import { 
    ADD_CUSTOMER, 
    SET_CUSTOMERS, 
    SET_LOADING_CUSTOMERS, 
    SET_SELECTED_CUSTOMER, 
    SET_SHOW_CUSTOMER_FORM
} from '@/constants/mutationTypes'

import { 
    INIT_CUSTOMERS, 
    SHOW_CUSTOMER_FORM, 
    HIDE_CUSTOMER_FORM, 
    SUBMIT_CUSTOMER, 
    CREATE_CUSTOMER, 
    RECEIVE_CUSTOMER, 
    SELECT_CUSTOMER, 
    RESET_CUSTOMER
} from '@/constants/actionTypes'

const initialState = {
    customers: [],
    loadingCustomers: false,
    showingCustomerForm: false,
    selectedCustomer: null
}

const state = {
    customers: initialState.customers,
    loadingCustomers: !initialState.loadingCustomers,
    showingCustomerForm: initialState.showingCustomerForm,
    selectedCustomer: initialState.selectedCustomer
}

const getters = {
    /**
     * 
     * @param {*} state 
     */
    customers(state) {
        return state.customers
    },
    /**
     * 
     * @param {*} state 
     */
    loadingCustomers(state) {
        return state.loadingCustomers
    },
    /**
     * 
     * @param {*} state 
     */
    showingCustomerForm(state) {
        return state.showingCustomerForm
    },
    /**
     * 
     * @param {*} state 
     */
    selectedCustomer(state) {
        return state.selectedCustomer
    },
    /**
     * 
     * @param {*} state 
     */
    customerCredit(state) {
        return state.selectedCustomer && state.selectedCustomer.creditLimit >= state.selectedCustomer.credit ? state.selectedCustomer.creditLimit - state.credit : 0
    }
}

const mutations = {
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_CUSTOMERS] (state, payload) {
        state.customers = payload
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_LOADING_CUSTOMERS] (state, payload) {
        state.loadingCustomers = !!payload
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_SHOW_CUSTOMER_FORM] (state, payload) {
        state.showingCustomerForm = !!payload
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [ADD_CUSTOMER] (state, payload) {
        state.customers = [payload, ...state.customers]
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_SELECTED_CUSTOMER] (state, payload) {
        state.selectedCustomer = payload
    }
}

const actions = {
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [INIT_CUSTOMERS] ({ commit }, payload) {
        commit(SET_CUSTOMERS, payload)
        commit(SET_LOADING_CUSTOMERS)
    },
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [SHOW_CUSTOMER_FORM] ({ commit }) {
        commit(SET_SHOW_CUSTOMER_FORM, true)
    },
    /**
     * 
     * @param {*} param0 
     */
    [HIDE_CUSTOMER_FORM] ({ commit }) {
        commit(SET_SHOW_CUSTOMER_FORM, false)
    },
    /**
     * 
     * @param {*} param0 
     */
    [SUBMIT_CUSTOMER] ({ commit, dispatch }, payload) {
        commit(SET_LOADING_CUSTOMERS, true)
        dispatch(CREATE_CUSTOMER, payload)
        dispatch(HIDE_CUSTOMER_FORM)
    },
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [RECEIVE_CUSTOMER] ({ commit }, payload) {
        commit(ADD_CUSTOMER, payload)
        commit(SET_LOADING_CUSTOMERS, false)
    },
    /**
     * 
     * @param {*} param0 
     */
    [SELECT_CUSTOMER] ({ commit }, payload) {
        commit(SET_SELECTED_CUSTOMER, payload)
    },
    /**
     * 
     * @param {*} param0 
     */
    [RESET_CUSTOMER] ({ commit }) {
        commit(SET_LOADING_CUSTOMERS, true)
        commit(SET_CUSTOMERS, [])
        commit(SET_SELECTED_CUSTOMER, null)
    }
}

export default {
    state,
    getters,
    mutations,
    actions
}