using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace FCOMMON
{
    public static class DBM
    {
        public static System.Data.SqlClient.SqlConnection getCn()
        {
            string cs = FCOMMON.info.CS;
            System.Data.SqlClient.SqlConnection cn = new System.Data.SqlClient.SqlConnection();
            cn.ConnectionString = cs;
            return cn;
        }

        public struct sItemInfo
        {
            public int idx;
            public string sid;
            public string model;
            public string supply;
        }

        public static sItemInfo getItemInfo(int idx)
        {
            var cn = getCn();
            cn.Open();

            var retval = new sItemInfo();
            retval.idx = -1;

            string sql = "select * from Items where idx = " + idx.ToString();
            var cmd = new System.Data.SqlClient.SqlCommand(sql, cn);
            var rdr = cmd.ExecuteReader();
            while(rdr.Read())
            {
                retval.idx = (int)rdr["idx"];
                if(rdr["sid"] != DBNull.Value) retval.sid = rdr["sid"].ToString();
                if (rdr["model"] != DBNull.Value) retval.model = rdr["model"].ToString();
                if (rdr["supply"] != DBNull.Value) retval.supply = rdr["supply"].ToString();
            }

            cn.Close();
            cn.Dispose();
            return retval;
        }
        public static Dictionary<string,string> getUserList(int baseLevel  = 1)
        {
            string where = "isnull(level,0) >= " + baseLevel.ToString();
            return getTwoColumnList("Users", "id", "name", where, "name");

        }
        public static System.Data.DataTable getUserTable(int baseLevel = 1)
        {
            var list = getUserList(baseLevel);
            return MakeDataTable(list);
        }

        private static Dictionary<string,string> MakeDataTable(List<string> list)
        {
            var retval = new Dictionary<string, string>();
            foreach (var item in list)
                retval.Add(item, item);
            return retval;
        }
        private static System.Data.DataTable MakeDataTable(Dictionary<string,string> list)
        {
            System.Data.DataTable dt = new System.Data.DataTable();
            dt.Columns.Add("Key");
            dt.Columns.Add("Value");
            dt.Columns.Add("KeyValue");

            foreach (var item in list)
            {
                dt.Rows.Add(new string[] { item.Key, item.Value, string.Format("[{0}] {1}", item.Key, item.Value) });
            }
            dt.AcceptChanges();
            return dt;
        }

        public static Dictionary<string, string> getProjectList(string StateCode = "")
        {
            string where = "status = '{0}'";
            if (StateCode != "") where = string.Format(where, StateCode);
            else where = string.Empty;

            return getTwoColumnList("Projects", "idx", "name", where, "status,name");
        }
        public static System.Data.DataTable getProjectData(string StateCode = "")
        {
            var list = getProjectList(StateCode);
            return MakeDataTable(list);
        }
      public static Dictionary<string,string> getCodeList(string GroupCode="99")
        {
            string where = "Grp = '{0}'";
            where = string.Format(where, GroupCode);
            return getTwoColumnList("Common", "code", "memo", where, "code");
        }
      public static System.Data.DataTable getCodeTable(string GroupCode = "99")
      {
          var list = getCodeList(GroupCode);
          return MakeDataTable(list);
      }
        private static Dictionary<string, string> getTwoColumnList(string table,string col1,string col2,string where="",string order="")
        {
            Dictionary<string, string> retval = new Dictionary<string, string>();
            var cn = getCn();
            cn.Open();
            var sql = "select isnull({1},''),isnull({2},'')" +
                " from {0}";
            if (where != "") sql += " where " +  where;
            if (order != "") sql += " order by " + order;
            sql = string.Format(sql,table, col1, col2);
            var cmd = new System.Data.SqlClient.SqlCommand(sql, cn);
            var rdr = cmd.ExecuteReader();
            while (rdr.Read())
            {
                retval.Add(rdr[0].ToString(), rdr[1].ToString());
            }
            cmd.Dispose();
            cn.Close();
            cn.Dispose();
            return retval;

        }
        public static Dictionary<string,string> getGroupTable(string GroupColumn, string table, string where = "", Boolean desc = false)
        {
            var list = getGroupList(GroupColumn, table, where, desc);
            return MakeDataTable(list);
        }
        public static List<String> getGroupList(string GroupColumn, string table, string where = "",Boolean desc=false)
        {
            List<string> retval = new List<string>();
            var cn = getCn();
            cn.Open();
            var sql = "select {0} " +
                " from {1} " +
                " where isnull({0},'') != '' ";

            if (where != "") sql += " and " + where;

            sql += " group by {0} " +
                   " order by {0} ";
            if (desc) sql += " desc";

            sql = string.Format(sql, "[" + GroupColumn + "]", table);
            var cmd = new System.Data.SqlClient.SqlCommand(sql, cn);
            var rdr = cmd.ExecuteReader();
            while (rdr.Read())
            {
                retval.Add(rdr[0].ToString());
            }
            cmd.Dispose();
            cn.Close();
            cn.Dispose();
            return retval;
        }
        public static List<String> getDateList(string table, string where = "",Boolean desc =false)
        {
            return getGroupList("pdate", table, where,desc);
        }
    }
}