'use strict';

import DiscountProductService from "../../services/DiscountProductService";
import Immutable from "immutable";


const {
    QUERY_DISCOUNT_PRODUCT_LIST_REQUEST,
    QUERY_DISCOUNT_PRODUCT_LIST_SUCCESS,
    QUERY_DISCOUNT_PRODUCT_LIST_FAILURE,
} = require('../../constants/actionTypes').default;


export function queryDiscountProductListRequest() {
    return {
        type: QUERY_DISCOUNT_PRODUCT_LIST_REQUEST,
    }
}

export function queryDiscountProductListSuccess(json) {
    return {
        type: QUERY_DISCOUNT_PRODUCT_LIST_SUCCESS,
        payload: json
    }
}

export function queryDiscountProductListFailure(error) {
    return {
        type: QUERY_DISCOUNT_PRODUCT_LIST_FAILURE,
        payload: error
    }
}

/*
 * 限时热促商品列表
 */
export function getDiscountProductList() {
    return (dispatch, getState) => {
        let {app, discountProduct} = getState();
        let {isFetching, endReached, currentPage, pageSize, type} = discountProduct
        if (isFetching || endReached) {
            return;
        }

        let channel = app.channel;
        let page = currentPage + 1;

        dispatch(queryDiscountProductListRequest());

        return new DiscountProductService(app.host).fetchDiscountProductList(type, channel, pageSize, page)
            .then(json => {
                let payload = {}
                if (json.page > 1) {
                    let oldList = discountProduct.get('list');
                    let newList = [...oldList, ...(json.product_list != null ? json.product_list.map(item=>Immutable.fromJS(item)) : [])];

                    payload.list = newList;
                } else {
                    payload.list = json.product_list != null ? json.product_list.map(item=>Immutable.fromJS(item)) : [];
                }
                payload.endReached = (payload.list.length == 0) || (json.page == json.page_total);
                payload.currentPage = json.page;
                dispatch(queryDiscountProductListSuccess(payload));
            })
            .catch(error => {
                dispatch(queryDiscountProductListFailure(error));
            });
    };
}