using UnityEngine;
using System.Collections.Generic;

namespace Utils
{
    public class RuntimeDebugConsole : MonoBehaviour
    {
        private List<string> logs = new List<string>();
        private Vector2 scrollPosition;
        private bool showConsole = false;
        private GUIStyle logStyle;

        void Awake()
        {
            DontDestroyOnLoad(gameObject);
        }

        void OnEnable()
        {
            Application.logMessageReceived += HandleLog;
        }

        void OnDisable()
        {
            Application.logMessageReceived -= HandleLog;
        }

        void HandleLog(string logString, string stackTrace, LogType type)
        {
            string color = "white";
            if (type == LogType.Error || type == LogType.Exception) color = "red";
            else if (type == LogType.Warning) color = "yellow";

            // Only store message, stack trace might be too long for small console
            logs.Add($"<color={color}>[{type}] {logString}</color>");
            
            if (logs.Count > 50) 
            {
                logs.RemoveAt(0);
            }
            
            // Scroll to bottom
            scrollPosition.y = float.MaxValue;
        }

        void Update()
        {
            // Toggle console with Backquote (~) key
            if (Input.GetKeyDown(KeyCode.BackQuote))
            {
                showConsole = !showConsole;
            }
        }

        void OnGUI()
        {
            if (!showConsole) return;

            if (logStyle == null)
            {
                logStyle = new GUIStyle(GUI.skin.label);
                logStyle.richText = true;
                logStyle.wordWrap = true;
            }

            // Draw a semi-transparent background
            GUI.Box(new Rect(0, 0, Screen.width, Screen.height * 0.5f), "Debug Console (Press ` to toggle)");

            GUILayout.BeginArea(new Rect(10, 20, Screen.width - 20, Screen.height * 0.5f - 40));
            
            scrollPosition = GUILayout.BeginScrollView(scrollPosition);
            foreach (var log in logs)
            {
                GUILayout.Label(log, logStyle);
            }
            GUILayout.EndScrollView();

            GUILayout.BeginHorizontal();
            if (GUILayout.Button("Clear", GUILayout.Width(100)))
            {
                logs.Clear();
            }
            if (GUILayout.Button("Close", GUILayout.Width(100)))
            {
                showConsole = false;
            }
            GUILayout.EndHorizontal();
            
            GUILayout.EndArea();
        }
    }
}