import { MoonpayEventName } from '@uniswap/analytics-events'
import { sendAnalyticsEvent } from 'analytics'
import { DEFAULT_TXN_DISMISS_MS } from 'constants/misc'
import { useCallback, useEffect, useMemo, useState } from 'react'
import { useAppDispatch, useAppSelector } from 'state/hooks'
import { AppState } from 'state/reducer'

import {
  addPopup,
  ApplicationModal,
  PopupContent,
  removePopup,
  setFiatOnrampAvailability,
  setOpenModal,
} from './reducer'

export function useModalIsOpen(modal: ApplicationModal): boolean {
  const openModal = useAppSelector((state: AppState) => state.application.openModal)
  return openModal === modal
}

/** @ref https://dashboard.moonpay.com/api_reference/client_side_api#ip_addresses */
interface MoonpayIPAddressesResponse {
  alpha3?: string
  isAllowed?: boolean
  isBuyAllowed?: boolean
  isSellAllowed?: boolean
}

async function getMoonpayAvailability(): Promise<boolean> {
  const moonpayPublishableKey = process.env.REACT_APP_MOONPAY_PUBLISHABLE_KEY
  if (!moonpayPublishableKey) {
    throw new Error('Must provide a publishable key for moonpay.')
  }
  const moonpayApiURI = process.env.REACT_APP_MOONPAY_API
  if (!moonpayApiURI) {
    throw new Error('Must provide an api endpoint for moonpay.')
  }
  const res = await fetch(`${moonpayApiURI}/v4/ip_address?apiKey=${moonpayPublishableKey}`)
  const data = await (res.json() as Promise<MoonpayIPAddressesResponse>)
  return data.isBuyAllowed ?? false
}

export function useFiatOnrampAvailability(shouldCheck: boolean, callback?: () => void) {
  const dispatch = useAppDispatch()
  const { available, availabilityChecked } = useAppSelector((state: AppState) => state.application.fiatOnramp)
  const [error, setError] = useState<string | null>(null)
  const [loading, setLoading] = useState(false)

  useEffect(() => {
    async function checkAvailability() {
      setError(null)
      setLoading(true)
      try {
        const result = await getMoonpayAvailability()
        sendAnalyticsEvent(MoonpayEventName.MOONPAY_GEOCHECK_COMPLETED, { success: result })
        if (stale) return
        dispatch(setFiatOnrampAvailability(result))
        if (result && callback) {
          callback()
        }
      } catch (e) {
        console.error('Error checking onramp availability', e.toString())
        if (stale) return
        setError('Error, try again later.')
        dispatch(setFiatOnrampAvailability(false))
      } finally {
        if (!stale) setLoading(false)
      }
    }

    if (!availabilityChecked && shouldCheck) {
      checkAvailability()
    }

    let stale = false
    return () => {
      stale = true
    }
  }, [availabilityChecked, callback, dispatch, shouldCheck])

  return { available, availabilityChecked, loading, error }
}

export function useToggleModal(modal: ApplicationModal): () => void {
  const isOpen = useModalIsOpen(modal)
  const dispatch = useAppDispatch()
  return useCallback(() => dispatch(setOpenModal(isOpen ? null : modal)), [dispatch, modal, isOpen])
}

export function useCloseModal() {
  const dispatch = useAppDispatch()
  const currentlyOpenModal = useAppSelector((state: AppState) => state.application.openModal)
  return useCallback(
    (modalToClose?: ApplicationModal) => {
      if (!modalToClose) {
        // Close any open modal if no modal is specified.
        dispatch(setOpenModal(null))
      } else if (currentlyOpenModal === modalToClose) {
        // Close the currently open modal if it is the one specified.
        dispatch(setOpenModal(null))
      }
    },
    [currentlyOpenModal, dispatch]
  )
}

export function useOpenModal(modal: ApplicationModal): () => void {
  const dispatch = useAppDispatch()
  return useCallback(() => dispatch(setOpenModal(modal)), [dispatch, modal])
}

export function useToggleSettingsMenu(): () => void {
  return useToggleModal(ApplicationModal.SETTINGS)
}

export function useShowClaimPopup(): boolean {
  return useModalIsOpen(ApplicationModal.CLAIM_POPUP)
}

export function useToggleShowClaimPopup(): () => void {
  return useToggleModal(ApplicationModal.CLAIM_POPUP)
}

export function useToggleSelfClaimModal(): () => void {
  return useToggleModal(ApplicationModal.SELF_CLAIM)
}

export function useToggleDelegateModal(): () => void {
  return useToggleModal(ApplicationModal.DELEGATE)
}

export function useToggleVoteModal(): () => void {
  return useToggleModal(ApplicationModal.VOTE)
}

export function useToggleQueueModal(): () => void {
  return useToggleModal(ApplicationModal.QUEUE)
}

export function useToggleExecuteModal(): () => void {
  return useToggleModal(ApplicationModal.EXECUTE)
}

export function useTogglePrivacyPolicy(): () => void {
  return useToggleModal(ApplicationModal.PRIVACY_POLICY)
}

export function useToggleFeatureFlags(): () => void {
  return useToggleModal(ApplicationModal.FEATURE_FLAGS)
}

// returns a function that allows adding a popup
export function useAddPopup(): (content: PopupContent, key?: string, removeAfterMs?: number) => void {
  const dispatch = useAppDispatch()

  return useCallback(
    (content: PopupContent, key?: string, removeAfterMs?: number) => {
      dispatch(addPopup({ content, key, removeAfterMs: removeAfterMs ?? DEFAULT_TXN_DISMISS_MS }))
    },
    [dispatch]
  )
}

// returns a function that allows removing a popup via its key
export function useRemovePopup(): (key: string) => void {
  const dispatch = useAppDispatch()
  return useCallback(
    (key: string) => {
      dispatch(removePopup({ key }))
    },
    [dispatch]
  )
}

// get the list of active popups
export function useActivePopups(): AppState['application']['popupList'] {
  const list = useAppSelector((state: AppState) => state.application.popupList)
  return useMemo(() => list.filter((item) => item.show), [list])
}
