import { useEffect, useRef, useState, type FormEvent } from 'react'
import { clubFormats } from '../data/content'
import { submitLead } from '../lib/lead'
import { cx } from '../lib/cx'
import { Button } from './Button'
import { ConsentCheckbox, Honeypot, SelectField, TextField, TextareaField } from './FormField'
import { ArrowRightIcon } from './Icons'

const EMPTY = {
  name: '',
  company: '',
  phone: '',
  email: '',
  city: '',
  club_format: clubFormats[0],
  comment: '',
}

type Status = { text: string; tone: 'idle' | 'success' | 'error' }

export function LeadForm({ configuration, commentPrefill }: { configuration: string; commentPrefill: string }) {
  const formRef = useRef<HTMLFormElement>(null)
  const [values, setValues] = useState(EMPTY)
  const [consent, setConsent] = useState(false)
  const [honeypot, setHoneypot] = useState('')
  const [pending, setPending] = useState(false)
  const [status, setStatus] = useState<Status>({ text: '', tone: 'idle' })

  // The constructor's "получить эту конфигурацию" CTA writes into the comment.
  useEffect(() => {
    if (commentPrefill) setValues((current) => ({ ...current, comment: commentPrefill }))
  }, [commentPrefill])

  const set = (key: keyof typeof EMPTY) => (event: { target: { value: string } }) =>
    setValues((current) => ({ ...current, [key]: event.target.value }))

  async function onSubmit(event: FormEvent<HTMLFormElement>) {
    event.preventDefault()
    const form = formRef.current
    if (!form) return

    if (!form.checkValidity()) {
      form.reportValidity()
      setStatus({ text: 'Проверьте обязательные поля и согласие.', tone: 'error' })
      return
    }

    if (honeypot) return

    setPending(true)
    setStatus({ text: '', tone: 'idle' })

    const result = await submitLead('request', { ...values, configuration, website: honeypot })

    if (result.ok) {
      setValues(EMPTY)
      setConsent(false)
      setStatus({ text: 'Спасибо. Заявка отправлена — специалист свяжется с вами.', tone: 'success' })
    } else {
      setStatus({ text: result.error ?? 'Не удалось отправить заявку.', tone: 'error' })
    }

    setPending(false)
  }

  return (
    <form
      ref={formRef}
      id="leadForm"
      noValidate
      onSubmit={onSubmit}
      className="bg-white p-[clamp(24px,4vw,42px)] text-ink"
    >
      <h3 className="mb-[8px] text-[28px]">Получить конфигурацию</h3>
      <p className="mb-[23px] text-[13px] text-muted">
        Выбранный в конструкторе состав автоматически добавится в заявку.
      </p>

      <div className="grid gap-[12px] sm:grid-cols-[1fr_1fr]">
        <TextField
          id="name"
          label="Имя *"
          name="name"
          autoComplete="name"
          placeholder="Ваше имя"
          required
          value={values.name}
          onChange={set('name')}
        />
        <TextField
          id="company"
          label="Фитнес-клуб / сеть *"
          name="company"
          autoComplete="organization"
          placeholder="Название клуба"
          required
          value={values.company}
          onChange={set('company')}
        />
        <TextField
          id="phone"
          label="Телефон *"
          name="phone"
          autoComplete="tel"
          inputMode="tel"
          placeholder="+7 999 000-00-00"
          required
          value={values.phone}
          onChange={set('phone')}
        />
        <TextField
          id="email"
          label="Email *"
          name="email"
          type="email"
          autoComplete="email"
          placeholder="name@company.ru"
          required
          value={values.email}
          onChange={set('email')}
        />
        <TextField
          id="city"
          label="Город"
          name="city"
          autoComplete="address-level2"
          placeholder="Город проекта"
          value={values.city}
          onChange={set('city')}
        />
        <SelectField
          id="clubFormat"
          label="Формат"
          name="club_format"
          options={clubFormats}
          value={values.club_format}
          onChange={set('club_format')}
        />
        <TextareaField
          id="comment"
          label="Комментарий"
          name="comment"
          full
          placeholder="Площадь, поток, задачи клуба, наличие медицинской лицензии"
          value={values.comment}
          onChange={set('comment')}
        />
      </div>

      <input name="configuration" type="hidden" value={configuration} readOnly />
      <Honeypot value={honeypot} onChange={setHoneypot} />
      <ConsentCheckbox checked={consent} onChange={setConsent} />

      <Button type="submit" className="w-full" disabled={pending}>
        {pending ? 'Отправляем…' : 'Получить предложение'}
        {pending ? null : <ArrowRightIcon />}
      </Button>

      <div
        aria-live="polite"
        className={cx(
          'mt-[11px] min-h-[20px] text-[12px]',
          status.tone === 'success' && 'text-[#087F73]',
          status.tone === 'error' && 'text-[#A14D12]',
          status.tone === 'idle' && 'text-muted',
        )}
      >
        {status.text}
      </div>
    </form>
  )
}