using System;
using System.Collections.Generic;
using UnityEngine;

namespace Logging
{
    public static class LogCapturer
    {
        // 日志条目结构
        public struct LogEntry
        {
            public DateTime Timestamp;
            public LogType Type;
            public string Message;
            public string StackTrace;

            public override string ToString() =>
                $"[{Timestamp:HH:mm:ss}] [{Type}] {Message}" + 
                (Type == LogType.Exception ? $"\n{StackTrace}" : "");
        }

        private static readonly Queue<LogEntry> _logs = new Queue<LogEntry>();
        private static readonly object _lock = new object(); // 线程锁
        private static int _maxLogs = 1000; // 默认容量

        // 最大日志容量属性
        public static int MaxLogs
        {
            get => _maxLogs;
            set {
                lock (_lock) {
                    _maxLogs = Mathf.Max(value, 1); // 最小值为1
                    TrimExcess();
                }
            }
        }

        static LogCapturer()
        {
            // 注册全局日志回调
            Application.logMessageReceivedThreaded += HandleLog;
        }

        // 日志处理回调
        private static void HandleLog(string message, string stackTrace, LogType type)
        {
            lock (_lock)
            {
                var entry = new LogEntry
                {
                    Timestamp = DateTime.Now,
                    Type = type,
                    Message = message,
                    StackTrace = stackTrace
                };

                _logs.Enqueue(entry);
                TrimExcess();
            }
        }

        // 日志队列修剪
        private static void TrimExcess()
        {
            while (_logs.Count > _maxLogs)
            {
                _logs.Dequeue();
            }
        }

        // 获取当前所有日志（倒序：最新在前）
        public static List<LogEntry> GetLogs(bool reverseOrder = true)
        {
            lock (_lock)
            {
                var list = new List<LogEntry>(_logs);
                if (reverseOrder) list.Reverse();
                return list;
            }
        }

        // 清空日志
        public static void Clear()
        {
            lock (_lock)
            {
                _logs.Clear();
            }
        }
    }
}