// Copyright (c) 2019 Dominic Masters
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import { CounterState, InitialCounterState } from './../states/';
import { reduceReducers } from './';
import { Actions as CounterActions, ADD, SUB, SET, DO_THING } from './../actions/';

export const basicReducer = (state:CounterState = InitialCounterState, action:CounterActions) => {
  switch(action.type) {
    case ADD:
      return { ...state, counter: state.counter+action.amount };
    case SUB:
      return { ...state, counter: state.counter-action.amount };
    case SET:
      return { ...state, counter: action.value };
    default:
      return state;
  }
};

export const advancedReducer = (state:CounterState = InitialCounterState, action:CounterActions) => {
  switch(action.type) {
    case DO_THING:
      return { ...state, counter: state.counter * 2 };
    default:
      return state;
  }
};

export const counterReducer = reduceReducers<CounterState, CounterActions>(
  basicReducer, advancedReducer
);