const validateName = (name: string) => {
    if((name + "").length > 2) {
      return true;
    }
    return false;
}

function isJsonString(str: string) {
    try {
        JSON.parse(str);
    } catch (e) {
        return false;
    }
    return true;
}

function readCookie(key: string) {
    let name = key + "=";
    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 "";
}

async function callApi(url: string, data: string, authorization: any) {

    return new Promise((resolve: any) => {

        const jsonData = JSON.stringify(data);
        var xhr = new XMLHttpRequest();
        xhr.addEventListener("readystatechange", () => {
            if(xhr != null) {
                if(xhr.readyState === 4) {
                    resolve(xhr);
                }
            }
        });
        xhr.open("POST", url);
        xhr.setRequestHeader("Content-Type", "application/json");
        xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest'); 
        if(authorization != null) {
            xhr.setRequestHeader('Authorization', 'Basic ' + authorization);
        }
        xhr.send(jsonData);

        return xhr;

    })

}

async function replaceElement(element: any) {
    var old_element = element;
    var new_element = old_element.cloneNode(true);
    old_element.parentNode.replaceChild(new_element, old_element);
    return new_element;
}

function getDayMonthYear(d: Date) {
    let month = '' + (d.getMonth() + 1);
    let day = '' + d.getDate();
    let year = d.getFullYear();
    
    if (month.length < 2) 
        month = '0' + month;
    if (day.length < 2) 
        day = '0' + day;
    return [day, month, year]
}

function timeSince(date:number) {
    let originalSeconds = Math.floor((new Date().getTime() - date) / 1000);
    var seconds = originalSeconds;
  
    var interval = Math.floor(seconds / 31536000);
    let returnstr = ""
    if (interval >= 1) {
      returnstr += Math.floor(interval) + (Math.floor(interval) == 1 ? " yr " : " yrs ");
      seconds = seconds - (interval * 31536000) 
    }
    interval = Math.floor(seconds / 2592000);
    if (interval >= 1) {
      returnstr += Math.floor(interval) + (Math.floor(interval) == 1 ? " mth " : " mths ");
      seconds = seconds - (interval * 2592000)
    }
    if(originalSeconds >= 31536000){
        return returnstr;
    }
    interval = Math.floor(seconds / 86400);
    if (interval >= 1) {
      returnstr += Math.floor(interval) + (Math.floor(interval) == 1 ? " day " : " days ");
      seconds = seconds - (interval * 86400)
    }
    if(originalSeconds >= 2592000){
        return returnstr;
    }
    console.log('ago', seconds, interval, Math.floor((new Date().getTime() - date) / 1000))
    interval = Math.floor(seconds / 3600);
    if (interval >= 1) {
      returnstr += Math.floor(interval) + (Math.floor(interval) == 1 ? " hr " : " hrs ");
      seconds = seconds - (interval * 3600)
    }
    if(originalSeconds >= 86400){
        return returnstr;
    }
    interval = Math.floor(seconds / 60);
    if (interval >= 1) {
      returnstr += Math.floor(interval) + (Math.floor(interval) == 1 ? " min " : " mins ");
      seconds = seconds - (interval * 60)
    }
    if(originalSeconds >= 3600){
        return returnstr;
    }
    if(seconds > 0){
        returnstr += Math.floor(seconds) + (Math.floor(seconds) == 1 ? " sec " : " seconds ");
    }
    return returnstr;
  }

const exportFunctions = {
   callApi, validateName, readCookie, replaceElement, getDayMonthYear, isJsonString, timeSince
};

export default exportFunctions;