using System;
using System.Collections.Generic;
using System.ComponentModel;
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 ProjectStorage : IProjectStorage
    {
        public List<ProjectViewModel> GetFullList()
        {
            using var context = new TaskTrackerDatabase();
            return context.Projects
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public List<ProjectViewModel> GetFilteredList(ProjectSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ProjectName))
            {
                return new();
            }
            using var context = new TaskTrackerDatabase();
            return context.Projects
                .Where(x => x.ProjectName.Contains(model.ProjectName))
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public ProjectViewModel? GetElement(ProjectSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ProjectName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new TaskTrackerDatabase();
            return context.Projects
                .FirstOrDefault(x => (!string.IsNullOrEmpty(model.ProjectName) && x.ProjectName ==
                 model.ProjectName) || (model.Id.HasValue && x.Id == model.Id))
            ?.GetViewModel;
        }
        public ProjectViewModel? Insert(ProjectBindingModel model)
        {
            var newProject = Project.Create(model);
            if (newProject == null)
            {
                return null;
            }
            using var context = new TaskTrackerDatabase();
            context.Projects.Add(newProject);
            context.SaveChanges();
            return newProject.GetViewModel;
        }
        public ProjectViewModel? Update(ProjectBindingModel model)
        {
            using var context = new TaskTrackerDatabase();
            var project = context.Projects.FirstOrDefault(x => x.Id == model.Id);
            if (project == null)
            {
                return null;
            }
            project.Update(model);
            context.SaveChanges();
            return project.GetViewModel;
        }
        public ProjectViewModel? Delete(ProjectBindingModel model)
        {
            using var context = new TaskTrackerDatabase();
            var element = context.Projects.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Projects.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}