using MySql.Data.MySqlClient;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace BaseLibDataProcess
{
    public class ClsMysql
    {
        private readonly string IP = null;
        private readonly string User = null;
        private readonly string Password = null;
        private readonly string dbName = null;
        private readonly string Port = null;
        private readonly string Charset = "utf8";
        public ClsMysql(string ip, string port, string user, string pwd, string dbname,string charset= "utf8")
        {
            IP = ip;
            Port = port;
            User = user;
            Password = pwd;
            dbName = dbname;
            Charset = charset;
        }

        public bool CreateDataBase()
        {
            try
            {
                if (!ExistDatabase(dbName.ToLower()))
                {
                    if (Create_database(dbName.ToLower()))
                    {
                        return true;
                    }
                }
                else
                {
                    return true;
                }
                return false;
            }
            catch (Exception ex)
            {
                MessageBox.Show($"创建数据库{dbName}失败\r\nFailed to create database\r\n{ex.Message}", "Error");
                return false;
            }

        }
        public MySqlConnection GetMySqlConnector(string m_userid, string m_password)
        {
            //string strcon = string.Format("Data Source={2};Persist Security Info=yes;UserId={0}; PWD={1};port={3}", m_userid, m_password, IP, Port,dbName);
            string strcon = $"Data Source={IP};Persist Security Info=yes;UserId={m_userid}; PWD={m_password};port={Port}";
            MySqlConnection con = new MySqlConnection(strcon);

            return con;

        }
        public bool ExistDatabase(string basename)
        {
            bool flag = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            MySqlDataReader dr = null;
            StringBuilder str_builder = new StringBuilder();
            string str = "select * from information_schema.SCHEMATA where SCHEMA_NAME=";
            str_builder.Append(str);
            str_builder.Append("'");
            str_builder.Append(basename);
            str_builder.Append("'");
            string sql_str = str_builder.ToString();
            try
            {
                con = GetMySqlConnector(User, Password);
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(sql_str, con);
                dr = cmd.ExecuteReader();
                while (dr.Read())
                {
                    if (dr.GetString(1).ToString() == basename)
                    {
                        flag = true;
                        break;
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"{ex.Message}", "Database Error");
            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();
            }

            return flag;
        }
        public bool Create_database(string basename)
        {
            bool result = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            string sql_str = "Create Database " + basename;
            try
            {
                con = GetMySqlConnector(User, Password);
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(sql_str, con);
                cmd.ExecuteNonQuery();
                result = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show($"创建数据库失败\r\n{ex.Message}","Error");
                result = false;
            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();
            }
            return result;

        }
        public MySqlConnection GetMySqlConnector()
        {
            string m_str_con = string.Format("server={0};user id={1}; password={2};database={3};port={4};charset={5}", IP, User, Password, dbName, Port, Charset);
            MySqlConnection con = new MySqlConnection(m_str_con);
            return con;
        }
        public bool DeleteRow(string strTable,string strItem,string strValue)
        {
            bool result = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            try
            {
                StringBuilder str_builder = new StringBuilder();
                str_builder.Append("delete  from  ");
                str_builder.Append(strTable);
                str_builder.Append($" where {strItem}=");
                str_builder.Append("'");
                str_builder.Append(strValue);
                str_builder.Append("'");
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(str_builder.ToString(), con);
                cmd.ExecuteNonQuery();
                result = true;
            }
            catch(Exception ex)
            {
                MessageBox.Show($"删除数据库数据失败\r\nFailed to delete the data of database\r\n{ex.Message}", "Error");
            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();
            }
            return result;
        }
        public int Getrecords(string m_str)
        {
            int result = -1;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            try
            {
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(m_str, con);
                result = Convert.ToInt32(cmd.ExecuteScalar());

            }
            catch
            {

            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();
            }
            return result;
        }
        //public bool InsertData(string tablename, Dictionary<int, ContentInfo> _dic)
        //{
        //    bool result = false;
        //    MySqlConnection con = null;
        //    MySqlCommand cmd = null;
        //    try
        //    {
        //        int m = _dic.Count;
        //        StringBuilder str_builder = new StringBuilder();
        //        str_builder.Append("Insert into ");
        //        str_builder.Append(tablename);
        //        str_builder.Append(" (");
        //        for (int i = 0; i < m; i++)
        //        {
        //            ContentInfo m_contentInfo = null;
        //            if (_dic.TryGetValue(i, out m_contentInfo))
        //            {
        //                str_builder.Append(m_contentInfo.str_field);
        //                if (i < (m - 1))
        //                {
        //                    str_builder.Append(",");
        //                }
        //                if (i == (m - 1))
        //                {
        //                    str_builder.Append(") ");
        //                }
        //            }
        //        }
        //        str_builder.Append(" values( ");
        //        for (int i = 0; i < m; i++)
        //        {
        //            ContentInfo m_contentInfo = null;
        //            if (_dic.TryGetValue(i, out m_contentInfo))
        //            {
        //                str_builder.Append("'");
        //                str_builder.Append(m_contentInfo.obj_content);
        //                str_builder.Append("'");
        //                if (i == (m - 1))
        //                {
        //                    str_builder.Append(" )");

        //                }
        //                if (i < (m - 1))
        //                {
        //                    str_builder.Append(",");
        //                }
        //            }
        //        }
        //        string m_str = str_builder.ToString();
        //        con = GetMySqlConnector();
        //        if (con.State == ConnectionState.Closed)
        //        {
        //            con.Open();
        //        }
        //        cmd = new MySqlCommand(m_str, con);
        //        cmd.ExecuteNonQuery();
        //        result = true;
        //    }
        //    catch (Exception ex)
        //    {
        //        MessageBox.Show($"插入数据到数据库失败{ex.Message}", "Error");
        //        // Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：InsertData");
        //    }
        //    finally
        //    {
        //        if (cmd != null)
        //        {
        //            cmd.Dispose();
        //        }
        //        if (con != null && con.State != ConnectionState.Open)
        //        {
        //            con.Close();
        //        }
        //        con.Dispose();
        //    }
        //    return result;

        //}
        public bool InsertData(string tablename, string strItem,string strValue)
        {
            bool result = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            try
            {
                StringBuilder str_builder = new StringBuilder();
                str_builder.Append("Insert into ");
                str_builder.Append(tablename);
                str_builder.Append(" (");
                str_builder.Append(strItem);
                str_builder.Append(") ");
                str_builder.Append(" values( ");
                for (int i = 0; i < strValue.Split(',').Length; i++)
                {
                    if (i== strValue.Split(',').Length-1)
                    {
                        str_builder.Append($"'{strValue.Split(',')[i]}'");
                    }
                    else
                    {
                        str_builder.Append($"'{strValue.Split(',')[i]}',");
                    }
                    
                }
                str_builder.Append(" )");
                string m_str = str_builder.ToString();
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(m_str, con);
                cmd.ExecuteNonQuery();
                result = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show($"插入数据到数据库失败\r\nFailed to insert data to database\r\n{ex.Message}", "Error");
                // Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：InsertData");
            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();
            }
            return result;

        }
        //public bool UpdateData(string tablename, Dictionary<int, ContentInfo> _dic, ContentInfo _condition)
        //{
        //    bool result = false;
        //    MySqlConnection con = null;
        //    MySqlCommand cmd = null;
        //    try
        //    {
        //        int m = _dic.Count;
        //        StringBuilder str_builder = new StringBuilder();
        //        str_builder.Append("update ");
        //        str_builder.Append(tablename);
        //        str_builder.Append(" set ");

        //        for (int i = 0; i < m; i++)
        //        {
        //            ContentInfo m_contentInfo = null;
        //            if (_dic.TryGetValue(i, out m_contentInfo))
        //            {
        //                str_builder.Append(m_contentInfo.str_field);
        //                str_builder.Append("=");
        //                str_builder.Append("'");
        //                str_builder.Append(m_contentInfo.obj_content);
        //                str_builder.Append("'");

        //                if (i < (m - 1))
        //                {
        //                    str_builder.Append(",");
        //                }
        //            }
        //        }
        //        str_builder.Append(" where ");
        //        str_builder.Append(_condition.str_field);
        //        str_builder.Append("=");
        //        str_builder.Append("'");
        //        str_builder.Append(_condition.obj_content);
        //        str_builder.Append("'");
        //        string m_str = str_builder.ToString();
        //        con = GetMySqlConnector();
        //        if (con.State == ConnectionState.Closed)
        //        {
        //            con.Open();
        //        }
        //        cmd = new MySqlCommand(m_str, con);
        //        cmd.ExecuteNonQuery();
        //        result = true;
        //    }
        //    catch
        //    {
        //        //  Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：UpdateData");
        //    }
        //    finally
        //    {
        //        if (cmd != null)
        //        {
        //            cmd.Dispose();
        //        }
        //        if (con != null && con.State != ConnectionState.Open)
        //        {
        //            con.Close();
        //        }
        //        con.Dispose();
        //    }
        //    return result;

        //}

        public bool UpdateData(string tablename, string strItem,string strValue, string strKeyItem,string strKeyValue)
        {
            if (strItem.Split(',').Length!= strValue.Split(',').Length)
            {
                MessageBox.Show("更新数据库数据出错\r\nFailed to update database", "Error");
            }
            bool result = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            try
            {
                StringBuilder str_builder = new StringBuilder();
                str_builder.Append("update ");
                str_builder.Append(tablename);
                str_builder.Append(" set ");
                for (int i = 0; i < strItem.Split(',').Length; i++)
                {
                    str_builder.Append(strItem.Split(',')[i]);
                    str_builder.Append("=");
                    str_builder.Append("'");
                    str_builder.Append(strValue.Split(',')[i]);
                    str_builder.Append("'");

                    if (i < (strItem.Split(',').Length - 1))
                    {
                        str_builder.Append(",");
                    }
                }
                str_builder.Append(" where ");
                str_builder.Append(strKeyItem);
                str_builder.Append("=");
                str_builder.Append("'");
                str_builder.Append(strKeyValue);
                str_builder.Append("'");
                string m_str = str_builder.ToString();
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(m_str, con);
                cmd.ExecuteNonQuery();
                result = true;
            }
            catch(Exception ex)
            {
                MessageBox.Show($"更新数据库数据出错\r\nFailed to update database\r\n{ex.Message}", "Error");
            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();
            }
            return result;

        }
        public DataTable InquireData(string strTable,string strItem,string strValue)
        {
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            MySqlDataReader dr = null;
            DataTable dt = new DataTable();
            try
            {
                StringBuilder str_builder = new StringBuilder();
                str_builder.Append("select * from  ");
                str_builder.Append(strTable);
                str_builder.Append($" where {strItem}=");
                str_builder.Append("'");
                str_builder.Append(strValue);
                str_builder.Append("'");

                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(str_builder.ToString(), con);
                dr = cmd.ExecuteReader();
                for (int i = 0; i < dr.FieldCount; i++)
                {
                    dt.Columns.Add(dr.GetName(i));
                }
                while (dr.HasRows && dr.Read())
                {
                    DataRow datarow = dt.Rows.Add();
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        datarow[j] = dr[j];
                    }

                }
            }
            catch
            {
                // Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：ExeQuery");
            }
            finally
            {
                if (dr != null)
                {
                    dr.Dispose();
                }
                if (con.State == ConnectionState.Open)
                {
                    con.Close();
                }
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (dt != null)
                {
                    dt.Dispose();
                }
                con.Dispose();
            }
            return dt;
        }
        public bool CreateTable(string str_tablename, string[] strfields, ushort keyIndex,ushort timeIndex=0)
        {
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            try
            {
                StringBuilder str_builder = new StringBuilder();
                str_builder.Append("Create table if not exists ");
                str_builder.Append(str_tablename);
                str_builder.Append(" ( ");
                for (int i = 0; i < strfields.Length; i++)
                {
                    str_builder.Append(strfields[i]);
                    str_builder.Append(" ");

                    if (i == keyIndex)
                    {
                        str_builder.Append("varchar(100) character set utf8 primary key ");
                    }
                    else if (i == timeIndex)
                    {
                        str_builder.Append("datetime ");
                    }
                    else
                    {
                        str_builder.Append("varchar(100) character set utf8");
                    }

                    if (i == strfields.Length - 1)
                    {
                        str_builder.Append(" )");
                    }
                    else
                    {
                        str_builder.Append(", ");
                    }
                }
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(str_builder.ToString(), con);
                cmd.ExecuteNonQuery();
                return true;
                //    str_builder.Append("(MyRepairOrderID int auto_increment primary key,");
                //str_builder.Append("RepairOrderCode varchar(100) character set utf8 unique ,");
                //str_builder.Append("OrderCode varchar(100) character set utf8 not null,");
                //str_builder.Append("approvedname varchar(100) character set utf8,");
                //str_builder.Append("sendname varchar(100) character set utf8,");
                //str_builder.Append("state varchar(100) character set utf8,");
                //str_builder.Append("standnum varchar(100) not null,");
                //str_builder.Append("m_date date not null,");
                //str_builder.Append("lineside int");
                //str_builder.Append(" )");

            }
            catch (Exception ex) 
            {
                MessageBox.Show($"创建数据库表格失败{ex.Message}", "Database Error");
                return false; 
            }

        }
        public bool ExistTable(string tablename)
        {
            // string str = "select table_name from information_schema.tables where table_name='table_process'";
            StringBuilder str_builder = new StringBuilder();
            str_builder.Append("select table_name from information_schema.tables where table_name=");
            str_builder.Append("'");
            str_builder.Append(tablename);
            str_builder.Append("' and Table_SCHEMA='");
            str_builder.Append(dbName);
            str_builder.Append("'");
            string m_sql = str_builder.ToString();
            bool FLAG = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            MySqlDataReader dr = null;
            try
            {
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(m_sql, con);
                dr = cmd.ExecuteReader();
                if (dr.Read() && dr.HasRows)
                {
                    if (dr["table_name"].ToString() == tablename.ToLower())
                        FLAG = true;
                }
            }
            catch
            {
                //Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：IS_EXIST_TABLE");
                FLAG = false;
            }

            finally
            {
                if (con.State == ConnectionState.Open)
                {
                    con.Close();
                }
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (dr != null)
                {
                    dr.Dispose();
                }
                con.Dispose();
            }
            return FLAG;
        }
        public bool ExistField(string tablename, string field)
        {
            bool result = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            MySqlDataReader dr = null;
            try
            {
                if (ExistTable(tablename))
                {
                    StringBuilder str_builder = new StringBuilder();
                    str_builder.Append("describe ");
                    str_builder.Append(tablename);
                    string m_sql = str_builder.ToString();
                    con = GetMySqlConnector();
                    if (con.State == ConnectionState.Closed)
                    {
                        con.Open();
                    }
                    cmd = new MySqlCommand(m_sql, con);
                    dr = cmd.ExecuteReader();
                    while (dr.Read())
                    {
                        if (dr.GetString("Field").ToString() != null)
                        {
                            if (dr.GetString("Field").ToString() == field)
                            {
                                result = true;
                                break;
                            }
                        }
                    }

                }
            }
            catch
            {
                // Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：IS_EXIST_FILED");
            }
            finally
            {
                if (con.State == ConnectionState.Open)
                {
                    con.Close();
                }
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (dr != null)
                {
                    dr.Dispose();
                }
                con.Dispose();

            }
            return result;
        }
        public bool Add_Column(string tablename, string field)
        {
            bool result = false;
            MySqlConnection con = null;
            MySqlCommand cmd = null;
            StringBuilder str_builder = new StringBuilder();
            str_builder.Append("alter table ");
            str_builder.Append(tablename);
            str_builder.Append(" add Column ");
            str_builder.Append(field);
            str_builder.Append(" varchar(100)");
            string m_sql = str_builder.ToString();
            try
            {
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                cmd = new MySqlCommand(m_sql, con);
                cmd.ExecuteNonQuery();
                result = true;
            }
            catch
            {
                //  Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：Add_Column");
            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();

            }
            return result;
        }

        public DataTable GetDataBaseDT(string dtname)
        {
            DataTable dt = new DataTable();
            MySqlConnection con = null;
            MySqlDataAdapter sda = null;
            string sql_str = "select* from "+ dtname;
            try
            {
                con = GetMySqlConnector();
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                sda = new MySqlDataAdapter(sql_str, con);
                sda.Fill(dt);
                return dt;
            }
            catch (Exception ex)
            {
                MessageBox.Show($"获取数据库数据失败{ex.Message}", "Error");
                return null;
            }
            finally
            {
                if (sda != null)
                {
                    sda.Dispose();
                }
                if (con != null && con.State != ConnectionState.Open)
                {
                    con.Close();
                }
                con.Dispose();
            }

        }
        public void Get_recordsCount(ref int m, string tablename, ContentInfo m_contentinfo)
        {
            if (ExistTable(tablename))
            {
                StringBuilder str_builder = new StringBuilder();
                str_builder.Append("select count(*) from ");
                str_builder.Append(tablename);
                if (m_contentinfo != null)
                {
                    str_builder.Append(" where  ");
                    str_builder.Append(m_contentinfo.str_field);
                    str_builder.Append("=");
                    str_builder.Append("'");
                    str_builder.Append(m_contentinfo.obj_content);
                    str_builder.Append("'");
                }
                string m_sql = str_builder.ToString();
                MySqlConnection con = null;
                MySqlCommand cmd = null;
                try
                {
                    con = GetMySqlConnector();
                    if (con.State == ConnectionState.Closed)
                    {
                        con.Open();
                    }
                    cmd = new MySqlCommand(m_sql, con);
                    m = Convert.ToInt32(cmd.ExecuteScalar());
                }
                catch
                {
                    // Gmodule.Update_exceptionmessage(string.Format("{0:mm:ss}", DateTime.Now) + "类：mySQL,方法：Get_recordsCount");
                }
                finally
                {
                    if (cmd != null)
                    {
                        cmd.Dispose();
                    }
                    if (con != null && con.State != ConnectionState.Open)
                    {
                        con.Close();
                    }
                    con.Dispose();

                }
            }

        }

    }
    public class ContentInfo
    {
        public string str_field;
        public object obj_content;

    }

}