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

namespace AllBase.Helper
{
    public class CommonSimRequest
    {
        public string Accept { get; set; } = "application/json, text/plain, */*";
        public string ContentType { get; set; } = "application/x-www-form-urlencoded";
        public string UserAgent { get; set; } = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.79 Safari/537.36";
        public Encoding Encoding { get; set; } = Encoding.UTF8;

        public string Request_Get(string url, string referer, Dictionary<string, string> headers, string cookies)
        {
            HttpWebResponse response = null;
            string responseText = "";
            if (headers == null)
                headers = new Dictionary<string, string>();

            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

                request.KeepAlive = true;
                request.Accept = Accept;
                request.UserAgent = UserAgent;
                request.ContentType = ContentType;
                foreach (var key in headers.Keys)
                {
                    request.Headers.Add(key, headers[key]);
                }
                request.Referer = referer;
                request.Headers.Set(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
                request.Headers.Set(HttpRequestHeader.AcceptLanguage, "en-US,en;q=0.9");
                request.Headers.Set(HttpRequestHeader.Cookie, cookies);

                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException e)
            {
                if (e.Status == WebExceptionStatus.ProtocolError) response = (HttpWebResponse)e.Response;
                else responseText = "error," + e.Message;
            }
            catch (Exception ex)
            {
                responseText = "error," + ex.Message;
            }
            if (response != null)
            {
                if (string.IsNullOrEmpty(responseText))
                    responseText = ReadResponse(response, this.Encoding);
                response.Close();
            }

            return responseText;
        }

        public string Request_Post(string url, string referer, Dictionary<string, string> headers, string cookies, string data, bool isSetCommonHeaders = true)
        {
            HttpWebResponse response = null;
            string responseText = "";
            if (headers == null)
                headers = new Dictionary<string, string>();

            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

                request.KeepAlive = true;
                request.Accept = Accept;
                request.UserAgent = UserAgent;
                request.ContentType = ContentType;
                if (isSetCommonHeaders)
                {
                    if (!headers.Keys.Contains("Origin"))
                        request.Headers.Add("Origin", @"https://fxg.jinritemai.com/");
                }
                foreach (var key in headers.Keys)
                {
                    request.Headers.Add(key, headers[key]);
                }
                request.Referer = referer;
                request.Headers.Set(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
                request.Headers.Set(HttpRequestHeader.AcceptLanguage, "en-US,en;q=0.9");
                request.Headers.Set(HttpRequestHeader.Cookie, cookies);

                request.Method = "POST";
                request.ServicePoint.Expect100Continue = false;

                string body = data;
                byte[] postBytes = Encoding.UTF8.GetBytes(body);
                request.ContentLength = postBytes.Length;
                Stream stream = request.GetRequestStream();
                stream.Write(postBytes, 0, postBytes.Length);
                stream.Close();

                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException e)
            {
                if (e.Status == WebExceptionStatus.ProtocolError) response = (HttpWebResponse)e.Response;
                else responseText = "error," + e.Message;
            }
            catch (Exception ex)
            {
                responseText = "error," + ex.Message;
            }
            if (response != null)
            {
                if (string.IsNullOrEmpty(responseText))
                    responseText = ReadResponse(response, this.Encoding);
                response.Close();
            }

            return responseText;
        }

        public string Request_PostByBigLength(string url, string referer, Dictionary<string, string> headers, string cookies, string data, bool AcceptEncoding = true, bool isSetCommonHeaders = true)
        {
            HttpWebResponse response = null;
            string responseText = "";
            if (headers == null)
                headers = new Dictionary<string, string>();

            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

                request.KeepAlive = true;
                request.Accept = Accept;
                request.UserAgent = UserAgent;
                request.UserAgent = AllBase.BaseClass.ChromeUserAgent;
                request.ContentType = ContentType;
                if (isSetCommonHeaders)
                {
                    if (!headers.Keys.Contains("Origin"))
                        request.Headers.Add("Origin", @"https://fxg.jinritemai.com");
                }
                foreach (var key in headers.Keys)
                {
                    request.Headers.Add(key, headers[key]);
                }
                request.Referer = referer;
                if (AcceptEncoding)
                    request.Headers.Set(HttpRequestHeader.AcceptEncoding, "deflate");
                else
                    request.Headers.Set(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
                request.Headers.Set(HttpRequestHeader.AcceptLanguage, "zh-CN,zh;q=0.9");
                request.Headers.Set(HttpRequestHeader.Cookie, cookies);

                request.Method = "POST";
                request.ServicePoint.Expect100Continue = false;

                string body = data;
                byte[] postBytes = Encoding.UTF8.GetBytes(body);
                request.ContentLength = postBytes.Length;
                Stream stream = request.GetRequestStream();
                stream.Write(postBytes, 0, postBytes.Length);
                stream.Close();

                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException e)
            {
                if (e.Status == WebExceptionStatus.ProtocolError) response = (HttpWebResponse)e.Response;
                else responseText = "error," + e.Message;
            }
            catch (Exception ex)
            {
                responseText = "error," + ex.Message;
            }
            if (response != null)
            {
                if (string.IsNullOrEmpty(responseText))
                    responseText = ReadResponse(response, this.Encoding);
                response.Close();
            }

            return responseText;
        }

        /// <summary>
        /// 读取返回值
        /// </summary>
        /// <param name="response"></param>
        /// <returns></returns>
        public static string ReadResponse(HttpWebResponse response, Encoding encoding = null)
        {
            if (encoding == null)
                encoding = Encoding.UTF8;
            using (Stream responseStream = response.GetResponseStream())
            {
                Stream streamToRead = responseStream;
                if (response.ContentEncoding.ToLower().Contains("gzip"))
                {
                    streamToRead = new GZipStream(streamToRead, CompressionMode.Decompress);
                }
                else if (response.ContentEncoding.ToLower().Contains("deflate"))
                {
                    streamToRead = new DeflateStream(streamToRead, CompressionMode.Decompress);
                }

                using (StreamReader streamReader = new StreamReader(streamToRead, encoding))
                {
                    return streamReader.ReadToEnd();
                }
            }
        }
    }
}