import { DOCUMENTS } from 'app/modules/documents/store/documents.constants';
import { DocumentsState } from './documents.types';
import { AnyAction } from 'redux';


export const defaultDocumentsState: DocumentsState = {
  categories: [],
  filters: {
    categoryIds: [],
    bookmarksOnly: false,
  },
  collection: [],
  collectionLimit: DOCUMENTS.DEFAULT_COLLECTION_LIMIT,
  bookmarks: [],
};

const documentsReducer = (state = defaultDocumentsState, action: AnyAction = { type: '' }) => {
  switch (action.type) {
    case DOCUMENTS.ADD_CATEGORY_FILTER:
      return {
        ...state,
        filters: {
          ...state.filters,
          categoryIds: [ ...state.filters.categoryIds, action.payload ],
        },
      };

    case DOCUMENTS.REMOVE_CATEGORY_FILTER:
      return {
        ...state,
        filters: {
          ...state.filters,
          categoryIds: state.filters.categoryIds.filter(categoryId => categoryId !== action.payload),
        },
      };

    case DOCUMENTS.RESET_CATEGORY_FILTER:
      return {
        ...state,
        filters: {
          ...state.filters,
          categoryIds: [],
        },
      };

    case DOCUMENTS.SET_BOOKMARKS_FILTER:
      return {
        ...state,
        filters: {
          ...state.filters,
          bookmarksOnly: action.payload,
        },
      };

    case DOCUMENTS.SET_COLLECTION:
      return {
        ...state,
        collection: action.payload,
      };

    case DOCUMENTS.SET_COLLECTION_LIMIT:
      return {
        ...state,
        collectionLimit: state.collectionLimit + DOCUMENTS.DEFAULT_COLLECTION_LIMIT,
      };

    case DOCUMENTS.RESET_COLLECTION_LIMIT:
      return {
        ...state,
        collectionLimit: defaultDocumentsState.collectionLimit,
      };

    case DOCUMENTS.SET_CATEGORIES:
      return {
        ...state,
        categories: action.payload,
      };

    case DOCUMENTS.FETCH_BOOKMARKS_SUCCESS:
      return {
        ...state,
        bookmarks: action.payload,
      };

    case DOCUMENTS.ADD_BOOKMARK_SUCCESS:
      return {
        ...state,
        bookmarks: [ ...state.bookmarks, action.payload ],
      };

    case DOCUMENTS.REMOVE_BOOKMARK_SUCCESS:
      return {
        ...state,
        bookmarks: state.bookmarks.filter(bookmark => bookmark !== action.payload),
      };

    default:
      return state;
  }
};

export { documentsReducer };