import { Map as ImmutableMap, fromJS } from "immutable";

import {
  REBLOG_REQUEST,
  REBLOG_FAIL,
  UNREBLOG_REQUEST,
  UNREBLOG_FAIL,
  FAVOURITE_REQUEST,
  FAVOURITE_FAIL,
  UNFAVOURITE_REQUEST,
  UNFAVOURITE_FAIL,
  BOOKMARK_REQUEST,
  BOOKMARK_FAIL,
  UNBOOKMARK_REQUEST,
  UNBOOKMARK_FAIL,
} from "flavours/glitch/actions/interactions";
import {
  STATUS_MUTE_SUCCESS,
  STATUS_UNMUTE_SUCCESS,
  STATUS_REVEAL,
  STATUS_HIDE,
  STATUS_COLLAPSE,
  STATUS_TRANSLATE_SUCCESS,
  STATUS_TRANSLATE_UNDO,
  STATUS_FETCH_REQUEST,
  STATUS_FETCH_FAIL,
} from "flavours/glitch/actions/statuses";
import {
  TIMELINE_DELETE,
} from "flavours/glitch/actions/timelines";

import { STATUS_IMPORT, STATUSES_IMPORT } from "../actions/importer";
import { normalizeStatusTranslation } from "../actions/importer/normalizer";

const importStatus = (state, status) => state.set(status.id, fromJS(status));

const importStatuses = (state, statuses) =>
  state.withMutations(mutable => statuses.forEach(status => importStatus(mutable, status)));

const deleteStatus = (state, id, references) => {
  references.forEach(ref => {
    state = deleteStatus(state, ref, []);
  });

  return state.delete(id);
};

const statusTranslateSuccess = (state, id, translation) => {
  return state.withMutations(map => {
    map.setIn([id, "translation"], fromJS(normalizeStatusTranslation(translation, map.get(id))));

    const list = map.getIn([id, "media_attachments"]);
    if (translation.media_attachments && list) {
      translation.media_attachments.forEach(item => {
        const index = list.findIndex(i => i.get("id") === item.id);
        map.setIn([id, "media_attachments", index, "translation"], fromJS({ description: item.description }));
      });
    }
  });
};

const statusTranslateUndo = (state, id) => {
  return state.withMutations(map => {
    map.deleteIn([id, "translation"]);
    map.getIn([id, "media_attachments"]).forEach((item, index) => map.deleteIn([id, "media_attachments", index, "translation"]));
  });
};

const initialState = ImmutableMap();

export default function statuses(state = initialState, action) {
  switch(action.type) {
    case STATUS_FETCH_REQUEST:
      return state.setIn([action.id, "isLoading"], true);
    case STATUS_FETCH_FAIL:
      return state.delete(action.id);
    case STATUS_IMPORT:
      return importStatus(state, action.status);
    case STATUSES_IMPORT:
      return importStatuses(state, action.statuses);
    case FAVOURITE_REQUEST:
      return state.setIn([action.status.get("id"), "favourited"], true);
    case FAVOURITE_FAIL:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "favourited"], false);
    case UNFAVOURITE_REQUEST:
      return state.setIn([action.status.get("id"), "favourited"], false);
    case UNFAVOURITE_FAIL:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "favourited"], true);
    case BOOKMARK_REQUEST:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "bookmarked"], true);
    case BOOKMARK_FAIL:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "bookmarked"], false);
    case UNBOOKMARK_REQUEST:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "bookmarked"], false);
    case UNBOOKMARK_FAIL:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "bookmarked"], true);
    case REBLOG_REQUEST:
      return state.setIn([action.status.get("id"), "reblogged"], true);
    case REBLOG_FAIL:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "reblogged"], false);
    case UNREBLOG_REQUEST:
      return state.setIn([action.status.get("id"), "reblogged"], false);
    case UNREBLOG_FAIL:
      return state.get(action.status.get("id")) === undefined ? state : state.setIn([action.status.get("id"), "reblogged"], true);
    case STATUS_MUTE_SUCCESS:
      return state.setIn([action.id, "muted"], true);
    case STATUS_UNMUTE_SUCCESS:
      return state.setIn([action.id, "muted"], false);
    case STATUS_REVEAL:
      return state.withMutations(map => {
        action.ids.forEach(id => {
          if (!(state.get(id) === undefined)) {
            map.setIn([id, "hidden"], false);
          }
        });
      });
    case STATUS_HIDE:
      return state.withMutations(map => {
        action.ids.forEach(id => {
          if (!(state.get(id) === undefined)) {
            map.setIn([id, "hidden"], true);
          }
        });
      });
    case STATUS_COLLAPSE:
      return state.setIn([action.id, "collapsed"], action.isCollapsed);
    case TIMELINE_DELETE:
      return deleteStatus(state, action.id, action.references);
    case STATUS_TRANSLATE_SUCCESS:
      return statusTranslateSuccess(state, action.id, action.translation);
    case STATUS_TRANSLATE_UNDO:
      return statusTranslateUndo(state, action.id);
    default:
      return state;
  }
}