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

namespace ADOFAIRenderer.UI;

internal class EscapeHandlerUI : MonoBehaviour
{
    private GameObject _containerObj = null!;
    private TextMeshProUGUI _textComponent = null!;
    private Stopwatch? _escapeStopwatch;

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

        // Canvas setup
        var canvas = gameObject.AddComponent<Canvas>();
        canvas.renderMode = RenderMode.ScreenSpaceOverlay;
        canvas.sortingOrder = 10000; // Placed above debug monitor

        // Responsive Canvas Scaler setup
        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>();

        // 1. Create container and background panel object
        _containerObj = new GameObject("EscapeContainer");
        _containerObj.transform.SetParent(transform, false);
        _containerObj.layer = 5;

        var bgImage = _containerObj.AddComponent<Image>();
        bgImage.color = new Color(0.05f, 0.05f, 0.07f, 0.85f); // Dark tone acrylic style

        var containerRect = _containerObj.GetComponent<RectTransform>();
        containerRect.anchorMin = new Vector2(0.5f, 0.5f);
        containerRect.anchorMax = new Vector2(0.5f, 0.5f);
        containerRect.pivot = new Vector2(0.5f, 0.5f);
        containerRect.anchoredPosition = Vector2.zero; // Screen center
        containerRect.sizeDelta = new Vector2(460, 160);

        // 2. Create text object
        var textObj = new GameObject("EscapeText");
        textObj.transform.SetParent(_containerObj.transform, false);
        textObj.layer = 5;

        _textComponent = textObj.AddComponent<TextMeshProUGUI>();
        _textComponent.alignment = TextAlignmentOptions.Center;
        _textComponent.fontSize = 60;
        _textComponent.textWrappingMode = TextWrappingModes.NoWrap;
        _textComponent.richText = true;

        // Apply game's default font (RDString.fontData.fontTMP)
        if (RDString.fontData.fontTMP != null)
            _textComponent.font = RDString.fontData.fontTMP;

        var textRect = textObj.GetComponent<RectTransform>();
        textRect.anchorMin = Vector2.zero;
        textRect.anchorMax = Vector2.one;
        textRect.offsetMin = new Vector2(10, 10);
        textRect.offsetMax = new Vector2(-10, -10);

        // Initial state disabled
        _containerObj.SetActive(false);
    }

    private void Update()
    {
        // Destroy self if rendering is no longer active
        if (!RenderManager.IsActive)
        {
            Destroy(gameObject);
            return;
        }

        if (Input.GetKey(KeyCode.Escape))
        {
            if (_escapeStopwatch == null)
            {
                _escapeStopwatch = new Stopwatch();
                _escapeStopwatch.Start();
                _containerObj.SetActive(true);
            }

            var elapsed = (float)_escapeStopwatch.Elapsed.TotalSeconds;
            var remaining = Mathf.Max(0f, 3f - elapsed);

            // Update remaining time text
            _textComponent.text = $"<color=#FF5252>Cancelling in {remaining:F1}s..</color>\n<size=40><color=#DDDDDD>Hold Esc to cancel render</color></size>";

            // Micro pulse animation (container smoothly scales up while holding)
            var scale = 1.0f + elapsed / 3.0f * 0.15f;
            _containerObj.transform.localScale = new Vector3(scale, scale, 1f);

            if (elapsed < 3f) return;
                
            _escapeStopwatch.Stop();
            _escapeStopwatch = null;
            _containerObj.transform.localScale = Vector3.one; // Reset scale
            _containerObj.SetActive(false);

            // Cancel rendering and exit scene
            if (RenderManager.Instance)
                RenderManager.Instance.CancelRender();
        }
        else
        {
            if (_escapeStopwatch == null) return;
            _escapeStopwatch.Stop();
            _escapeStopwatch = null;
            _containerObj.transform.localScale = Vector3.one; // Reset scale
            _containerObj.SetActive(false);
        }
    }

    private void OnDestroy()
    {
        if (_escapeStopwatch == null) return;
        _escapeStopwatch.Stop();
        _escapeStopwatch = null;
    }
}