import { apiUrl } from '../lib/apiOrigin'

export type FullRegisterPayload = {
  firstname: string
  lastname: string
  gender: string
  cellphone: string
  email: string
  confirm_email: string
  address_street: string
  apt?: string
  city: string
  state: string
  zip: string
  is_parent: boolean
  no_second_parent_info: boolean
  second_firstname?: string
  second_lastname?: string
  second_gender?: string
  second_email?: string
  second_cellphone?: string
  accept_school_policy: boolean
  captcha: string
}

export async function fetchRegisterCaptcha(): Promise<{ challenge: string }> {
  const res = await fetch(apiUrl('/api/v1/auth/register/captcha'), {
    method: 'GET',
    headers: { Accept: 'application/json' },
  })
  const body: unknown = await res.json().catch(() => null)
  if (!res.ok || !body || typeof body !== 'object') {
    throw new Error('Could not load CAPTCHA.')
  }
  const o = body as { ok?: boolean; captcha?: string }
  if (!o.ok || typeof o.captcha !== 'string') {
    throw new Error('Invalid CAPTCHA response.')
  }
  return { challenge: o.captcha }
}

export type FullRegisterSuccess = {
  ok: true
  message?: string
  registration?: unknown
}

export type FullRegisterFailure = {
  ok: false
  message: string
  errors?: Record<string, string[]>
}

export async function submitFullRegistration(
  payload: FullRegisterPayload,
): Promise<FullRegisterSuccess | FullRegisterFailure> {
  const body: Record<string, unknown> = {
    firstname: payload.firstname.trim(),
    lastname: payload.lastname.trim(),
    gender: payload.gender,
    cellphone: payload.cellphone.trim(),
    email: payload.email.trim(),
    confirm_email: payload.confirm_email.trim(),
    address_street: payload.address_street.trim(),
    apt: payload.apt?.trim() || '',
    city: payload.city.trim(),
    state: payload.state,
    zip: payload.zip.trim(),
    is_parent: payload.is_parent,
    no_second_parent_info: payload.no_second_parent_info,
    accept_school_policy: payload.accept_school_policy,
    captcha: payload.captcha.trim(),
  }

  if (payload.is_parent && !payload.no_second_parent_info) {
    body.second_firstname = payload.second_firstname?.trim() ?? ''
    body.second_lastname = payload.second_lastname?.trim() ?? ''
    body.second_gender = payload.second_gender ?? ''
    body.second_email = payload.second_email?.trim() ?? ''
    body.second_cellphone = payload.second_cellphone?.trim() ?? ''
  }

  const res = await fetch(apiUrl('/api/v1/auth/register'), {
    method: 'POST',
    headers: {
      Accept: 'application/json',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify(body),
  })

  const data: unknown = await res.json().catch(() => null)

  if (res.ok && data && typeof data === 'object' && 'ok' in data && (data as { ok?: boolean }).ok === true) {
    return { ok: true, message: (data as { message?: string }).message, registration: (data as { registration?: unknown }).registration }
  }

  let message = 'Registration failed.'
  let errors: Record<string, string[]> | undefined
  if (data && typeof data === 'object') {
    const o = data as { message?: string; errors?: Record<string, string[] | string> }
    if (typeof o.message === 'string') message = o.message
    if (o.errors && typeof o.errors === 'object') {
      errors = {}
      for (const [k, v] of Object.entries(o.errors)) {
        if (Array.isArray(v)) errors[k] = v.map(String)
        else errors[k] = [String(v)]
      }
    }
  }

  return { ok: false, message, errors }
}

export async function fetchSchoolPolicyHtml(): Promise<string> {
  const res = await fetch(apiUrl('/api/v1/policies/school'), {
    headers: { Accept: 'application/json' },
  })
  const json = (await res.json().catch(() => null)) as {
    data?: { policy?: { content?: string } }
  }
  const html = json?.data?.policy?.content
  if (!res.ok || !html) {
    return '<p>Unable to load policy. Please contact the school.</p>'
  }
  return html
}