using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.ExtensionMethods;

namespace Tango.FSE.Diagnostics.Project
{
    public class DiagnosticsUserSettingsCollection
    {
        private static JsonSerializerSettings _settings;

        public List<DiagnosticsUserWidgetSettings> Widgets { get; set; }

        public T GetWidgetSettings<T>(DiagnosticsConfigurableWidget widget) where T : DiagnosticsWidgetSettings
        {
            return GetWidgetSettings(widget) as T;
        }

        public DiagnosticsWidgetSettings GetWidgetSettings(DiagnosticsConfigurableWidget widget)
        {
            var record = Widgets.FirstOrDefault(x => x.WidgetID == widget.ID);
            if (record != null)
            {
                return record.Settings;
            }

            return null;
        }

        public void ApplyWidgetSettings(DiagnosticsConfigurableWidget widget)
        {
            var record = Widgets.FirstOrDefault(x => x.WidgetID == widget.ID);
            if (record != null)
            {
                if (widget.Settings == null)
                {
                    widget.Settings = record.Settings;
                }
                else
                {
                    record.Settings.MapPropertiesTo(widget.Settings, MappingFlags.All, (prop) => prop.GetCustomAttribute<JsonIgnoreAttribute>() == null);
                }
            }
        }

        public void SetWidgetSettings(DiagnosticsConfigurableWidget widget)
        {
            var record = Widgets.FirstOrDefault(x => x.WidgetID == widget.ID);
            if (record == null)
            {
                record = new DiagnosticsUserWidgetSettings()
                {
                    WidgetID = widget.ID,
                };
                Widgets.Add(record);
            }

            record.Settings = widget.Settings;
        }

        static DiagnosticsUserSettingsCollection()
        {
            _settings = new JsonSerializerSettings()
            {
                TypeNameHandling = TypeNameHandling.Auto,
                Formatting = Formatting.Indented
            };
        }

        public DiagnosticsUserSettingsCollection()
        {
            Widgets = new List<DiagnosticsUserWidgetSettings>();
        }

        public String ToJson()
        {
            return JsonConvert.SerializeObject(this, _settings);
        }

        public static DiagnosticsUserSettingsCollection FromJson(String json)
        {
            return JsonConvert.DeserializeObject<DiagnosticsUserSettingsCollection>(json, _settings);
        }

        public void ToFile(String fileName)
        {
            File.WriteAllText(fileName, ToJson());
        }

        public static DiagnosticsUserSettingsCollection FromFile(String fileName)
        {
            return FromJson(File.ReadAllText(fileName));
        }
    }
}