using ForumContracts.BindingModels;
using ForumContracts.SearchModels;
using ForumContracts.StoragesContracts;
using ForumContracts.ViewModels;
using BlogDatabase.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BlogDatabase.Implements
{
    public class RoleStorage : IRoleStorage
    {
        public void RoleInsertList(int num)
        {
            Random rnd = new Random();
            using var context = new BlogDatabase();
            for (int i = 0; i < num; ++i)
            {
                var model = new RoleBindingModel
                {
                    Id = 0,
                    Name = rnd.Next(1000).ToString(),
                };
                context.Roles.Add(Role.Create(model));
            }
            context.SaveChanges();
        }
        public RoleViewModel? Delete(RoleBindingModel model)
        {
            using var context = new BlogDatabase();
            var element = context.Roles.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Roles.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public RoleViewModel? GetElement(RoleSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Name) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new BlogDatabase();
            return context.Roles
                .FirstOrDefault(x =>
                (!string.IsNullOrEmpty(model.Name) && x.Name ==
                model.Name) ||
                (model.Id.HasValue && x.Id == model.Id))
                ?.GetViewModel;
        }

        public List<RoleViewModel> GetFilteredList(RoleSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Name))
            {
                return new();
            }
            using var context = new BlogDatabase();
            return context.Roles
                .Where(x => x.Name.Contains(model.Name))
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<RoleViewModel> GetFullList()
        {
            using var context = new BlogDatabase();
            return context.Roles
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public RoleViewModel? Insert(RoleBindingModel model)
        {
            var newRole = Role.Create(model);
            if (newRole == null)
            {
                return null;
            }
            using var context = new BlogDatabase();
            context.Roles.Add(newRole);
            context.SaveChanges();
            return newRole.GetViewModel;
        }

        public RoleViewModel? Update(RoleBindingModel model)
        {
            using var context = new BlogDatabase();
            var component = context.Roles.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }
    }
}