using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TaskTrackerContracts.BindingModels;
using TaskTrackerContracts.SearchModels;
using TaskTrackerContracts.StoragesContracts;
using TaskTrackerContracts.ViewModels;
using TaskTrackerDatabase.Models;

namespace TaskTrackerDatabase.Implements
{
    public class OrganizationStorage : IOrganizationStorage
    {
        public List<OrganizationViewModel> GetFullList()
        {
            using var context = new TaskTrackerDatabase();
            return context.Organizations
             .Include(x => x.Projects)
             .ThenInclude(x => x.Project)
             .ToList()
             .Select(x => x.GetViewModel)
             .ToList();
        }
        public List<OrganizationViewModel> GetFilteredList(OrganizationSearchModel model)
        {
            if (string.IsNullOrEmpty(model.OrganizationName))
            {
                return new();
            }
            using var context = new TaskTrackerDatabase();
            return context.Organizations
                .Include(x => x.Projects)
                .ThenInclude(x => x.Project)
                .Where(x => x.OrganizationName.Contains(model.OrganizationName))
                .ToList()
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public OrganizationViewModel? GetElement(OrganizationSearchModel model)
        {
            if (string.IsNullOrEmpty(model.OrganizationName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new TaskTrackerDatabase();
            return context.Organizations
                .Include(x => x.Projects)
                .ThenInclude(x => x.Project)
                .FirstOrDefault(x => (!string.IsNullOrEmpty(model.OrganizationName) && x.OrganizationName == model.OrganizationName) ||
                                (model.Id.HasValue && x.Id == model.Id))
            ?.GetViewModel;
        }
        public OrganizationViewModel? Insert(OrganizationBindingModel model)
        {
            using var context = new TaskTrackerDatabase();
            var newReinforced = Organization.Create(context, model);
            if (newReinforced == null)
            {
                return null;
            }
            context.Organizations.Add(newReinforced);
            context.SaveChanges();
            return newReinforced.GetViewModel;
        }
        public OrganizationViewModel? Update(OrganizationBindingModel model)
        {
            using var context = new TaskTrackerDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var reinforced = context.Organizations.FirstOrDefault(rec => rec.Id == model.Id);
                if (reinforced == null)
                {
                    return null;
                }
                reinforced.Update(model);
                context.SaveChanges();
                reinforced.UpdateProjects(context, model);
                transaction.Commit();
                return reinforced.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
        public OrganizationViewModel? Delete(OrganizationBindingModel model)
        {
            using var context = new TaskTrackerDatabase();
            var element = context.Organizations
            .Include(x => x.Projects)
            .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Organizations.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}