using FATrace.Com;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FATrace.App
{
    public class FSqlContext
    {
        private static readonly Lazy<IFreeSql> LazyFreeSql = new Lazy<IFreeSql>(() =>
        {
            var connectionString = ConfigHelper.GetRequiredConnectionString("connecting");
            try
            {
                return new FreeSql.FreeSqlBuilder()
                    .UseConnectionString(FreeSql.DataType.SqlServer, connectionString)
                    .UseAutoSyncStructure(false)
                    .Build();
            }
            catch (Exception ex)
            {
                throw new InvalidOperationException("初始化数据库连接失败，请检查连接字符串与数据库网络连通性。", ex);
            }
        });

        /// <summary>
        /// 获取单例数据库实例。
        /// </summary>
        public static IFreeSql FDb => LazyFreeSql.Value;
    }
}