using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.AspNetCore.Mvc.Filters;
using Newtonsoft.Json;
using System.Diagnostics;
using System.Text;

namespace MESApplication
{
    /// <summary>
    /// 方法过滤器
    /// </summary>
    public class ActionFilter : IActionFilter
    {
        /// <summary>
        /// 监控日志
        /// </summary>
        public static ILogger LoggerMonitor { get; set; }

        /// <summary>
        /// 错误日志
        /// </summary>
        public static ILogger LoggerError { get; set; }

        private Stopwatch _stopwatch;

        /// <summary>
        /// 创建请求日志文本
        /// </summary>
        /// <param name="method"></param>
        /// <param name="controllerName"></param>
        /// <param name="actionName"></param>
        /// <param name="actionArgs"></param>
        /// <returns></returns>
        private static string CreateRequestLogText(string method, string controllerName, string actionName, string requestHead, string requestBody)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append($"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")} 请求{method}/{controllerName}/{actionName}接口，请求Head：{requestHead}\n");
            sb.Append($"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")} 请求{method}/{controllerName}/{actionName}接口，请求Body：{requestBody}\n");
            return sb.ToString();
        }

        /// <summary>
        /// 创建响应日志文本
        /// </summary>
        /// <param name="method"></param>
        /// <param name="controllerName"></param>
        /// <param name="actionName"></param>
        /// <param name="result"></param>
        /// <returns></returns>
        private static string CreateResponseLogText(string method, string controllerName, string actionName, object result)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append($"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")} 完成请求{method}/{controllerName}/{actionName}接口，返回结果：");
            if (result != null)
            {
                sb.Append($"{JsonConvert.SerializeObject(result)}");
            }
            else
            {
                sb.Append($"无");
            }
            return sb.ToString();
        }


        /// <summary>
        /// 方法执行前
        /// </summary>
        /// <param name="context"></param>
        /// <exception cref="NotImplementedException"></exception>
        public async void OnActionExecuting(ActionExecutingContext context)
        {
            // ErrorLog.Write("==================================================================================================================================");
            _stopwatch = new Stopwatch();
            _stopwatch.Start();
            //throw new NotImplementedException();
            if (LoggerMonitor != null)
            {
                //记录请求参数日志
                ControllerActionDescriptor desc = context.ActionDescriptor as ControllerActionDescriptor;
                if (desc != null)
                {
                    Dictionary<string, object> headers = new Dictionary<string, object>();
                    var requestHeaders = context.HttpContext.Request.Headers;

                    // 访问请求中的 header 信息
                    foreach (var header in requestHeaders)
                    {
                        headers.Add(header.Key, header.Value);
                    }
                    var requestHead = JsonConvert.SerializeObject(headers);

                    Dictionary<string, object> bodys = new Dictionary<string, object>();
                    var actionArguments = context.ActionArguments;
                    // 访问请求中的参数
                    foreach (var argument in actionArguments)
                    {
                        //dic.Add(argument.Key, argument.Value);
                        var parameter = JsonConvert.DeserializeObject<Dictionary<string, object>>(argument.Value.ToString());
                        foreach (var item in parameter)
                        {
                            bodys.Add(item.Key, item.Value);
                        }
                    }
                    var requestBody = JsonConvert.SerializeObject(bodys);

                    var logText = CreateRequestLogText(context.HttpContext.Request.Method, desc.ControllerName, desc.ActionName, requestHead, requestBody);
                    //LoggerMonitor.LogDebug(logText);
                    //ErrorLog.Write(logText);
                }
            }


        }

        public void OnActionExecuted(ActionExecutedContext context)
        {
            //throw new NotImplementedException();
            _stopwatch.Stop();
            long elaspsedMillisedconds = _stopwatch.ElapsedMilliseconds;
            string msg = "";
            //string msg = $"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")} 接口执行时间：{elaspsedMillisedconds}毫秒";
            //ErrorLog.Write(msg);

            if (context.Exception != null)
            {
                // 记录异常日志
                if (LoggerError != null)
                {
                    LoggerError.LogError(context.Exception, context.Exception.Message);

                    ErrorLog.Write($@"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")} 接口异常：{JsonConvert.SerializeObject(context.Exception)}");
                    ErrorLog.Write($@"{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")} 异常提示信息：{JsonConvert.SerializeObject(context.Exception.Message)}");
                    ErrorLog.Write("==================================================================================================================================");
                }
            }

            if (LoggerMonitor != null)
            {
                // 记录请求结果日志
                ControllerActionDescriptor desc = context.ActionDescriptor as ControllerActionDescriptor;
                if (desc != null)
                {
                    ObjectResult rst = context.Result as ObjectResult;
                    object rstValue = rst != null ? rst.Value : null;
                    var logText = CreateResponseLogText(
                        context.HttpContext.Request.Method,
                        desc.ControllerName,
                        desc.ActionName,
                        rstValue);
                    LoggerMonitor.LogDebug(logText);
                    ErrorLog.Write(logText);
                }
            }
            //  ErrorLog.Write(msg);
            //  ErrorLog.Write("==================================================================================================================================");
        }
    }
}