import { 
    SET_PRODUCTS,
    SET_FILTERED_PRODUCTS,
    SET_LOADING_PRODUCTS, 
    SET_SHOW_PRODUCT_FORM, 
    SET_PRODUCT_WITH_VARIANT, 
    ADD_PRODUCT 
} from '@/constants/mutationTypes'

import { 
    INIT_PRODUCTS,
    FILTER_PRODUCTS,
    SHOW_PRODUCT_FORM, 
    HIDE_PRODUCT_FORM, 
    SUBMIT_PRODUCT, 
    CREATE_PRODUCT, 
    RECEIVE_PRODUCT, 
    SELECT_PRODUCT, 
    ADD_TO_CART,
    RESET_PRODUCT
} from '@/constants/actionTypes'

const initialState = {
    products: [],
    filteredProducts: [],
    loadingProducts: false,
    showingProductForm: false,
    showVariants: false,
    productWithVariant: null
}

const state = {
    products: initialState.products,
    filteredProducts: initialState.filteredProducts,
    loadingProducts: !initialState.loadingProducts,
    showingProductForm: initialState.showingProductForm,
    showVariants: initialState.showVariants,
    productWithVariant: initialState.productWithVariant
}

const getters = {
    /**
     * 
     * @param {*} state 
     */
    products(state) {
        return state.products
    },
    /**
     * 
     * @param {*} state 
     */
    visibleProducts(state) {
        return state.filteredProducts.length === 0 ? state.products : state.filteredProducts
    },
    /**
     * 
     * @param {*} state 
     */
    loadingProducts(state) {
        return state.loadingProducts
    },
    /**
     * 
     * @param {*} state 
     */
    showingProductForm(state) {
        return state.showingProductForm
    },
    /**
     * 
     * @param {*} state 
     */
    showVariants(state) {
        return state.showVariants
    },
    /**
     * 
     * @param {*} state 
     */
    productWithVariant(state) {
        return state.productWithVariant
    }
}

const mutations = {
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_PRODUCTS] (state, payload) {
        state.products = payload
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_FILTERED_PRODUCTS] (state, payload) {
        state.filteredProducts = [...payload]
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_LOADING_PRODUCTS] (state, payload) {
        state.loadingProducts = !!payload
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_SHOW_PRODUCT_FORM] (state, payload) {
        state.showingProductForm = !!payload
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [ADD_PRODUCT] (state, payload) {
        state.products = [payload, ...state.products]
    },
    /**
     * 
     * @param {*} state 
     * @param {*} payload 
     */
    [SET_PRODUCT_WITH_VARIANT] (state, payload) {
        state.productWithVariant = payload
    }
}

const actions = {
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [INIT_PRODUCTS] ({ commit }, payload) {
        commit(SET_PRODUCTS, payload)
        commit(SET_LOADING_PRODUCTS)
    },
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [FILTER_PRODUCTS] ({ commit }, payload) {
        commit(SET_FILTERED_PRODUCTS, payload)
    },
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [SHOW_PRODUCT_FORM] ({ commit }) {
        commit(SET_SHOW_PRODUCT_FORM, true)
    },
    /**
     * 
     * @param {*} param0 
     */
    [HIDE_PRODUCT_FORM] ({ commit }) {
        commit(SET_SHOW_PRODUCT_FORM, false)
    },
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [SUBMIT_PRODUCT] ({ commit, dispatch }, payload) {
        commit(SET_LOADING_PRODUCTS, true)
        dispatch(CREATE_PRODUCT, payload)
        dispatch(HIDE_PRODUCT_FORM)
    },
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    [RECEIVE_PRODUCT] ({ commit }, payload) {
        commit(ADD_PRODUCT, payload)
        commit(SET_LOADING_PRODUCTS, false)
    },
    /**
     * 
     * @param {*} param0 
     * @param {*} payload 
     */
    selectProduct({ commit, dispatch }, payload) {
        if (!payload) {
            commit(SET_PRODUCT_WITH_VARIANT, null)
            return
        }

        if (payload.variantCount > 1) {
            commit(SET_PRODUCT_WITH_VARIANT, payload)
            return
        }

        if (!payload.variantCount) {
            dispatch(ADD_TO_CART, payload)
            commit(SET_PRODUCT_WITH_VARIANT, null)
        } else {
            dispatch(ADD_TO_CART, payload.variants[0])
        }
    },
    /**
     * 
     * @param {*} param0 
     */
    [RESET_PRODUCT] ({ commit }) {
        commit(SET_LOADING_PRODUCTS, true)
        commit(SET_PRODUCTS, [])
        commit(SET_FILTERED_PRODUCTS, [])
    }
}

export default {
    state,
    getters,
    mutations,
    actions
}