using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.Common;
using System.Data.SQLite;

namespace Kingo.Plugin.ShapeToKOApp.Helper
{
    public static class SQLiteHelper
    {

        public static int ExecuteNonQuery(string connectionString, SQLiteCommand cmd)
        {
            int result = 0;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            using (SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString))
            {
                SQLiteTransaction sqliteTransaction = null;
                SQLiteHelper.PrepareCommand(cmd, sqliteConnection, ref sqliteTransaction, true, cmd.CommandType, cmd.CommandText, new SQLiteParameter[0]);
                try
                {
                    result = cmd.ExecuteNonQuery();
                    sqliteTransaction.Commit();
                }
                catch (Exception ex)
                {
                    sqliteTransaction.Rollback();
                    throw ex;
                }
            }
            return result;
        }


        public static int ExecuteNonQuery(string connectionString, string commandText, CommandType commandType)
        {
            int result = 0;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            SQLiteCommand sqliteCommand = new SQLiteCommand();
            using (SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString))
            {
                SQLiteTransaction sqliteTransaction = null;
                SQLiteHelper.PrepareCommand(sqliteCommand, sqliteConnection, ref sqliteTransaction, true, commandType, commandText, new SQLiteParameter[0]);
                try
                {
                    result = sqliteCommand.ExecuteNonQuery();
                    sqliteTransaction.Commit();
                }
                catch (Exception ex)
                {
                    sqliteTransaction.Rollback();
                    throw ex;
                }
            }
            return result;
        }


        public static int ExecuteNonQuery(string connectionString, string commandText, CommandType commandType, params SQLiteParameter[] cmdParms)
        {
            int result = 0;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            SQLiteCommand sqliteCommand = new SQLiteCommand();
            using (SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString))
            {
                SQLiteTransaction sqliteTransaction = null;
                SQLiteHelper.PrepareCommand(sqliteCommand, sqliteConnection, ref sqliteTransaction, true, commandType, commandText, new SQLiteParameter[0]);
                try
                {
                    result = sqliteCommand.ExecuteNonQuery();
                    sqliteTransaction.Commit();
                }
                catch (Exception ex)
                {
                    sqliteTransaction.Rollback();
                    throw ex;
                }
            }
            return result;
        }


        public static object ExecuteScalar(string connectionString, SQLiteCommand cmd)
        {
            object result = 0;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            using (SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString))
            {
                SQLiteTransaction sqliteTransaction = null;
                SQLiteHelper.PrepareCommand(cmd, sqliteConnection, ref sqliteTransaction, true, cmd.CommandType, cmd.CommandText, new SQLiteParameter[0]);
                try
                {
                    result = cmd.ExecuteScalar();
                    sqliteTransaction.Commit();
                }
                catch (Exception ex)
                {
                    sqliteTransaction.Rollback();
                    throw ex;
                }
            }
            return result;
        }


        public static object ExecuteScalar(string connectionString, string commandText, CommandType commandType)
        {
            object result = 0;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            SQLiteCommand sqliteCommand = new SQLiteCommand();
            using (SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString))
            {
                SQLiteTransaction sqliteTransaction = null;
                SQLiteHelper.PrepareCommand(sqliteCommand, sqliteConnection, ref sqliteTransaction, true, commandType, commandText, new SQLiteParameter[0]);
                try
                {
                    result = sqliteCommand.ExecuteScalar();
                    sqliteTransaction.Commit();
                }
                catch (Exception ex)
                {
                    sqliteTransaction.Rollback();
                    throw ex;
                }
            }
            return result;
        }


        public static object ExecuteScalar(string connectionString, string commandText, CommandType commandType, params SQLiteParameter[] cmdParms)
        {
            object result = 0;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            SQLiteCommand sqliteCommand = new SQLiteCommand();
            using (SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString))
            {
                SQLiteTransaction sqliteTransaction = null;
                SQLiteHelper.PrepareCommand(sqliteCommand, sqliteConnection, ref sqliteTransaction, true, commandType, commandText, new SQLiteParameter[0]);
                try
                {
                    result = sqliteCommand.ExecuteScalar();
                    sqliteTransaction.Commit();
                }
                catch (Exception ex)
                {
                    sqliteTransaction.Rollback();
                    throw ex;
                }
            }
            return result;
        }

        public static DbDataReader ExecuteReader(string connectionString, SQLiteCommand cmd)
        {
            DbDataReader result = null;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            SQLiteConnection conn = new SQLiteConnection(connectionString);
            SQLiteTransaction sqliteTransaction = null;
            SQLiteHelper.PrepareCommand(cmd, conn, ref sqliteTransaction, false, cmd.CommandType, cmd.CommandText, new SQLiteParameter[0]);
            try
            {
                result = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return result;
        }

        public static DbDataReader ExecuteReader(string connectionString, string commandText, CommandType commandType)
        {
            DbDataReader result = null;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            SQLiteConnection conn = new SQLiteConnection(connectionString);
            SQLiteCommand sqliteCommand = new SQLiteCommand();
            SQLiteTransaction sqliteTransaction = null;
            SQLiteHelper.PrepareCommand(sqliteCommand, conn, ref sqliteTransaction, false, commandType, commandText, new SQLiteParameter[0]);
            try
            {
                result = sqliteCommand.ExecuteReader(CommandBehavior.CloseConnection);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return result;
        }

        public static DbDataReader ExecuteReader(string connectionString, string commandText, CommandType commandType, params SQLiteParameter[] cmdParms)
        {
            DbDataReader result = null;
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            SQLiteConnection conn = new SQLiteConnection(connectionString);
            SQLiteCommand sqliteCommand = new SQLiteCommand();
            SQLiteTransaction sqliteTransaction = null;
            SQLiteHelper.PrepareCommand(sqliteCommand, conn, ref sqliteTransaction, false, commandType, commandText, cmdParms);
            try
            {
                result = sqliteCommand.ExecuteReader(CommandBehavior.CloseConnection);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return result;
        }


        public static DataSet ExecuteDataSet(string connectionString, SQLiteCommand cmd)
        {
            DataSet dataSet = new DataSet();
            SQLiteConnection conn = new SQLiteConnection(connectionString);
            SQLiteTransaction sqliteTransaction = null;
            SQLiteHelper.PrepareCommand(cmd, conn, ref sqliteTransaction, false, cmd.CommandType, cmd.CommandText, new SQLiteParameter[0]);
            try
            {
                SQLiteDataAdapter sqliteDataAdapter = new SQLiteDataAdapter(cmd);
                sqliteDataAdapter.Fill(dataSet);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (cmd.Connection != null)
                {
                    if (cmd.Connection.State == ConnectionState.Open)
                    {
                        cmd.Connection.Close();
                    }
                }
            }
            return dataSet;
        }


        public static DataSet ExecuteDataSet(string connectionString, string commandText, CommandType commandType)
        {
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            DataSet dataSet = new DataSet();
            SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString);
            SQLiteCommand cmd = new SQLiteCommand();
            SQLiteTransaction sqliteTransaction = null;
            SQLiteHelper.PrepareCommand(cmd, sqliteConnection, ref sqliteTransaction, false, commandType, commandText, new SQLiteParameter[0]);
            try
            {
                SQLiteDataAdapter sqliteDataAdapter = new SQLiteDataAdapter(cmd);
                sqliteDataAdapter.Fill(dataSet);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (sqliteConnection != null)
                {
                    if (sqliteConnection.State == ConnectionState.Open)
                    {
                        sqliteConnection.Close();
                    }
                }
            }
            return dataSet;
        }


        public static DataSet ExecuteDataSet(string connectionString, string commandText, CommandType commandType, params SQLiteParameter[] cmdParms)
        {
            if (connectionString == null || connectionString.Length == 0)
            {
                throw new ArgumentNullException("connectionString");
            }
            if (commandText == null || commandText.Length == 0)
            {
                throw new ArgumentNullException("commandText");
            }
            DataSet dataSet = new DataSet();
            SQLiteConnection sqliteConnection = new SQLiteConnection(connectionString);
            SQLiteCommand cmd = new SQLiteCommand();
            SQLiteTransaction sqliteTransaction = null;
            SQLiteHelper.PrepareCommand(cmd, sqliteConnection, ref sqliteTransaction, false, commandType, commandText, cmdParms);
            try
            {
                SQLiteDataAdapter sqliteDataAdapter = new SQLiteDataAdapter(cmd);
                sqliteDataAdapter.Fill(dataSet);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (sqliteConnection != null)
                {
                    if (sqliteConnection.State == ConnectionState.Open)
                    {
                        sqliteConnection.Close();
                    }
                }
            }
            return dataSet;
        }


        public static DataTable SelectPaging(string connString, string tableName, string strColumns, string strWhere, string strOrder, int pageSize, int currentIndex, out int recordOut)
        {
            DataTable dataTable = new DataTable();
            recordOut = Convert.ToInt32(SQLiteHelper.ExecuteScalar(connString, "select count(*) from " + tableName, CommandType.Text));
            string format = "select {0} from {1} where {2} order by {3} limit {4} offset {5} ";
            int num = (currentIndex - 1) * pageSize;
            string commandText = string.Format(format, new object[]
            {
                strColumns,
                tableName,
                strWhere,
                strOrder,
                pageSize.ToString(),
                num.ToString()
            });
            using (DbDataReader dbDataReader = SQLiteHelper.ExecuteReader(connString, commandText, CommandType.Text))
            {
                if (dbDataReader != null)
                {
                    dataTable.Load(dbDataReader);
                }
            }
            return dataTable;
        }


        private static void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn, ref SQLiteTransaction trans, bool useTrans, CommandType cmdType, string cmdText, params SQLiteParameter[] cmdParms)
        {
            if (conn.State != ConnectionState.Open)
            {
                conn.Open();
            }
            cmd.Connection = conn;
            cmd.CommandText = cmdText;
            if (useTrans)
            {
                trans = conn.BeginTransaction(IsolationLevel.ReadCommitted);
                cmd.Transaction = trans;
            }
            cmd.CommandType = cmdType;
            if (cmdParms != null)
            {
                foreach (SQLiteParameter parameter in cmdParms)
                {
                    cmd.Parameters.Add(parameter);
                }
            }
        }
    }
}