using System;
using System.Collections.Generic;
using Prefab;
using TMPro;
using UnityEngine;

namespace UI
{
    public class LogUI : UIBase
    {
        public Transform contentPanel; // 日志内容容器
        public TextPrefab textPrefab; // 文本预制体引用

        // 日志类型颜色映射
        private static readonly Dictionary<LogType, Color> logColors = new Dictionary<LogType, Color>
        {
            { LogType.Log, Color.white },
            { LogType.Warning, Color.yellow },
            { LogType.Error, new Color(1f, 0.4f, 0.4f) },
            { LogType.Exception, new Color(1f, 0.2f, 0.2f) },
            { LogType.Assert, new Color(0.8f, 0.4f, 1f) }
        };

        private List<Transform> _logItems = new List<Transform>(); // 已创建的日志条目
        private int _lastLogCount = 0; // 上次显示的日志数量

        private void Start()
        {
            Logging.LogCapturer.Clear();
        }

        public override void Show()
        {
            base.Show();
            RefreshLogDisplay();
        }

        private void RefreshLogDisplay()
        {
            var logs = Logging.LogCapturer.GetLogs();

            // 如果日志数量减少，清理多余的条目
            if (logs.Count < _lastLogCount)
            {
                for (int i = logs.Count; i < _lastLogCount; i++)
                {
                    Destroy(_logItems[i].gameObject);
                }

                _logItems.RemoveRange(logs.Count, _logItems.Count - logs.Count);
            }

            // 更新现有条目
            for (int i = 0; i < Math.Min(logs.Count, _logItems.Count); i++)
            {
                UpdateLogEntry(_logItems[i], logs[logs.Count - 1 - i]);
            }

            // 添加新的条目
            if (logs.Count > _lastLogCount)
            {
                for (int i = _lastLogCount; i < logs.Count; i++)
                {
                    CreateLogEntry(logs[logs.Count - 1 - i]);
                }
            }

            _lastLogCount = logs.Count;
        }

        private void CreateLogEntry(Logging.LogCapturer.LogEntry entry)
        {
            // 实例化文本预制体
            var logItem = Instantiate(textPrefab, contentPanel);
            _logItems.Add(logItem.transform);

            UpdateLogEntry(logItem.transform, entry);
        }

        private void UpdateLogEntry(Transform logItemTransform, Logging.LogCapturer.LogEntry entry)
        {
            var logItem = logItemTransform.GetComponent<TextPrefab>();

            // 设置文本内容
            logItem.Label = entry.ToString();

            // 设置文本颜色（根据日志类型）
            if (logColors.TryGetValue(entry.Type, out Color color))
            {
                logItem.text.color = color;
            }
            else
            {
                logItem.text.color = Color.white; // 默认颜色
            }

            logItem.text.alignment = TextAlignmentOptions.TopLeft;
        }
    }
}