using AibisDream.Kit;
using AibisDream.Utility;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace AibisDream
{
    public class ChapterPanel : MonoBehaviour, IUIPanel
    {
        #region 索引
        
        public ChapterController chapterController;
        public Animator animator;
        public RectTransform chapterContentRect;
        public TMP_Text errorInfo;

        public GameObject chapterDetail;
        public Image chapterDetailImage;
        public TMP_Text chapterDetailText;
        public Button continueButton;
        public Button restartButton;
        
        public GameObject chapterItemPrefab;
        
        #endregion
        
        public Color backgroundColor = new(10.0f / 255.0f, 10.0f / 255.0f, 10.0f / 255.0f, 0.6f);
        public float delayTime = 0.5f;
        private GameObject _background;

        private ChapterVo _curChapterVo;

        public void Show()
        {
            gameObject.SetActive(true);
            
            AddBackground();
            animator.Play("Open", 0, 0);
            ActionKit.Delay(delayTime, DrawContent).Start(this);
        }

        public void Hide()
        {
            RemoveBackground();
            animator.Play("Close", 0, 0);
            ActionKit.Delay(delayTime, DestroyContent).Start(this);
        }
        
        private void AddBackground()
        {
            var bgTex = new Texture2D(1, 1);
            bgTex.SetPixel(0, 0, backgroundColor);
            bgTex.Apply();

            _background = new GameObject("PopupBackground");
            var image = _background.AddComponent<Image>();
            var rect = new Rect(0, 0, bgTex.width, bgTex.height);
            var sprite = Sprite.Create(bgTex, rect, new Vector2(0.5f, 0.5f), 1);
            // Clone the material, which is the default UI material, to avoid changing it permanently.
            image.material = new Material(image.material);
            image.material.mainTexture = bgTex;
            image.sprite = sprite;
            var newColor = image.color;
            image.color = newColor;
            image.canvasRenderer.SetAlpha(0.0f);
            image.CrossFadeAlpha(1.0f, 0.4f, false);

            var canvas = GetComponentInParent<Canvas>();
            _background.transform.localScale = new Vector3(1, 1, 1);
            _background.GetComponent<RectTransform>().sizeDelta = canvas.GetComponent<RectTransform>().sizeDelta;
            _background.transform.SetParent(transform, false);
            _background.transform.SetAsFirstSibling();
        }

        private void RemoveBackground()
        {
            var image = _background.GetComponent<Image>();
            if (image != null)
            {
                image.CrossFadeAlpha(0.0f, 0.2f, false);
            }
        }
        
        #region 绘制关卡信息部分

        private void DrawContent()
        {
            chapterContentRect.DestroyAllChildren();
            chapterDetail.SetActive(false);
            
            continueButton.onClick.AddListener(OnContinueClick);
            restartButton.onClick.AddListener(OnRestartClick);
            
            var chapterList = chapterController.GetChapterList();
            if (chapterList.Count <= 0)
            {
                errorInfo.gameObject.SetActive(true);
            }
            else
            {
                errorInfo.gameObject.SetActive(false);
                foreach (var chapterVo in chapterList)
                {
                    var chapterItem = Instantiate(chapterItemPrefab, chapterContentRect).GetComponent<ChapterItem>();
                    chapterItem.Init(chapterVo);
                    chapterItem.OnClick += OnChapterSelected;
                }
            }
        }

        private void DestroyContent()
        {
            chapterDetail.SetActive(false);
            _curChapterVo = default;
            
            continueButton.onClick.RemoveListener(OnContinueClick);
            restartButton.onClick.RemoveListener(OnRestartClick);
            
            chapterContentRect.DestroyAllChildren();
            gameObject.SetActive(false);
            Destroy(_background);
        }

        private void OnChapterSelected(ChapterVo chapterVo)
        {
            chapterDetail.SetActive(true);
            
            chapterDetailImage.sprite = chapterVo.pic;
            chapterDetailText.text = chapterVo.desc;
            continueButton.gameObject.SetActive(chapterVo.hasSaveFile);
            
            _curChapterVo = chapterVo;
        }

        private void OnContinueClick()
        {
            if (!_curChapterVo.hasSaveFile)
            {
                Debug.LogWarning("存档与关联篇章不匹配，请查找问题");
            }
            
            chapterController.StartWithSaveFile();
            
            Close();
        }

        private void OnRestartClick()
        {
            chapterController.StartWithChapter(_curChapterVo);
            
            Close();
        }

        #endregion

        #region panel属性

        public bool IsOpen => gameObject.activeSelf;
        public bool IsCloseable => true;

        public void Close()
        {
            UIManager.Instance.HidePanel<ChapterPanel>();
        }

        #endregion
    }
}