using Amazon.Auth.AccessControlPolicy;
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 PositionStorage : IPositionStorage
    {
        private readonly ConstructionCompanyDatabase _source;
        public PositionStorage()
        {
            _source = ConstructionCompanyDatabase.GetInstance();
        }
        public List<PositionViewModel> GetFullList()
        {
            List<PositionViewModel> result = new List<PositionViewModel>();
            foreach (var material in _source.Positions)
            {
                result.Add(material.GetViewModel);
            }
            return result;
        }

        public List<PositionViewModel> GetFilteredList(PositionSearchModel model)
        {
            if (model == null || !model.Id.HasValue && string.IsNullOrEmpty(model.PositionName))
            {
                return new();
            }
            List<PositionViewModel> result = new List<PositionViewModel>();
            if (!string.IsNullOrEmpty(model.PositionName))
            {
                foreach (var material in _source.Positions)
                {
                    if (material.PositionName.Equals(model.PositionName)) result.Add(material.GetViewModel);
                }
                return result;
            }
            else
            {
                foreach (var material in _source.Positions)
                {
                    if (material.Id == model.Id) result.Add(material.GetViewModel);
                }
                return result;
            }
        }

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

        public PositionViewModel? Insert(PositionBindingModel model)
        {
            model.Id = _source.Positions.Count > 0 ? _source.Positions.Max(x => x.Id) + 1 : 0;
            var document = Position.CreateBSON(model);
            if (document == null)
            {
                return null;
            }
            _source.InsertDocument(document, "Positions");
            var newPosition = _source.Positions[_source.Positions.Count - 1];
            return newPosition.GetViewModel;
        }

        public PositionViewModel? Update(PositionBindingModel model)
        {
            List<int> ids = new List<int>();
            foreach (var employee in _source.Employees)
            {
                if (employee.PositionID == model.Id) ids.Add(employee.Id);
            }
            var document = Position.UpdateBSON(model, ids);
            if (document == null)
            {
                return null;
            }
            _source.ReplaceDocument(document, new BsonDocument { {"_id" , model.Id} }, "Positions");
            var updatedPosition = _source.Positions.First(x => x.Id == model.Id);
            return updatedPosition.GetViewModel;
        }

        public PositionViewModel? Delete(PositionBindingModel model)
        {
            var deletedPosition = _source.Positions.First(x => x.Id == model.Id).GetViewModel;
            _source.DeleteDocument(new BsonDocument { { "_id", model.Id } }, "Positions");
            return deletedPosition;
        }

        public List<BrigadeReportViewModel> GetPositionsAverage(DateTime dateFrom, DateTime dateTo)
        {
            //var command = Position.PositionsAVGCommnad(dateFrom, dateTo);
            //var result = _source.ExecuteReader(command, 2);
            List<BrigadeReportViewModel> positionsAverages = new List<BrigadeReportViewModel>();
            //foreach (var posAvgPair in result)
            //{
            //    string positionName = _source.Positions.First(x => x.Id == Convert.ToInt32(posAvgPair[0])).PositionName;
            //    positionsAverages.Add(new BrigadeReportViewModel { PositionId = Convert.ToInt32(posAvgPair[0]), PositionName = positionName, materialAvg = Convert.ToDouble(posAvgPair[1]) });
            //}
            return positionsAverages;
        }
    }
}