const getGQL = url => {
  return (query, variables) => {
    return fetch(url, {
      method: 'POST',
      headers: {
        "content-type": "application/json",
        ...(localStorage.authToken ? { Authorization: "Bearer " + localStorage.authToken } : {})
      },
      body: JSON.stringify({ query, variables }),
    }).then(res => res.json())
  }
}

let gql = getGQL("/graphql")

let reg = async (login, password) => {
  let query = `mutation reg($l: String, $p: String) {
      UserUpsert(user:  {
          login: $l,
          password: $p
        } ) {
          _id
        }
    }`

  let qVariables = {
    "l": login,
    "p": password
  }

  let res = await gql(query, qVariables)
  return res
}

let log = async (login, password) => {
  let query = `query log($l: String, $p: String) {
          login(login: $l, password: $p)
        }`

  let qVariables = {
    "l": login,
    "p": password
  }

  let token = await gql(query, qVariables)
  return token.data.login
}

let userChats = async (id) => {
  let query = `query getUserChats($uid: String){
        UserFindOne(query: $uid){
          chats{
             _id title createdAt lastModified avatar{
            _id url
            } owner{
              _id login nick
            } members{
                _id login nick
            }
          }
        }
      }`

  let qVariables = {
    "uid": JSON.stringify([{ "_id": id }])
  }

  let result = await gql(query, qVariables)
  return result
}

let chatSortMSG = async (id, skipCount) => {
  let query = `query getMSG($query: String){
    MessageFind(query: $query){
     _id text createdAt media{
       url _id type
     } owner{
      login _id nick
      } replyTo {
        _id text createdAt owner{
          login _id nick
          }
      }
    }
  }`

  let qVariables = {
    "query": JSON.stringify([{ "chat._id": id }, { sort: [{ _id: -1 }], skip: [skipCount], limit: [30] }])
  }

  let result = await gql(query, qVariables)
  return result
}

let newChat = async (title, members) => {
  let membersQuery = []

  if (Array.isArray(members)) {
    members.map(member => membersQuery.push({ "_id": member._id }))
  }

  let query = `mutation newChat($chat: ChatInput){
        ChatUpsert(chat: $chat){
          _id title createdAt lastModified owner{
            _id login nick
          } avatar{
            _id url
          } messages {
            _id text createdAt owner{
              login nick
            }
          } members{
            _id login nick
          }
        }
      }`

  let qVariables = {
    "chat": {
      "title": title,
      "members": membersQuery
    }
  }

  let result = await gql(query, qVariables)
  return result
}

let editChat = async (chat_id, title, members) => {
  let input = {}
  input._id = chat_id
  input.title = title

  if (members && Array.isArray(members)) {
    let membersQuery = []

    members.map(member => membersQuery.push({ "_id": member._id }))

    input.members = membersQuery
  }

  let query = `mutation editChat($chat: ChatInput){
        ChatUpsert(chat: $chat){
          _id title members{
            _id login nick
          } avatar {
            _id url
          }
        }
      }`

  let qVariables = {
    "chat": input
  }

  let result = await gql(query, qVariables)
  return result
}

let avatarSet = async (avatar_id, chat_id) => {
  let query = `mutation setAvatar($avatar: MediaInput){
    MediaUpsert(media: $avatar){
      _id text url
    }
  }`

  let qVariables = {
    "avatar": {
      "_id": avatar_id,
      "chatAvatars": {
        "_id": chat_id
      }
    }
  }

  let result = await gql(query, qVariables)
  return result
}

let newMSG = async (chat_id, text, media, replyTo, forwardTo) => {
  let input = {}

  input.text = text
  input.media = []
  input.chat = {
    "_id": chat_id
  }

  if (replyTo) {
    input.replyTo = {
      "_id": replyTo
    }
  }

  if (forwardTo) {
    input.forwarded = {
      "_id": forwardTo
    }
  }

  if (media && Array.isArray(media)) {
    media.map(item => input.media.push({ "_id": item._id }))
  } else {
    input.media.push({})
  }

  let query = `mutation newMSG($msg: MessageInput){
        MessageUpsert(message: $msg){
          _id text createdAt owner{
            _id nick login
          } media{
            _id url type
          }
        }
      }`

  let qVariables = {
    "msg": input
  }

  let result = await gql(query, qVariables)
  return result
}

let editMSG = async (id, text) => {
  let input = {}
  input._id = id
  input.text = text

  let query = `mutation editMSG($msg: MessageInput){
        MessageUpsert(message: $msg){
          _id text media{
            _id url
          } chat{
            _id
          }
        }
      }`

  let qVariables = {
    "msg": input
  }

  let result = await gql(query, qVariables)
  return result
}

let userInfo = async (id) => {
  let query = `query user($uid: String){
    UserFindOne(query: $uid){
      _id login nick avatar{
        _id url
      }
    }
  }`

  let qVariables = {
    "uid": JSON.stringify([{ "_id": id }])
  }

  let result = await gql(query, qVariables)
  return result
}

let userSearch = async (searchInput) => {
  let query = `query usrsFND($search: String){
    UserFind(query: $search){
      _id login nick avatar{
        _id url
      }
    }
  }`

  let qVariables = {
    "search": JSON.stringify([
      {
        $or: [{ login: `/^${searchInput}/` }, { nick: `/^${searchInput}/` }]
      },
      {
        sort: [{ login: 1 }]
      }
    ])
  }

  let result = await gql(query, qVariables)
  return result
}

let changeNick = async (userID, nick) => {
  let query = `mutation passwordChange($input: UserInput){
    UserUpsert(user: $input){
      _id
    }
  }`

  let qVariables = {
    "input": {
      "_id": userID,
      "nick": nick
    }
  }

  let result = await gql(query, qVariables)
  return result
}

let changeUserAvatar = async (userID, imageID) => {
  let query = `mutation setUserAvatar($avatar: ImageInput){
    ImageUpsert(image: $avatar){
      _id text url
    }
  }`

  let qVariables = {
    "avatar": {
      "_id": imageID,
      "userAvatar": {
        "_id": userID
      }
    }
  }

  let result = await gql(query, qVariables)
  return result
}

let changeUserPassword = async (userID, newPassword) => {
  let query = `mutation passwordChange($input: UserInput){
    UserUpsert(user: $input){
      _id
    }
  }`

  let qVariables = {
    "input": {
      "_id": userID,
      "password": newPassword
    }
  }

  let result = await gql(query, qVariables)
  return result
}

const actionPending = name => ({ type: 'PROMISE', status: 'PENDING', name })
const actionResolved = (name, payload) => ({ type: 'PROMISE', status: 'RESOLVED', name, payload })
const actionRejected = (name, error) => ({ type: 'PROMISE', status: 'REJECTED', name, error })

const actionPromise = (name, promise) =>
  async dispatch => {
    dispatch(actionPending(name))
    try {
      let payload = await promise
      dispatch(actionResolved(name, payload))
      return payload
    }
    catch (error) {
      dispatch(actionRejected(name, error))
    }
  }

const actionAuthLogin = token => ({ type: "LOGIN", token })

const actionLogin = (login, password) => actionPromise("login", log(login, password))

export const actionFullLogin = (login, password) => {
  return async (dispatch) => {
    let result = await dispatch(actionLogin(login, password))
    console.log(result)
    dispatch(actionAuthLogin(result))
  }
}

const actionRegister = (login, password) => actionPromise("register", reg(login, password))

export const actionFullRegister = (login, password) => {
  return async (dispatch) => {
    let result = await dispatch(actionRegister(login, password))
    console.log(result)
    if (result.data.UserUpsert !== null) {
      dispatch(actionFullLogin(login, password))
    }
  }
}

let upload = async (files) => {
  let form = new FormData()

  if (Array.isArray(files)) {
    files.map(file => form.append("files[]", file))
  } else {
    form.append("media", files)
  }


  return fetch("/upload", {
    method: "POST",
    headers: localStorage.authToken ? { Authorization: 'Bearer ' + localStorage.authToken } : {},
    body: form
  }).then(res => res.json())
}

export const actionChangeUserAvatar = (userID, imageID) => actionPromise("changeUserAvatar", changeUserAvatar(userID, imageID))

export const actionChangeUserPassword = (userID, newPassword) => actionPromise("changeUserPassword", changeUserPassword(userID, newPassword))

export const actionChangeUserNick = (userID, nick) => actionPromise("changeUserNick", changeNick(userID, nick))

export const actionFullChangeUserNick = (userID, nick) => {
  return async (dispatch) => {
    let result = await dispatch(actionChangeUserNick(userID, nick))

    if (result.data.UserUpsert !== null) {
      dispatch(actionGetUserInfo(userID))
    }
  }
}

export const actionFullChangeUserAvatar = (userID, imageID) => {
  return async (dispatch) => {
    let result = await dispatch(actionChangeUserAvatar(userID, imageID))

    if (result.data.UserUpsert !== null) {
      dispatch(actionGetUserInfo(userID))
    }
  }
}

export const actionFullChangeUserPassword = (userID, newPassword) => {
  return async (dispatch) => {
    let result = await dispatch(actionChangeUserPassword(userID, newPassword))

    if (result.data.UserUpsert !== null) {
      dispatch(actionGetUserInfo(userID))
    }
  }
}

export const actionUploadFile = (files) => actionPromise("upload", upload(files))

export const actionAuthLogout = () => ({ type: "LOGOUT" })

export const actionGetUserInfo = (id) => actionPromise("userInfo", userInfo(id))

const actionGetChats = (id) => actionPromise("chats", userChats(id))

const actionGetMessages = (chatID, skipCount) => actionPromise("messages", chatSortMSG(chatID, skipCount))

const actionChats = (chat_id, title, createdAt, lastModified, avatar, messages, members) => ({ type: "CHAT", chat_id, title, createdAt, lastModified, avatar, messages, members })

const actionEditChat = (chat_id, title, avatar, members) => ({ type: "CHAT", chat_id, title, avatar, members })

const actionEditChatBack = (title, avatar, members) => actionPromise("edit_chat", editChat(title, avatar, members))

export const actionEditMSGback = (message_id, text, media) => actionPromise("edit_message", editMSG(message_id, text, media))

export const actionAddChatBack = (title, members) => actionPromise("chat", newChat(title, members))

export const actionAddChat = (chat_id, title, createdAt, lastModified, owner, avatar, messages, members) => ({ type: "CHAT", chat_id, title, createdAt, lastModified, owner, avatar, messages, members })

export const actionAddMSG = (socket, chat_id, msg_id, msg_text, msg_createdAt, msg_owner, msg_media, msg_replyTo) => ({ type: "MESSAGE", socket, chat_id, msg_id, msg_text, msg_createdAt, msg_owner, msg_media, msg_replyTo })

export const actionAddMSGBack = (chat_id, text, media, replyTo, forwardTo) => actionPromise("new_message", newMSG(chat_id, text, media, replyTo, forwardTo))

export const actionSetAvatar = (avatar_id, chat_id) => actionPromise("set_avatar", avatarSet(avatar_id, chat_id))

export const actionUserSearch = (searchInput) => actionPromise("userSearch", userSearch(searchInput))

export const actionFullGetChats = (id) => {
  return async (dispatch) => {
    let chats = await dispatch(actionGetChats(id))

    chats.data.UserFindOne.chats.map(async (chat) => {
      dispatch(actionChats(chat._id, chat.title, chat.createdAt, chat.lastModified, chat.avatar, [], chat.members))
    })
  }
}

export const actionFullGetMessages = (id, skip) => {
  return async (dispatch) => {
    let result = await dispatch(actionGetMessages(id, skip))
    let messages = result.data.MessageFind
    messages.map(message => dispatch(actionAddMSG(false, id, message._id, message.text, message.createdAt, message.owner, message.media, message.replyTo)))
  }
}

export const actionFullEditChat = (chat_id, title, avatar, members) => {
  return async (dispatch) => {
    let result = await dispatch(actionEditChatBack(chat_id, title, members))
    let avatarResult

    if (avatar) {
      avatarResult = await dispatch(actionSetAvatar(avatar, chat_id))
    }

    if (result.data.ChatUpsert && avatarResult?.data.MediaUpsert) {
      dispatch(actionEditChat(chat_id, title, avatarResult.data.MediaUpsert, members))
    } else if (result.data.ChatUpsert) {
      dispatch(actionEditChat(chat_id, title, null, members))
    }
  }
}