using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using System.IO;
using System.Threading.Tasks;

namespace HRD.WebApi.DAL.Middleware
{
    /// <summary>
    /// Gets the current API resource name from HTTP context
    /// </summary>
    /// <param name="httpContext">The HTTP context</param>
    /// <returns>The current resource name if available, otherwise an empty string</returns>

    public class WebApiMiddleware
    {
        private readonly RequestDelegate _next;
        private readonly ILogger<WebApiMiddleware> _logger;

        public WebApiMiddleware(RequestDelegate next, ILogger<WebApiMiddleware> logger)
        {
            _next = next;
            _logger = logger;
        }

        public async Task InvokeAsync(HttpContext httpContext)
        {
            try
            {
                var loglevel = WebApiConfig.GetMonitoringWebRequestLevel(httpContext.Request.Method, httpContext.Request.Path.Value);
                if (loglevel == LogLevel.Information
                    || loglevel == LogLevel.Warning
                    || loglevel == LogLevel.Error
                    )
                {
                    var requestReader = new StreamReader(httpContext.Request.Body);
                    var requestContent = await requestReader.ReadToEndAsync();
                    if (string.IsNullOrEmpty(requestContent))
                    {
                        requestContent = $"{httpContext.Request.Method} {httpContext.Request.Path.Value}";
                    }
                    
                    if (loglevel == LogLevel.Information) { _logger.LogInformation(requestContent); }
                    if (loglevel == LogLevel.Warning) { _logger.LogWarning(requestContent); }
                    if (loglevel == LogLevel.Error) { _logger.LogError(requestContent); }
                }
            }
            catch (System.Exception)
            {
                //throw;
            }

            await _next(httpContext).ConfigureAwait(false);
        }
    }
}