import api from '../api'
import { FormattedMessage } from 'react-intl'
import { CancelToken, isCancel } from 'axios'
import throttle from 'lodash.throttle'
import moment from 'moment-mini'
import { isMobile } from '../utils/is_mobile'
import { search as emojiSearch } from '../components/emoji/emoji_mart_search_light'
import { urlRegex } from '../features/ui/util/url_regex'
import { tagHistory } from '../settings'
import { joinGroup } from './groups'
import { useEmoji } from './emojis'
import resizeImage from '../utils/resize_image'
import { importFetchedAccounts } from './importer'
import {
  updateTimelineQueue,
  updateTimeline,
} from './timelines'
// import { showAlert, showAlertForError } from './alerts'
import { defineMessages } from 'react-intl'
import { openModal, closeModal } from './modal'
import {
  MODAL_COMPOSE,
  EXPIRATION_OPTION_5_MINUTES,
  EXPIRATION_OPTION_1_HOUR,
  EXPIRATION_OPTION_6_HOURS,
  EXPIRATION_OPTION_1_DAY,
  EXPIRATION_OPTION_3_DAYS,
  EXPIRATION_OPTION_7_DAYS,
} from '../constants'
import { me } from '../initial_state'
import { makeGetStatus } from '../selectors'

let cancelFetchComposeSuggestionsAccounts

export const COMPOSE_CHANGE          = 'COMPOSE_CHANGE'
export const COMPOSE_SUBMIT_REQUEST  = 'COMPOSE_SUBMIT_REQUEST'
export const COMPOSE_SUBMIT_SUCCESS  = 'COMPOSE_SUBMIT_SUCCESS'
export const COMPOSE_SUBMIT_FAIL     = 'COMPOSE_SUBMIT_FAIL'
export const COMPOSE_REPLY           = 'COMPOSE_REPLY'
export const COMPOSE_QUOTE           = 'COMPOSE_QUOTE'
export const COMPOSE_REPLY_CANCEL    = 'COMPOSE_REPLY_CANCEL'
export const COMPOSE_MENTION         = 'COMPOSE_MENTION'
export const COMPOSE_RESET           = 'COMPOSE_RESET'
export const COMPOSE_GROUP_SET       = 'COMPOSE_GROUP_SET'

export const COMPOSE_UPLOAD_REQUEST  = 'COMPOSE_UPLOAD_REQUEST'
export const COMPOSE_UPLOAD_SUCCESS  = 'COMPOSE_UPLOAD_SUCCESS'
export const COMPOSE_UPLOAD_FAIL     = 'COMPOSE_UPLOAD_FAIL'
export const COMPOSE_UPLOAD_PROGRESS = 'COMPOSE_UPLOAD_PROGRESS'
export const COMPOSE_UPLOAD_UNDO     = 'COMPOSE_UPLOAD_UNDO'

export const COMPOSE_SUGGESTIONS_CLEAR = 'COMPOSE_SUGGESTIONS_CLEAR'
export const COMPOSE_SUGGESTIONS_READY = 'COMPOSE_SUGGESTIONS_READY'
export const COMPOSE_SUGGESTION_SELECT = 'COMPOSE_SUGGESTION_SELECT'
export const COMPOSE_SUGGESTION_TAGS_UPDATE = 'COMPOSE_SUGGESTION_TAGS_UPDATE'

export const COMPOSE_TAG_HISTORY_UPDATE = 'COMPOSE_TAG_HISTORY_UPDATE'

export const COMPOSE_MOUNT   = 'COMPOSE_MOUNT'
export const COMPOSE_UNMOUNT = 'COMPOSE_UNMOUNT'

export const COMPOSE_SENSITIVITY_CHANGE  = 'COMPOSE_SENSITIVITY_CHANGE'
export const COMPOSE_SPOILERNESS_CHANGE  = 'COMPOSE_SPOILERNESS_CHANGE'
export const COMPOSE_SPOILER_TEXT_CHANGE = 'COMPOSE_SPOILER_TEXT_CHANGE'
export const COMPOSE_VISIBILITY_CHANGE   = 'COMPOSE_VISIBILITY_CHANGE'
export const COMPOSE_LISTABILITY_CHANGE  = 'COMPOSE_LISTABILITY_CHANGE'
export const COMPOSE_COMPOSING_CHANGE    = 'COMPOSE_COMPOSING_CHANGE'

export const COMPOSE_EMOJI_INSERT = 'COMPOSE_EMOJI_INSERT'

export const COMPOSE_UPLOAD_CHANGE_REQUEST = 'COMPOSE_UPLOAD_UPDATE_REQUEST'
export const COMPOSE_UPLOAD_CHANGE_SUCCESS = 'COMPOSE_UPLOAD_UPDATE_SUCCESS'
export const COMPOSE_UPLOAD_CHANGE_FAIL    = 'COMPOSE_UPLOAD_UPDATE_FAIL'

export const COMPOSE_POLL_ADD             = 'COMPOSE_POLL_ADD'
export const COMPOSE_POLL_REMOVE          = 'COMPOSE_POLL_REMOVE'
export const COMPOSE_POLL_OPTION_ADD      = 'COMPOSE_POLL_OPTION_ADD'
export const COMPOSE_POLL_OPTION_CHANGE   = 'COMPOSE_POLL_OPTION_CHANGE'
export const COMPOSE_POLL_OPTION_REMOVE   = 'COMPOSE_POLL_OPTION_REMOVE'
export const COMPOSE_POLL_SETTINGS_CHANGE = 'COMPOSE_POLL_SETTINGS_CHANGE'

export const COMPOSE_SCHEDULED_AT_CHANGE = 'COMPOSE_SCHEDULED_AT_CHANGE'

export const COMPOSE_EXPIRES_AT_CHANGE = 'COMPOSE_EXPIRES_AT_CHANGE'

export const COMPOSE_RICH_TEXT_EDITOR_CONTROLS_VISIBILITY = 'COMPOSE_RICH_TEXT_EDITOR_CONTROLS_VISIBILITY'

export const COMPOSE_CLEAR = 'COMPOSE_CLEAR'

const messages = defineMessages({
  uploadErrorLimit: { id: 'upload_error.limit', defaultMessage: 'File upload limit exceeded.' },
  uploadErrorPoll:  { id: 'upload_error.poll', defaultMessage: 'File upload not allowed with polls.' },
})

/**
 * 
 */
export const hydrateCompose = () => (dispatch, getState) => {
  const me = getState().getIn(['meta', 'me'])
  const history = tagHistory.get(me)

  if (history !== null) {
    dispatch(updateTagHistory(history))
  }
}

/**
 * 
 */
const insertIntoTagHistory = (recognizedTags, text) => (dispatch, getState) => {
  const state = getState()
  const oldHistory = state.getIn(['compose', 'tagHistory'])
  const me = state.getIn(['meta', 'me'])
  const names = recognizedTags.map(tag => text.match(new RegExp(`#${tag.name}`, 'i'))[0].slice(1))
  const intersectedOldHistory = oldHistory.filter(name => names.findIndex(newName => newName.toLowerCase() === name.toLowerCase()) === -1)

  names.push(...intersectedOldHistory.toJS())

  const newHistory = names.slice(0, 1000)

  tagHistory.set(me, newHistory)
  dispatch(updateTagHistory(newHistory))
}

/**
 * 
 */
export const changeCompose = (text, markdown, replyId, isStandalone, caretPosition) => (dispatch, getState) => {
  const reduxReplyToId = getState().getIn(['compose', 'in_reply_to'])
  const existingText = getState().getIn(['compose', 'text']).trim()
  const isModalOpen = getState().getIn(['modal', 'modalType']) === MODAL_COMPOSE || isStandalone

  let status
  if (!!replyId) {
    status = getState().getIn(['statuses', replyId])
    status = makeGetStatus()(getState(), {
      id: status.get('id')
    })
  }

  if (!!replyId && replyId !== reduxReplyToId && !isModalOpen) {
    if (existingText.length === 0 && text.trim().length > 0) {
      dispatch({
        type: COMPOSE_REPLY,
        status,
        text: text,
      })
    } else if (existingText.length > 0 && text.trim().length > 0) {
      dispatch(openModal('CONFIRM', {
        message: <FormattedMessage id='confirmations.reply.message' defaultMessage='Replying now will overwrite the message you are currently composing. Are you sure you want to proceed?' />,
        confirm: <FormattedMessage id='confirmations.reply.confirm' defaultMessage='Reply' />,
        onConfirm: () => {
          dispatch({
            type: COMPOSE_REPLY,
            status,
          })
          dispatch({
            type: COMPOSE_CHANGE,
            text: text,
            markdown: markdown,
            caretPosition: caretPosition,
          })
        }
      }))
    } else {
      dispatch({
        type: COMPOSE_REPLY_CANCEL,
      })
    }
  } else if (!replyId && !!reduxReplyToId && !isModalOpen) {
    if (existingText.length === 0 && text.trim().length > 0) {
      dispatch({
        type: COMPOSE_REPLY_CANCEL,
      })
      dispatch({
        type: COMPOSE_CHANGE,
        text: text,
        markdown: markdown,
        caretPosition: caretPosition,
      })
    } else if (existingText.length > 0 && text.trim().length > 0) {
      dispatch(openModal('CONFIRM', {
        message: <FormattedMessage id='confirmations.new_compose.message' defaultMessage='Composing now will overwrite the reply you are currently writing. Are you sure you want to proceed?' />,
        confirm: <FormattedMessage id='confirmations.new_compose.confirm' defaultMessage='Yes' />,
        onConfirm: () => {
          dispatch({
            type: COMPOSE_REPLY_CANCEL,
          })
          dispatch({
            type: COMPOSE_CHANGE,
            text: text,
            markdown: markdown,
            caretPosition: caretPosition,
          })
        },
      }))    
    } else {
      //
    }
  } else {
    dispatch({
      type: COMPOSE_CHANGE,
      text: text,
      markdown: markdown,
      caretPosition: caretPosition,
    })
  }
}

/**
 * 
 */
export const replyCompose = (status, router, showModal) => (dispatch) => {
  dispatch({
    type: COMPOSE_REPLY,
    status,
  })

  if (isMobile(window.innerWidth)) {
    router.history.push('/compose')
  } else {
    if (showModal) {
      dispatch(openModal(MODAL_COMPOSE))
    }
  }
}

/**
 * 
 */
export const quoteCompose = (status, router) => (dispatch) => {
  dispatch({
    type: COMPOSE_QUOTE,
    status,
  })

  if (isMobile(window.innerWidth)) {
    router.history.push('/compose')
  } else {
    dispatch(openModal(MODAL_COMPOSE))
  }
}

/**
 * 
 */
export const cancelReplyCompose = () => ({
  type: COMPOSE_REPLY_CANCEL,
})

/**
 * 
 */
export const resetCompose = () => ({
  type: COMPOSE_RESET,
})

/**
 * 
 */
export const mentionCompose = (account) => (dispatch) => {
  dispatch({
    type: COMPOSE_MENTION,
    account: account,
  })

  dispatch(openModal(MODAL_COMPOSE))
}

/**
 * 
 */
export const handleComposeSubmit = (dispatch, getState, response, status) => {
  if (!dispatch || !getState) return

  const isScheduledStatus = response.data.scheduled_at !== undefined
  if (isScheduledStatus) {
    // dispatch(showAlertForError({
    //   response: {
    //     data: {},
    //     status: 200,
    //     statusText: 'Successfully scheduled status',
    //   }
    // }))
    dispatch(submitComposeSuccess({ ...response.data }))
    return
  }

  dispatch(insertIntoTagHistory(response.data.tags, status))
  dispatch(submitComposeSuccess({ ...response.data }))

  // To make the app more responsive, immediately push the status into the timeline
  // : todo : push into comment, reload parent status, etc.
  const insertIfOnline = (timelineId) => {
    const timeline = getState().getIn(['timelines', timelineId])

    if (timeline && timeline.get('items').size > 0 && timeline.getIn(['items', 0]) !== null && timeline.get('online')) {
      dispatch(updateTimeline(timelineId, { ...response.data }))
    }
  }

  if (response.data.visibility === 'public') {
    insertIfOnline('home')
  }
}

/**
 * 
 */
export const submitCompose = (options = {}) => (dispatch, getState) => {
  if (!me) return

  if (options.autoJoinGroup) dispatch(joinGroup(groupId))

  let status = getState().getIn(['compose', 'text'], '')
  let markdown = getState().getIn(['compose', 'markdown'], '')
  
  const replacer = (match) => {
    const hasProtocol = match.startsWith('https://') || match.startsWith('http://')
    //Make sure not a remote mention like @someone@somewhere.com
    if (!hasProtocol) {
      if (status.indexOf(`@${match}`) > -1) return match
    }
    return hasProtocol ? match : `http://${match}`
  }

  // : hack :
  //Prepend http:// to urls in status that don't have protocol
  status = `${status}`.replace(urlRegex, replacer)
  markdown = !!markdown ? `${markdown}`.replace(urlRegex, replacer) : undefined

  const inReplyToId = getState().getIn(['compose', 'in_reply_to'], null)
  const groupId = getState().getIn(['compose', 'group_id'], null)
  const media = getState().getIn(['compose', 'media_attachments'])
  const isPrivateGroup = !!groupId ? getState().getIn(['groups', groupId, 'is_private'], false) : false
  const expires_at = getState().getIn(['compose', 'expires_at'], null)

  let scheduled_at = getState().getIn(['compose', 'scheduled_at'], null)
  if (scheduled_at !== null) scheduled_at = moment.utc(scheduled_at).toDate()

  //

  const id = getState().getIn(['compose', 'id'])
  const endpoint = id === null ? '/api/v1/statuses' : `/api/v1/statuses/${id}`
  const method = id === null ? 'post' : 'put'


  dispatch(submitComposeRequest())
  dispatch(closeModal())

  if (isMobile(window.innerWidth) && options.router && options.isStandalone) {
    options.router.history.goBack()
  }

  api(getState)[method](endpoint, {
    status,
    markdown,
    expires_at,
    scheduled_at,
    autoJoinGroup: options.autoJoinGroup,
    isPrivateGroup,
    in_reply_to_id: inReplyToId,
    quote_of_id: getState().getIn(['compose', 'quote_of_id'], null),
    media_ids: media.map(item => item.get('id')),
    sensitive: getState().getIn(['compose', 'sensitive']),
    spoiler_text: getState().getIn(['compose', 'spoiler_text'], ''),
    visibility: getState().getIn(['compose', 'privacy']),
    poll: getState().getIn(['compose', 'poll'], null),
    group_id: groupId || null,
  }, {
    headers: {
      'Idempotency-Key': getState().getIn(['compose', 'idempotencyKey']),
    },
  }).then((response) => {
    handleComposeSubmit(dispatch, getState, response, status)
  }).catch((error) => {
    dispatch(submitComposeFail(error))
  })
}

const submitComposeRequest = () => ({
  type: COMPOSE_SUBMIT_REQUEST,
})

const submitComposeSuccess = (status) => ({
  type: COMPOSE_SUBMIT_SUCCESS,
  showToast: true,
  status,
})

const submitComposeFail = (error) => ({
  type: COMPOSE_SUBMIT_FAIL,
  showToast: true,
  error,
})

/**
 * 
 */
export const uploadCompose = (files) => (dispatch, getState) => {
  if (!me) return

  const uploadLimit = 4
  const media  = getState().getIn(['compose', 'media_attachments'])
  const pending  = getState().getIn(['compose', 'pending_media_attachments'])
  const progress = new Array(files.length).fill(0)
  let total = Array.from(files).reduce((a, v) => a + v.size, 0)

  if (files.length + media.size + pending > uploadLimit) {
    // dispatch(showAlert(undefined, messages.uploadErrorLimit))
    return
  }

  if (getState().getIn(['compose', 'poll'])) {
    // dispatch(showAlert(undefined, messages.uploadErrorPoll))
    return
  }

  dispatch(uploadComposeRequest())

  for (const [i, f] of Array.from(files).entries()) {
    if (media.size + i > 3) break

    resizeImage(f).then((file) => {
      const data = new FormData()
      data.append('file', file)
      // Account for disparity in size of original image and resized data
      total += file.size - f.size

      return api(getState).post('/api/v1/media', data, {
        onUploadProgress: ({ loaded }) => {
          progress[i] = loaded
          dispatch(uploadComposeProgress(progress.reduce((a, v) => a + v, 0), total))
        },
      }).then(({ data }) => dispatch(uploadComposeSuccess(data)))
    }).catch((error) => dispatch(uploadComposeFail(error, true)))
  }
}

const uploadComposeRequest = () => ({
  type: COMPOSE_UPLOAD_REQUEST,
})

const uploadComposeProgress = (loaded, total) => ({
  type: COMPOSE_UPLOAD_PROGRESS,
  loaded: loaded,
  total: total,
})

const uploadComposeSuccess = (media) => ({
  type: COMPOSE_UPLOAD_SUCCESS,
  media: media,
})

const uploadComposeFail = (error) => ({
  type: COMPOSE_UPLOAD_FAIL,
  showToast: true,
  error,
})

/**
 * 
 */
export const changeUploadCompose = (id, params) => (dispatch, getState) => {
  if (!me) return

  dispatch(changeUploadComposeRequest())

  api(getState).put(`/api/v1/media/${id}`, params).then((response) => {
    dispatch(changeUploadComposeSuccess(response.data))
  }).catch((error) => {
    dispatch(changeUploadComposeFail(id, error))
  })
}

const changeUploadComposeRequest = () => ({
  type: COMPOSE_UPLOAD_CHANGE_REQUEST,
})

const changeUploadComposeSuccess = (media) => ({
  type: COMPOSE_UPLOAD_CHANGE_SUCCESS,
  media: media,
})

const changeUploadComposeFail = (error, decrement = false) => ({
  type: COMPOSE_UPLOAD_CHANGE_FAIL,
  error,
  showToast: true,
  decrement: decrement,
})

/**
 * 
 */
export const undoUploadCompose = (media_id) => ({
  type: COMPOSE_UPLOAD_UNDO,
  media_id: media_id,
})

/**
 * 
 */
export const clearComposeSuggestions = () => {
  if (cancelFetchComposeSuggestionsAccounts) {
    cancelFetchComposeSuggestionsAccounts()
  }

  return {
    type: COMPOSE_SUGGESTIONS_CLEAR,
  }
}

/**
 * 
 */
export const fetchComposeSuggestions = (token) => (dispatch, getState) => {
  switch (token[0]) {
  case ':':
    fetchComposeSuggestionsEmojis(dispatch, getState, token)
    break
  case '#':
    fetchComposeSuggestionsTags(dispatch, getState, token)
    break
  default:
    fetchComposeSuggestionsAccounts(dispatch, getState, token)
    break
  }
}

const fetchComposeSuggestionsAccounts = throttle((dispatch, getState, token) => {
  if (cancelFetchComposeSuggestionsAccounts) {
    cancelFetchComposeSuggestionsAccounts()
  }

  api(getState).get('/api/v1/accounts/search', {
    cancelToken: new CancelToken(cancel => {
      cancelFetchComposeSuggestionsAccounts = cancel
    }),
    params: {
      q: token.slice(1),
      resolve: false,
      limit: 4,
    },
  }).then((response) => {
    dispatch(importFetchedAccounts(response.data))
    dispatch(readyComposeSuggestionsAccounts(token, response.data))
  }).catch((error) => {
    if (!isCancel(error)) {
      // dispatch(showAlertForError(error))
    }
  })
}, 200, { leading: true, trailing: true })

const fetchComposeSuggestionsEmojis = (dispatch, getState, token) => {
  const results = emojiSearch(token.replace(':', ''), { maxResults: 5 })
  dispatch(readyComposeSuggestionsEmojis(token, results))
}

const fetchComposeSuggestionsTags = (dispatch, getState, token) => {
  dispatch(updateSuggestionTags(token))
}

const readyComposeSuggestionsEmojis = (token, emojis) => ({
  type: COMPOSE_SUGGESTIONS_READY,
  token,
  emojis,
})

const readyComposeSuggestionsAccounts = (token, accounts) => ({
  type: COMPOSE_SUGGESTIONS_READY,
  token,
  accounts,
})

/**
 * 
 */
export const selectComposeSuggestion = (position, token, suggestion, path) => (dispatch, getState) => {
  let completion, startPosition

  if (typeof suggestion === 'object' && suggestion.id) {
    completion = suggestion.native || suggestion.colons
    startPosition = position - 1

    dispatch(useEmoji(suggestion))
  } else if (suggestion[0] === '#') {
    completion = suggestion
    startPosition = position - 1
  } else {
    completion = getState().getIn(['accounts', suggestion, 'acct'])
    startPosition = position
  }

  dispatch({
    type: COMPOSE_SUGGESTION_SELECT,
    position: startPosition,
    token,
    completion,
    path,
  })
}

/**
 * 
 */
export const updateSuggestionTags = (token) => ({
  type: COMPOSE_SUGGESTION_TAGS_UPDATE,
  token,
})

/**
 * 
 */
export const updateTagHistory = (tags) => ({
  type: COMPOSE_TAG_HISTORY_UPDATE,
  tags,
})

/**
 * 
 */
export const mountCompose = () => ({
  type: COMPOSE_MOUNT,
})

/**
 * 
 */
export const unmountCompose = () => ({
  type: COMPOSE_UNMOUNT,
})

/**
 * 
 */
export const clearCompose = () => ({
  type: COMPOSE_CLEAR,
})

/**
 * 
 */
export const changeComposeSensitivity = () => ({
  type: COMPOSE_SENSITIVITY_CHANGE,
})

/**
 * 
 */
export const changeComposeSpoilerness = () => ({
  type: COMPOSE_SPOILERNESS_CHANGE,
})

/**
 * 
 */
export const changeComposeSpoilerText = (text) => ({
  type: COMPOSE_SPOILER_TEXT_CHANGE,
  text,
})

/**
 * 
 */
export const changeComposeVisibility = (value) => ({
  type: COMPOSE_VISIBILITY_CHANGE,
  value,
})

/**
 * 
 */
export const insertEmojiCompose = (emoji, needsSpace) => ({
  type: COMPOSE_EMOJI_INSERT,
  emoji,
  needsSpace,
})

/**
 * 
 */
export const changeComposing = (value) => ({
  type: COMPOSE_COMPOSING_CHANGE,
  value,
})

/**
 * 
 */
export const addPoll = () => ({
  type: COMPOSE_POLL_ADD,
})

/**
 * 
 */
export const removePoll = () => ({
  type: COMPOSE_POLL_REMOVE,
})

/**
 * 
 */
export const addPollOption = (title) => ({
  type: COMPOSE_POLL_OPTION_ADD,
  title,
})

/**
 * 
 */
export const changePollOption = (index, title) => ({
  type: COMPOSE_POLL_OPTION_CHANGE,
  index,
  title,
})

/**
 * 
 */
export const removePollOption = (index) => ({
  type: COMPOSE_POLL_OPTION_REMOVE,
  index,
})

/**
 * 
 */
export const changePollSettings = (expiresIn, isMultiple) => ({
  type: COMPOSE_POLL_SETTINGS_CHANGE,
  expiresIn,
  isMultiple,
})

/**
 * 
 */
export const changeScheduledAt = (date) => ({
  type: COMPOSE_SCHEDULED_AT_CHANGE,
  date,
})

/**
 * 
 */
export const changeExpiresAt = (value) => ({
  type: COMPOSE_EXPIRES_AT_CHANGE,
  value,
})

/**
 * 
 */
export const changeComposeGroupId = (groupId) => ({
  type: COMPOSE_GROUP_SET,
  groupId,
})

/**
 * 
 */
export const changeRichTextEditorControlsVisibility = (open) => ({
  type: COMPOSE_RICH_TEXT_EDITOR_CONTROLS_VISIBILITY,
  open,
})