Overleaf/libraries/ai/components/ai-elements/prompt-input.tsx

'use client'

import { Button } from '../ui/button'
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from '../ui/dropdown-menu'
import { HoverCard, HoverCardContent, HoverCardTrigger } from '../ui/hover-card'
import {
  InputGroup,
  InputGroupAddon,
  InputGroupButton,
  InputGroupTextarea,
} from '../ui/input-group'
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '../ui/select'
import { cn } from '../../utils'
import type { ChatStatus, FileUIPart } from 'ai'
import {
  ImageIcon,
  Loader2Icon,
  MicIcon,
  PaperclipIcon,
  PlusIcon,
  SendIcon,
  SquareIcon,
  XIcon,
} from 'lucide-react'
import { nanoid } from 'nanoid'
import {
  type ChangeEvent,
  type ChangeEventHandler,
  Children,
  type ClipboardEventHandler,
  type ComponentProps,
  createContext,
  type FormEvent,
  type FormEventHandler,
  Fragment,
  type HTMLAttributes,
  type KeyboardEventHandler,
  type PropsWithChildren,
  type ReactNode,
  type RefObject,
  useCallback,
  useContext,
  useEffect,
  useMemo,
  useRef,
  useState,
} from 'react'
// ============================================================================
// Provider Context & Types
// ============================================================================

export type AttachmentsContext = {
  files: (FileUIPart & { id: string })[]
  add: (files: File[] | FileList) => void
  remove: (id: string) => void
  clear: () => void
  openFileDialog: () => void
  fileInputRef: RefObject<HTMLInputElement | null>
}

export type TextInputContext = {
  value: string
  setInput: (v: string) => void
  clear: () => void
}

export type PromptInputControllerProps = {
  textInput: TextInputContext
  attachments: AttachmentsContext
  /** INTERNAL: Allows PromptInput to register its file textInput + "open" callback */
  __registerFileInput: (
    ref: RefObject<HTMLInputElement | null>,
    open: () => void
  ) => void
}

const PromptInputController = createContext<PromptInputControllerProps | null>(
  null
)
const ProviderAttachmentsContext = createContext<AttachmentsContext | null>(
  null
)

export const usePromptInputController = () => {
  const ctx = useContext(PromptInputController)
  if (!ctx) {
    throw new Error(
      'Wrap your component inside <PromptInputProvider> to use usePromptInputController().'
    )
  }
  return ctx
}

// Optional variants (do NOT throw). Useful for dual-mode components.
const useOptionalPromptInputController = () => useContext(PromptInputController)

export const useProviderAttachments = () => {
  const ctx = useContext(ProviderAttachmentsContext)
  if (!ctx) {
    throw new Error(
      'Wrap your component inside <PromptInputProvider> to use useProviderAttachments().'
    )
  }
  return ctx
}

const useOptionalProviderAttachments = () =>
  useContext(ProviderAttachmentsContext)

export type PromptInputProviderProps = PropsWithChildren<{
  initialInput?: string
}>

/**
 * Optional global provider that lifts PromptInput state outside of PromptInput.
 * If you don't use it, PromptInput stays fully self-managed.
 */
export function PromptInputProvider({
  initialInput: initialTextInput = '',
  children,
}: PromptInputProviderProps) {
  // ----- textInput state
  const [textInput, setTextInput] = useState(initialTextInput)
  const clearInput = useCallback(() => setTextInput(''), [])

  // ----- attachments state (global when wrapped)
  const [attachements, setAttachements] = useState<
    (FileUIPart & { id: string })[]
  >([])
  const fileInputRef = useRef<HTMLInputElement | null>(null)
  const openRef = useRef<() => void>(() => {})

  const add = useCallback((files: File[] | FileList) => {
    const incoming = Array.from(files)
    if (incoming.length === 0) return

    setAttachements(prev =>
      prev.concat(
        incoming.map(file => ({
          id: nanoid(),
          type: 'file' as const,
          url: URL.createObjectURL(file),
          mediaType: file.type,
          filename: file.name,
        }))
      )
    )
  }, [])

  const remove = useCallback((id: string) => {
    setAttachements(prev => {
      const found = prev.find(f => f.id === id)
      if (found?.url) URL.revokeObjectURL(found.url)
      return prev.filter(f => f.id !== id)
    })
  }, [])

  const clear = useCallback(() => {
    setAttachements(prev => {
      for (const f of prev) if (f.url) URL.revokeObjectURL(f.url)
      return []
    })
  }, [])

  const openFileDialog = useCallback(() => {
    openRef.current?.()
  }, [])

  const attachments = useMemo<AttachmentsContext>(
    () => ({
      files: attachements,
      add,
      remove,
      clear,
      openFileDialog,
      fileInputRef,
    }),
    [attachements, add, remove, clear, openFileDialog]
  )

  const __registerFileInput = useCallback(
    (ref: RefObject<HTMLInputElement | null>, open: () => void) => {
      fileInputRef.current = ref.current
      openRef.current = open
    },
    []
  )

  const controller = useMemo<PromptInputControllerProps>(
    () => ({
      textInput: {
        value: textInput,
        setInput: setTextInput,
        clear: clearInput,
      },
      attachments,
      __registerFileInput,
    }),
    [textInput, clearInput, attachments, __registerFileInput]
  )

  return (
    <PromptInputController.Provider value={controller}>
      <ProviderAttachmentsContext.Provider value={attachments}>
        {children}
      </ProviderAttachmentsContext.Provider>
    </PromptInputController.Provider>
  )
}

// ============================================================================
// Component Context & Hooks
// ============================================================================

const LocalAttachmentsContext = createContext<AttachmentsContext | null>(null)

export const usePromptInputAttachments = () => {
  // Dual-mode: prefer provider if present, otherwise use local
  const provider = useOptionalProviderAttachments()
  const local = useContext(LocalAttachmentsContext)
  const context = provider ?? local
  if (!context) {
    throw new Error(
      'usePromptInputAttachments must be used within a PromptInput or PromptInputProvider'
    )
  }
  return context
}

export type PromptInputAttachmentProps = HTMLAttributes<HTMLDivElement> & {
  data: FileUIPart & { id: string }
  className?: string
}

export function PromptInputAttachment({
  data,
  className,
  ...props
}: PromptInputAttachmentProps) {
  const attachments = usePromptInputAttachments()

  const filename = data.filename || ''

  const mediaType =
    data.mediaType?.startsWith('image/') && data.url ? 'image' : 'file'
  const isImage = mediaType === 'image'

  const attachmentLabel = filename || (isImage ? 'Image' : 'Attachment')

  return (
    <PromptInputHoverCard>
      <HoverCardTrigger asChild>
        <div
          className={cn(
            'group relative flex h-8 cursor-default select-none items-center gap-1.5 rounded-md border border-border px-1.5 font-medium text-sm transition-all hover:bg-accent hover:text-accent-foreground dark:hover:bg-accent/50',
            className
          )}
          key={data.id}
          {...props}
        >
          <div className="relative size-5 shrink-0">
            <div className="absolute inset-0 flex size-5 items-center justify-center overflow-hidden rounded bg-background transition-opacity group-hover:opacity-0">
              {isImage ? (
                <img
                  alt={filename || 'attachment'}
                  className="size-5 object-cover"
                  height={20}
                  src={data.url}
                  width={20}
                />
              ) : (
                <div className="flex size-5 items-center justify-center text-muted-foreground">
                  <PaperclipIcon className="size-3" />
                </div>
              )}
            </div>
            <Button
              aria-label="Remove attachment"
              className="absolute inset-0 size-5 cursor-pointer rounded p-0 opacity-0 transition-opacity group-hover:pointer-events-auto group-hover:opacity-100 [&>svg]:size-2.5"
              onClick={e => {
                e.stopPropagation()
                attachments.remove(data.id)
              }}
              type="button"
              variant="ghost"
            >
              <XIcon />
              <span className="sr-only">Remove</span>
            </Button>
          </div>

          <span className="flex-1 truncate">{attachmentLabel}</span>
        </div>
      </HoverCardTrigger>
      <PromptInputHoverCardContent className="w-auto p-2">
        <div className="w-auto space-y-3">
          {isImage && (
            <div className="flex max-h-96 w-96 items-center justify-center overflow-hidden rounded-md border">
              <img
                alt={filename || 'attachment preview'}
                className="max-h-full max-w-full object-contain"
                height={384}
                src={data.url}
                width={448}
              />
            </div>
          )}
          <div className="flex items-center gap-2.5">
            <div className="min-w-0 flex-1 space-y-1 px-0.5">
              <h4 className="truncate font-semibold text-sm leading-none">
                {filename || (isImage ? 'Image' : 'Attachment')}
              </h4>
              {data.mediaType && (
                <p className="truncate font-mono text-muted-foreground text-xs">
                  {data.mediaType}
                </p>
              )}
            </div>
          </div>
        </div>
      </PromptInputHoverCardContent>
    </PromptInputHoverCard>
  )
}

export type PromptInputAttachmentsProps = Omit<
  HTMLAttributes<HTMLDivElement>,
  'children'
> & {
  children: (attachment: FileUIPart & { id: string }) => ReactNode
}

export function PromptInputAttachments({
  children,
}: PromptInputAttachmentsProps) {
  const attachments = usePromptInputAttachments()

  if (!attachments.files.length) {
    return null
  }

  return attachments.files.map(file => (
    <Fragment key={file.id}>{children(file)}</Fragment>
  ))
}

export type PromptInputActionAddAttachmentsProps = ComponentProps<
  typeof DropdownMenuItem
> & {
  label?: string
}

export const PromptInputActionAddAttachments = ({
  label = 'Add photos or files',
  ...props
}: PromptInputActionAddAttachmentsProps) => {
  const attachments = usePromptInputAttachments()

  return (
    <DropdownMenuItem
      {...props}
      onSelect={e => {
        e.preventDefault()
        attachments.openFileDialog()
      }}
    >
      <ImageIcon className="mr-2 size-4" /> {label}
    </DropdownMenuItem>
  )
}

export type PromptInputMessage = {
  text?: string
  files?: FileUIPart[]
}

export type PromptInputProps = Omit<
  HTMLAttributes<HTMLFormElement>,
  'onSubmit' | 'onError'
> & {
  accept?: string // e.g., "image/*" or leave undefined for any
  multiple?: boolean
  // When true, accepts drops anywhere on document. Default false (opt-in).
  globalDrop?: boolean
  // Render a hidden input with given name and keep it in sync for native form posts. Default false.
  syncHiddenInput?: boolean
  // Minimal constraints
  maxFiles?: number
  maxFileSize?: number // bytes
  onError?: (err: {
    code: 'max_files' | 'max_file_size' | 'accept'
    message: string
  }) => void
  onSubmit: (
    message: PromptInputMessage,
    event: FormEvent<HTMLFormElement>
  ) => void | Promise<void>
}

export const PromptInput = ({
  className,
  accept,
  multiple,
  globalDrop,
  syncHiddenInput,
  maxFiles,
  maxFileSize,
  onError,
  onSubmit,
  children,
  ...props
}: PromptInputProps) => {
  // Try to use a provider controller if present
  const controller = useOptionalPromptInputController()
  const usingProvider = !!controller

  // Refs
  const inputRef = useRef<HTMLInputElement | null>(null)
  const anchorRef = useRef<HTMLSpanElement>(null)
  const formRef = useRef<HTMLFormElement | null>(null)

  // Find nearest form to scope drag & drop
  useEffect(() => {
    const root = anchorRef.current?.closest('form')
    if (root instanceof HTMLFormElement) {
      formRef.current = root
    }
  }, [])

  // ----- Local attachments (only used when no provider)
  const [items, setItems] = useState<(FileUIPart & { id: string })[]>([])
  const files = usingProvider ? controller.attachments.files : items

  const openFileDialogLocal = useCallback(() => {
    inputRef.current?.click()
  }, [])

  const matchesAccept = useCallback(
    (f: File) => {
      if (!accept || accept.trim() === '') {
        return true
      }
      if (accept.includes('image/*')) {
        return f.type.startsWith('image/')
      }
      // NOTE: keep simple; expand as needed
      return true
    },
    [accept]
  )

  const addLocal = useCallback(
    (fileList: File[] | FileList) => {
      const incoming = Array.from(fileList)
      const accepted = incoming.filter(f => matchesAccept(f))
      if (incoming.length && accepted.length === 0) {
        onError?.({
          code: 'accept',
          message: 'No files match the accepted types.',
        })
        return
      }
      const withinSize = (f: File) =>
        maxFileSize ? f.size <= maxFileSize : true
      const sized = accepted.filter(withinSize)
      if (accepted.length > 0 && sized.length === 0) {
        onError?.({
          code: 'max_file_size',
          message: 'All files exceed the maximum size.',
        })
        return
      }

      setItems(prev => {
        const capacity =
          typeof maxFiles === 'number'
            ? Math.max(0, maxFiles - prev.length)
            : undefined
        const capped =
          typeof capacity === 'number' ? sized.slice(0, capacity) : sized
        if (typeof capacity === 'number' && sized.length > capacity) {
          onError?.({
            code: 'max_files',
            message: 'Too many files. Some were not added.',
          })
        }
        const next: (FileUIPart & { id: string })[] = []
        for (const file of capped) {
          next.push({
            id: nanoid(),
            type: 'file',
            url: URL.createObjectURL(file),
            mediaType: file.type,
            filename: file.name,
          })
        }
        return prev.concat(next)
      })
    },
    [matchesAccept, maxFiles, maxFileSize, onError]
  )

  const add = usingProvider
    ? (files: File[] | FileList) => controller.attachments.add(files)
    : addLocal

  const remove = usingProvider
    ? (id: string) => controller.attachments.remove(id)
    : (id: string) =>
        setItems(prev => {
          const found = prev.find(file => file.id === id)
          if (found?.url) {
            URL.revokeObjectURL(found.url)
          }
          return prev.filter(file => file.id !== id)
        })

  const clear = usingProvider
    ? () => controller.attachments.clear()
    : () =>
        setItems(prev => {
          for (const file of prev) {
            if (file.url) {
              URL.revokeObjectURL(file.url)
            }
          }
          return []
        })

  const openFileDialog = usingProvider
    ? () => controller.attachments.openFileDialog()
    : openFileDialogLocal

  // Let provider know about our hidden file input so external menus can call openFileDialog()
  useEffect(() => {
    if (!usingProvider) return
    controller.__registerFileInput(inputRef, () => inputRef.current?.click())
  }, [usingProvider, controller])

  // Note: File input cannot be programmatically set for security reasons
  // The syncHiddenInput prop is no longer functional
  useEffect(() => {
    if (syncHiddenInput && inputRef.current && files.length === 0) {
      inputRef.current.value = ''
    }
  }, [files, syncHiddenInput])

  // Attach drop handlers on nearest form and document (opt-in)
  useEffect(() => {
    const form = formRef.current
    if (!form) return

    const onDragOver = (e: DragEvent) => {
      if (e.dataTransfer?.types?.includes('Files')) {
        e.preventDefault()
      }
    }
    const onDrop = (e: DragEvent) => {
      if (e.dataTransfer?.types?.includes('Files')) {
        e.preventDefault()
      }
      if (e.dataTransfer?.files && e.dataTransfer.files.length > 0) {
        add(e.dataTransfer.files)
      }
    }
    form.addEventListener('dragover', onDragOver)
    form.addEventListener('drop', onDrop)
    return () => {
      form.removeEventListener('dragover', onDragOver)
      form.removeEventListener('drop', onDrop)
    }
  }, [add])

  useEffect(() => {
    if (!globalDrop) return

    const onDragOver = (e: DragEvent) => {
      if (e.dataTransfer?.types?.includes('Files')) {
        e.preventDefault()
      }
    }
    const onDrop = (e: DragEvent) => {
      if (e.dataTransfer?.types?.includes('Files')) {
        e.preventDefault()
      }
      if (e.dataTransfer?.files && e.dataTransfer.files.length > 0) {
        add(e.dataTransfer.files)
      }
    }
    document.addEventListener('dragover', onDragOver)
    document.addEventListener('drop', onDrop)
    return () => {
      document.removeEventListener('dragover', onDragOver)
      document.removeEventListener('drop', onDrop)
    }
  }, [add, globalDrop])

  useEffect(
    () => () => {
      if (!usingProvider) {
        for (const f of files) {
          if (f.url) URL.revokeObjectURL(f.url)
        }
      }
    },
    [usingProvider, files]
  )

  const handleChange: ChangeEventHandler<HTMLInputElement> = event => {
    if (event.currentTarget.files) {
      add(event.currentTarget.files)
    }
  }

  const convertBlobUrlToDataUrl = async (url: string): Promise<string> => {
    const response = await fetch(url)
    const blob = await response.blob()
    return await new Promise((resolve, reject) => {
      const reader = new FileReader()
      reader.onloadend = () => resolve(reader.result as string)
      reader.onerror = reject
      reader.readAsDataURL(blob)
    })
  }

  const ctx = useMemo<AttachmentsContext>(
    () => ({
      files: files.map(item => ({ ...item, id: item.id })),
      add,
      remove,
      clear,
      openFileDialog,
      fileInputRef: inputRef,
    }),
    [files, add, remove, clear, openFileDialog]
  )

  const handleSubmit: FormEventHandler<HTMLFormElement> = event => {
    event.preventDefault()

    const form = event.currentTarget
    const text = usingProvider
      ? controller.textInput.value
      : (() => {
          const formData = new FormData(form)
          return (formData.get('message') as string) || ''
        })()

    // Reset form immediately after capturing text to avoid race condition
    // where user input during async blob conversion would be lost
    if (!usingProvider) {
      form.reset()
    }

    // Convert blob URLs to data URLs asynchronously
    Promise.all(
      files.map(async ({ id, ...item }) => {
        if (item.url && item.url.startsWith('blob:')) {
          return {
            ...item,
            url: await convertBlobUrlToDataUrl(item.url),
          }
        }
        return item
      })
    ).then((convertedFiles: FileUIPart[]) => {
      try {
        const result = onSubmit({ text, files: convertedFiles }, event)

        // Handle both sync and async onSubmit
        if (result instanceof Promise) {
          result
            .then(() => {
              clear()
              if (usingProvider) {
                controller.textInput.clear()
              }
            })
            .catch(() => {
              // Don't clear on error - user may want to retry
            })
        } else {
          // Sync function completed without throwing, clear attachments
          clear()
          if (usingProvider) {
            controller.textInput.clear()
          }
        }
      } catch (error) {
        // Don't clear on error - user may want to retry
      }
    })
  }

  // Render with or without local provider
  const inner = (
    <>
      <span aria-hidden="true" className="hidden" ref={anchorRef} />
      <input
        accept={accept}
        aria-label="Upload files"
        className="hidden"
        multiple={multiple}
        onChange={handleChange}
        ref={inputRef}
        title="Upload files"
        type="file"
      />
      <form
        className={cn('w-full', className)}
        onSubmit={handleSubmit}
        {...props}
      >
        <InputGroup>{children}</InputGroup>
      </form>
    </>
  )

  return usingProvider ? (
    inner
  ) : (
    <LocalAttachmentsContext.Provider value={ctx}>
      {inner}
    </LocalAttachmentsContext.Provider>
  )
}

export type PromptInputBodyProps = HTMLAttributes<HTMLDivElement>

export const PromptInputBody = ({
  className,
  ...props
}: PromptInputBodyProps) => (
  <div className={cn('contents', className)} {...props} />
)

export type PromptInputTextareaProps = ComponentProps<typeof InputGroupTextarea>

export const PromptInputTextarea = ({
  onChange,
  className,
  placeholder = 'What would you like to do?',
  ...props
}: PromptInputTextareaProps) => {
  const controller = useOptionalPromptInputController()
  const attachments = usePromptInputAttachments()
  const [isComposing, setIsComposing] = useState(false)

  const handleKeyDown: KeyboardEventHandler<HTMLTextAreaElement> = e => {
    if (e.key === 'Enter') {
      if (isComposing || e.nativeEvent.isComposing) {
        return
      }
      if (e.shiftKey) {
        return
      }
      e.preventDefault()
      e.currentTarget.form?.requestSubmit()
    }

    // Remove last attachment when Backspace is pressed and textarea is empty
    if (
      e.key === 'Backspace' &&
      e.currentTarget.value === '' &&
      attachments.files.length > 0
    ) {
      e.preventDefault()
      const lastAttachment = attachments.files.at(-1)
      if (lastAttachment) {
        attachments.remove(lastAttachment.id)
      }
    }
  }

  const handlePaste: ClipboardEventHandler<HTMLTextAreaElement> = event => {
    const items = event.clipboardData?.items

    if (!items) {
      return
    }

    const files: File[] = []

    for (const item of items) {
      if (item.kind === 'file') {
        const file = item.getAsFile()
        if (file) {
          files.push(file)
        }
      }
    }

    if (files.length > 0) {
      event.preventDefault()
      attachments.add(files)
    }
  }

  const controlledProps = controller
    ? {
        value: controller.textInput.value,
        onChange: (e: ChangeEvent<HTMLTextAreaElement>) => {
          controller.textInput.setInput(e.currentTarget.value)
          onChange?.(e)
        },
      }
    : {
        onChange,
      }

  return (
    <InputGroupTextarea
      className={cn('field-sizing-content max-h-48 min-h-16', className)}
      name="message"
      onCompositionEnd={() => setIsComposing(false)}
      onCompositionStart={() => setIsComposing(true)}
      onKeyDown={handleKeyDown}
      onPaste={handlePaste}
      placeholder={placeholder}
      {...props}
      {...controlledProps}
    />
  )
}

export type PromptInputHeaderProps = Omit<
  ComponentProps<typeof InputGroupAddon>,
  'align'
>

export const PromptInputHeader = ({
  className,
  ...props
}: PromptInputHeaderProps) => (
  <InputGroupAddon
    align="block-end"
    className={cn('order-first flex-wrap gap-1', className)}
    {...props}
  />
)

export type PromptInputFooterProps = Omit<
  ComponentProps<typeof InputGroupAddon>,
  'align'
>

export const PromptInputFooter = ({
  className,
  ...props
}: PromptInputFooterProps) => (
  <InputGroupAddon
    align="block-end"
    className={cn('justify-between gap-1', className)}
    {...props}
  />
)

export type PromptInputToolsProps = HTMLAttributes<HTMLDivElement>

export const PromptInputTools = ({
  className,
  ...props
}: PromptInputToolsProps) => (
  <div className={cn('flex items-center gap-1', className)} {...props} />
)

export type PromptInputButtonProps = ComponentProps<typeof InputGroupButton>

export const PromptInputButton = ({
  variant = 'ghost',
  className,
  size,
  ...props
}: PromptInputButtonProps) => {
  const newSize =
    size ?? (Children.count(props.children) > 1 ? 'sm' : 'icon-sm')

  return (
    <InputGroupButton
      className={cn(className)}
      size={newSize}
      type="button"
      variant={variant}
      {...props}
    />
  )
}

export type PromptInputActionMenuProps = ComponentProps<typeof DropdownMenu>
export const PromptInputActionMenu = (props: PromptInputActionMenuProps) => (
  <DropdownMenu {...props} />
)

export type PromptInputActionMenuTriggerProps = PromptInputButtonProps

export const PromptInputActionMenuTrigger = ({
  className,
  children,
  ...props
}: PromptInputActionMenuTriggerProps) => (
  <DropdownMenuTrigger asChild>
    <PromptInputButton className={className} {...props}>
      {children ?? <PlusIcon className="size-4" />}
    </PromptInputButton>
  </DropdownMenuTrigger>
)

export type PromptInputActionMenuContentProps = ComponentProps<
  typeof DropdownMenuContent
>
export const PromptInputActionMenuContent = ({
  className,
  ...props
}: PromptInputActionMenuContentProps) => (
  <DropdownMenuContent align="start" className={cn(className)} {...props} />
)

export type PromptInputActionMenuItemProps = ComponentProps<
  typeof DropdownMenuItem
>
export const PromptInputActionMenuItem = ({
  className,
  ...props
}: PromptInputActionMenuItemProps) => (
  <DropdownMenuItem className={cn(className)} {...props} />
)

// Note: Actions that perform side-effects (like opening a file dialog)
// are provided in opt-in modules (e.g., prompt-input-attachments).

export type PromptInputSubmitProps = ComponentProps<typeof InputGroupButton> & {
  status?: ChatStatus
}

export const PromptInputSubmit = ({
  className,
  variant = 'default',
  size = 'icon-sm',
  status,
  children,
  ...props
}: PromptInputSubmitProps) => {
  let Icon = <SendIcon className="size-4" />

  if (status === 'submitted') {
    Icon = <Loader2Icon className="size-4 animate-spin" />
  } else if (status === 'streaming') {
    Icon = <SquareIcon className="size-4" />
  } else if (status === 'error') {
    Icon = <XIcon className="size-4" />
  }

  return (
    <InputGroupButton
      aria-label="Submit"
      className={cn(className)}
      size={size}
      type="submit"
      variant={variant}
      {...props}
    >
      {children ?? Icon}
    </InputGroupButton>
  )
}

interface SpeechRecognition extends EventTarget {
  continuous: boolean
  interimResults: boolean
  lang: string
  start(): void
  stop(): void
  onstart: ((this: SpeechRecognition, ev: Event) => any) | null
  onend: ((this: SpeechRecognition, ev: Event) => any) | null
  onresult:
    | ((this: SpeechRecognition, ev: SpeechRecognitionEvent) => any)
    | null
  onerror:
    | ((this: SpeechRecognition, ev: SpeechRecognitionErrorEvent) => any)
    | null
}

interface SpeechRecognitionEvent extends Event {
  results: SpeechRecognitionResultList
}

type SpeechRecognitionResultList = {
  readonly length: number
  item(index: number): SpeechRecognitionResult
  [index: number]: SpeechRecognitionResult
}

type SpeechRecognitionResult = {
  readonly length: number
  item(index: number): SpeechRecognitionAlternative
  [index: number]: SpeechRecognitionAlternative
  isFinal: boolean
}

type SpeechRecognitionAlternative = {
  transcript: string
  confidence: number
}

interface SpeechRecognitionErrorEvent extends Event {
  error: string
}

declare global {
  // eslint-disable-next-line no-unused-vars
  interface Window {
    SpeechRecognition: {
      new (): SpeechRecognition
    }
    webkitSpeechRecognition: {
      new (): SpeechRecognition
    }
  }
}

export type PromptInputSpeechButtonProps = ComponentProps<
  typeof PromptInputButton
> & {
  textareaRef?: RefObject<HTMLTextAreaElement | null>
  onTranscriptionChange?: (text: string) => void
}

export const PromptInputSpeechButton = ({
  className,
  textareaRef,
  onTranscriptionChange,
  ...props
}: PromptInputSpeechButtonProps) => {
  const [isListening, setIsListening] = useState(false)
  const [recognition, setRecognition] = useState<SpeechRecognition | null>(null)
  const recognitionRef = useRef<SpeechRecognition | null>(null)

  useEffect(() => {
    if (
      typeof window !== 'undefined' &&
      ('SpeechRecognition' in window || 'webkitSpeechRecognition' in window)
    ) {
      const SpeechRecognition =
        window.SpeechRecognition || window.webkitSpeechRecognition
      const speechRecognition = new SpeechRecognition()

      speechRecognition.continuous = true
      speechRecognition.interimResults = true
      speechRecognition.lang = 'en-US'

      speechRecognition.onstart = () => {
        setIsListening(true)
      }

      speechRecognition.onend = () => {
        setIsListening(false)
      }

      speechRecognition.onresult = event => {
        let finalTranscript = ''

        const results = Array.from(event.results)

        for (const result of results) {
          if (result.isFinal) {
            finalTranscript += result[0]?.transcript ?? ''
          }
        }

        if (finalTranscript && textareaRef?.current) {
          const textarea = textareaRef.current
          const currentValue = textarea.value
          const newValue =
            currentValue + (currentValue ? ' ' : '') + finalTranscript

          textarea.value = newValue
          textarea.dispatchEvent(new Event('input', { bubbles: true }))
          onTranscriptionChange?.(newValue)
        }
      }

      speechRecognition.onerror = event => {
        console.error('Speech recognition error:', event.error)
        setIsListening(false)
      }

      recognitionRef.current = speechRecognition
      setRecognition(speechRecognition)
    }

    return () => {
      if (recognitionRef.current) {
        recognitionRef.current.stop()
      }
    }
  }, [textareaRef, onTranscriptionChange])

  const toggleListening = useCallback(() => {
    if (!recognition) {
      return
    }

    if (isListening) {
      recognition.stop()
    } else {
      recognition.start()
    }
  }, [recognition, isListening])

  return (
    <PromptInputButton
      className={cn(
        'relative transition-all duration-200',
        isListening && 'animate-pulse bg-accent text-accent-foreground',
        className
      )}
      disabled={!recognition}
      onClick={toggleListening}
      {...props}
    >
      <MicIcon className="size-4" />
    </PromptInputButton>
  )
}

export type PromptInputModelSelectProps = ComponentProps<typeof Select>

export const PromptInputModelSelect = (props: PromptInputModelSelectProps) => (
  <Select {...props} />
)

export type PromptInputModelSelectTriggerProps = ComponentProps<
  typeof SelectTrigger
>

export const PromptInputModelSelectTrigger = ({
  className,
  ...props
}: PromptInputModelSelectTriggerProps) => (
  <SelectTrigger
    className={cn(
      'border-none bg-transparent font-medium text-muted-foreground shadow-none transition-colors',
      'hover:bg-accent hover:text-foreground [&[aria-expanded="true"]]:bg-accent [&[aria-expanded="true"]]:text-foreground',
      className
    )}
    {...props}
  />
)

export type PromptInputModelSelectContentProps = ComponentProps<
  typeof SelectContent
>

export const PromptInputModelSelectContent = ({
  className,
  ...props
}: PromptInputModelSelectContentProps) => (
  <SelectContent className={cn(className)} {...props} />
)

export type PromptInputModelSelectItemProps = ComponentProps<typeof SelectItem>

export const PromptInputModelSelectItem = ({
  className,
  ...props
}: PromptInputModelSelectItemProps) => (
  <SelectItem className={cn(className)} {...props} />
)

export type PromptInputModelSelectValueProps = ComponentProps<
  typeof SelectValue
>

export const PromptInputModelSelectValue = ({
  className,
  ...props
}: PromptInputModelSelectValueProps) => (
  <SelectValue className={cn(className)} {...props} />
)

export type PromptInputHoverCardProps = ComponentProps<typeof HoverCard>

export const PromptInputHoverCard = ({
  openDelay = 0,
  closeDelay = 0,
  ...props
}: PromptInputHoverCardProps) => (
  <HoverCard closeDelay={closeDelay} openDelay={openDelay} {...props} />
)

export type PromptInputHoverCardTriggerProps = ComponentProps<
  typeof HoverCardTrigger
>

export const PromptInputHoverCardTrigger = (
  props: PromptInputHoverCardTriggerProps
) => <HoverCardTrigger {...props} />

export type PromptInputHoverCardContentProps = ComponentProps<
  typeof HoverCardContent
>

export const PromptInputHoverCardContent = ({
  align = 'start',
  ...props
}: PromptInputHoverCardContentProps) => (
  <HoverCardContent align={align} {...props} />
)

export type PromptInputTabsListProps = HTMLAttributes<HTMLDivElement>

export const PromptInputTabsList = ({
  className,
  ...props
}: PromptInputTabsListProps) => <div className={cn(className)} {...props} />

export type PromptInputTabProps = HTMLAttributes<HTMLDivElement>

export const PromptInputTab = ({
  className,
  ...props
}: PromptInputTabProps) => <div className={cn(className)} {...props} />

export type PromptInputTabLabelProps = HTMLAttributes<HTMLHeadingElement>

export const PromptInputTabLabel = ({
  className,
  ...props
}: PromptInputTabLabelProps) => (
  <h3
    className={cn(
      'mb-2 px-3 font-medium text-muted-foreground text-xs',
      className
    )}
    {...props}
  />
)

export type PromptInputTabBodyProps = HTMLAttributes<HTMLDivElement>

export const PromptInputTabBody = ({
  className,
  ...props
}: PromptInputTabBodyProps) => (
  <div className={cn('space-y-1', className)} {...props} />
)

export type PromptInputTabItemProps = HTMLAttributes<HTMLDivElement>

export const PromptInputTabItem = ({
  className,
  ...props
}: PromptInputTabItemProps) => (
  <div
    className={cn(
      'flex items-center gap-2 px-3 py-2 text-xs hover:bg-accent',
      className
    )}
    {...props}
  />
)