using MongoDB.Bson;
using MongoDB.Driver;
using SushiBarContracts.BindingModels;
using SushiBarContracts.SearchModels;
using SushiBarContracts.StoragesContracts;
using SushiBarContracts.ViewModels;
using SushiBarMongoDB.Models;
using System.Xml;
using Task = SushiBarMongoDB.Models.Task;

namespace SushiBarMongoDB.Implements
{
    public class TaskStorage : ITaskStorage
    {

        public void ClearEntity()
        {
            using var context = new SushiBarMongoDB();
            context.GetCollection<Task>("Tasks")
                .DeleteMany(Builders<Task>.Filter.Empty);
        }

        public List<TaskViewModel> GetFullList()
        {
            using var context = new SushiBarMongoDB();
            var tasks = context.GetCollection<Task>("Tasks").Find(Builders<Task>.Filter.Empty).ToList();

            return tasks.Select(x => x.GetViewModel).ToList();
        }
        public List<TaskViewModel> GetFilteredList(TaskSearchModel model)
        {
            using var context = new SushiBarMongoDB();
            if(!model.Id.HasValue) return new List<TaskViewModel>();

            var filterBuilder = Builders<Task>.Filter;
            var filter = filterBuilder.Empty;
            filter = filterBuilder.Eq("Id", model.Id);

            var tasks = context.GetCollection<Task>("Tasks").Find(filter).ToList();

            return tasks.Select(x => x.GetViewModel).ToList();
        }

        public TaskViewModel? GetElement(TaskSearchModel model)
        {
            using var context = new SushiBarMongoDB();
            var tasks = context.GetCollection<Task>("Tasks");
            if (!model.Id.HasValue) return null;
            return tasks.Find(x => x.Id == model.Id).FirstOrDefault()?.GetViewModel;
        }
        public TaskViewModel? Insert(TaskBindingModel model)
        {
            using var context = new SushiBarMongoDB();


            var tasks = context.GetCollection<Task>("Tasks");

            model.Id = (int)tasks.CountDocuments(FilterDefinition<Task>.Empty) + 1;

            var newTask = Task.Create(model);

            if (newTask == null) return null;


            tasks.InsertOne(newTask);
            return newTask.GetViewModel;
        }
        public TaskViewModel? Update(TaskBindingModel model)
        {
            using var context = new SushiBarMongoDB();
            var task = context.GetCollection<Task>("Tasks").Find(x => x.Id == model.Id).FirstOrDefault();
            if (task == null) return null;
            task.Update(model);
            context.GetCollection<Task>("Tasks").ReplaceOne(x => x.Id == model.Id, task);
            return task.GetViewModel;
        }
        public TaskViewModel? Delete(TaskBindingModel model)
        {
            using var context = new SushiBarMongoDB();
            var element = context.GetCollection<Task>("Tasks").Find(x => x.Id == model.Id).FirstOrDefault();
            if (element != null)
            {
                context.GetCollection<Task>("Tasks").DeleteOne(x => x.Id == model.Id);
                return element.GetViewModel;
            }
            return null;
        }
    }
}