using System;
using System.Text;
using Kreta.Web.Logging.Logger;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace Kreta.Web.Logger
{
    /// <summary>
    /// Logging field renderer
    /// </summary>
    class LoginRequestBodyRenderer : LoggingFieldRenderer
    {
        /// <summary>
        /// Secret log value
        /// </summary>
        const string SecretLogValue = "***";

        /// <summary>
        /// Password
        /// </summary>
        const string Password = nameof(Password);

        /// <summary>
        /// User
        /// </summary>
        const string UserName = nameof(UserName);

        /// <summary>
        /// Render
        /// </summary>
        /// <param name="fieldName">Field</param>
        /// <param name="context">Context</param>
        public override void Render(string fieldName, LoggingFieldRendererContext context)
        {
            string contentBodyJsonText = context.GetFieldValue(fieldName) as string;

            if (contentBodyJsonText != null)
            {
                try
                {
                    JObject contentBody = JsonConvert.DeserializeObject<JObject>(contentBodyJsonText);

                    if (!string.IsNullOrWhiteSpace(contentBody.GetValue(Password, StringComparison.OrdinalIgnoreCase)?.ToString()))
                    {
                        contentBody[Password] = SecretLogValue;
                    }

                    string userLoginName = contentBody.GetValue(UserName, StringComparison.OrdinalIgnoreCase)?.ToString();

                    StringBuilder requestUserIdentifier = new StringBuilder();
                    if (userLoginName != null)
                    {
                        requestUserIdentifier.Append(userLoginName.ToUpper());

                        string requestUri = context.GetFieldValue(RequestResponseLoggingFields.Request.Uri) as string;

                        if (!string.IsNullOrWhiteSpace(requestUri))
                        {
                            requestUserIdentifier.Append('/');

                            try
                            {
                                Uri uri = new Uri(requestUri);
                                requestUserIdentifier.Append(uri.Authority.Split('.')[0]);
                            }
                            catch (Exception ex)
                            {
                                requestUserIdentifier.Append($"[{ex.Message}]");
                            }
                        }

                        context.SetFieldValue(RequestResponseLoggingFields.Request.User, requestUserIdentifier.ToString());
                    }

                    context.SetFieldValue(fieldName, contentBody.ToString());

                }
                catch (Exception ex)
                {
                    context.SetFieldValue(fieldName, ex.ToString());
                }
            }
        }
    }
}