using Studio.UVC.UI;
using System;
using System.Linq;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Studio.UI.Modal
{
    public class UIModalEventArgs : EventArgs
    {
        public readonly object Data;

        public UIModalEventArgs(object data)
        {
            Data = data;
        }
    }

    [RequireComponent(typeof(CanvasGroup))]
    public class UIModal : UnityEngine.MonoBehaviour
    {
        public static readonly string PrefabPath = "Prefabs/Modal/UIModal";

        protected string title = "";
        protected UIModalContentHolder contentHolder;
        protected IUIModalContent content;

        protected UVCButton UIButtonOk;
        protected UVCButton UIButtonCancel;
        protected UVCButton UIButtonClose;
        protected TextMeshProUGUI titleText;
        protected CanvasGroup canvasGroup;

        protected bool animatting = false;

        protected float target = 0;
        protected float duration = 0.25f;
        protected float alpha = 1;

        protected bool useKeyboard = false;

        public EventHandler<UIModalEventArgs> OnOk { get; set; }
        public EventHandler<UIModalEventArgs> OnClose { get; set; }


        public virtual void Init(string title, string contentPrefabPath, object contentData, string okButtonText = "저장하기", string cancelButtonText="취소")
        {
            this.title = title;

            canvasGroup = GetComponent<CanvasGroup>();

            var btns = GetComponentsInChildren<UVCButton>();
            UIButtonOk = btns.FirstOrDefault<UVCButton>(x => x.name.Equals(nameof(UIButtonOk),StringComparison.OrdinalIgnoreCase));
            UIButtonClose = btns.FirstOrDefault<UVCButton>(x => x.name.Equals(nameof(UIButtonClose), StringComparison.OrdinalIgnoreCase));
            UIButtonCancel = btns.FirstOrDefault<UVCButton>(x => x.name.Equals(nameof(UIButtonCancel), StringComparison.OrdinalIgnoreCase));

            var txts = GetComponentsInChildren<TextMeshProUGUI>();
            contentHolder = GetComponentInChildren<UIModalContentHolder>();
            content = CreateConent(contentPrefabPath, contentHolder.transform);
            content.SetInfo(contentData);

            RectTransform rt = transform.Find("Modal").GetComponent<RectTransform>();
            rt.sizeDelta = content.GetSize() + new Vector2(0, 48 + 96);//48은 타이틀 높이, 96은 버튼 높이

            if (UIButtonOk != null)
            {
                UIButtonOk.Init();
                UIButtonOk.SetText(okButtonText);
                UIButtonOk.onClickButton.AddListener(() =>
                {
                    if (content != null)
                    {
                        if (content.Ok())
                        {
                            OnOk?.Invoke(this, new UIModalEventArgs(content.GetOkResult()));
                            Close();
                        }
                    }
                });
            }

            if (UIButtonCancel != null)
            {
                UIButtonCancel.SetText(cancelButtonText);
                UIButtonCancel.onClickButton.AddListener(() =>
                {
                    if (content != null && content.Close())
                    {
                        OnClose?.Invoke(this, new UIModalEventArgs(content.GetCloseResult()));
                        Close();
                    }
                });
            }


            if (UIButtonClose != null)
            {
                UIButtonClose.onClickButton.AddListener(() =>
                {
                    if (content != null && content.Close())
                    {
                        OnClose?.Invoke(this, new UIModalEventArgs(content.GetCloseResult()));
                        Close();
                    }
                });
            }

            if (txts != null)
            {
                titleText = txts.FirstOrDefault(x=>x.name.Equals(nameof(titleText),StringComparison.OrdinalIgnoreCase));
                titleText.text = this.title;
            }

            canvasGroup.alpha = 0;
            canvasGroup.interactable = false;
            canvasGroup.blocksRaycasts = false;
        }

        protected virtual IUIModalContent CreateConent(string contentPrefabPath, Transform parent)
        {
            GameObject prefab = Resources.Load(contentPrefabPath, typeof(GameObject)) as GameObject;
            GameObject go = UnityEngine.Object.Instantiate(prefab);
            IUIModalContent content = go.GetComponent<IUIModalContent>();
            go.transform.SetParent(parent, false);
            return content;
        }
        
        public void Open()
        {
            canvasGroup.interactable = true;
            canvasGroup.blocksRaycasts = true;
            target = 1;
            alpha = canvasGroup.alpha;
            animatting = true;
        }

        public void Close()
        {
            target = 0;
            alpha = canvasGroup.alpha;
            animatting = true;
        }


        void Update()
        {
            if (animatting)
            {
                if (duration < 0)
                {
                    duration = 0.001f;
                }

                alpha = Mathf.MoveTowards(alpha, target, (1 / duration) * Time.deltaTime);
                canvasGroup.alpha = alpha;
                if (alpha == target)
                {
                    if (target == 0)
                    {
                        Destroy(gameObject);
                    }
                    animatting = false;
                }
            }
            else
            {
                if (alpha == 1 && target == 1 && useKeyboard)
                {
                    if (Input.GetKeyDown(KeyCode.Escape))
                    {

                        UIButtonClose.UVCClickButton.OnPointerDown(new UnityEngine.EventSystems.PointerEventData(EventSystem.current));

                    }
                    else if (Input.GetKeyUp(KeyCode.Escape))
                    {
                        if (content != null && content.Close())
                        {

                            UIButtonClose.UVCClickButton.OnPointerUp(new UnityEngine.EventSystems.PointerEventData(EventSystem.current));

                            OnClose?.Invoke(this, new UIModalEventArgs(content.GetCloseResult()));
                            Close();
                        }
                    }
                    else if (Input.GetKeyDown(KeyCode.Space))
                    {
                        UIButtonOk.UVCClickButton.OnPointerDown(new UnityEngine.EventSystems.PointerEventData(EventSystem.current));
                    }
                    else if (Input.GetKeyUp(KeyCode.Space))
                    {
                        UIButtonOk.UVCClickButton.OnPointerUp(new UnityEngine.EventSystems.PointerEventData(EventSystem.current));
                        if (content != null && content.Ok())
                        {
                            OnOk?.Invoke(this, new UIModalEventArgs(content.GetOkResult()));
                            Close();
                        }
                    }
                }
            }
        }

        protected virtual void OnDestroy()
        {
            if (UIButtonOk != null)
            {
                UIButtonOk.onClickButton.RemoveAllListeners();
            }

            if (UIButtonCancel != null)
            {
                UIButtonCancel.onClickButton.RemoveAllListeners();
            }

            if (UIButtonClose != null)
            {
                UIButtonClose.onClickButton.RemoveAllListeners();
            }

            OnOk = null;
            OnClose = null;
        }
    }
}