namespace Yw.Service.Unit
{
    /// <summary>
    ///
    /// </summary>
    public class DbFirstHelper
    {
        /// <summary>
        /// 初始化
        /// </summary>
        public static bool Initial(out string msg)
        {
            msg = string.Empty;
            try
            {

                var connectConfig = Yw.Unit.ConfigHelper.DefaultConnectionConfig;
                if (connectConfig == null)
                {
                    msg = "连接配置初始化失败";
                    return false;
                }

                connectConfig.ConfigureExternalServices = new ConfigureExternalServices()
                {
                    EntityService = (property, column) =>
                    {
                        //除主键外其他列都可空
                        if (!column.IsPrimarykey)
                        {
                            column.IsNullable = true;
                        }
                        if (column.DataType == StaticConfig.CodeFirst_BigString)
                        {
                            if (UnitParasHelper.Unit.DataBase.DbType == Yw.Unit.DbType.PostgreSql)
                            {
                                column.DataType = "character varying";
                            }
                        }
                    }
                };

                var typeList = new List<Type>()
                {
                    typeof(Entity.SysUnitLang),
                    typeof(Entity.SysUnitType),
                    typeof(Entity.SysUnitValue),
                    typeof(Entity.SysUnitName),
                    typeof(Entity.SysUnitTransfer)
                };

                using (var db = new SqlSugarClient(connectConfig))
                {
                    //设置字符串默认长度
                    //db.CodeFirst.SetStringDefaultLength(250);
                    //db.CodeFirst.SetStringDefaultLength(int.MaxValue);
                    //建库：如果不存在创建数据库存在不会重复创建 createdb;注意 ：Oracle和个别国产库需不支持该方法，需要手动建库
                    db.DbMaintenance.CreateDatabase();
                    db.CodeFirst.InitTables
                        (
                           typeList.ToArray()
                        );
                }

                return true;
            }
            catch (Exception ex)
            {
                msg = ex.Message;
                return false;
            }
        }
    }
}