using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

namespace TelpoPush.Common
{ 
    /// <summary>
    /// HTTP帮助类
    /// </summary>
    public class HttpHelperAsync
    {
        private IHttpClientFactory _httpClientFactory;
        private readonly ILogger<HttpHelperAsync> _logger;
        public HttpHelperAsync(IHttpClientFactory httpClientFactory, ILogger<HttpHelperAsync> logger)
        {
            _httpClientFactory = httpClientFactory;
            _logger = logger;
        }


        #region  异步
        /// <summary>
        /// 发起POST异步请求表单
        /// </summary>
        /// <param name="url">请求地址</param>
        /// <param name="body">POST提交的内容</param>
        /// <param name="bodyMediaType">POST内容的媒体类型，如：application/xml、application/json</param>
        /// <param name="responseContentType">HTTP响应上的content-type内容头的值,如：application/xml、application/json、application/text、application/x-www-form-urlencoded等</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回string</returns>
        public async Task<string> PostFormAsync(string url, MultipartFormDataContent content,
            Dictionary<string, string> headers = null,
            int timeOut = 5)
        {
            try
            {
                var hostName = GetHostName(url);
                using (HttpClient client = _httpClientFactory.CreateClient(hostName))
                {
                    client.Timeout = TimeSpan.FromSeconds(timeOut);
                    if (headers?.Count > 0)
                    {
                        foreach (string key in headers.Keys)
                        {
                            client.DefaultRequestHeaders.Add(key, headers[key]);
                        }
                    }
                    content.Headers.Add("ContentType", "multipart/form-data");//声明头部
                    using (HttpResponseMessage response = await client.PostAsync(url, content))
                    {
                        return JsonConvert.SerializeObject(new { response.IsSuccessStatusCode, response.StatusCode });
                        //if (response.IsSuccessStatusCode)
                        //{
                        //    string responseString = await response.Content.ReadAsStringAsync();
                        //    return responseString;
                        //}
                        //else
                        //{
                        //    return string.Empty;
                        //}
                    }
                }
            }
            catch (Exception ex)
            {
                return $"推送完成:请求响应超过{timeOut}秒,异常 {ex.Message}";
            }
        }



        /// <summary>
        /// 发起GET异步请求
        /// </summary>
        /// <typeparam name="T">返回类型</typeparam>
        /// <param name="url">请求地址</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回string</returns>
        public async Task<string> GetAsync(string url, Dictionary<string, string> headers = null, int timeOut = 30)
        {
            var hostName = GetHostName(url);
            using (HttpClient client = _httpClientFactory.CreateClient(hostName))
            {
                client.Timeout = TimeSpan.FromSeconds(timeOut);
                if (headers?.Count > 0)
                {
                    foreach (string key in headers.Keys)
                    {
                        client.DefaultRequestHeaders.Add(key, headers[key]);
                    }
                }
                using (HttpResponseMessage response = await client.GetAsync(url))
                {
                    if (response.IsSuccessStatusCode)
                    {
                        string responseString = await response.Content.ReadAsStringAsync();
                        return responseString;
                    }
                    else
                    {
                        return string.Empty;
                    }
                }
            }
        }


        /// <summary>
        /// 发起POST异步请求
        /// </summary>
        /// <param name="url">请求地址</param>
        /// <param name="body">POST提交的内容</param>
        /// <param name="bodyMediaType">POST内容的媒体类型，如：application/xml、application/json</param>
        /// <param name="responseContentType">HTTP响应上的content-type内容头的值,如：application/xml、application/json、application/text、application/x-www-form-urlencoded等</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回string</returns>
        public async Task<string> PostAsync(string url, string body, 
            Dictionary<string, string> headers = null, 
            int timeOut = 30, 
            string bodyMediaType = "application/json",
            string responseContentType = "application/json;charset=utf-8")
        {

            //content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

            //var clientHandler = new HttpClientHandler
            //{
            //    ServerCertificateCustomValidationCallback = (message, certificate2, arg3, arg4) => true
            //};
            //using (var client = new HttpClient(clientHandler))
            //{
            //    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            try
            {
                var hostName = GetHostName(url);
                using (HttpClient client = _httpClientFactory.CreateClient(hostName))
                {
                    client.Timeout = TimeSpan.FromSeconds(timeOut);
                    if (headers?.Count > 0)
                    {
                        foreach (string key in headers.Keys)
                        {
                            client.DefaultRequestHeaders.Add(key, headers[key]);
                        }
                    }
                    StringContent content = new StringContent(body, System.Text.Encoding.UTF8, mediaType: bodyMediaType);
                    if (!string.IsNullOrWhiteSpace(responseContentType))
                    {
                        content.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse(responseContentType);
                    }
                    using (HttpResponseMessage response = await client.PostAsync(url, content))
                    {
                        if (response.IsSuccessStatusCode)
                        {
                            string responseString = await response.Content.ReadAsStringAsync();
                            return responseString;
                        }
                        else
                            return $"请求异常:{response.IsSuccessStatusCode},{response.StatusCode}";
                    }
                }
            }
            catch(Exception ex)
            {
                return $"请求异常:{ex.Message}";
            }
        }

        /// <summary>
        /// 发起POST异步请求
        /// </summary>
        /// <param name="url">请求地址</param>
        /// <param name="body">POST提交的内容</param>
        /// <param name="bodyMediaType">POST内容的媒体类型，如：application/xml、application/json</param>
        /// <param name="responseContentType">HTTP响应上的content-type内容头的值,如：application/xml、application/json、application/text、application/x-www-form-urlencoded等</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回string</returns>
        public async Task<string> PutAsync(string url, string body,
            string bodyMediaType = null,
            string responseContentType = null,
            Dictionary<string, string> headers = null,
            int timeOut = 30)
        {
            var hostName = GetHostName(url);
            using (HttpClient client = _httpClientFactory.CreateClient(hostName))
            {
                client.Timeout = TimeSpan.FromSeconds(timeOut);
                if (headers?.Count > 0)
                {
                    foreach (string key in headers.Keys)
                    {
                        client.DefaultRequestHeaders.Add(key, headers[key]);
                    }
                }
                StringContent content = new StringContent(body, System.Text.Encoding.UTF8, mediaType: bodyMediaType);
                if (!string.IsNullOrWhiteSpace(responseContentType))
                {
                    content.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse(responseContentType);
                }
                using (HttpResponseMessage response = await client.PutAsync(url, content))
                {
                    if (response.IsSuccessStatusCode)
                    {
                        string responseString = await response.Content.ReadAsStringAsync();
                        return responseString;
                    }
                    else
                    {
                        return string.Empty;
                    }
                }
            }
        }

        /// <summary>
        /// 发起GET异步请求
        /// </summary>
        /// <typeparam name="T">返回类型</typeparam>
        /// <param name="url">请求地址</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回string</returns>
        public async Task<string> DeleteAsync(string url, Dictionary<string, string> headers = null, int timeOut = 30)
        {
            var hostName = GetHostName(url);
            using (HttpClient client = _httpClientFactory.CreateClient(hostName))
            {
                client.Timeout = TimeSpan.FromSeconds(timeOut);
                if (headers?.Count > 0)
                {
                    foreach (string key in headers.Keys)
                    {
                        client.DefaultRequestHeaders.Add(key, headers[key]);
                    }
                }
                using (HttpResponseMessage response = await client.DeleteAsync(url))
                {
                    if (response.IsSuccessStatusCode)
                    {
                        string responseString = await response.Content.ReadAsStringAsync();
                        return responseString;
                    }
                    else
                    {
                        return string.Empty;
                    }
                }
            }
        }

        /// <summary>
        /// 发起GET异步请求
        /// </summary>
        /// <typeparam name="T">返回类型</typeparam>
        /// <param name="url">请求地址</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回T</returns>
        public async Task<T> GetAsync<T>(string url, Dictionary<string, string> headers = null, int timeOut = 30) where T : new()
        {
            string responseString = await GetAsync(url, headers, timeOut);
            if (!string.IsNullOrWhiteSpace(responseString))
            {
                return JsonConvert.DeserializeObject<T>(responseString);
            }
            else
            {
                return default(T);
            }
        }


        /// <summary>
        /// 发起POST异步请求
        /// </summary>
        /// <typeparam name="T">返回类型</typeparam>
        /// <param name="url">请求地址</param>
        /// <param name="body">POST提交的内容</param>
        /// <param name="bodyMediaType">POST内容的媒体类型，如：application/xml、application/json</param>
        /// <param name="responseContentType">HTTP响应上的content-type内容头的值,如：application/xml、application/json、application/text、application/x-www-form-urlencoded等</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回T</returns>
        public async Task<T> PostAsync<T>(string url, string body,
            Dictionary<string, string> headers = null, 
            int timeOut = 30, 
            string bodyMediaType = "application/json", 
            string responseContentType = "application/json;charset=utf-8"
        ) where T : new()
        {
            string responseString = await PostAsync(url, body, headers, timeOut, bodyMediaType, responseContentType);
            if (!string.IsNullOrWhiteSpace(responseString))
            {
                return JsonConvert.DeserializeObject<T>(responseString);
            }
            else
            {
                return default(T);
            }
        }

        /// <summary>
        /// 发起PUT异步请求
        /// </summary>
        /// <typeparam name="T">返回类型</typeparam>
        /// <param name="url">请求地址</param>
        /// <param name="body">POST提交的内容</param>
        /// <param name="bodyMediaType">POST内容的媒体类型，如：application/xml、application/json</param>
        /// <param name="responseContentType">HTTP响应上的content-type内容头的值,如：application/xml、application/json、application/text、application/x-www-form-urlencoded等</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回T</returns>
        public async Task<T> PutAsync<T>(string url, string body,
            string bodyMediaType = null,
            string responseContentType = null,
            Dictionary<string, string> headers = null,
            int timeOut = 30) where T : new()
        {
            string responseString = await PutAsync(url, body, bodyMediaType, responseContentType, headers, timeOut);
            if (!string.IsNullOrWhiteSpace(responseString))
            {
                return JsonConvert.DeserializeObject<T>(responseString);
            }
            else
            {
                return default(T);
            }
        }

        /// <summary>
        /// 发起DELETE异步请求
        /// </summary>
        /// <typeparam name="T">返回类型</typeparam>
        /// <param name="url">请求地址</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="timeOut">请求超时时间，单位秒</param>
        /// <returns>返回T</returns>
        public async Task<T> DeleteAsync<T>(string url, Dictionary<string, string> headers = null, int timeOut = 30) where T : new()
        {
            string responseString = await DeleteAsync(url, headers, timeOut);
            if (!string.IsNullOrWhiteSpace(responseString))
            {
                return JsonConvert.DeserializeObject<T>(responseString);
            }
            else
            {
                return default(T);
            }
        }
        #region 私有函数

        /// <summary>
        /// 获取请求的主机名
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        private static string GetHostName(string url)
        {
            if (!string.IsNullOrWhiteSpace(url))
            {
                return url.Replace("https://", "").Replace("http://", "").Split('/')[0];
            }
            else
            {
                return "AnyHost";
            }
        }

        #endregion


        #endregion

        #region  同步

        /// <summary>
        /// 发起GET同步请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="headers"></param>
        /// <param name="contentType"></param>
        /// <returns></returns>
        /// 


        public string HttpGet(string url, Dictionary<string, string> headers = null, string contentType = "application/json;charset=utf-8")
        {
            if (string.IsNullOrEmpty(url)) return "";
            try
            {
                using (HttpClient client = new HttpClient())
                {
                    if (contentType != null)
                        client.DefaultRequestHeaders.Add("ContentType", contentType);
                    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;
                }
            }
            catch (Exception ex)
            {
                _logger.LogDebug($"HttpGet/URL:{url},headers:{JsonConvert.SerializeObject(headers)},异常:{ex.Message}|{ex.Source}|{ex.StackTrace}");
            }
            return "";
        }
        /// <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 string HttpPost(string url, string postData = null, Dictionary<string, string> headers = null, string contentType = "application/json")
        {
            if (string.IsNullOrEmpty(url)) return "";
            try
            {
                postData = postData ?? "";
                using (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 MediaTypeHeaderValue(contentType);

                        HttpResponseMessage response = client.PostAsync(url, httpContent).Result;
                        return response.Content.ReadAsStringAsync().Result;
                    }
                }
            }
            catch  (Exception ex){
                _logger.LogDebug($"HttpPost/URL:{url},postStr:{postData},headers:{JsonConvert.SerializeObject(headers)},异常:{ex.Message}|{ex.Source}|{ex.StackTrace}");
            }
            return "";
        }
 

        #endregion
    }
}