using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Business.Core.Utilities
{
    public class HttpHelper
    {/// <summary>
     /// 发起POST同步请求
     /// 
     /// </summary>
     /// <param name="url"></param>
     /// <param name="postData"></param>
     /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
     /// <param name="headers">填充消息头</param>        
     /// <returns></returns>
        public static string HttpPost(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
    {
        public static string HttpGet(string url, Dictionary<string, string>? headers = null)
        {
            HttpClient client = new HttpClient();
            if (headers != null)
            {
                foreach (var header in headers)
                {
                    client.DefaultRequestHeaders.Add(header.Key, header.Value);
                }
                using (HttpContent httpContent = new StringContent(postData, Encoding.UTF8))
                {
                    if (contentType != null)
                        httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);

                    HttpResponseMessage response = client.PostAsync(url, httpContent).Result;
                    return response.Content.ReadAsStringAsync().Result;
            }
            try
            {
                byte[] resultBytes = client.GetByteArrayAsync(url).Result;
                return Encoding.UTF8.GetString(resultBytes);
            }
            catch
            {
                return string.Empty;
            }
        }

        public static string HttpPost(string url, string postData, Dictionary<string, string>? headers = null, string contentType = "", int timeout = 0, Encoding? encoding = null)
        {
            HttpClient client = new HttpClient();
            if (headers != null)
            {
                foreach (var header in headers)
                {
                    client.DefaultRequestHeaders.Add(header.Key, header.Value);
                }
                HttpResponseMessage response = client.GetAsync(url).Result;
                return response.Content.ReadAsStringAsync().Result;
            }
            }
            HttpContent content = new StringContent(postData ?? "", encoding ?? Encoding.UTF8);
            if (!string.IsNullOrWhiteSpace(contentType))
            {
                content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);
            }
            try
            {
                using HttpResponseMessage responseMessage = client.PostAsync(url, content).Result;
                byte[] resultBytes = responseMessage.Content.ReadAsByteArrayAsync().Result;
                return Encoding.UTF8.GetString(resultBytes);
            }
            catch
            {
                return string.Empty;
            }
        }
    }
}