using DaJiaoYan.Variables;
using System;
using System.IO;
using System.Threading.Tasks;

namespace DaJiaoYan.Utils
{
    internal class Log
    {
        private readonly static object _lock = new object();

        /// <summary>
        /// 当前全部日志
        /// </summary>
        private static string LogAll = "";
        /// <summary>
        /// 临时日志
        /// </summary>
        private static string LogTmp = "";


        /// <summary>
        /// 日志处理的委托
        /// </summary>
        /// <param name="s"></param>
        public delegate void SetLog(string s);
        /// <summary>
        /// 具体委托的实例
        /// </summary>
        //public static SetLog DoSetLog;

        public static string Now()
        {
            return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
        }

        private static string Today()
        {
            return DateTime.Now.ToString("yyyy-MM-dd");
        }

        /// <summary>
        /// 记录错误
        /// </summary>
        /// <param name="exception"></param>
        public static void Error(Exception exception)
        {
            WriteLine(exception.StackTrace, "error", force: true);
        }

        /// <summary>
        /// 记录信息
        /// </summary>
        /// <param name="s"></param>
        /// <param name="t"></param>
        /// <param name="filename"></param>
        public static void WriteLine(string s, string t = "log", string filename = null, bool force = false)
        {
            if (s != null)
            {
                string info = $"{Now()} [{t}] {s}\r\n";
                Console.Write(info);
                lock (_lock)
                {
                    LogAll = string.Concat(LogAll, info);
                    LogTmp = string.Concat(LogTmp, info);
                }
                //#if DEBUG
                //                DoSetLog?.Invoke(Variables.Variables.LogTmp);
                //#endif
                Save(force);
            }
        }

        /// <summary>
        /// 保存信息
        /// </summary>
        /// <param name="force"></param>
        public static void Save(bool force = false, string filename = null)
        {
            if (force || LogTmp.Length > 30000)
            {
                if (string.IsNullOrEmpty(filename))
                {
                    filename = Today();
                }
                string txt;
                lock (_lock)
                {
                    txt = LogTmp;
                    LogTmp = "";
                }
                Task.Run(() =>
                {
                    FileExts.AppendAllText(Path.Combine(Const.LOG_DIR, $"{filename}.txt"), txt);
                });
            }
        }
    }
}