import { useEffect, useState } from 'react'

export function useAutoConnect(params: {
  accountExists: boolean | null
  pubkey: string | null
  showRecoveryStep: boolean
  showUnlockModal: boolean
  connect: () => Promise<void>
}): void {
  const { accountExists, pubkey, showRecoveryStep, showUnlockModal, connect } = params
  useEffect(() => {
    if (accountExists === true && !pubkey && !showRecoveryStep && !showUnlockModal) {
      void connect()
    }
  }, [accountExists, pubkey, showRecoveryStep, showUnlockModal, connect])
}

export function useConnectButtonUiState(): {
  showRecoveryStep: boolean
  showUnlockModal: boolean
  setShowUnlockModal: (show: boolean) => void
  recoveryPhrase: string[]
  npub: string
  creatingAccount: boolean
  createError: string | null
  onCreateAccount: () => void
  onRecoveryContinue: () => void
  onUnlockSuccess: () => void
  openUnlockModal: () => void
  closeUnlockModal: () => void
} {
  const unlockModal = useUnlockModalVisibility()
  const recovery = useRecoveryStepState()
  const [creatingAccount, setCreatingAccount] = useState(false)
  const [createError, setCreateError] = useState<string | null>(null)

  const onCreateAccount = (): void => {
    void handleCreateAccount({
      setCreatingAccount,
      setCreateError,
      setRecoveryPhrase: recovery.setRecoveryPhrase,
      setNpub: recovery.setNpub,
      setShowRecoveryStep: recovery.setShowRecoveryStep,
    })
  }

  const onRecoveryContinue = (): void => {
    recovery.hideRecoveryStep()
    unlockModal.openUnlockModal()
  }

  const onUnlockSuccess = (): void => {
    unlockModal.closeUnlockModal()
    recovery.resetRecoveryData()
  }

  return {
    showRecoveryStep: recovery.showRecoveryStep,
    showUnlockModal: unlockModal.showUnlockModal,
    setShowUnlockModal: unlockModal.setShowUnlockModal,
    recoveryPhrase: recovery.recoveryPhrase,
    npub: recovery.npub,
    creatingAccount,
    createError,
    onCreateAccount,
    onRecoveryContinue,
    onUnlockSuccess,
    openUnlockModal: unlockModal.openUnlockModal,
    closeUnlockModal: unlockModal.closeUnlockModal,
  }
}

function useUnlockModalVisibility(): {
  showUnlockModal: boolean
  setShowUnlockModal: (show: boolean) => void
  openUnlockModal: () => void
  closeUnlockModal: () => void
} {
  const [showUnlockModal, setShowUnlockModal] = useState(false)
  const openUnlockModal = (): void => setShowUnlockModal(true)
  const closeUnlockModal = (): void => setShowUnlockModal(false)
  return { showUnlockModal, setShowUnlockModal, openUnlockModal, closeUnlockModal }
}

function useRecoveryStepState(): {
  showRecoveryStep: boolean
  recoveryPhrase: string[]
  npub: string
  setShowRecoveryStep: (show: boolean) => void
  setRecoveryPhrase: (words: string[]) => void
  setNpub: (npub: string) => void
  hideRecoveryStep: () => void
  resetRecoveryData: () => void
} {
  const [showRecoveryStep, setShowRecoveryStep] = useState(false)
  const [recoveryPhrase, setRecoveryPhrase] = useState<string[]>([])
  const [npub, setNpub] = useState('')

  const hideRecoveryStep = (): void => setShowRecoveryStep(false)
  const resetRecoveryData = (): void => {
    setRecoveryPhrase([])
    setNpub('')
  }

  return {
    showRecoveryStep,
    recoveryPhrase,
    npub,
    setShowRecoveryStep,
    setRecoveryPhrase,
    setNpub,
    hideRecoveryStep,
    resetRecoveryData,
  }
}

async function handleCreateAccount(params: {
  setCreatingAccount: (creating: boolean) => void
  setCreateError: (error: string | null) => void
  setRecoveryPhrase: (words: string[]) => void
  setNpub: (npub: string) => void
  setShowRecoveryStep: (show: boolean) => void
}): Promise<void> {
  params.setCreatingAccount(true)
  params.setCreateError(null)
  try {
    const { nostrAuthService } = await import('@/lib/nostrAuth')
    const result = await nostrAuthService.createAccount()
    params.setRecoveryPhrase(result.recoveryPhrase)
    params.setNpub(result.npub)
    params.setShowRecoveryStep(true)
  } catch (e) {
    params.setCreateError(e instanceof Error ? e.message : 'Failed to create account')
  } finally {
    params.setCreatingAccount(false)
  }
}