import {
  SELECTABLE_BUSINESS_PROMOTIONS_NEW_PAGE,
  SELECTABLE_BUSINESS_ONLINE_NEW_PAGE,
  SELECTABLE_PROMOTIONS_REMOVE,
  AVAILABLE_SELECTED_PROMOTIONS_NEW_PAGE,
  USED_SELECTED_PROMOTIONS_NEW_PAGE,
  DELETED_SELECTED_PROMOTIONS_NEW_PAGE,
  AVAILABLE_SELECTED_PROMOTIONS_REMOVE,
  DELETED_SELECTED_PROMOTIONS_REMOVE,
  ADD_PROMOTION_ADDRESS,
  ADD_PROMOTION_ADDRESS_SUCCESS,
  ADD_PROMOTION_ADDRESS_ERROR,
} from '../constants/promotions';

export const initialState = {
  selectableBusinessPromotions: [],
  selectableBusinessPromotionsMeta: {},
  selectableOnlinePromotions: [],
  selectableOnlinePromotionsMeta: {},
  availableSelectedPromotions: [],
  availableSelectedPromotionsMeta: {},
  usedSelectedPromotions: [],
  usedSelectedPromotionsMeta: {},
  deletedSelectedPromotions: [],
  deletedSelectedPromotionsMeta: {},
  isLoading: false,
};

const handleNewPromotionPage = (stateName, metaName) => (actionData, state) => {
  const { items, meta } = actionData;
  const { currentPage } = meta;
  let promotions;
  if (currentPage === 1) {
    promotions = [...items];
  } else {
    promotions = [...state[stateName], ...items];
  }

  return {
    ...state,
    [stateName]: promotions,
    [metaName]: meta,
  };
};

const promotionsReducer = (state = initialState, action) => {
  const { type: actionType, data: actionData } = action;
  switch (actionType) {
    case DELETED_SELECTED_PROMOTIONS_REMOVE: {
      const deletedSelectedPromotions = [
        ...state.deletedSelectedPromotions,
      ].filter(({ id }) => id !== actionData);
      return {
        ...state,
        deletedSelectedPromotions,
      };
    }
    case AVAILABLE_SELECTED_PROMOTIONS_REMOVE: {
      const availableSelectedPromotions = [
        ...state.availableSelectedPromotions,
      ].filter(({ id }) => id !== actionData);
      return {
        ...state,
        availableSelectedPromotions,
      };
    }
    case DELETED_SELECTED_PROMOTIONS_NEW_PAGE: {
      const { items, meta: deletedSelectedPromotionsMeta } = actionData;
      const { currentPage } = deletedSelectedPromotionsMeta;
      let deletedSelectedPromotions;
      if (currentPage === 1) {
        deletedSelectedPromotions = [...items];
      } else {
        deletedSelectedPromotions = [
          ...state.deletedSelectedPromotions,
          ...items,
        ];
      }

      return {
        ...state,
        deletedSelectedPromotions,
        deletedSelectedPromotionsMeta,
      };
    }
    case USED_SELECTED_PROMOTIONS_NEW_PAGE: {
      const { items, meta: usedSelectedPromotionsMeta } = actionData;
      const { currentPage } = usedSelectedPromotionsMeta;
      let usedSelectedPromotions;
      if (currentPage === 1) {
        usedSelectedPromotions = [...items];
      } else {
        usedSelectedPromotions = [...state.usedSelectedPromotions, ...items];
      }

      return {
        ...state,
        usedSelectedPromotions,
        usedSelectedPromotionsMeta,
      };
    }
    case AVAILABLE_SELECTED_PROMOTIONS_NEW_PAGE: {
      const { items, meta: availableSelectedPromotionsMeta } = actionData;
      const { currentPage } = availableSelectedPromotionsMeta;
      let availableSelectedPromotions;
      if (currentPage === 1) {
        availableSelectedPromotions = [...items];
      } else {
        availableSelectedPromotions = [
          ...state.availableSelectedPromotions,
          ...items,
        ];
      }

      return {
        ...state,
        availableSelectedPromotions,
        availableSelectedPromotionsMeta,
      };
    }
    case SELECTABLE_PROMOTIONS_REMOVE: {
      const selectableBusinessPromotions = [
        ...state.selectableBusinessPromotions,
      ].filter(({ id }) => id !== actionData);
      const selectableOnlinePromotions = [
        ...state.selectableOnlinePromotions,
      ].filter(({ id }) => id !== actionData);

      const selectableBusinessPromotionsMeta = {
        ...state.selectableBusinessPromotionsMeta,
      };
      if (
        selectableBusinessPromotions.length !==
        state.selectableBusinessPromotions.length
      ) {
        --selectableBusinessPromotionsMeta.totalItems;
      }

      const selectableOnlinePromotionsMeta = {
        ...state.selectableOnlinePromotionsMeta,
      };
      if (
        selectableOnlinePromotions.length !==
        state.selectableOnlinePromotions.length
      ) {
        --selectableOnlinePromotionsMeta.totalItems;
      }

      return {
        ...state,
        selectableOnlinePromotions,
        selectableOnlinePromotionsMeta,
        selectableBusinessPromotions,
        selectableBusinessPromotionsMeta,
      };
    }
    case SELECTABLE_BUSINESS_PROMOTIONS_NEW_PAGE: {
      return handleNewPromotionPage(
        'selectableBusinessPromotions',
        'selectableBusinessPromotionsMeta'
      )(actionData, state);
    }
    case SELECTABLE_BUSINESS_ONLINE_NEW_PAGE: {
      return handleNewPromotionPage(
        'selectableOnlinePromotions',
        'selectableOnlinePromotionsMeta'
      )(actionData, state);
    }

    case ADD_PROMOTION_ADDRESS:
      return { ...state, isLoading: true };

    case ADD_PROMOTION_ADDRESS_SUCCESS:
      return { ...state, isLoading: false };

    case ADD_PROMOTION_ADDRESS_ERROR:
      return { ...state, isLoading: false };
    default:
      return state;
  }
};

export default promotionsReducer;