using System.Linq;
using xCategoryService.Providers.Dtos;
using xCommons.Extensions;

namespace xCategoryService.Extensions
{
    /// <summary>
    /// Extensions Method Related to XCategoryResourceDto ...
    /// </summary>
    public static class XCategoryResourceExtensions
    {
        /// <summary>
        /// Check a Resource is Valid or not ...
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static bool IsValid(
            this XCategoryResourceDto source
        )
        {
            //
            return
                !source.IsNullOrDefault() &&
                !source.Item.IsNullOrDefault();
        }

        /// <summary>
        /// Check a Resource is a New Resource for Add or not ...
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static bool IsNew(
            this XCategoryResourceDto source
        )
        {
            //
            return
                source.IsValid() &&
                !source.Item.Id.IsValidIntId();
        }

        /// <summary>
        /// Extract Available Languages ...
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static string[] ExtractLanguages(
            this XCategoryResourceDto source
        )
        {
            //
            var result = new string[] { };

            //
            // Validate ...
            if (!source.IsValid())
            {
                return result;
            }

            //
            result =
                source.Titles.Locales.Select(x => x.Language)
                .Union(source.Descriptions.Locales.Select(x => x.Language))
                .Distinct()
                .ToArray();

            //
            return result;
        }

        // public static bool ValidateResources(
        //     this XCategoryResourceDto source
        // )
        // {
        //     var result = 
        // }
    }
}