import { useState } from 'react'
import { registrationDraft, useRegistrationDraft } from '@/entities/registration'
import { markCode, useCodeTimer } from '@/entities/verification-code'
import { t } from '@/shared/i18n'
import type { Errors } from '@/shared/lib'
import {
  birthError,
  emailError,
  normalizeEmail,
  passwordDigest,
  passwordError,
  useCountdown,
  usernameError,
  useTask,
} from '@/shared/lib'
import type { BirthValue } from '@/shared/ui'
import { emptyBirth } from '@/shared/ui'
import { sendRegisterCode } from '../api/register'

export function useRegisterAccount(onSent: () => void) {
  const draft = useRegistrationDraft()
  const [email, setEmail] = useState(draft?.email || '')
  const [username, setUsername] = useState(draft?.username || '')
  const [password, setPassword] = useState('')
  const [birth, setBirth] = useState<BirthValue>(draft?.birth || emptyBirth)
  const [agreed, setAgreed] = useState(draft?.agreed || false)
  const task = useTask()
  const retry = useCountdown(task.retryUntil)
  const timer = useCodeTimer(`register:${normalizeEmail(email)}`)
  function submit() {
    const address = normalizeEmail(email)
    const name = username.trim()
    const errors: Errors = {}
    if (emailError(address)) errors.email = emailError(address)
    if (usernameError(name)) errors.username = usernameError(name)
    if (password ? passwordError(password) : !draft?.passwordHash) errors.password = passwordError(password)
    if (birthError(birth.year, birth.month, birth.day)) errors.birth = birthError(birth.year, birth.month, birth.day)
    if (!agreed) errors.agreement = t('register.agreementError')
    if (Object.keys(errors).length) return task.fail(errors)
    void task.run(async (signal) => {
      const passwordHash = password ? await passwordDigest(password) : (draft?.passwordHash ?? '')
      if (address !== draft?.email || !timer.expiry) {
        const response = await sendRegisterCode(address, signal)
        markCode(`register:${address}`, response.expires_in_secs)
      }
      registrationDraft.set({ email: address, username: name, passwordHash, birth, agreed })
      onSent()
    })
  }
  return {
    draft,
    email,
    setEmail,
    username,
    setUsername,
    password,
    setPassword,
    birth,
    setBirth,
    agreed,
    setAgreed,
    task,
    retry,
    timer,
    submit,
  }
}

export type RegisterAccountModel = ReturnType<typeof useRegisterAccount>