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

namespace Streamingle.Contents.BossRaid
{
    /// <summary>
    /// 승리 결과 화면 UI.
    /// "YOU WIN!" + 전투 스탯 요약.
    /// </summary>
    public class VictoryScreen : MonoBehaviour
    {
        #region Fields

        [Header("설정")]
        [SerializeField] private float titleAppearDelay = 0.3f;
        [SerializeField] private float statsAppearDelay = 0.8f;
        [SerializeField] private float statLineInterval = 0.2f;

        [Header("비주얼")]
        [SerializeField] private Color titleColor = new Color(1f, 0.85f, 0.2f);
        [SerializeField] private Color statLabelColor = new Color(0.7f, 0.7f, 0.7f);
        [SerializeField] private Color statValueColor = new Color(0.3f, 1f, 0.5f);

        private Canvas _canvas;
        private CanvasGroup _canvasGroup;
        private Text _titleText;
        private Text _statsText;
        private Coroutine _showCoroutine;
        private Font _font;

        #endregion

        #region Unity Messages

        private void Awake()
        {
            _font = BossRaidFontLoader.Load();
            CreateUI();
            _canvasGroup.alpha = 0f;
        }

        #endregion

        #region Public Methods

        public void Show(BossRaidResult result)
        {
            if (_showCoroutine != null)
                StopCoroutine(_showCoroutine);
            _showCoroutine = StartCoroutine(ShowCoroutine(result));
        }

        public void Hide()
        {
            if (_showCoroutine != null)
            {
                StopCoroutine(_showCoroutine);
                _showCoroutine = null;
            }
            _canvasGroup.alpha = 0f;
        }

        #endregion

        #region Private Methods

        private IEnumerator ShowCoroutine(BossRaidResult result)
        {
            _canvasGroup.alpha = 1f;
            _titleText.text = "";
            _statsText.text = "";

            yield return new WaitForSecondsRealtime(titleAppearDelay);

            _titleText.text = "YOU WIN!";
            yield return StartCoroutine(PunchScale(_titleText.rectTransform, 0.4f, 1.5f));

            yield return new WaitForSecondsRealtime(statsAppearDelay);

            string[] lines = new string[]
            {
                $"Boss:  {result.bossName}",
                $"Time:  {FormatTime(result.elapsedTime)}",
                $"Total Damage:  {result.totalDamage:N0}",
                $"Hits:  {result.hitCount}",
                $"Criticals:  {result.criticalCount}",
                $"Max Combo:  {result.maxCombo}",
            };

            _statsText.text = "";
            foreach (var line in lines)
            {
                _statsText.text += line + "\n";
                yield return new WaitForSecondsRealtime(statLineInterval);
            }
        }

        private IEnumerator PunchScale(RectTransform rect, float duration, float punchSize)
        {
            Vector3 baseScale = Vector3.one;
            Vector3 punchScale = baseScale * punchSize;

            float elapsed = 0f;
            while (elapsed < duration)
            {
                elapsed += Time.unscaledDeltaTime;
                float t = elapsed / duration;
                float ease = 1f - Mathf.Pow(2f, -10f * t) * Mathf.Cos(t * Mathf.PI * 3f);
                rect.localScale = Vector3.LerpUnclamped(punchScale, baseScale, ease);
                yield return null;
            }
            rect.localScale = baseScale;
        }

        private string FormatTime(float seconds)
        {
            int min = Mathf.FloorToInt(seconds / 60f);
            float sec = seconds % 60f;
            return min > 0 ? $"{min}m {sec:F1}s" : $"{sec:F1}s";
        }

        private void CreateUI()
        {
            var canvasObj = new GameObject("BossRaid_VictoryScreen");
            canvasObj.transform.SetParent(transform);
            _canvas = canvasObj.AddComponent<Canvas>();
            _canvas.renderMode = RenderMode.ScreenSpaceOverlay;
            _canvas.sortingOrder = 200;
            _canvasGroup = canvasObj.AddComponent<CanvasGroup>();
            _canvasGroup.interactable = false;
            _canvasGroup.blocksRaycasts = false;
            var scaler = canvasObj.AddComponent<CanvasScaler>();
            scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
            scaler.referenceResolution = new Vector2(1920, 1080);

            // 배경
            var bgObj = new GameObject("Victory_BG");
            bgObj.transform.SetParent(canvasObj.transform, false);
            var bgRect = bgObj.AddComponent<RectTransform>();
            bgRect.anchorMin = Vector2.zero;
            bgRect.anchorMax = Vector2.one;
            bgRect.offsetMin = Vector2.zero;
            bgRect.offsetMax = Vector2.zero;
            var bgImg = bgObj.AddComponent<Image>();
            bgImg.color = new Color(0f, 0f, 0f, 0.5f);
            bgImg.raycastTarget = false;

            // 타이틀
            var titleObj = new GameObject("Victory_Title");
            titleObj.transform.SetParent(canvasObj.transform, false);
            var titleRect = titleObj.AddComponent<RectTransform>();
            titleRect.anchorMin = new Vector2(0.1f, 0.55f);
            titleRect.anchorMax = new Vector2(0.9f, 0.85f);
            titleRect.offsetMin = Vector2.zero;
            titleRect.offsetMax = Vector2.zero;
            _titleText = titleObj.AddComponent<Text>();
            _titleText.fontSize = 80;
            _titleText.color = titleColor;
            _titleText.alignment = TextAnchor.MiddleCenter;
            _titleText.fontStyle = FontStyle.Bold;
            _titleText.raycastTarget = false;
            if (_font != null) _titleText.font = _font;
            var titleOutline = titleObj.AddComponent<Outline>();
            titleOutline.effectColor = Color.black;
            titleOutline.effectDistance = new Vector2(3f, -3f);

            // 스탯
            var statsObj = new GameObject("Victory_Stats");
            statsObj.transform.SetParent(canvasObj.transform, false);
            var statsRect = statsObj.AddComponent<RectTransform>();
            statsRect.anchorMin = new Vector2(0.25f, 0.1f);
            statsRect.anchorMax = new Vector2(0.75f, 0.55f);
            statsRect.offsetMin = Vector2.zero;
            statsRect.offsetMax = Vector2.zero;
            _statsText = statsObj.AddComponent<Text>();
            _statsText.fontSize = 28;
            _statsText.color = statValueColor;
            _statsText.alignment = TextAnchor.UpperCenter;
            _statsText.lineSpacing = 1.5f;
            _statsText.raycastTarget = false;
            if (_font != null) _statsText.font = _font;
            var statsOutline = statsObj.AddComponent<Outline>();
            statsOutline.effectColor = new Color(0f, 0f, 0f, 0.8f);
            statsOutline.effectDistance = new Vector2(1f, -1f);
        }

        #endregion
    }
}