using AutoMapper;
using AutoMapper.QueryableExtensions;
using IRaCIS.Application.ExpressionExtend;
using IRaCIS.Application.Interfaces;
using IRaCIS.Application.ViewModels;
using IRaCIS.Core.Application.Contracts.RequestAndResponse;
using IRaCIS.Core.Domain.Interfaces;
using IRaCIS.Core.Domain.Models;
using IRaCIS.Core.Domain.Share;
using IRaCIS.Infra.Data.ExpressionExtend;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;

namespace IRaCIS.Application.Services
{
    public class HospitalService : IHospitalService
    {
        private readonly IHospitalRepository _hospitalRepository;
        private readonly IDoctorRepository _doctorRepository;
        private readonly IUserRepository _userRepository;
        private readonly IMapper _mapper;

        public HospitalService(IHospitalRepository hospitalRepository, IDoctorRepository doctorRepository,
            IUserRepository userRepository, IMapper mapper)
        {
            _hospitalRepository = hospitalRepository;
            _doctorRepository = doctorRepository;
            _userRepository = userRepository;
            _mapper = mapper;
        }

        /// <summary> 获取所有医院列表 </summary>
        public IEnumerable<HospitalDTO> GetHospitalList()
        {
            return _hospitalRepository.GetAll().ProjectTo<HospitalDTO>(_mapper.ConfigurationProvider);
        }

        /// <summary> 添加医院 </summary>
        public IResponseOutput AddOrUpdateHospital(HospitalCommand addViewModel)
        {
            if (addViewModel.Id == Guid.Empty || addViewModel.Id == null)
            {
                if (_hospitalRepository.GetAll().FirstOrDefault(t => t.HospitalName == addViewModel.HospitalName) != null)
                {
                    return ResponseOutput.NotOk("Same hospital name already exist.");
                }
                var hospital = _hospitalRepository.Add(_mapper.Map<Hospital>(addViewModel));
                var success = _hospitalRepository.SaveChanges();

                return ResponseOutput.Result(success, hospital.Id.ToString());
            }
            else
            {
                var updateViewModel = addViewModel;
                if (_hospitalRepository.FindSingleOrDefault(t => t.HospitalName == updateViewModel.HospitalName && t.Id != updateViewModel.Id) != null)
                {
                    return ResponseOutput.NotOk("Same hospital name already exist.");
                }
                var success = _hospitalRepository.Update(t => t.Id == updateViewModel.Id, u => new Hospital()
                {
                    City = updateViewModel.City,
                    Country = updateViewModel.Country,
                    HospitalName = updateViewModel.HospitalName,
                    Province = updateViewModel.Province,
                    UniversityAffiliated = updateViewModel.UniversityAffiliated
                });

                return ResponseOutput.Result(success, success ? string.Empty : StaticData.UpdateFailed);
            }
        }



        /// <summary> 删除医院信息 </summary>
        public IResponseOutput DeleteHospital(Guid hospitalId)
        {
            if (_doctorRepository.GetAll().FirstOrDefault(t => t.Id == hospitalId) != null)
            {
                return ResponseOutput.NotOk("医生信息表已关联此医院");
            }
            if (_userRepository.Find().Any(t => t.OrganizationId == hospitalId))
            {
                return ResponseOutput.NotOk("该医院下存在用户，暂时无法删除。");
            }

            var success = _hospitalRepository.Delete(t => t.Id == hospitalId);

            return ResponseOutput.Result(success, success ? string.Empty : StaticData.DeleteFailed);
        }

        /// <summary> 分页获取医院列表 </summary>
        public PageOutput<HospitalDTO> GetHospitalPageList(HospitalQueryDTO hospitalSearchModel)
        {
            Expression<Func<Hospital, bool>> hospitalLambda = x => true;

            if (hospitalSearchModel.HospitalName.Trim() != string.Empty)
            {
                hospitalLambda = hospitalLambda.And(t => t.HospitalName.Contains(hospitalSearchModel.HospitalName.Trim()));
            }
            if (hospitalSearchModel.City.Trim() != string.Empty)
            {
                hospitalLambda = hospitalLambda.And(t => t.City.Contains(hospitalSearchModel.City.Trim()));
            }
            if (hospitalSearchModel.Province.Trim() != string.Empty)
            {
                hospitalLambda = hospitalLambda.And(t => t.Province.Contains(hospitalSearchModel.Province.Trim()));
            }

            var hospitalQueryable =
                _hospitalRepository.GetAll().Where(hospitalLambda).ProjectTo<HospitalDTO>(_mapper.ConfigurationProvider);
            var count = hospitalQueryable.Count();
            var propName = string.IsNullOrWhiteSpace(hospitalSearchModel.SortField) ? "HospitalName" : hospitalSearchModel.SortField;
            hospitalQueryable = hospitalSearchModel.Asc
                ? hospitalQueryable.OrderBy(propName)
                : hospitalQueryable.OrderByDescending(propName);

            hospitalQueryable = hospitalQueryable
                .Skip((hospitalSearchModel.PageIndex - 1) * hospitalSearchModel.PageSize)
                .Take(hospitalSearchModel.PageSize);
            var userList = hospitalQueryable.ToList();
            return new PageOutput<HospitalDTO>(hospitalSearchModel.PageIndex, hospitalSearchModel.PageSize, count, userList);
        }
    }
}