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 SiteService : ISiteService
    {
        private readonly ISiteRepository _siteRepository;
        private readonly IHospitalRepository _hospitalRepository;
        private readonly IMapper _mapper;
        private readonly IUserTrialRepository _userTrialRepository;
        private readonly IUserRepository _userRepository;

        public SiteService(ISiteRepository researchCenterRepository,
            IHospitalRepository hospitalRepository, IMapper mapper,
            IUserTrialRepository userTrialRepository,
            IUserRepository userRepository)
        {
            _siteRepository = researchCenterRepository;
            _hospitalRepository = hospitalRepository;
            _mapper = mapper;
            _userTrialRepository = userTrialRepository;
            _userRepository = userRepository;
        }

        /// <summary> 分页获取研究中心列表 </summary>
        public PageOutput<SiteSelectDTO> GetSiteList(SiteQueryParam searchModel)
        {
            Expression<Func<Site, bool>> researchCenterLambda = x => true;

            if (!string.IsNullOrWhiteSpace(searchModel.SiteName.Trim()))
            {
                researchCenterLambda = researchCenterLambda.And(t => t.SiteName.Contains(searchModel.SiteName.Trim()));
            }

            IQueryable<SiteSelectDTO> siteQueryable = default;
            if (searchModel.UserId == Guid.Empty) //查询所有Site
            {
                siteQueryable = from site in _siteRepository.GetAll().Where(researchCenterLambda)
                                join hospital in _hospitalRepository.GetAll() on site.HospitalId equals hospital.Id into h
                                from centerHospital in h.DefaultIfEmpty()
                                select new SiteSelectDTO()
                                {
                                    Id = site.Id,
                                    SiteName = site.SiteName,
                                    City = site.City,
                                    Country = site.Country,
                                    SiteCode = site.SiteCode,
                                    HospitalId = site.HospitalId,
                                    DirectorName = site.DirectorName,
                                    DirectorPhone = site.DirectorPhone,
                                    ContactName = site.ContactName,
                                    ContactPhone = site.ContactPhone,
                                    HospitalName = centerHospital.HospitalName
                                };

                //researchCenterQueryable = _researchCenterRepository.GetAll().Where(researchCenterLambda).ProjectTo<ResearchCenterSelectViewModel>();
            }
            else //查询该用户没有是否选中改研究中心 )
            {
                siteQueryable =
                    from site in _siteRepository.GetAll().Where(researchCenterLambda)
                    join userResearchCenter in _userTrialRepository
                        .Find(t => t.UserId == searchModel.UserId) on site.Id equals userResearchCenter
                        .SiteId into t
                    from userResearch in t.DefaultIfEmpty()
                    join hospital in _hospitalRepository.GetAll() on site.HospitalId equals hospital.Id into h
                    from centerHospital in h.DefaultIfEmpty()
                    select new SiteSelectDTO()
                    {
                        Id = site.Id,
                        SiteName = site.SiteName,
                        SiteCode = site.SiteCode,
                        IsSelect = userResearch == null ? false : true,
                        HospitalId = site.HospitalId,
                        HospitalName = centerHospital.HospitalName
                    };
            }
            var count = siteQueryable.Count();

            //处理排序字段
            var propName = string.IsNullOrWhiteSpace(searchModel.SortField) ? "SiteName" : searchModel.SortField;
            //处理升序和降序
            siteQueryable = searchModel.Asc
                ? siteQueryable.OrderBy(propName)
                : siteQueryable.OrderByDescending(propName);

            //分页
            siteQueryable = siteQueryable
                .Skip((searchModel.PageIndex - 1) * searchModel.PageSize)
                .Take(searchModel.PageSize);
            var researchCenterList = siteQueryable.ToList();
            return new PageOutput<SiteSelectDTO>(searchModel.PageIndex, searchModel.PageSize, count, researchCenterList);
        }

        public IEnumerable<SiteSelectionDTO> GetSiteList()
        {
            return _siteRepository.GetAll().ProjectTo<SiteSelectionDTO>(_mapper.ConfigurationProvider);
        }


        /// <summary> 添加研究中心 </summary>
        public IResponseOutput AddOrUpdateSite(SiteCommand site, Guid userId)
        {
            if (site.Id == Guid.Empty || site.Id == null)
            {
                if (_siteRepository.GetAll().FirstOrDefault(t => t.SiteName == site.SiteName) != null)
                {
                    return ResponseOutput.NotOk("Please specify another center name");
                }
                var temp = _mapper.Map<Site>(site);

                var saveMode = _siteRepository.Add(temp);
                var success = _siteRepository.SaveChanges();

                return ResponseOutput.Result(success, saveMode.Id.ToString());
            }
            else
            {
                var updateModel = site;
                bool exist = _siteRepository.IsExist(u => u.SiteName == updateModel.SiteName && u.Id != updateModel.Id);
                if (exist)
                {
                    return ResponseOutput.NotOk("已存在同名的中心名称");
                }

                var success = _siteRepository.Update(u => u.Id == updateModel.Id, s => new Site
                {
                    SiteCode = updateModel.SiteCode,
                    SiteName = updateModel.SiteName,
                    City = updateModel.City,
                    Country = updateModel.Country,
                    HospitalId = updateModel.HospitalId,
                    DirectorName = updateModel.DirectorName,
                    DirectorPhone = updateModel.DirectorPhone,
                    ContactName = updateModel.ContactName,
                    ContactPhone = updateModel.ContactPhone,
                    UpdateUserId = userId,
                    UpdateTime = DateTime.Now
                });

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

        /// <summary> 删除研究中心 </summary>
        public IResponseOutput DeleteSite(Guid siteId)
        {
            if (_userRepository.Find().Any(t => t.OrganizationId == siteId))
            {
                return ResponseOutput.NotOk("该Site下存在用户，暂时无法删除。");
            }
            if (_userTrialRepository.Find().Any(t => t.SiteId == siteId))
            {
                return ResponseOutput.NotOk("有项目在该Site下，暂时无法删除。");
            }
            var success = _siteRepository.Delete(t => t.Id == siteId);
            return ResponseOutput.Result(success);
        }
    }
}