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

namespace Northbound
{
    public class DebugLogUI : MonoBehaviour
    {
        [Header("Settings")]
        public int maxLogMessages = 50;
        public float logDisplayDuration = 5f;
        public KeyCode toggleKey = KeyCode.BackQuote;

        [Header("UI References")]
        public GameObject logPanel;
        public Text logText;
        public GameObject scrollContent;
        public ScrollRect scrollRect;
        
        private Queue<string> _logMessages = new Queue<string>();
        private bool _isVisible = true;

        private void Start()
        {
            // 이미 씬에 있는지 확인
            if (logPanel != null)
            {
                logPanel = CreateLogPanel();
                _isVisible = true;
            }
        }

        private void Update()
        {
            if (Input.GetKeyDown(toggleKey))
            {
                ToggleLogPanel();
            }
        }

        private void OnEnable()
        {
            if (logPanel != null)
            {
                Application.logMessageReceived += HandleLog;
            }
        }

        private void OnDisable()
        {
            if (logPanel != null)
            {
                Application.logMessageReceived -= HandleLog;
            }
        }

        private GameObject CreateLogPanel()
        {
            GameObject panel = new GameObject("DebugLogPanel");
            panel.AddComponent<Canvas>();
            Canvas canvas = panel.GetComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceOverlay;
            canvas.sortingOrder = 9999;

            RectTransform canvasRect = canvas.GetComponent<RectTransform>();
            canvasRect.anchorMin = Vector2.zero;
            canvasRect.anchorMax = new Vector2(Screen.width, Screen.height);
            canvasRect.sizeDelta = Vector2.zero;
            canvasRect.localScale = Vector3.one;

            // 배경
            GameObject background = new GameObject("Background");
            background.transform.SetParent(canvas.transform, false);
            Image bgImage = background.AddComponent<Image>();
            bgImage.color = new Color(0, 0, 0, 0.8f);

            RectTransform bgRect = background.AddComponent<RectTransform>();
            bgRect.anchorMin = Vector2.zero;
            bgRect.anchorMax = Vector2.one;
            bgRect.sizeDelta = new Vector2(600, 300);
            bgRect.localPosition = new Vector2(-300, -150);

            // 로그 내용
            GameObject content = new GameObject("Content");
            content.transform.SetParent(background.transform, false);

            RectTransform contentRect = content.AddComponent<RectTransform>();
            contentRect.anchorMin = Vector2.zero;
            contentRect.anchorMax = Vector2.one;
            contentRect.sizeDelta = new Vector2(580, 280);
            contentRect.localPosition = new Vector2(-290, -140);

            // 텍스트
            Text logTextComponent = content.AddComponent<Text>();
            logTextComponent.fontSize = 14;
            logTextComponent.alignment = TextAnchor.UpperLeft;
            logTextComponent.color = Color.white;

            // 스크롤뷰
            GameObject scrollView = new GameObject("ScrollView");
            scrollView.transform.SetParent(content.transform, false);
            scrollRect = scrollView.AddComponent<ScrollRect>();
            scrollRect.content = contentRect;
            scrollRect.viewport = new RectTransform();
            scrollRect.horizontal = false;
            scrollRect.vertical = true;
            scrollRect.scrollSensitivity = 1;

            return panel;
        }

        private void HandleLog(string logString, string stackTrace, LogType type)
        {
            string timestamp = System.DateTime.Now.ToString("HH:mm:ss");
            string logMessage = $"[{timestamp}] {logString}";
            
            _logMessages.Enqueue(logMessage);
            if (_logMessages.Count > maxLogMessages)
            {
                _logMessages.Dequeue();
            }

            UpdateLogText();
        }

        private void UpdateLogText()
        {
            if (logText == null) return;

            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            foreach (string msg in _logMessages)
            {
                sb.AppendLine(msg);
            }

            logText.text = sb.ToString();
        }

        public void ToggleLogPanel()
        {
            if (logPanel != null)
            {
                _isVisible = !_isVisible;
                logPanel.SetActive(_isVisible);
            }
        }

        public void Log(string message)
        {
            if (logPanel != null)
            {
                logPanel.SetActive(true);
                _isVisible = true;
            }

            Debug.Log($"[DebugLogUI] {message}");
            Debug.Log($"[DebugLogUI] 로그 패널 활성됨: {message}");
        }
    }
}