using System;
using UnityEngine;
using AibisDream.Utility;

namespace AibisDream.Kit
{
    /// <summary>
    /// 真机文件日志：拦截 <see cref="Debug"/> 输出并写入 <see cref="ConstRef.LogFilePath"/>。
    /// Editor 与 Android 不启用。
    /// </summary>
    internal static class LogKit
    {
        /// <summary>
        /// 文件名称格式
        /// 请注意，不要删除时间格式，否则会造成保存不成功
        /// </summary>
        public static string LogFileName => "Log{0:_yyyy_MM_dd}.txt";

        /// <summary>
        /// 日志保存最近几天的内容
        /// </summary>
        public const int SaveDays = 30;

        /// <summary>
        /// 每一行的打印内容
        /// </summary>
        private static string LogContent => Time + ": {0}\n{1}";

        private static FileLogger _fileLogger;
        private static bool _isInitialized;

        private static string Time => DateTime.Now.ToString("[HH:mm:ss.fffd]");

        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
        private static void Initialize()
        {
#if !UNITY_EDITOR && !UNITY_ANDROID
            if (_isInitialized)
                return;

            _fileLogger = new FileLogger(LogFileName, ConstRef.LogFilePath, SaveDays);
            LogMessage($"Ver.{Application.version}", "", LogType.Log);
            Application.logMessageReceivedThreaded += LogMessage;
            Application.quitting += Shutdown;
            _isInitialized = true;
#endif
        }

        private static void LogMessage(string condition, string stackTrace, LogType type)
        {
            _fileLogger?.Write(string.Format(LogContent, condition, stackTrace));
        }

        private static void Shutdown()
        {
            if (!_isInitialized)
                return;

            Application.logMessageReceivedThreaded -= LogMessage;
            Application.quitting -= Shutdown;
            _fileLogger?.OnDestroy();
            _fileLogger = null;
            _isInitialized = false;
        }
    }
}