using System;
using System.Text;
using ADOFAIRenderer.Core;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace ADOFAIRenderer.UI
{
    public class DebugMonitorUI : MonoBehaviour
    {
        // --- Progress Bar UI Configuration Constants ---
        private const float BarWidth = 800f;
        private const float BarHeight = 28f;
        private const float BarPosX = 0f;
        private const float BarPosY = -420f; // Y position relative to screen center (Reference: 1920x1080)
        private const int BarTextFontSize = 16; // 눈에 띄게 증가된 텍스트 크기
        private static readonly Color BarBackgroundColor = new(0.08f, 0.08f, 0.1f, 1.0f);
        private static readonly Color BarFillColor = new(0.0f, 0.8f, 1.0f, 1.0f); // Sleek cyan/blue
        private static readonly Color BarTextColor = new(1.0f, 1.0f, 1.0f, 1.0f);

        // --- Progress Bar Outline Configuration Constants ---
        private static readonly Color BarOutlineColor = Color.white; // 대비되는 흰색 윤곽선
        private static readonly Vector2 BarOutlineDistance = new(3.0f, -3.0f); // 3px의 굵고 직관적인 윤곽선 두께

        private TextMeshProUGUI _text = null!;
        private GameObject _progressBarObj = null!;
        private GameObject _progressBarFillObj = null!;
        private RectTransform _fillRect = null!;
        private TextMeshProUGUI _progressText = null!;

        private static TMP_FontAsset GetNanumSquareNeoBdFontAsset()
        {
            TMP_FontAsset? font = null;
            if (RenderMod.FontBundle != null)
            {
                try
                {
                    font = RenderMod.FontBundle.LoadAsset<TMP_FontAsset>("NanumSquareNeoOTF-Bd SDF");
                }
                catch
                {
                    // 로딩 실패
                }
            }

            // 폴백 처리: 에셋 번들에서 실패 시 게임 자체 NanumSquareNeo 또는 내장 TMP SDF 폰트 사용
            if (font == null)
            {
                font = RDString.fontData.fontTMP;
            }
            if (font == null)
            {
                // ReSharper disable once Unity.UnknownResource
                font = Resources.Load<TMP_FontAsset>("Fonts & Materials/LiberationSans SDF");
            }

            if (font != null) return font;
            var fonts = Resources.FindObjectsOfTypeAll<TMP_FontAsset>();
            if (fonts.Length > 0) font = fonts[0];

            return font!;
        }

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

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

            // 해상도 다이내믹 스케일링 설정 (Reference: 1920x1080)
            var 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
            var panelObj = new GameObject("BackgroundPanel");
            panelObj.transform.SetParent(transform, false);
            panelObj.layer = 5;
            
            var image = panelObj.AddComponent<Image>();
            image.color = new Color(0.08f, 0.08f, 0.1f, 0.88f); // 약간 더 고급스러운 다크톤 아크릴 감성

            var 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
            var textObj = new GameObject("MonitorText");
            textObj.transform.SetParent(panelObj.transform, false);
            textObj.layer = 5;
            
            _text = textObj.AddComponent<TextMeshProUGUI>();
            _text.richText = true;
            _text.fontSize = 16; // 13에서 16으로 증가
            _text.alignment = TextAlignmentOptions.TopLeft;

            // TMPro 텍스트 잘림 현상 예방
            _text.textWrappingMode = TextWrappingModes.Normal;
            _text.overflowMode = TextOverflowModes.Overflow;

            // NanumSquareNeo-Bd SDF 폰트 로드 및 적용
            var font = GetNanumSquareNeoBdFontAsset();
            _text.font = font;

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

            // --- Progress Bar UI Setup ---
            // 1. Progress Bar Container
            _progressBarObj = new GameObject("ProgressBar");
            _progressBarObj.transform.SetParent(transform, false);
            _progressBarObj.layer = 5;

            var bgImage = _progressBarObj.AddComponent<Image>();
            bgImage.color = BarBackgroundColor;

            // 프로그레스 바 흰색 윤곽선 컴포넌트 추가
            var bgOutline = _progressBarObj.AddComponent<Outline>();
            bgOutline.effectColor = BarOutlineColor;
            bgOutline.effectDistance = BarOutlineDistance;

            var barRect = _progressBarObj.GetComponent<RectTransform>();
            barRect.anchorMin = new Vector2(0.5f, 0.5f);
            barRect.anchorMax = new Vector2(0.5f, 0.5f);
            barRect.pivot = new Vector2(0.5f, 0.5f);
            barRect.anchoredPosition = new Vector2(BarPosX, BarPosY);
            barRect.sizeDelta = new Vector2(BarWidth, BarHeight);

            // 2. Progress Bar Fill
            _progressBarFillObj = new GameObject("ProgressBarFill");
            _progressBarFillObj.transform.SetParent(_progressBarObj.transform, false);
            _progressBarFillObj.layer = 5;

            var fillImage = _progressBarFillObj.AddComponent<Image>();
            fillImage.color = BarFillColor;

            _fillRect = _progressBarFillObj.GetComponent<RectTransform>();
            _fillRect.anchorMin = new Vector2(0, 0);
            _fillRect.anchorMax = new Vector2(0, 1);
            _fillRect.pivot = new Vector2(0, 0.5f);
            _fillRect.anchoredPosition = Vector2.zero;
            _fillRect.sizeDelta = new Vector2(0, 0); // width will be updated dynamically in Update()

            // 3. Progress Bar Text
            var progressTextObj = new GameObject("ProgressBarText");
            progressTextObj.transform.SetParent(_progressBarObj.transform, false);
            progressTextObj.layer = 5;

            _progressText = progressTextObj.AddComponent<TextMeshProUGUI>();
            _progressText.richText = true;
            _progressText.fontSize = BarTextFontSize; // 14에서 18로 증가
            _progressText.alignment = TextAlignmentOptions.Center;
            _progressText.font = font;
            _progressText.color = BarTextColor;

            // 프로그레스 바 내부 텍스트 아웃라인 추가 (진행율 가독성 확보)
            var textOutline = progressTextObj.AddComponent<Outline>();
            textOutline.effectColor = new Color(0f, 0f, 0f, 0.9f);
            textOutline.effectDistance = new Vector2(1.5f, -1.5f);

            var textRectBar = progressTextObj.GetComponent<RectTransform>();
            textRectBar.anchorMin = Vector2.zero;
            textRectBar.anchorMax = Vector2.one;
            textRectBar.offsetMin = Vector2.zero;
            textRectBar.offsetMax = Vector2.zero;
        }

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

            var sb = new StringBuilder();
            sb.AppendLine("<b><color=#00ccff>ADOFAI Renderer Realtime Monitor</color></b>");
            sb.AppendLine();
            sb.AppendLine($"• Rendered Progress: <b>{(RenderManager.Instance ? RenderManager.Instance.frameCount : 0)}</b> frames");

            var queueCount = 0;
            if (RenderManager.Instance)
            {
                lock (RenderManager.Instance.ImageQueue)
                {
                    queueCount = RenderManager.Instance.ImageQueue.Count;
                }
            }
            sb.AppendLine($"• Queued Buffers: <b>{queueCount}</b> / {RenderManager.MaxQueuedFrames} frames");

            sb.AppendLine(RenderManager.Instance && RenderManager.Instance.isThrottling
                ? "• Status: <b><color=yellow>THROTTLING (Safe Mode)</color></b>"
                : "• Status: <b><color=green>NORMAL (Encoding)</color></b>");
            sb.AppendLine();
            sb.AppendLine($"• Throttling Controls: {(RenderManager.Instance ? RenderManager.Instance.throttleCount : 0)} times");
            sb.AppendLine($"• Readback Hard Failures: <color=#ff3333>{(RenderManager.Instance ? RenderManager.Instance.readbackFailureCount : 0)}</color> times");
            sb.AppendLine($"• Render Skip-Retry: {(RenderManager.Instance ? RenderManager.Instance.skipCount : 0)} / {RenderManager.MaxRenderRetry}");

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

            _text.text = sb.ToString();

            // Update Progress Bar
            var progress = 0f;
            var currentFloor = 0;
            var totalFloors = 0;

            if (scrController.instance && ADOBase.lm && ADOBase.lm.listFloors != null)
            {
                currentFloor = scrController.instance.currFloor ? scrController.instance.currFloor.seqID : 0;
                totalFloors = ADOBase.lm.listFloors.Count - 1;
                if (totalFloors > 0)
                {
                    progress = Mathf.Clamp01((float)currentFloor / totalFloors);
                }
            }

            if (_fillRect) _fillRect.sizeDelta = new Vector2(BarWidth * progress, 0);
            if (_progressText) _progressText.text = $"{progress * 100f:F1}% ({currentFloor}/{totalFloors})";
        }
    }
}