let Promise = require('./zpromise');

const get = (url, header) => {
    header = header || {};
    return Ajax(url, 'GET', {}, header)
};

const post = (url, data, header) => {
    header = header || {};
    let formStr = '';
    let i = 0;
    for(let key in data) {
        if (i ++ > 0) formStr += '&';
        formStr += (key + '=' + data[key]);
    }
    header['Content-Type'] = 'application/x-www-form-urlencoded';
    return Ajax(url, 'POST', formStr, header)
};

const Ajax = (url, method, data, header) => {
    header = header || {};
    let token = cc.sys.localStorage.getItem('activity_token');
    if (token) {
        header['token'] = token;
    }
    return new Promise((resolve, reject) => {
        var xhr = new XMLHttpRequest();
        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4 ){
                if(xhr.status >= 200 && xhr.status < 400) {
                    resolve(JSON.parse(xhr.responseText));
                }else{
                    reject(xhr.statusText);
                }
            }
        };
        xhr.open(method, url, true);
        for(var key in header) {
            xhr.setRequestHeader(key, header[key]);
        }
        xhr.send(data);
    });

};

export default {
    get,
    post
}