import * as React from 'react'
import * as LabelPrimitive from '@radix-ui/react-label'
import { Slot } from '@radix-ui/react-slot'
import {
  Controller,
  ControllerProps,
  FieldPath,
  FieldValues,
  FormProvider,
  useFormContext,
} from 'react-hook-form'

import { cn, env } from '@/lib/utils'
import { Label } from '@/components/ui/label'
import TranslateClientFragment from '@/components/translate-client-fragment'

const Form = FormProvider

type FormFieldContextValue<TFieldValues extends FieldValues = FieldValues, TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>> = {
  name: TName
}

const FormFieldContext = React.createContext<FormFieldContextValue>(
  {} as FormFieldContextValue)

const FormField = <TFieldValues extends FieldValues = FieldValues, TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>> ({
  ...props
}: ControllerProps<TFieldValues, TName>) => {
  return (<FormFieldContext.Provider value={{ name: props.name }}>
    <Controller {...props} />
  </FormFieldContext.Provider>)
}

const useFormField = () => {
  const fieldContext = React.useContext(FormFieldContext)
  const itemContext = React.useContext(FormItemContext)
  const { getFieldState, formState } = useFormContext()

  const fieldState = getFieldState(fieldContext.name, formState)

  if (!fieldContext) {
    throw new Error('useFormField should be used within <FormField>')
  }

  const { id } = itemContext

  return {
    id,
    name: fieldContext.name,
    formItemId: `${id}-form-item`,
    formDescriptionId: `${id}-form-item-description`,
    formMessageId: `${id}-form-item-message`, ...fieldState,
  }
}

type FormItemContextValue = {
  id: string
}

const FormItemContext = React.createContext<FormItemContextValue>(
  {} as FormItemContextValue)

const FormItem = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
  ({ className, ...props }, ref) => {
    const id = React.useId()

    return (<FormItemContext.Provider value={{ id }}>
      <div ref={ref} className={cn('space-y-2', className)} {...props} />
    </FormItemContext.Provider>)
  })
FormItem.displayName = 'FormItem'

const FormLabel = React.forwardRef<React.ElementRef<typeof LabelPrimitive.Root>, React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root>>(
  ({ className, ...props }, ref) => {
    const { error, formItemId } = useFormField()

    return (<Label
      ref={ref}
      className={cn(error && 'text-destructive', className)}
      htmlFor={formItemId}
      {...props}
    />)
  })
FormLabel.displayName = 'FormLabel'

const FormControl = React.forwardRef<React.ElementRef<typeof Slot>, React.ComponentPropsWithoutRef<typeof Slot>>(
  ({ ...props }, ref) => {
    const {
      error,
      formItemId,
      formDescriptionId,
      formMessageId,
    } = useFormField()

    return (<Slot
      ref={ref}
      id={formItemId}
      aria-describedby={!error
        ? `${formDescriptionId}`
        : `${formDescriptionId} ${formMessageId}`}
      aria-invalid={!!error}
      {...props}
    />)
  })
FormControl.displayName = 'FormControl'

const FormDescription = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLParagraphElement>>(
  ({ className, ...props }, ref) => {
    const { formDescriptionId } = useFormField()

    return (<p
      ref={ref}
      id={formDescriptionId}
      className={cn('text-sm text-muted-foreground', className)}
      {...props}
    />)
  })
FormDescription.displayName = 'FormDescription'

const FormMessage = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLParagraphElement>>(
  ({ className, children, ...props }, ref) => {
    const { error, formMessageId } = useFormField()
    let body = error ? String(error?.message) : children

    if (!body) {
      return null
    }

    return (<p
      ref={ref}
      id={formMessageId}
      className={cn('text-sm font-medium text-destructive', className)}
      {...props}
    >
      {!env('IS_SERVER_FLAG') && typeof body === 'string' && body.match(/^(|\[")schema\./)
        ? <TranslateClientFragment message={body}/>
        : body}
    </p>)
  })
FormMessage.displayName = 'FormMessage'

export {
  useFormField,
  Form,
  FormItem,
  FormLabel,
  FormControl,
  FormDescription,
  FormMessage,
  FormField,
}