using BlackcmithWorkshopFileImplement;
using BlacksmithWorkshopContracts.BindingModels;
using BlacksmithWorkshopContracts.SearchModels;
using BlacksmithWorkshopContracts.StoragesContracts;
using BlacksmithWorkshopContracts.ViewModels;
using BlacksmithWorkshopFileImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BlacksmithWorkshopFileImplement.Implements
{
    public class MessageInfoStorage : IMessageInfoStorage
    {
        private readonly DataFileSingleton _source;
        public MessageInfoStorage()
        {
            _source = DataFileSingleton.GetInstance();
        }
        public MessageInfoViewModel? GetElement(MessageInfoSearchModel model)
        {
            if (model.MessageId != null)
            {
                return _source.Messages.FirstOrDefault(x => x.MessageId == model.MessageId)?.GetViewModel;
            }
            return null;
        }
        public List<MessageInfoViewModel> GetFilteredList(MessageInfoSearchModel model)
		{
			var res = _source.Messages
                .Where(x => !model.ClientId.HasValue || x.ClientId == model.ClientId)
                .Select(x => x.GetViewModel);
			if (!(model.PageIndex.HasValue && model.PageLength.HasValue))
			{
				return res.ToList();
			}
			return res
                .Skip((model.PageIndex.Value - 1) * model.PageLength.Value)
                .Take(model.PageLength.Value)
                .ToList();
		}
        public List<MessageInfoViewModel> GetFullList()
        {
            return _source.Messages
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public MessageInfoViewModel? Insert(MessageInfoBindingModel model)
        {
            var newMessage = MessageInfo.Create(model);
            if (newMessage == null)
            {
                return null;
            }
            _source.Messages.Add(newMessage);
            _source.SaveMessages();
            return newMessage.GetViewModel;
		}
		public MessageInfoViewModel? Update(MessageInfoBindingModel model)
		{
			var res = _source.Messages.FirstOrDefault(x => x.MessageId.Equals(model.MessageId));
			if (res != null)
			{
				res.Update(model);
				_source.SaveMessages();
			}
			return res?.GetViewModel;
		}
	}
}
