using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;

namespace PRSDesktop.Configuration
{
    internal class CustomPropertyGrid : DynamicDataGrid<CustomProperty>
    {
        public CustomPropertyGrid()
        {
            Options.AddRange(DynamicGridOption.RecordCount, DynamicGridOption.SelectColumns);
            HiddenColumns.Add(x => x.Class);
            HiddenColumns.Add(x => x.Type);
        }

        protected override void DoValidate(CustomProperty[] items, List<string> errors)
        {
            base.DoValidate(items, errors);
            if (items.Any(x => string.IsNullOrWhiteSpace(x.Class)))
                errors.Add("[Class] must not be blank!");
            if (items.Any(x => string.IsNullOrWhiteSpace(x.Name)))
                errors.Add("[Name] must not be blank!");
            if (items.Any(x => string.IsNullOrWhiteSpace(x.Type)))
                errors.Add("[Type] must not be blank!");
        }

        private IEnumerable<Type> FindTypes(Func<Type, bool> predicate)
        {
            if (predicate == null)
                throw new ArgumentNullException(nameof(predicate));

            foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
                if (!assembly.IsDynamic)
                {
                    Type[] exportedTypes = null;
                    try
                    {
                        exportedTypes = assembly.GetExportedTypes();
                    }
                    catch (ReflectionTypeLoadException e)
                    {
                        exportedTypes = e.Types;
                    }

                    if (exportedTypes != null)
                        foreach (var type in exportedTypes)
                            if (predicate(type))
                                yield return type;
                }
        }

        public override void ConfigureColumns(DynamicGridColumns columns /*, bool dolookups = true */)
        {
            base.ConfigureColumns(columns /*, dolookups */);

            var column = columns.FirstOrDefault(x => x.ColumnName.Equals("Class"));
            if (column != null)
            {
                column.Lookups.Clear();
                var classes = CoreUtils.TypeList(
                    new[]
                    {
                        typeof(Setout).Assembly
                    },
                    myType =>
                        myType.IsClass
                        && !myType.IsAbstract
                        && !myType.IsGenericType
                        && myType.IsSubclassOf(typeof(Entity))
                        && myType.GetInterfaces().Contains(typeof(IPersistent))
                ).OrderBy(x => x.EntityName()).ToArray();
                foreach (var entity in classes)
                    if (ClientFactory.IsSupported(entity))
                        column.Lookups[entity.EntityName()] = entity;
            }

            column = columns.FirstOrDefault(x => x.ColumnName.Equals("Type"));
            if (column != null)
            {
                column.Lookups.Clear();
                column.Lookups[typeof(string).EntityName()] = typeof(string).EntityName();
                column.Lookups[typeof(int).EntityName()] = typeof(int).EntityName();
                column.Lookups[typeof(double).EntityName()] = typeof(double).EntityName();
                column.Lookups[typeof(bool).EntityName()] = typeof(bool).EntityName();
                column.Lookups[typeof(DateTime).EntityName()] = typeof(DateTime).EntityName();
            }
        }

        protected override void Reload(Filters<CustomProperty> criteria, Columns<CustomProperty> columns, ref SortOrder<CustomProperty> sort,
            Action<CoreTable, Exception> action)
        {
            base.Reload(criteria, columns, ref sort, action);
        }
    }
}