import { Action } from "redux";
import { User } from "../../types/user";
import { SET_CURRENT_USER, setCurrentUserAction, LOGOUT } from "../actions/auth";

export interface AuthState {
  isAuthenticated: boolean
  currentUser: User
}

const defaultState = {
  isAuthenticated: false,
  currentUser: null,
};

export function authReducer(state = defaultState, action: Action): AuthState {
  switch (action.type) {
    case SET_CURRENT_USER:
      return handleSetCurrentUser(state, action as setCurrentUserAction);
    case LOGOUT:
      return handleLogout(state);
  }
  return state;
}

function handleSetCurrentUser(state: AuthState, { email }: setCurrentUserAction): AuthState {
  return {
    ...state,
    isAuthenticated: true,
    currentUser: {
      email
    }
  };
};

function handleLogout(state: AuthState): AuthState {
  return {
    ...state,
    isAuthenticated: false,
    currentUser: null,
  };
}