using Gatedge.K3Cloud.Utils.Exceptions;
using Gatedge.ScanCode.Common;
using System.Text.Json;

namespace Gatedge.ScanCode.Middleware
{
    /// <summary>
    /// 自定义异常中间件
    /// </summary>
    public class GlobalExceptionMiddleware
    {
        /// <summary>
        /// 委托
        /// </summary>
        private readonly RequestDelegate _next;
        private readonly ILogger<GlobalExceptionMiddleware> _logger;


        /// <summary>
        /// 构造方法
        /// </summary>
        /// <param name="next"></param>
        /// <param name="logger"></param>
        public GlobalExceptionMiddleware(RequestDelegate next, ILogger<GlobalExceptionMiddleware> logger)
        {
            _next = next;
            _logger = logger;
        }

        /// <summary>
        /// 拦截请求
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public async Task Invoke(HttpContext context)
        {
            try
            {
                await _next(context);
            }
            catch (Exception ex)
            {
                var result = AjaxResult.Error(500, ex.Message);
                var errTitle = ex.Message;
                var errInfo = ex.Message;
                if (ex is K3CloudException)
                {
                    K3CloudException k3ViewException = (K3CloudException)ex;
                    result = AjaxResult.Error(ex.Message);
                    result.Add("error", k3ViewException.responseStatus.Errors);
                    errInfo = JsonSerializer.Serialize(k3ViewException.responseStatus.Errors);
                }
                var errMessage = @$"
=================================================
errTitle: {errTitle}
errInfo: {errInfo}
=================================================
";
                _logger.LogError(errMessage);
                context.Response.ContentType = "application/problem+json";
                var stream = context.Response.Body;
                await JsonSerializer.SerializeAsync(stream, result);
            }
        }
    }
}