using System;
using System.Text;
using UnityEngine;
using UnityEngine.UI;

namespace ADOFAIRenderer.Component
{
    public class DebugMonitorUI : MonoBehaviour
    {
        private Text _text = null!;

        private void Start()
        {
            // UI 레이어(5) 설정
            gameObject.layer = 5;

            // Canvas 설정
            Canvas canvas = gameObject.AddComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceOverlay;
            canvas.sortingOrder = 9999;

            // 해상도 다이내믹 스케일링 설정 (Reference: 1920x1080)
            CanvasScaler scaler = gameObject.AddComponent<CanvasScaler>();
            scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
            scaler.referenceResolution = new Vector2(1920, 1080);
            scaler.screenMatchMode = CanvasScaler.ScreenMatchMode.MatchWidthOrHeight;
            scaler.matchWidthOrHeight = 0.5f;

            gameObject.AddComponent<GraphicRaycaster>();

            // 배경 패널 생성
            GameObject panelObj = new GameObject("BackgroundPanel");
            panelObj.transform.SetParent(transform, false);
            panelObj.layer = 5;
            
            Image image = panelObj.AddComponent<Image>();
            image.color = new Color(0.08f, 0.08f, 0.1f, 0.88f); // 약간 더 고급스러운 다크톤 아크릴 감성

            RectTransform panelRect = panelObj.GetComponent<RectTransform>();
            panelRect.anchorMin = new Vector2(1, 1);
            panelRect.anchorMax = new Vector2(1, 1);
            panelRect.pivot = new Vector2(1, 1);
            panelRect.anchoredPosition = new Vector2(-30, -30);
            panelRect.sizeDelta = new Vector2(340, 250);

            // 텍스트 생성
            GameObject textObj = new GameObject("MonitorText");
            textObj.transform.SetParent(panelObj.transform, false);
            textObj.layer = 5;
            
            _text = textObj.AddComponent<Text>();
            _text.supportRichText = true;
            _text.fontSize = 13;
            _text.lineSpacing = 1.3f;
            _text.alignment = TextAnchor.UpperLeft;

            // uGUI 특유의 텍스트 잘림 현상 원천 예방
            _text.horizontalOverflow = HorizontalWrapMode.Wrap;
            _text.verticalOverflow = VerticalWrapMode.Overflow;

            Font? font = Resources.GetBuiltinResource<Font>("LegacyRuntime.ttf");
            if (font == null)
            {
                font = Resources.GetBuiltinResource<Font>("Arial.ttf");
            }
            if (font == null)
            {
                var fonts = Resources.FindObjectsOfTypeAll<Font>();
                if (fonts.Length > 0) font = fonts[0];
            }
            _text.font = font;

            RectTransform textRect = textObj.GetComponent<RectTransform>();
            textRect.anchorMin = Vector2.zero;
            textRect.anchorMax = Vector2.one;
            textRect.offsetMin = new Vector2(20, 20); // 좀 더 넉넉하고 아름다운 패딩 여백
            textRect.offsetMax = new Vector2(-20, -20);
        }

        private void Update()
        {
            if (!_text) return;

            StringBuilder sb = new StringBuilder();
            sb.AppendLine("<b><color=#00ccff>ADOFAI Renderer Realtime Monitor</color></b>");
            sb.AppendLine();
            sb.AppendLine($"• Rendered Progress: <b>{RenderManager.FrameCount}</b> frames");

            int queueCount;
            lock (RenderManager.ImageQueue)
            {
                queueCount = RenderManager.ImageQueue.Count;
            }
            sb.AppendLine($"• Queued Buffers: <b>{queueCount}</b> / 60 frames");

            if (RenderMod.IsThrottling)
            {
                sb.AppendLine("• Status: <b><color=yellow>THROTTLING (Safe Mode)</color></b>");
            }
            else
            {
                sb.AppendLine("• Status: <b><color=green>NORMAL (Encoding)</color></b>");
            }
            sb.AppendLine();
            sb.AppendLine($"• Throttling Controls: {RenderMod.ThrottleCount} times");
            sb.AppendLine($"• Readback Hard Failures: <color=#ff3333>{RenderMod.ReadbackFailureCount}</color> times");
            sb.AppendLine($"• Render Skip-Retry: {RenderMod.SkipCount} / 60");

            double memoryMb = GC.GetTotalMemory(false) / (1024.0 * 1024.0);
            sb.AppendLine($"• Mono Heap Memory: {memoryMb:F2} MB");

            _text.text = sb.ToString();
        }
    }
}