using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using OpenAuth.App.Request;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OpenAuth.App.Common
{
    public class CommonData
    {
        private ISqlSugarClient db;

        public CommonData(ISqlSugarClient client)
        {
            db = client;
        }

        /// <summary>
        /// 执行cmd命令
        /// </summary>
        /// <param name="strDir"></param>
        /// <param name="_path"></param>
        public static void ExeCmdProcess(string strDir, string _path)
        {
            Process p = new Process();
            p.StartInfo.FileName = "cmd.exe ";
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.CreateNoWindow = false;

            //指定执行程序的目录
            p.StartInfo.WorkingDirectory = _path;
            //开始执行
            p.Start();
            //Console.WriteLine("command:" + strInput);
            p.StandardInput.WriteLine(strDir.ToString() + "&exit");

            //执行结果返回
            string output = p.StandardOutput.ReadToEnd();

            //等待执行完成
            p.WaitForExit();

            //关闭程序
            p.Close();
        }



        /// <summary>
        /// Pgsql获取GeoJson数据
        /// </summary>
        /// <param name="req"></param>
        /// <param name="_configuration"></param>
        /// <returns></returns>
        public JToken PgsqlGeoJsonCommon(QueryGeoJsonCommonReq req)
        {
            //如果有的参数为空，设置参数的默认值
            req.init();

            //查询列的数据
            StringBuilder sqlColumn = new StringBuilder();
            sqlColumn.AppendFormat(" select {1} from {0} {3} order by \"{2}\"", req.tablename, req.column, req.order, req.where);

            StringBuilder sqlGeo = new StringBuilder();
            sqlGeo.AppendFormat(" select st_asgeojson(\"{0}\") geom from \"{1}\" {3} order by \"{2}\"", req.geom, req.tablename, req.order, req.where);

            return PgsqlGeoJsonCommon(sqlColumn, sqlGeo, req.pageIndex, req.limit);
        }


        /// <summary>
        /// 查询GeoJson公共方法
        /// </summary>
        /// <param name="sqlColumn"></param>
        /// <param name="sqlGeom"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <param name="_configuration"></param>
        /// <returns></returns>
        public JToken PgsqlGeoJsonCommon(StringBuilder sqlColumn, StringBuilder sqlGeom, int pageIndex, int pageSize)
        {
            //获取到数据库操作实例
            int total = 0;
            int totalPage = 0;

            //查询列
            var dt_properties = db.SqlQueryable<dynamic>(sqlColumn.ToString()).ToPageList(pageIndex, pageSize, ref total, ref totalPage);
            //列数据转换为字符串
            string str_properties = JsonConvert.SerializeObject(dt_properties);
            //列数据转换为json对象
            JToken jtoken_properties = (JToken)JsonConvert.DeserializeObject(str_properties);

            //查询geojson数据
            var dt_geom = db.SqlQueryable<dynamic>(sqlGeom.ToString()).ToDataTablePage(pageIndex, pageSize);

            //组装最终数据
            JObject obj = new JObject();
            JArray array = new JArray();
            obj.Add("type", "FeatureCollection");
            obj.Add("totalNumber", total);
            obj.Add("totalPage", totalPage);
            //遍历geojson数据
            for (var i = 0; i < dt_geom.Rows.Count; i++)
            {
                //行数据
                DataRow item = dt_geom.Rows[i];
                //单条geojson
                string _geom = item["geom"] == DBNull.Value ? "" : item["geom"].ToString();
                //给数据赋值
                JObject featureObj = new JObject();
                featureObj.Add("type", "Feature");
                featureObj.Add("geometry", (JToken)JsonConvert.DeserializeObject(_geom));
                featureObj.Add("properties", jtoken_properties[i]);
                //添加到数组
                array.Add(featureObj);
            }
            obj.Add("features", array);
            return obj;

        }

        public string GetMaxKeyVal(string _column, string tablename, int _gid_const)
        {
            string _val = "";
            //查询最大的gid
            var column_list = SearchColumnsList(tablename);
            string _type = column_list[0].column_type;
            if (_type != "integer")
            {
                _val = Guid.NewGuid().ToString();
                return _val;
            }

            var _maxgid = db.SqlQueryable<dynamic>($"SELECT max(\"{_column}\") \"maxGid\" FROM \"{tablename}\" where \"{_column}\" < 6000000").First().maxGid;
            //gid为空时，说明一条数据都没有
            if (_maxgid == null)
                _val = _gid_const.ToString();
            else
            {
                //如果大于设定值，在此基础上加一，否则设置为默认值
                if (_maxgid >= _gid_const)
                    _val = (_maxgid + 1).ToString();
                else
                    _val = _gid_const.ToString();
            }
            return _val;

        }

        /// <summary>
        /// 获取列名
        /// </summary>
        /// <param name="tablename"></param>
        /// <returns></returns>
        public List<dynamic> SearchColumnsList(string tablename)
        {
            //查询列名和注释描述
            StringBuilder columnSql = new StringBuilder();
            columnSql.AppendFormat(@$"  SELECT a.attname column_name,col_description(a.attrelid,a.attnum) as description,format_type(a.atttypid,a.atttypmod) as column_type
                                            FROM pg_class as c,pg_attribute as a 
                                            where c.relname = '{tablename}' 
                                                and a.attrelid = c.oid 
                                                and a.attnum>0 
                                                and attstattarget = -1");
            //查询结果

            var column_list = db.SqlQueryable<dynamic>(columnSql.ToString()).ToList();
            return column_list;

        }

    }
}