const url = '/';

function getCookie(cname) {
    let name = cname + "=";
    let decodedCookie = decodeURIComponent(document.cookie);
    let ca = decodedCookie.split(';');
    for (let i = 0; i < ca.length; i++) {
        let c = ca[i];
        while (c.charAt(0) == ' ') {
            c = c.substring(1);
        }
        if (c.indexOf(name) == 0) {
            return c.substring(name.length, c.length);
        }
    }
    return "";
}

function sendRequest(api, method, param, callback, errorCallback) {
    let _url = url;
    let path;
    const token = getCookie('token');
    const beforeSend = function (xhr) {
        if (token) {
            xhr.setRequestHeader('Authorization', `${token}`);
        }
    }

    const success = function (response) {
        callback(response.data);
    }

    const error = function (jqXHR, exception) {
        var msg = '';
        if (jqXHR.status === 0) {
            msg = 'Not connect.\n Verify Network.';
        } else if (jqXHR.status == 404) {
            msg = 'Requested page not found. [404]';
        } else if (jqXHR.status == 500) {
            msg = 'Internal Server Error [500].';
        } else if (jqXHR.status == 401 || jqXHR.status == 403) {
            msg = 'Forbidden [' + jqXHR.status + '].';
        } else if (exception === 'parsererror') {
            msg = 'Requested JSON parse failed.';
        } else if (exception === 'timeout') {
            msg = 'Time out error.';
        } else if (exception === 'abort') {
            msg = 'Ajax request aborted.';
        } else {
            msg = '';
            try {
                let obj;
                //check for string json
                let str = jqXHR.responseText;
                if (str.indexOf('"{\\') === 0) {
                    str = str.replace(/\\/g, "");
                    if (str && str.charAt(str.length - 1) === ',') {
                        str = str.substring(1, str.length - 2);
                    } else {
                        str = str.substring(1, str.length - 1);
                    }
                    obj = JSON.parse(str);
                } else {
                    obj = JSON.parse(JSON.stringify(jqXHR.responseJSON));
                }

                //check for error message
                if (obj['message']) {
                    msg = obj['message'];
                } else {
                    for (let key in obj) {
                        if (typeof obj[key] === 'string') {
                            msg += obj[key] + '\n';
                        } else if (Array.isArray(obj[key])) {
                            msg += obj[key].toString() + '\n';
                        }
                    }
                }
            } catch (error) {
                console.log(error);
                msg = jqXHR.responseText;
            }
        }
        errorCallback(msg);
    }

    const opt = {
        type: method,
        url: _url + 'api/' + api,
        contentType: 'application/json; charset=utf-8',
        dataType: 'json',
        data: param ? JSON.stringify(param) : '',
        beforeSend,
        success,
        error,
    }

    if (param instanceof FormData) {
        opt['cache'] = false;
        opt['contentType'] = false;
        opt['processData'] = false;
        opt['data'] = param;
        if (method === 'PUT') {
            opt['type'] = 'POST';
            param.append('_method', 'PUT');
        }
    } else {
        opt['data'] = param ? JSON.stringify(param) : '';
    }

    $.ajax(opt);

}
function getData(api, param, callback, errorCallback) {
    sendRequest(api, 'GET', param, callback, errorCallback);
}
function postData(api, param, callback, errorCallback) {
    sendRequest(api, 'POST', param, callback, errorCallback);
}
function putData(api, param, callback, errorCallback) {
    sendRequest(api, 'PUT', param, callback, errorCallback);
}
function delData(api, param, callback, errorCallback) {
    sendRequest(api, 'DELETE', param, callback, errorCallback);
}

function loadPicture(api, callback, errorCallback) {

    let _url = url;
    let path;
    const token = localStorage.getItem('token');

    const beforeSend = function (xhr) {
        if (token) {
            xhr.setRequestHeader('Authorization', `${token}`);
        }
    }

    const success = function (response) {
        callback(response.data);
    }

    $.ajax({
        url: _url + 'api/' + api,
        cache: false,
        xhr: function () {// Seems like the only way to get access to the xhr object
            var xhr = new XMLHttpRequest();
            xhr.responseType = 'blob'
            return xhr;
        },
        success: function (data) {
            var url = window.URL || window.webkitURL;
            callback(url.createObjectURL(data));
        },
        error: function () {
            errorCallback();
        }
    });
}