using MySqlConnector;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Dapper;
using CliFx;
using CliFx.Infrastructure;
using CliFx.Attributes;
using System.Data;
using System.Data.Common;
using Chenfeng.MES.Archiver.Core;
using Chenfeng.MES.Archiver.Data;

namespace Chenfeng.MES.Archiver.Commands
{
    [Command("copy")]
    public class CopyTableCommand : ICommand,IArchiveReader
    {
        [CommandOption("connection", Description = "数据库连接")]
        public string Connection { get; set; } = "";

        public string TableSuffix { get; set; } = "new";

        public DbConnection? Db { get; private set; }

        public Action<string> Print { get; set; } = (text) => { };

        [CommandOption("legacy", Description = "旧版MES")]
        public bool Legacy { get; set; } = false;

        [CommandOption("replace", Description = "替换表")]
        public bool Replace { get; set; } = false;

        [CommandOption("restore", Description = "回复表")]
        public bool Restore { get; set; } = false;

        [CommandOption("rm-backup", Description = "删除备份表")]
        public bool RemoveBackup { get; set; }

        [CommandOption("timeout", Description = "sql命令超时时间")]
        public int Timeout { get; set; } = 3;

        [CommandOption("script", Description = "是否生成执行脚本")]
        public bool Script { get; set; }

        public ValueTask ExecuteAsync(IConsole console)
        {
            Print = (text) => console.Output.WriteLine($"{DateTime.Now.ToLongTimeString()} {text}");

            var starMonth = DateTime.Now.AddMonths(-12).ToString("yyyyMM");

            SqlMapper.Settings.CommandTimeout = 60 * Timeout;
            var executeType = "copy";
            if (RemoveBackup)
            {
                executeType = "rm_bak";
                console.Output.WriteLine("删除备份表");
            }
            else if (Restore)
            {
                executeType = "restore";
                console.Output.WriteLine("还原备份表");
            }
            else
            {
                console.Output.WriteLine($"拷贝"+( Legacy ? "旧" :"新")+"版表数据"+(Replace?"并替换":""));
            }

            try
            {
                if (this.Connection.Length > 0)
                {
                    var connBuilder = new MySqlConnectionStringBuilder(this.Connection);
                    connBuilder.SslMode = MySqlSslMode.None;
                    connBuilder.CharacterSet = "utf8";
                    Db = new MySqlConnection(connBuilder.ConnectionString);
                }
               
                Db?.Open();
                if (Legacy)
                {
                    TableQueryHelper.MesLegacyTables(this,starMonth);
                }
                else
                {
                    TableQueryHelper.MesTables(this,starMonth);
                }

                if (Script)
                {
                    if (Directory.Exists("./scripts")==false)
                    {
                        Directory.CreateDirectory("./scripts");
                    }
                    using (var file = File.OpenWrite($"./scripts/mes{(Legacy?"-legacy":"")}-table-{executeType}.sql"))
                    {
                        using (var writer = new StreamWriter(file))
                        {
                            writer.Write(sqlScripts);
                        }
                    }
                        
                }

                Print("操作成功");

            }
            catch (Exception ex)
            {
                console.Output.WriteLine(ex.ToString());
            }
            finally
            {
                Db?.Close();
            }

            return default;
        }

        public void ExecuteData(string table, string where, object param)
        {
            ExecuteSql($"INSERT INTO `{TableDic[table]}` SELECT * FROM `{table}` WHERE {where}", param);
        }

        public void ExecuteChildData(string table, string parentTable, string condition)
        {
            ExecuteSql($"INSERT INTO `{TableDic[table]}`  SELECT child.* FROM `{TableDic[parentTable]}` parent join `{table}` child on {condition} ");
        }

        private StringBuilder sqlScripts = new StringBuilder();
        private void ExecuteSql(string sql, object param = null) 
        {
            Db?.Execute(sql,param);
            if (Script)
            {
                var fullSql = sql + ";";
                if(param != null)
                {
                    foreach (var property in param.GetType().GetProperties())
                    {
                        var val = property.GetValue(param)?.ToString();
                        fullSql =fullSql.Replace("@" + property.Name, val);
                    }
                }
                sqlScripts.AppendLine(fullSql);
            }
            
        }


        public Dictionary<string,string> TableDic { get; set; } = new Dictionary<string,string>();

        public void Step(Action<string> action, params string[] tables)
        {
            var list = tables.Select(table => new
            {
                Table = table,
                NewTable = table + "_" + this.TableSuffix
            });

            foreach (var item in list)
            {
                if (RemoveBackup)
                {
                    ExecuteSql($"DROP TABLE IF EXISTS `{item.Table}_bak`");
                }
                else if (Restore)
                {
                    ExecuteSql($"DROP TABLE IF EXISTS `{item.Table}`");
                    ExecuteSql($"RENAME TABLE `{item.Table}_bak` TO `{item.Table}`");
                }
                else
                {
                    TableDic[item.Table] = item.NewTable;

                    ExecuteSql($"DROP TABLE IF EXISTS `{item.NewTable}`");
                    ExecuteSql($"CREATE TABLE `{item.NewTable}` LIKE `{item.Table}`"); // IF NOT EXISTS

                    Print(item.NewTable + " 创建完成");
                    action(item.Table);
                    Print(item.NewTable + " 拷贝完成");

                    if (Replace)
                    {
                        ExecuteSql($"RENAME TABLE `{item.Table}` TO `{item.Table}_bak`");
                        ExecuteSql($"RENAME TABLE `{item.NewTable}` TO `{item.Table}`");
                    }
                }
            }
        }
    }
}