using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using TaskTrackerContracts.BindingModels;
using TaskTrackerContracts.SearchModels;
using TaskTrackerContracts.StoragesContracts;
using TaskTrackerContracts.ViewModels;

namespace TaskTrackerDatabaseImplement.Implements
{
	public class TaskStorage : ITaskStorage
	{
		public TaskViewModel? Delete(TaskBindingModel model)
		{
			using var context = new TasktrackerContext();
			var element = context.Tasks.FirstOrDefault(rec => rec.Id ==
		   model.Id);
			if (element != null)
			{
				context.Tasks.Remove(element);
				context.SaveChanges();
				return element.GetViewModel;
			}
			return null;
		}

		public TaskViewModel? GetElement(TaskSearchModel model)
		{
			if (!model.Id.HasValue)
			{
				return null;
			}
			using var context = new TasktrackerContext();
			return context.Tasks
			 .FirstOrDefault(x =>
			(model.Id.HasValue && x.Id ==
			model.Id))
			?.GetViewModel;
		}

		public List<TaskViewModel> GetFilteredList(TaskSearchModel model)
		{
			if (!model.Id.HasValue && !model.ProjectId.HasValue)
			{
				return new();
			}
			using var context = new TasktrackerContext();
			
			return context.Tasks
				.Include(x => x.Project)
			  .Where(x => x.ProjectId == model.ProjectId)
			  .Select(x => x.GetViewModel)
			  .ToList();
		}
		public List<TaskViewModel> GetTaskListDate(TaskSearchModel model, ProjectSearchModel modelS)
		{
			
			using var context = new TasktrackerContext();
			return context.Tasks.
				OrderBy(x => x.StartDate)
				.Include(x => x.Project)
				.Where(x => x.StartDate >= model.DateFrom && x.StartDate <= model.DateTo && x.Project.CompanyId == modelS.CompanyId)
				.Select(x => x.GetViewModel)
				.ToList();
		
		}


		public List<TaskViewModel> GetFullList()
		{
			using var context = new TasktrackerContext();
			return context.Tasks
			.ToList()
			.Select(x => x.GetViewModel)
			.ToList();
		}

		public TaskViewModel? Insert(TaskBindingModel model)
		{
			using var context = new TasktrackerContext();
			var newProduct = Task.Create(context, model);
		
			if (newProduct == null)
			{
				return null;
			}
			
			context.Tasks.Add(newProduct);
			context.SaveChanges();
			return context.Tasks.FirstOrDefault(x => x.Id == newProduct.Id)?.GetViewModel;
		}

		public TaskViewModel? Update(TaskBindingModel model)
		{
			using var context = new TasktrackerContext();

			var product = context.Tasks.FirstOrDefault(rec =>
			rec.Id == model.Id);
			if (product == null)
			{
				return null;
			}
			product.Update(model);
			context.SaveChanges();

			return product.GetViewModel;
		}
	}
}