'use client'

/**
 * ConsumerInput — consumer-only form fields (direct heroui + RHF).
 *
 * **Design props**
 * - `size`: `sm` | `md` | `lg`
 * - `radius`: `full` (pill) | `control` (10px)
 * - `tone`: `muted` (#E2E2E280 fill) | `bordered` (white + border). Select is always `muted`.
 *
 * Use in `app/(consumer)/**` and `components/consumer/**` instead of
 * `components/formElements/Input`.
 *
 * Guidelines: `frontend/docs/consumer-ui-guidelines.md`
 */

import { useEffect } from 'react'
import { FormProvider, useForm, useFormContext, type UseFormReturn } from 'react-hook-form'

import ConsumerChoiceField from '@/components/consumer/input/ConsumerChoiceField'
import ConsumerSelectField from '@/components/consumer/input/ConsumerSelectField'
import ConsumerTextareaField from '@/components/consumer/input/ConsumerTextareaField'
import { ConsumerNumberField, ConsumerTextField } from '@/components/consumer/input/ConsumerTextField'
import { defaultValueForConsumerField, type ConsumerInputProps } from '@/components/consumer/input/consumerInputTypes'
import { texts, format } from '@/texts'

export type { ConsumerInputProps } from '@/components/consumer/input/consumerInputTypes'

function useOptionalFormContext(): UseFormReturn | null {
  const context = useFormContext() as UseFormReturn | null

  return context?.control ? context : null
}

function ConsumerInputFields({
  radius = 'control',
  size = 'md',
  tone,
  isClearable = false,
  inputWrapper,
  orientation = 'vertical',
  direction = 'rtl',
  englishDigitsOnly = false,
  otpLength = 4,
  otpClassNames,
  selectKey = 'code',
  selectValue = 'name',
  textAreaMinRows = 5,
  ...props
}: ConsumerInputProps) {
  const { control } = useFormContext()
  const placeholder =
    props.placeholder ??
    (props.generalType === 'select'
      ? undefined
      : typeof props.label === 'string'
        ? format(texts.common.enterField, { label: props.label })
        : '')

  switch (props.generalType) {
    case 'numberInput':
      return (
        <ConsumerNumberField
          ariaLabel={props.ariaLabel}
          autoFocus={props.autoFocus}
          className={props.className}
          control={control}
          description={props.description}
          direction={direction}
          disabled={props.disabled}
          englishDigitsOnly={englishDigitsOnly}
          formatOptions={props.formatOptions}
          iconEnd={props.iconEnd}
          iconStart={props.iconStart}
          inputWrapper={inputWrapper}
          isClearable={isClearable}
          label={props.label}
          labelIcon={props.labelIcon}
          maxValue={props.maxValue}
          minValue={props.minValue}
          name={props.name}
          placeholder={placeholder}
          radius={radius}
          readonly={props.readonly}
          required={props.required}
          size={size}
          tone={tone}
          onBlur={props.onBlur}
          onClear={props.onClear}
        />
      )

    case 'input':
      return (
        <ConsumerTextField
          ariaLabel={props.ariaLabel}
          autoFocus={props.autoFocus}
          className={props.className}
          control={control}
          description={props.description}
          direction={direction}
          disabled={props.disabled}
          englishDigitsOnly={englishDigitsOnly}
          iconEnd={props.iconEnd}
          iconStart={props.iconStart}
          inputType={props.inputType}
          inputWrapper={inputWrapper}
          isClearable={isClearable}
          label={props.label}
          labelIcon={props.labelIcon}
          maxValue={props.maxValue}
          minValue={props.minValue}
          name={props.name}
          placeholder={placeholder}
          radius={radius}
          readonly={props.readonly}
          required={props.required}
          size={size}
          tone={tone}
          onBlur={props.onBlur}
          onClear={props.onClear}
          onKeyDown={props.onKeyDown}
        />
      )

    case 'textarea':
      return (
        <ConsumerTextareaField
          autoFocus={props.autoFocus}
          className={props.className}
          control={control}
          description={props.description}
          disabled={props.disabled}
          inputWrapper={inputWrapper}
          isClearable={isClearable}
          label={props.label}
          name={props.name}
          placeholder={placeholder}
          radius={radius}
          readonly={props.readonly}
          required={props.required}
          textAreaMinRows={textAreaMinRows}
          tone={tone}
          onBlur={props.onBlur}
        />
      )

    case 'select':
      return (
        <ConsumerSelectField
          ariaLabel={props.ariaLabel}
          autoFocus={props.autoFocus}
          className={props.className}
          control={control}
          description={props.description}
          disabled={props.disabled}
          iconEnd={props.iconEnd}
          iconStart={props.iconStart}
          inputWrapper={inputWrapper}
          label={props.label}
          multiple={props.multiple}
          name={props.name}
          options={props.selectOptions ?? []}
          placeholder={placeholder}
          radius={radius}
          readonly={props.readonly}
          required={props.required}
          selectKey={selectKey}
          selectValue={selectValue}
          size={size}
          tone={tone}
        />
      )

    case 'radio':
    case 'checkbox':
    case 'otp':
    case 'switch':
      return (
        <ConsumerChoiceField
          autoFocus={props.autoFocus}
          className={props.className}
          control={control}
          description={props.description}
          disabled={props.disabled}
          kind={props.generalType}
          label={props.label}
          name={props.name}
          options={props.radioOptions ?? []}
          orientation={orientation}
          otpClassNames={otpClassNames}
          otpLength={otpLength}
          placeholder={placeholder}
          radius={radius}
          readonly={props.readonly}
          required={props.required}
          selectKey={selectKey}
          size={size}
        />
      )

    default:
      return null
  }
}

function ConsumerInputStandalone(props: ConsumerInputProps) {
  const { name, generalType, value, onValueChange } = props
  const methods = useForm({
    defaultValues: { [name]: value ?? defaultValueForConsumerField(generalType) },
    values: value !== undefined ? { [name]: value } : undefined,
  })

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

    const subscription = methods.watch((values, info) => {
      if (info.name && info.name !== name) return
      onValueChange(values[name])
    })

    return () => {
      subscription.unsubscribe()
    }
  }, [methods, name, onValueChange])

  return (
    <FormProvider {...methods}>
      <ConsumerInputFields {...props} />
    </FormProvider>
  )
}

export default function ConsumerInput(props: ConsumerInputProps) {
  const form = useOptionalFormContext()
  const isControlled = props.value !== undefined || props.onValueChange !== undefined

  if (!form || isControlled) {
    return <ConsumerInputStandalone {...props} />
  }

  return <ConsumerInputFields {...props} />
}