using System;
using System.Collections.Generic;
using System.Net.Http;
using Newtonsoft.Json;

namespace LCU.Library.Internal.CoreApiWrapperLib.Utilities
{
    public static class HttpUtilities
    {
        private const int ParamCounterDefault = 1;

        public static HttpClient GetClient(Uri uri)
        {
            var handler = new HttpClientHandler
            {
                SslProtocols = System.Security.Authentication.SslProtocols.Tls12 |
                               System.Security.Authentication.SslProtocols.Tls11 |
                               System.Security.Authentication.SslProtocols.Tls,
                ServerCertificateCustomValidationCallback = (sender, cert, chain, sslPolicyErrors) => true
            };

            var httpClient = new HttpClient(handler)
            {
                Timeout = TimeSpan.FromSeconds(60),
                BaseAddress = uri
            };
            return httpClient;
        }

        public static Uri BuildHttpsUri(string hostName, string endpoint)
        {
            return new Uri($"https://{hostName}{endpoint}");
        }

        public static string BuildEndPointWithParams(string endpoint, Dictionary<string, string> parameters)
        {
            if(parameters == null || parameters.Count < 0)
            {
                return endpoint;
            }

            var counter = ParamCounterDefault;
            foreach (var key in parameters.Keys)
            {
                var splitter = counter == ParamCounterDefault ? "?" : "&";
                endpoint = $"{endpoint}{splitter}{key}={parameters[key]}";
                counter++;
            }

            return endpoint;
        }

        public static string ReplaceRootParameter(string endpoint, string placeholder, string value)
        {
            return endpoint.Replace(placeholder, value);
        }

        public static Dictionary<string, string> BuildDictionaryOfNonNullValues<T>(T model)
        {
            var bodyParams = new Dictionary<string, string>();
            var modelType = typeof(T);
            var properties = modelType.GetProperties();

            foreach (var property in properties)
            {
                var fieldValue = model.GetType().GetProperty(property.Name).GetValue(model, null);
                if (fieldValue != null)
                {
                    bodyParams.Add(property.Name, fieldValue.ToString());
                }
            }

            return bodyParams;
        }

        public static string BuildJsonOfNonNullProperties<T>(T model)
        {
            var bodyParams = BuildDictionaryOfNonNullValues(model);

            if (bodyParams.Count <= 0)
            {
                return "";
            }

            return JsonConvert.SerializeObject(bodyParams);
        }

        
    }
}