import React, { FC, useMemo } from 'react';

export interface State {
  displaySidebar: boolean;
  displayCartSidebar: boolean;
  displayModal: boolean;
  modalData: any;
  modalView: string;
}

const initialState = {
  displaySidebar: false,
  displayCartSidebar: false,
  displayModal: false,
  modalView: 'LOGIN_VIEW',
  modalData: null,
};

type Action =
  | {
      type: 'OPEN_SIDEBAR';
    }
  | {
      type: 'CLOSE_SIDEBAR';
    }
  | {
      type: 'OPEN_CART_SIDEBAR';
    }
  | {
      type: 'CLOSE_CART_SIDEBAR';
    }
  | {
      type: 'OPEN_MODAL';
    }
  | {
      type: 'CLOSE_MODAL';
    }
  | {
      type: 'SET_MODAL_VIEW';
      view: MODAL_VIEWS;
    }
  | {
      type: 'SET_MODAL_DATA';
      data: MODAL_DATA;
    };

type MODAL_VIEWS =
  | 'SIGNUP_VIEW'
  | 'LOGIN_VIEW'
  | 'FORGOT_VIEW'
  | 'DELETE_PRODUCT'
  | 'BAN_CUSTOMER';
type MODAL_DATA = any;

export const UIContext = React.createContext<State | any>(initialState);

UIContext.displayName = 'UIContext';

function uiReducer(state: State, action: Action) {
  switch (action.type) {
    case 'OPEN_SIDEBAR': {
      return {
        ...state,
        displaySidebar: true,
      };
    }
    case 'CLOSE_SIDEBAR': {
      return {
        ...state,
        displaySidebar: false,
      };
    }
    case 'OPEN_CART_SIDEBAR': {
      return {
        ...state,
        displayCartSidebar: true,
      };
    }
    case 'CLOSE_CART_SIDEBAR': {
      return {
        ...state,
        displayCartSidebar: false,
      };
    }
    case 'OPEN_MODAL': {
      return {
        ...state,
        displayModal: true,
      };
    }
    case 'CLOSE_MODAL': {
      return {
        ...state,
        displayModal: false,
      };
    }
    case 'SET_MODAL_VIEW': {
      return {
        ...state,
        modalView: action.view,
      };
    }
    case 'SET_MODAL_DATA': {
      return {
        ...state,
        modalData: action.data,
      };
    }
  }
}

export const UIProvider: FC = (props) => {
  const [state, dispatch] = React.useReducer(uiReducer, initialState);

  const openSidebar = () => dispatch({ type: 'OPEN_SIDEBAR' });
  const closeSidebar = () => dispatch({ type: 'CLOSE_SIDEBAR' });
  const toggleSidebar = () =>
    state.displaySidebar
      ? dispatch({ type: 'CLOSE_SIDEBAR' })
      : dispatch({ type: 'OPEN_SIDEBAR' });
  const openCartSidebar = () => dispatch({ type: 'OPEN_CART_SIDEBAR' });
  const closeCartSidebar = () => dispatch({ type: 'CLOSE_CART_SIDEBAR' });
  const toggleCartSidebar = () =>
    state.displayCartSidebar
      ? dispatch({ type: 'CLOSE_CART_SIDEBAR' })
      : dispatch({ type: 'OPEN_CART_SIDEBAR' });
  const closeSidebarIfPresent = () =>
    state.displaySidebar && dispatch({ type: 'CLOSE_SIDEBAR' });

  const openModal = () => dispatch({ type: 'OPEN_MODAL' });
  const closeModal = () => dispatch({ type: 'CLOSE_MODAL' });

  const setModalView = (view: MODAL_VIEWS) =>
    dispatch({ type: 'SET_MODAL_VIEW', view });
  const setModalData = (data: MODAL_DATA) =>
    dispatch({ type: 'SET_MODAL_DATA', data });

  const value = useMemo(
    () => ({
      ...state,
      openSidebar,
      closeSidebar,
      toggleSidebar,
      openCartSidebar,
      closeCartSidebar,
      toggleCartSidebar,
      closeSidebarIfPresent,
      openModal,
      closeModal,
      setModalView,
      setModalData,
    }),
    [state]
  );

  return <UIContext.Provider value={value} {...props} />;
};

export const useUI = () => {
  const context = React.useContext(UIContext);
  if (context === undefined) {
    throw new Error(`useUI must be used within a UIProvider`);
  }
  return context;
};