using System;
using System.Web;
using Newtonsoft.Json;
using System.Reflection;
using System.Web.SessionState;
using System.Runtime.Serialization;

namespace LYFZ.WanYuKeFu
{
    public struct AjaxResult
    {
        int _code;
        public int code
        {
            get { return _code; }
        }
        string _info;
        public string info
        {
            get { return _info; }
        }
        object _data;
        public object data
        {
            get { return _data; }
        }
        public AjaxResult(int code, string info, object data = null)
        {
            this._code = code;
            this._info = info;
            this._data = data;
        }
        public AjaxResult(EnumCode.AjaxResultCode ResultCode, string info, object data = null)
        {
            this._code = (int)ResultCode;
            this._info = info.Trim();
            this._data = data;
        }
        public AjaxResult(EnumCode.AjaxResultCode ResultCode, object data = null)
        {
            this._code = (int)ResultCode;
            this._info = ResultCode.ToString().Trim();
            this._data = data;
        }

        public AjaxResult(EnumCode.AjaxResultCode ResultCode, string msg)
        {
            this._code = (int)ResultCode;
            this._info = msg;
            this._data = new { };
        }
    }
    public class ApiBase : IHttpHandler, IRequiresSessionState
    {
        protected HttpContext context;
        protected HttpSessionState Session;

        /// <summary>
        /// 用户子类做初始化的中间操作
        /// </summary>
        /// <param name="context"></param>
        public virtual void Initialize(HttpContext context) { 
        
        }
        
        public virtual void ProcessRequest(HttpContext context)
        {
            this.context = context;

            this.Session = context.Session;

            context.Response.ContentType = "application/json";
            // 设置允许跨域请求
            // context.Response.Headers.Add("Access-Control-Allow-Origin", "http://"+context.Request.Url.Host+":8080");
            // context.Response.Headers.Add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
            // context.Response.Headers.Add("Access-Control-Allow-Headers", "Content-Type");
            // context.Response.Headers.Add("Access-Control-Allow-Credentials", "true");
            Type thisType = this.GetType();
            string[] PathInfos = context.Request.PathInfo.Split('/');
            MethodInfo methodInfo = thisType.GetMethod(PathInfos[1]);
            object[] parametersObj = new object[] { context };

           // string callback = context.Request.QueryString["callback"];

            try
            {
                Initialize(context);

                ajaxReturn((AjaxResult)methodInfo.Invoke(this, parametersObj));

            }
            catch (NullReferenceException)
            {
                ajaxReturn(new AjaxResult(404, "Operation Not Found"));
            }
            catch (Exception e)
            {
                ajaxReturn(new AjaxResult(404, e.Message));
            }
        }
        public void ajaxReturn(AjaxResult result, string callback = null)
        {
            string responseBody = JsonConvert.SerializeObject(result);
            //if (!String.IsNullOrEmpty(callback))
            //{
            //    responseBody = callback + " ( " + responseBody + " ) ";
            //}
            context.Response.Write(responseBody);
        }
        /// <summary>
        /// 读取某个Session对象值
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <returns>Session对象值</returns>
        public object GetObjectFormSession(string strSessionName)
        {
            return this.Session[strSessionName];
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }

    public class EnumCode
    {
        public enum AjaxResultCode
        {
            参数错误 = -777,
            内容超长 = -7,
            授权失败 = -1,
            请求失败 = -999,
            推送失败 = -900,
            请求成功 = 200,
            没有找到目标用户注册的APP设备 = -1000,
        }
    }
}