using System.Collections.Generic;
using System.Linq;
using xCommons.Extensions;
using xDataService.Extensions;
using xDataService.Models;
using xFileService.Models.Dtos;
using xFileService.Models.Entities;

namespace xFileService.Extensions
{
    public static class XModelExtensions
    {
        /// <summary>
        /// Extract References of a Model ...
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static IList<XReference<string>> GetReferences(
            this XFile source
        )
        {
            //
            var result = new List<XReference<string>>();

            //
            if (
                !source.IsNullOrDefault() &&
                !source.References.IsNullOrEmpty()
            )
            {
                //  
                result = source.References
                    .ParseXReferenceList<string>()
                    .ToList();
            }

            //
            return result;
        }

        /// <summary>
        /// Extract References of a Model ...
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static IList<XReference<string>> GetReferences(
            this XFileDto source
        )
        {
            //
            var result = new List<XReference<string>>();

            //
            if (
                !source.IsNullOrDefault() &&
                !source.References.IsNullOrEmpty()
            )
            {
                //  
                result = source.References
                    .ParseXReferenceList<string>()
                    .ToList();
            }

            //
            return result;
        }

        /// <summary>
        /// Update a Model's References by Providing References List ...
        /// </summary>
        /// <param name="source"></param>
        /// <param name="references"></param>
        /// <param name="forceClean"></param>
        /// <returns></returns>
        public static XFile UpdateReferences(
            this XFile source,
            IList<XReference<string>> references,
            bool forceClean = true
        )
        {
            //
            XFile result = source;

            //
            if (!source.IsNullOrDefault())
            {
                //
                result = source;
                
                //
                if (forceClean)
                {
                    result.References = string.Empty;
                }

                //
                if (!references.IsNull() && 
                    references.HasChild())
                {
                    result.References = references.ToXReferenceString();
                }
            }

            //
            return result;
        }

        /// <summary>
        /// Update a Model's References by Providing References List ...
        /// </summary>
        /// <param name="source"></param>
        /// <param name="references"></param>
        /// <param name="forceClean"></param>
        /// <returns></returns>
        public static XFileDto UpdateReferences(
            this XFileDto source,
            IList<XReference<string>> references,
            bool forceClean = true
        )
        {
            //
            XFileDto result = source;

            //
            if (!source.IsNullOrDefault())
            {
                //
                result = source;
                
                //
                if (forceClean)
                {
                    result.References = string.Empty;
                }

                //
                if (!references.IsNull() && 
                    references.HasChild())
                {
                    result.References = references.ToXReferenceString();
                }
            }

            //
            return result;
        }
    }
}