using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace VOL.Core.Utilities
{
    public class HttpManager
    {
        public static Task<string> HttpPostAsync(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            if (!string.IsNullOrEmpty(contentType))
            {
                request.ContentType = contentType;
            }
            if (headers != null)
            {
                foreach (var header in headers)
                    request.Headers[header.Key] = header.Value;
            }

            try
            {
                byte[] bytes = Encoding.UTF8.GetBytes(postData ?? "");
                using (Stream sendStream = request.GetRequestStream())
                {
                    sendStream.Write(bytes, 0, bytes.Length);
                }

                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {
                    Stream responseStream = response.GetResponseStream();
                    StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
                    return streamReader.ReadToEndAsync();
                }
            }
            catch (Exception ex)
            {
                return Task.FromResult(ex.Message);
            }

        }
        public static  Task<string> HttpGetAsync(string url, Dictionary<string, string> headers = null)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                if (headers != null)
                {
                    foreach (var header in headers)
                        request.Headers[header.Key] = header.Value;
                }
                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {
                    Stream responseStream = response.GetResponseStream();
                    StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
                    return streamReader.ReadToEndAsync();
                }
            }
            catch (Exception ex)
            {
                return Task.FromResult(ex.Message);
            }
        }
    }
}