// ==========================================================================
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using Google.Cloud.Diagnostics.Common;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Extensions;
using Squidex.Infrastructure;
using Squidex.Log;

namespace Squidex.Extensions.APM.Stackdriver
{
    internal sealed class StackdriverExceptionHandler : ILogAppender
    {
        private readonly IContextExceptionLogger logger;
        private readonly HttpContextWrapper httpContextWrapper;

        public sealed class HttpContextWrapper : IContextWrapper
        {
            private readonly IHttpContextAccessor httpContextAccessor;

            internal HttpContextWrapper(IHttpContextAccessor httpContextAccessor)
            {
                this.httpContextAccessor = httpContextAccessor;
            }

            public string GetHttpMethod()
            {
                return httpContextAccessor.HttpContext?.Request?.Method ?? string.Empty;
            }

            public string GetUri()
            {
                return httpContextAccessor.HttpContext?.Request?.GetDisplayUrl() ?? string.Empty;
            }

            public string GetUserAgent()
            {
                return httpContextAccessor.HttpContext?.Request?.Headers["User-Agent"].ToString() ?? string.Empty;
            }
        }

        public StackdriverExceptionHandler(IContextExceptionLogger logger, IHttpContextAccessor httpContextAccessor)
        {
            this.logger = logger;

            httpContextWrapper = new HttpContextWrapper(httpContextAccessor);
        }

        public void Append(IObjectWriter writer, SemanticLogLevel logLevel, Exception exception)
        {
            try
            {
                if (exception != null && exception is not DomainException && exception is not OperationCanceledException)
                {
                    logger.Log(exception, httpContextWrapper);
                }
            }
            catch
            {
                return;
            }
        }
    }
}