using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Traffic.Data.Models;
using Traffic.Data.ViewModels;
using Traffic.Repository.Infrastructures;
using Traffic.Service.Interfaces;

namespace Traffic.Service.Implements
{
    public class PoliceStationService : IPoliceStationService
    {
        private readonly IUnitOfWork _unitOfWork;

        public PoliceStationService(IUnitOfWork unitOfWork)
        {
            _unitOfWork = unitOfWork;
        }

        public PageViewModel<IEnumerable<PoliceStationViewModel>> GetPoliceStations(SearchModel searchModel)
        {
            var company = _unitOfWork.PoliceStationRepository.GetPoliceStations();

            if (!string.IsNullOrEmpty(searchModel.Term))
            {
                company = company.Where(x => x.Area.Contains(searchModel.Term) || x.StationName.Contains(searchModel.Term));
            }

            int count = company.Count();
            int pageCount = count % searchModel.PageSize != 0 ? (count / searchModel.PageSize) + 1 : count / searchModel.PageSize;

            switch (searchModel.Order.ToLower())
            {
                case "id":
                default:
                    company = searchModel.IsAsc? company.OrderBy(x => x.Id) : company.OrderByDescending(x => x.Id);
                    break;
                case "area":
                    company = searchModel.IsAsc ? company.OrderBy(x => x.Area).ThenBy(x => x.Id) : company.OrderByDescending(x => x.Area).ThenByDescending(x => x.Id);
                    break;
                case "stationname":
                    company = searchModel.IsAsc? company.OrderBy(x => x.StationName).ThenBy(x => x.Id) : company.OrderByDescending(x => x.StationName).ThenByDescending(x => x.Id);
                    break;
            }

            company = company.Skip((searchModel.Page - 1) * searchModel.PageSize).Take(searchModel.PageSize);
            var data = company.ToList().Select(x => new PoliceStationViewModel
            {
                Id = x.Id,
                Area = x.Area,
                StationName = x.StationName
            });

            return new PageViewModel<IEnumerable<PoliceStationViewModel>>
            {
                RowCount = count,
                PageCount = pageCount,
                CurrentPage = searchModel.Page,
                Data = data,
            };
        }

        public PoliceStationViewModel GetPoliceStationById(int id)
        {
            try
            {
                var station = _unitOfWork.PoliceStationRepository.GetPoliceStationById(id);
                if (station != null)
                {
                    return new PoliceStationViewModel
                    {
                        Id = station.Id,
                        Area = station.Area,
                        StationName = station.StationName,
                    };
                }
                else
                {
                    return null;
                }
            }
            catch (Exception ex)
            {
                return null;
            }
        }

        public IEnumerable<PoliceStationViewModel> GetGroupNameList()
        {
            var data = _unitOfWork.PoliceStationRepository.GetPoliceStations().Select(x => new PoliceStationViewModel
            {
                Id = x.Id,
                Area = x.Area,
                StationName = x.StationName
            });
            return data;
        }

        public TradeResultModel InsertPoliceStation(PoliceStationViewModel PoliceStation)
        {
            try
            {
                var station = new PoliceStation
                {
                    Area = PoliceStation.Area,
                    StationName = PoliceStation.StationName,
                };

                var result = _unitOfWork.PoliceStationRepository.InsertPoliceStation(station);
                _unitOfWork.Complete();

                return new TradeResultModel { Success = result, Message = result ? "新增成功" : "新增失敗" };
            }
            catch (Exception ex)
            {
                _unitOfWork.Rollback();
                return new TradeResultModel() { Success = false, Message = ex.ToString() };
            }
        }

        public TradeResultModel UpdatPoliceStation(PoliceStationViewModel PoliceStation)
        {
            try
            {
                var station = new PoliceStation
                {
                    Id = PoliceStation.Id,
                    Area = PoliceStation.Area,
                    StationName = PoliceStation.StationName,
                };

                var result = _unitOfWork.PoliceStationRepository.UpdatePoliceStation(station);
                _unitOfWork.Complete();

                return new TradeResultModel { Success = result, Message = result ? "修改成功" : "修改失敗" };
            }
            catch (Exception ex)
            {
                _unitOfWork.Rollback();
                return new TradeResultModel() { Success = false, Message = ex.ToString() };
            }
        }

        public TradeResultModel DeletePoliceStation(int id)
        {
            try
            {
                var result = _unitOfWork.PoliceStationRepository.DeletePoliceStation(id);
                _unitOfWork.Complete();

                return new TradeResultModel { Success = result, Message = result ? "刪除成功" : "刪除失敗" };
            }
            catch (Exception ex)
            {
                _unitOfWork.Rollback();
                return new TradeResultModel() { Success = false, Message = ex.ToString() };
            }
        }
    }
}