intercepts all copy operations and forces them to copy plain text only (no formatting).
 *
 * This hook automatically enables plain text copying for the entire application when called.
 *
 * @example
 * ```tsx
 * function App() {
 *   // Enable plain text copying for the entire app
 *   useCopyAsPlainText()
 *
 *   return <div>Your app content</div>
 * }
 * ```
 */
export const useCopyAsPlainText = (): void => {
  useEffect(() => {
    const handleCopy = async (event: ClipboardEvent) => {
      // Get the current selection
      const selection = window.getSelection()

      if (!selection || selection.rangeCount === 0) {
        // No selection, let default behavior happen
        return
      }

      // Get the selected text as plain text
      const plainText = selection.toString()

      if (!plainText) {
        // No text selected, let default behavior happen
        return
      }

      // Prevent the default copy behavior
      event.preventDefault()

      try {
        // Check if Clipboard API is available (modern browsers)
        if (navigator.clipboard && navigator.clipboard.writeText) {
          await navigator.clipboard.writeText(plainText)
        } else {
          // Fallback for older browsers using the deprecated method
          // Create a temporary textarea element
          const textarea = document.createElement('textarea')
          textarea.value = plainText
          textarea.style.position = 'fixed'
          textarea.style.left = '-9999px'
          textarea.style.top = '-9999px'
          document.body.appendChild(textarea)
          textarea.focus()
          textarea.select()

          try {
            document.execCommand('copy')
          } finally {
            document.body.removeChild(textarea)
          }
        }
      } catch {
        // Silently fall back to default behavior
      }
    }

    // Add the event listener to the document
    document.addEventListener('copy', handleCopy)

    // Cleanup function to remove the event listener
    return () => {
      document.removeEventListener('copy', handleCopy)
    }
  }, [])
}

export default useCopyAsPlainText