import * as types from '../constants/ActionTypes'

import * as TABS from '../constants/Tabs'

const tabs = TABS.tabs

let initialState = {}

tabs.forEach((item) => {

initialState[item] = {

pullRefreshPending: false,

reachedEndPending: false,

page: 1,

limit: 10,

flag: 0

}

})

export default function (state = initialState, action) {

const {payload, error, meta = {}, type} = action

const {sequence = {}, tab} = meta

const pending = sequence.type === 'start'

switch (type) {

case types.GET_TOPICS_BY_TAB:

return {

...state,

[tab]: {

...state[tab],

reachedEndPending: pending,

page: (!error && !pending) ? state[tab].page + 1 : state[tab].page

}

}

case types.UPDATE_TOPICS_BY_TAB:

return {

...state,

[tab]: {

...state[tab],

pullRefreshPending: pending,

page: initialState[tab].page,

flag: (!error && !pending) ? state[tab].flag + 1 : state[tab].flag

}

}

default:

return state

}

}