using Newtonsoft.Json;
using RestSharp;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;

namespace Xylem.Common.Logic.SoftwareAccessHelper
{
    /// <summary>
    /// Web request
    /// </summary>
    public static class LocalWebRequest
    {
        /// <summary>
        /// Web request with asynchronous operation and response code or exception response, json object input and/or dictionary
        /// </summary>
        /// <param name="url"></param>
        /// <param name="responseCode"></param>
        /// <param name="ex"></param>
        /// <param name="timeoutMs"></param>
        /// <param name="json"></param>
        /// <param name="header"></param>
        /// <returns></returns>
        public static Boolean PostRequestAsync(String url, ref Int32 responseCode, ref Exception ex, Int32? timeoutMs = null, Object json = null, Dictionary<String, String> header = null)
        {
            try
            {
                var r = PostRequestAndGetResponseAsync(url, timeoutMs, json, header);
                responseCode = r.StatusCode.GetHashCode();
                if (r.StatusCode == HttpStatusCode.OK)
                {
                    return true;
                }
                if (r.StatusCode == HttpStatusCode.InternalServerError)
                {
                    ex = new Exception(r.Content);
                }

            }
            catch (Exception error)
            {
                ex = error;
            }
            return false;

        }

        /// <summary>
        /// Web request with asynchronous operation and true/false return, json object input and/or dictionary
        /// </summary>
        /// <param name="url"></param>
        /// <param name="timeoutMs"></param>
        /// <param name="json"></param>
        /// <param name="header"></param>
        /// <returns></returns>
        public static Boolean PostRequestAsync(String url, Int32? timeoutMs = null, Object json = null, Dictionary<String, String> header = null)
        {
            try
            {
                var r = PostRequestAndGetResponseAsync(url, timeoutMs, json, header);
                if (r.StatusCode == HttpStatusCode.OK)
                {
                    return true;
                }

            }
            catch (Exception)
            {
                // Log
            }
            return false;

        }
        /// <summary>
        /// Web request with asynchronous operation with string return, json object input and/or dictionary
        /// </summary>
        /// <param name="url"></param>
        /// <param name="timeoutMs"></param>
        /// <param name="json"></param>
        /// <param name="header"></param>
        /// <returns></returns>
        public static String PostRequestAsyncAndGetContent(String url, Int32? timeoutMs = null, Object json = null, Dictionary<String, String> header = null)
        {
            try
            {
                var r = PostRequestAndGetResponseAsync(url, timeoutMs, json, header);
                if (r.StatusCode == HttpStatusCode.OK)
                {
                    return r.Content;
                }

            }
            catch (Exception)
            {
                // Log
            }
            return string.Empty;

        }

        /// <summary>
        /// Web request with asynchronous operation, binary file byte array input, response string output
        /// </summary>
        /// <param name="url"></param>
        /// <param name="fileName"></param>
        /// <param name="content"></param>
        /// <param name="response"></param>
        /// <param name="timeoutMs"></param>
        /// <returns></returns>
        public static Boolean PostBinaryFileRequestAsync(String url, String fileName, Byte[] content, out String response, Int32? timeoutMs = null)
        {
            try
            {

                var client = new RestClient(url);
                //WebRequest.DefaultWebProxy = null;
                var request = new RestRequest(Method.POST);

                ServicePointManager.Expect100Continue = false;
         

                request.AddHeader("Content-Type", "multipart/form-data");


                request.Files.Add(new FileParameter
                {
                    Name = "file",
                    Writer = (s) => {
                        var stream = new MemoryStream(content);
                        stream.CopyTo(s);
                        stream.Dispose();
                    },
                    FileName = fileName,
                    ContentType = "multipart/form-data",
                    ContentLength = content.Length
                });


                var r = client.ExecuteAsPost(request, Method.POST.ToString());
                response = r.Content;
                return r.StatusCode == HttpStatusCode.OK;


            }
            catch (Exception)
            {
                response = string.Empty;
                return false;

            }

        }

        /// <summary>
        /// Web request with asynchronous operation, binary file input
        /// </summary>
        /// <param name="url"></param>
        /// <param name="fileName"></param>
        /// <param name="content"></param>
        /// <param name="timeoutMs"></param>
        /// <returns></returns>
        public static Boolean PostBinaryFileRequestAsync(String url, String fileName, Byte[] content, Int32? timeoutMs = null)
        {
            try
            {

                var client = new RestClient(url);
               // WebRequest.DefaultWebProxy = null;
                var request = new RestRequest(Method.POST);

                ServicePointManager.Expect100Continue = false;

               
                request.AddHeader("Content-Type", "multipart/form-data");


                request.Files.Add(new FileParameter
                {
                    Name = "file",
                    Writer = (s) => {
                        var stream = new MemoryStream(content);
                        stream.CopyTo(s);
                        stream.Dispose();
                    },
                    FileName = fileName,
                    ContentType = "multipart/form-data",
                    ContentLength = content.Length
                });


                var r = client.ExecuteAsPost(request, Method.POST.ToString());
                return r.StatusCode == HttpStatusCode.OK;


            }
            catch (Exception)
            {
                return false;

            }

        }


        /// <summary>
        /// Web request with asynchronous operation 
        /// </summary>
        /// <param name="url"></param>
        /// <param name="timeoutMs"></param>
        /// <param name="files"></param>
        /// <param name="header"></param>
        /// <returns></returns>
        public static IRestResponse PostBinaryRequestAndGetResponseAsync(String url, Int32? timeoutMs = null,
            Dictionary<String, String> files = null, Dictionary<String, String> header = null)
        {
            try
            {

                var client = new RestClient(url);
                //WebRequest.DefaultWebProxy = null;
                var request = new RestRequest(Method.POST);

                ServicePointManager.Expect100Continue = false;

                if (header != null)
                {
                    foreach (var item in header)
                    {
                        if (item.Key != "Content-Type" && item.Key != "Accept")
                        {
                            request.AddHeader(item.Key, item.Value);
                        }

                    }

                }

                request.AddHeader("Content-Type", "multipart/form-data");

                if (files != null)
                {
                    foreach (var item in files)
                    {
                        request.AddFile(item.Key, item.Value);
                    }

                }

                var r = client.ExecuteAsPost(request, Method.POST.ToString());
                return r;


            }
            catch (Exception error)
            {
                return new RestResponse
                {
                    StatusCode = HttpStatusCode.InternalServerError,
                    Content = error.ToString()
                };

            }

        }

        /// <summary>
        /// Web request with asynchronous operation
        /// </summary>
        /// <param name="url"></param>
        /// <param name="timeoutMs"></param>
        /// <param name="json"></param>
        /// <param name="header"></param>
        /// <returns></returns>
        public static IRestResponse PostRequestAndGetResponseAsync(String url, Int32? timeoutMs = null, Object json = null, 
            Dictionary<String, String> header = null)
        {
            try
            {

                var client = new RestClient(url);
                //WebRequest.DefaultWebProxy = null;
                ServicePointManager.Expect100Continue = false;
                var request = new RestRequest(Method.POST);

                
                if (header != null)
                {
                    foreach (var item in header)
                    {
                        if (item.Key != "Content-Type" && item.Key != "Accept")
                        {
                            request.AddHeader(item.Key, item.Value);
                        }

                    }

                }


                request.AddHeader("Content-Type", "application/json");
                request.AddHeader("Accept", "application/json");

                if (json != null)
                {
                    request.AddJsonBody(json);
                }

                var r = client.ExecuteAsPost(request, Method.POST.ToString());
                return r;


            }
            catch (Exception error)
            {
                return new RestResponse
                {
                    StatusCode = HttpStatusCode.InternalServerError,
                    Content = error.ToString()
                };

            }

        }

        #region HTTP String extensions
        public static HttpResponse<T> DeleteAsJson<T>(this String url, Object json = null, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.DELETE.AsJson<T>(url, headersHandler, json, timeoutMs);
        }

        public static HttpResponse<T> GetAsJson<T>(this String url, Object json = null, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.GET.AsJson<T>(url, headersHandler, json, timeoutMs);
        }

        public static HttpResponse<T> PostAsJson<T>(this String url, Object json = null, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.POST.AsJson<T>(url, headersHandler, json, timeoutMs);
        }

        public static HttpResponse<T> PutAsJson<T>(this String url, Object json = null, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.PUT.AsJson<T>(url, headersHandler, json, timeoutMs);
        }
        #endregion HTTP String extensions

        #region HTTP Object extensions
        public static HttpResponse<T> DeleteAsJson<T>(this Object json, String url, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.DELETE.AsJson<T>(url, headersHandler, json, timeoutMs);
        }

        public static HttpResponse<T> GetAsJson<T>(this Object json, String url, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.GET.AsJson<T>(url, headersHandler, json, timeoutMs);
        }

        public static HttpResponse<T> PostAsJson<T>(this Object json, String url, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.POST.AsJson<T>(url, headersHandler, json, timeoutMs);
        }

        public static HttpResponse<T> PutAsJson<T>(this Object json, String url, Action<RestRequestHeaders> headersHandler = null, Int32? timeoutMs = null)
        {
            return Method.PUT.AsJson<T>(url, headersHandler, json, timeoutMs);
        }
        #endregion HTTP Object extensions

        /// <summary>
        /// Web request
        /// </summary>
        /// <param name="url"></param>
        /// <param name="timeoutMs"></param>
        /// <param name="header"></param>
        /// <param name="isRetry"></param>
        /// <returns></returns>
        public static String GetRequest(String url, Int32? timeoutMs = null, Dictionary<String, String> header = null, Boolean isRetry = false)
        {
            Int32 temp;
            var ret =  GetRequestWithError(url, out temp,  timeoutMs, header, isRetry);
            if (temp != 200)
            {
                throw new ApplicationException($"WebRequest Status {temp}");
            }
            return ret;
        }

        /// <summary>
        /// Web request with asynchronous operation, error code response
        /// </summary>
        /// <param name="url"></param>
        /// <param name="errorCode"></param>
        /// <param name="timeoutMs"></param>
        /// <param name="header"></param>
        /// <param name="isRetry"></param>
        /// <returns></returns>
        public static String GetRequestWithError(String url, out Int32 errorCode, Int32? timeoutMs = null, Dictionary<String, String> header = null, Boolean isRetry = false)
        {

            var client = new RestClient(url);
            //WebRequest.DefaultWebProxy = null;
            var request = new RestRequest(Method.GET);
            ServicePointManager.Expect100Continue = false;
            if (!timeoutMs.HasValue)
            {
                timeoutMs = 800;
            }

            request.Timeout = timeoutMs.Value;

            if (header != null)
            {
                foreach (var item in header)
                {
                    if (item.Key != "Accept")
                    {
                        request.AddHeader(item.Key, item.Value);
                    }

                }

            }
            request.AddHeader("Accept", "application/json");

            var r = client.Get(request);
            errorCode = r.StatusCode.GetHashCode();
            if (r.StatusCode == HttpStatusCode.OK)
            {
                return r.Content;
            }

            if (r.StatusCode != 0) return r.Content;

            // Changed logic as it seems to be an endless loop THW 25-Mar-2021
            //if (presult.Status == IPStatus.Success || !isRetry)
            if (!isRetry)
            {
                return GetRequest(url, timeoutMs, header, true);
            }
            // Removed throwing of exception as the caller cannot evaluate the result THW 25-Mar-2021
            //throw new ApplicationException($"Timeout {   r.StatusDescription} {Environment.NewLine} PingState: {presult.Status} {Environment.NewLine} RoundtripTime: {presult.RoundtripTime}  ");
            return r.Content;
        }

        private static HttpResponse<T> AsJson<T>(this Method method, String url, Action<RestRequestHeaders> headersHandler = null, Object model = null, Int32? timeoutMs = null)
        {
            var httpResponse = new HttpResponse<T>();
            var response = default(IRestResponse);

            try
            {
                var client = new RestClient(url);
                var request = new RestRequest(method);
                var headers = new RestRequestHeaders(request)
                {
                    ContentType = "application/json",
                    Accept = "application/json"
                };

                headersHandler?.Invoke(headers);

                if (model != null)
                {
                    if (method == Method.GET)
                    {
                        request.AddObject(model);
                    }
                    else
                    {
                        request.AddJsonBody(model);
                    }
                }

                ServicePointManager.Expect100Continue = false;
                
                response = client.Execute(request);
                httpResponse.HttpStatusCode = response.StatusCode;

                if (HttpStatusCode.OK <= response.StatusCode && response.StatusCode < HttpStatusCode.BadRequest)
                {
                    if (!string.IsNullOrWhiteSpace(response.Content))
                    {
                        httpResponse.Value = JsonConvert.DeserializeObject<T>(response.Content);
                    }
                    else
                    {
                        httpResponse.Errors = new Dictionary<String, String>()
                        {
                            { nameof(response.Content), $"{response.Content}" },
                        };
                    }
                }
                else
                {
                    httpResponse.Errors = JsonConvert.DeserializeObject<Dictionary<String, String>>(response.Content);

                    if (httpResponse.Errors is null)
                    {
                        httpResponse.Errors = new Dictionary<String, String>()
                        {
                            { nameof(response.ErrorException), $"{response.ErrorException}" },
                            { nameof(response.ErrorMessage), $"{response.ErrorMessage}" },
                            { nameof(response.Content), $"{response.Content}" },
                        };
                    }
                }
            }
            catch (Exception error)
            {
                httpResponse.HttpStatusCode = HttpStatusCode.InternalServerError;
                httpResponse.Errors = new Dictionary<String, String>()
                {
                    { nameof(Exception), $"{error}" }
                };
            }

            return httpResponse;
        }
    }
}