import { isLoggedIn } from 'soapbox/utils/auth';

import api from '../api';

import type { AxiosError } from 'axios';
import type { History } from 'history';
import type { AppDispatch, RootState } from 'soapbox/store';
import type { APIEntity } from 'soapbox/types/entities';

const GROUP_CREATE_REQUEST      = 'GROUP_CREATE_REQUEST';
const GROUP_CREATE_SUCCESS      = 'GROUP_CREATE_SUCCESS';
const GROUP_CREATE_FAIL         = 'GROUP_CREATE_FAIL';

const GROUP_UPDATE_REQUEST      = 'GROUP_UPDATE_REQUEST';
const GROUP_UPDATE_SUCCESS      = 'GROUP_UPDATE_SUCCESS';
const GROUP_UPDATE_FAIL         = 'GROUP_UPDATE_FAIL';

const GROUP_EDITOR_VALUE_CHANGE = 'GROUP_EDITOR_VALUE_CHANGE';
const GROUP_EDITOR_RESET        = 'GROUP_EDITOR_RESET';
const GROUP_EDITOR_SETUP        = 'GROUP_EDITOR_SETUP';

const submit = (routerHistory: History) =>
  (dispatch: AppDispatch, getState: () => RootState) => {
    const groupId = getState().group_editor.get('groupId') as string;
    const title = getState().group_editor.get('title') as string;
    const description = getState().group_editor.get('description') as string;
    const coverImage = getState().group_editor.get('coverImage') as any;

    if (groupId === null) {
      dispatch(create(title, description, coverImage, routerHistory));
    } else {
      dispatch(update(groupId, title, description, coverImage, routerHistory));
    }
  };

const create = (title: string, description: string, coverImage: File, routerHistory: History) =>
  (dispatch: AppDispatch, getState: () => RootState) => {
    if (!isLoggedIn(getState)) return;

    dispatch(createRequest());

    const formData = new FormData();
    formData.append('title', title);
    formData.append('description', description);

    if (coverImage !== null) {
      formData.append('cover_image', coverImage);
    }

    api(getState).post('/api/v1/groups', formData, { headers: { 'Content-Type': 'multipart/form-data' } }).then(({ data }) => {
      dispatch(createSuccess(data));
      routerHistory.push(`/groups/${data.id}`);
    }).catch(err => dispatch(createFail(err)));
  };

const createRequest = (id?: string) => ({
  type: GROUP_CREATE_REQUEST,
  id,
});

const createSuccess = (group: APIEntity) => ({
  type: GROUP_CREATE_SUCCESS,
  group,
});

const createFail = (error: AxiosError) => ({
  type: GROUP_CREATE_FAIL,
  error,
});

const update = (groupId: string, title: string, description: string, coverImage: File, routerHistory: History) =>
  (dispatch: AppDispatch, getState: () => RootState) => {
    if (!isLoggedIn(getState)) return;

    dispatch(updateRequest(groupId));

    const formData = new FormData();
    formData.append('title', title);
    formData.append('description', description);

    if (coverImage !== null) {
      formData.append('cover_image', coverImage);
    }

    api(getState).put(`/api/v1/groups/${groupId}`, formData, { headers: { 'Content-Type': 'multipart/form-data' } }).then(({ data }) => {
      dispatch(updateSuccess(data));
      routerHistory.push(`/groups/${data.id}`);
    }).catch(err => dispatch(updateFail(err)));
  };

const updateRequest = (id: string) => ({
  type: GROUP_UPDATE_REQUEST,
  id,
});

const updateSuccess = (group: APIEntity) => ({
  type: GROUP_UPDATE_SUCCESS,
  group,
});

const updateFail = (error: AxiosError) => ({
  type: GROUP_UPDATE_FAIL,
  error,
});

const changeValue = (field: string, value: string | File) => ({
  type: GROUP_EDITOR_VALUE_CHANGE,
  field,
  value,
});

const reset = () => ({
  type: GROUP_EDITOR_RESET,
});

const setUp = (group: string) => ({
  type: GROUP_EDITOR_SETUP,
  group,
});

export {
  GROUP_CREATE_REQUEST,
  GROUP_CREATE_SUCCESS,
  GROUP_CREATE_FAIL,
  GROUP_UPDATE_REQUEST,
  GROUP_UPDATE_SUCCESS,
  GROUP_UPDATE_FAIL,
  GROUP_EDITOR_VALUE_CHANGE,
  GROUP_EDITOR_RESET,
  GROUP_EDITOR_SETUP,
  submit,
  create,
  createRequest,
  createSuccess,
  createFail,
  update,
  updateRequest,
  updateSuccess,
  updateFail,
  changeValue,
  reset,
  setUp,
};