using System;
using System.Linq;
using System.Linq.Expressions;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Data.Common;
using System.Text;
using YiSha.Util;
using YiSha.Util.Extension;
using YiSha.Util.Model;
using YiSha.Data;
using YiSha.Data.Repository;
using YiSha.Entity.OrganizationManage;
using YiSha.Model.Param.OrganizationManage;
using YiSha.Enum;

namespace YiSha.Service.OrganizationManage
{
    public partial class NewsService
    {
        private IRepositoryFactory _baseRepository;
        public NewsService(IRepositoryFactory baseRepository)
        {
            _baseRepository = baseRepository;
        }

        #region 获取数据
        public async Task<List<NewsEntity>> GetListPartial(NewsListParam param)
        {
            var strSql = new StringBuilder();
            List<DbParameter> filter = ListFilterPartial(param, strSql);
            var list = await _baseRepository.BaseRepository(dbConnectType).FindList<NewsEntity>(strSql.ToString(), filter.ToArray());
            return list.ToList();
        }

        public async Task<List<NewsEntity>> GetPageListPartial(NewsListParam param, Pagination pagination)
        {
            var strSql = new StringBuilder();
            List<DbParameter> filter = ListFilterPartial(param, strSql);
            var list = await _baseRepository.BaseRepository(dbConnectType).FindList<NewsEntity>(strSql.ToString(), filter.ToArray(), pagination);
            return list.ToList();
        }

        public async Task<List<NewsEntity>> GetPageContentListPartial(NewsListParam param, Pagination pagination)
        {
            var strSql = new StringBuilder();
            List<DbParameter> filter = ListFilterPartial(param, strSql, true);
            var list = await _baseRepository.BaseRepository(dbConnectType).FindList<NewsEntity>(strSql.ToString(), filter.ToArray(), pagination);
            return list.ToList();
        }

        public async Task<NewsEntity> GetEntityPartial(int id)
        {
            return await _baseRepository.BaseRepository(dbConnectType).FindEntity<NewsEntity>(id);
        }

        public async Task<int> GetMaxSortPartial()
        {
            object result = await _baseRepository.BaseRepository(dbConnectType).FindObject("SELECT MAX(NewsSort) FROM SysNews");
            int sort = result.ParseToInt();
            sort++;
            return sort;
        }
        #endregion

        #region 提交数据
        public async Task SaveFormPartial(NewsEntity entity)
        {
            if (entity.Id.IsNullOrZero())
            {
                await entity.Create();
                await _baseRepository.BaseRepository(dbConnectType).Insert<NewsEntity>(entity);
            }
            else
            {
                await entity.Modify();
                await _baseRepository.BaseRepository(dbConnectType).Update<NewsEntity>(entity);
            }
        }
        #endregion

        #region 私有方法
        private List<DbParameter> ListFilterPartial(NewsListParam param, StringBuilder strSql, bool bNewsContent = false)
        {
            strSql.Append(@"SELECT  a.Id,
                                    a.BaseModifyTime,
                                    a.BaseModifierId,
                                    a.NewsTitle,
                                    a.ThumbImage,
                                    a.NewsTag,
                                    a.NewsAuthor,
                                    a.NewsSort,
                                    a.NewsDate,
                                    a.NewsType,
                                    a.ProvinceId,
                                    a.CityId,
                                    a.CountyId,
                                    a.ViewTimes");
            if (bNewsContent)
            {
                strSql.Append(",a.NewsContent");
            }
            strSql.Append(@" FROM SysNews a WHERE 1 = 1 and a.BaseIsDelete = @BaseIsDelete ");
            var parameter = new List<DbParameter>();
            parameter.Add(DbParameterExtension.CreateDbParameter("@BaseIsDelete", (int)IsDeleteEnum.No, dbConnectType));
            if (param != null)
            {
                if (!string.IsNullOrEmpty(param.NewsTitle))
                {
                    strSql.Append(" AND a.NewsTitle like @NewsTitle");
                    parameter.Add(DbParameterExtension.CreateDbParameter("@NewsTitle", '%' + param.NewsTitle + '%', dbConnectType));
                }
                if (param.NewsType > 0)
                {
                    strSql.Append(" AND a.NewsType = @NewsType");
                    parameter.Add(DbParameterExtension.CreateDbParameter("@NewsType", param.NewsType, dbConnectType));
                }
                if (!string.IsNullOrEmpty(param.NewsTag))
                {
                    strSql.Append(" AND a.NewsTag like @NewsTag");
                    parameter.Add(DbParameterExtension.CreateDbParameter("@NewsTag", '%' + param.NewsTag + '%', dbConnectType));
                }
                if (!param.ProvinceId.IsNullOrZero())
                {
                    strSql.Append(" AND a.ProvinceId = @ProvinceId");
                    parameter.Add(DbParameterExtension.CreateDbParameter("@ProvinceId", param.ProvinceId, dbConnectType));
                }
                if (!param.CityId.IsNullOrZero())
                {
                    strSql.Append(" AND a.CityId = @CityId");
                    parameter.Add(DbParameterExtension.CreateDbParameter("@CityId", param.CityId, dbConnectType));
                }
                if (!param.CountyId.IsNullOrZero())
                {
                    strSql.Append(" AND a.CountyId = @CountyId");
                    parameter.Add(DbParameterExtension.CreateDbParameter("@CountyId", param.CountyId, dbConnectType));
                }
            }
            return parameter;
        }

        /// <summary>
        /// 列表条件过滤
        /// 建议该方法放在Partial部分类中，因为代码生成时当前类会被覆盖（该方法在生成时将会被注释）
        /// </summary>
        /// <param name="param"></param>
        /// <returns></returns>
        private Expression<Func<NewsEntity, bool>> ListFilterPartial(NewsListParam param)
        {
            var expression = LinqExtensions.True<NewsEntity>();
            expression = expression.And(t => t.BaseIsDelete == (int)IsDeleteEnum.No);
            if (param != null)
            {
            }
            return expression;
        }
        #endregion
    }
}