import {routerReducer} from 'react-router-redux'

import {users} from './users'
import {calendar} from './calendar'
import {profile} from './profile'
import {messages} from './messages'
import {display} from './display'
import {mutes} from './mutes'
import {recruiters} from './recruiters'
import {missions} from './missions'
import {fields} from './fields'
import {demands} from './demands'
import authentication from './authentication'
import shifts from './shifts'

const combineReducers = (reducers) => (state = {}, action) => {
  const new_state = {}
  Object.keys(reducers).map((reducer_name) => {
    new_state[reducer_name] = reducers[reducer_name](state[reducer_name], action)
  })
  return new_state
}

const combined_reducers = combineReducers({
  authentication,
  users,
  calendar,
  profile,
  messages,
  display,
  mutes,
  recruiters,
  missions,
  fields,
  demands,
  shifts,
  routing: routerReducer,
})

export default function reducer(state, action) {
  if (action.type == 'logout') {
    state = undefined
  }
  if (action.type == 'combined_actions') {
    return action.actions.reduce(reducer, state)
  }
  return combined_reducers(state, action)
}