using ConstructionCompanyContracts.BindingModels;
using ConstructionCompanyContracts.SearchModels;
using ConstructionCompanyContracts.StorageContracts;
using ConstructionCompanyContracts.ViewModels;
using ConstructionCompanyMongoDBImplement.Models;
using MongoDB.Bson;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConstructionCompanyMongoDBImplement.Implements
{
    public class MaterialStorage : IMaterialStorage
    {
        private readonly ConstructionCompanyDatabase _source;
        public MaterialStorage()
        {
            _source = ConstructionCompanyDatabase.GetInstance();
        }
        public List<MaterialViewModel> GetFullList()
        {
            List<MaterialViewModel> result = new List<MaterialViewModel>();
            foreach (var material in _source.Materials)
            {
                result.Add(material.GetViewModel);
            }
            return result;
        }

        public List<MaterialViewModel> GetFilteredList(MaterialSearchModel model)
        {
            if (model == null || !model.Id.HasValue || string.IsNullOrEmpty(model.MaterialName))
            {
                return new();
            }
            List<MaterialViewModel> result = new List<MaterialViewModel>();
            if (!string.IsNullOrEmpty(model.MaterialName))
            {
                foreach (var material in _source.Materials)
                {
                    if (material.MaterialName.Equals(model.MaterialName)) result.Add(material.GetViewModel);
                }
                return result;
            }
            else
            {
                foreach (var material in _source.Materials)
                {
                    if (material.Id == model.Id) result.Add(material.GetViewModel);
                }
                return result;
            }
        }

        public MaterialViewModel? GetElement(MaterialSearchModel model)
        {
            if (model == null || !model.Id.HasValue)
            {
                return new();
            }
            return _source.Materials.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }

        public MaterialViewModel? Insert(MaterialBindingModel model)
        {
            model.Id = _source.Materials.Count > 0 ? _source.Materials.Max(x => x.Id) + 1 : 0;
            var document = Material.CreateBSON(model);
            if (document == null)
            {
                return null;
            }
            _source.InsertDocument(document, "Materials");
            var newMaterial = _source.Materials[_source.Materials.Count - 1];
            return newMaterial.GetViewModel;
        }

        public MaterialViewModel? Update(MaterialBindingModel model)
        {
            var document = Material.UpdateBSON(model);
            if (document == null)
            {
                return null;
            }
            _source.ReplaceDocument(document, new BsonDocument { { "_id", model.Id } }, "Materials");
            var updatedMaterial = _source.Materials.First(x => x.Id == model.Id);
            return updatedMaterial.GetViewModel;
        }

        public MaterialViewModel? Delete(MaterialBindingModel model)
        {
            var deletedMaterial = _source.Materials.First(x => x.Id == model.Id).GetViewModel;
            _source.DeleteDocument(new BsonDocument { { "_id", model.Id } }, "Materials");
            return deletedMaterial;
        }
        public List<EmployeeViewModel>? GetEmployeesUsingMaterial(MaterialBindingModel model)
        {
            if (model == null)
            {
                return null;
            }

            //List<Employee> employeesList = _source.Employees;
            //BsonDocument filter = new BsonDocument { { "materials.materialId", new BsonDocument("$eq", model.Id) } };
            //List<BsonDocument> fiteredOrders = _source.FilterDocuments(filter, "Orders");
            //List<EmployeeViewModel> employees = new List<EmployeeViewModel>();
            //foreach (var order in fiteredOrders)
            //{
            //    var orderEmployees = order[8].AsBsonArray;
            //    foreach (var employee in orderEmployees)
            //    {
            //        var emp = employees.FirstOrDefault(x => x.Id == employee.ToInt32());
            //        if (emp == null)
            //        {
            //            employees.Add(employeesList.First(x => x.Id == employee.ToInt32()).GetViewModel);
            //        }
            //    }
            //}

            var employees = _source.reportMaterials(model.Id);
            return employees;
        }
    }
}