using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Web.Mvc;

namespace Webclient.Models
{
    [ModelBinder(typeof(GridModelBinder))]
    public class GridSettings
    {
        public bool IsSearch { get; set; }
        public int PageSize { get; set; }
        public int PageIndex { get; set; }
        public string SortColumn { get; set; }
        public string SortOrder { get; set; }

        public Filter Where { get; set; }
    }
    [DataContract]
    public class Filter
    {
        [DataMember]
        public string groupOp { get; set; }
        [DataMember]
        public Rule[] rules { get; set; }

        public static Filter Create(string jsonData)
        {
            try
            {
                var serializer =
                  new DataContractJsonSerializer(typeof(Filter));
                var reader = new System.IO.StringReader(jsonData);
                var ms = new System.IO.MemoryStream(Encoding.Default.GetBytes(jsonData));
                return serializer.ReadObject(ms) as Filter;
            }
            catch
            {
                return null;
            }
        }
    }


    [DataContract]
    public class Rule
    {
        [DataMember]
        public string field { get; set; }
        [DataMember]
        public string op { get; set; }
        [DataMember]
        public string data { get; set; }
    }


    public class GridModelBinder : IModelBinder
    {
        public object BindModel(ControllerContext controllerContext,
                                ModelBindingContext bindingContext)
        {
            try
            {
                var request = controllerContext.HttpContext.Request;
                return new GridSettings
                {
                    IsSearch = bool.Parse(request["_search"] ?? "false"),
                    PageIndex = int.Parse(request["page"] ?? "1"),
                    PageSize = int.Parse(request["rows"] ?? "10"),
                    SortColumn = request["sidx"] ?? "",
                    SortOrder = request["sord"] ?? "asc",
                    Where = Filter.Create(request["filters"] ?? "")
                };
            }
            catch
            {
                return null;
            }
        }
    }
}