using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
using Sirenix.OdinInspector;
using UnityEngine.UI;
using KairoEngine.Core;
using KairoEngine.UI.Tooltips;
using KairoEngine.UI.InteractionHandler;

namespace KairoEngine.UI
{
    /// <summary>
    /// Create and control a menu o buttons. Buttons can be pre-generated or can be created in runtime. When a button is clicked, 
    /// the MenuUI component will execute a function with the IClickHandler interface.
    /// </summary>
    [HideMonoScript]
    public class MenuUI : MonoBehaviour, IClickHandler, IUiSystemElement
    {
        [BoxGroup("Settings")] public string elementTitle = "New UI Element";
        [BoxGroup("Settings")] public bool procedural = false;
        [BoxGroup("Settings"), HideIf("@procedural")] public bool createMenuOnStart = true;
        [BoxGroup("Settings")] public bool visibleOnStart = true;
        [BoxGroup("Settings")] public bool debug = false;
        [BoxGroup("Settings")] public GameObject buttonPrefab;
        [BoxGroup("Settings")] public RectTransform menuParent;
        [BoxGroup("Settings")] public Canvas menuCanvas;
        [BoxGroup("Settings")] public UiAnimator uiAnimator;

        [PropertySpace(4,4), OnCollectionChanged("UpdateButtonData"), ShowIf("@!procedural || debug")] 
        public List<MenuButtomData> buttons = new List<MenuButtomData>();

        private bool isVisible = false;
        [HideInInspector] public IClickHandler handler;
        [HideInInspector] public bool useSubMenus = false;

        public virtual void Start()
        {
            if(handler == null)
            {
                var handlers = gameObject.GetComponents<IClickHandler>();
                if(handlers.Length > 0) handler = handlers[handlers.Length - 1];
            }
            if(handler != null) 
            {
                if(debug) Debug.Log("Menu handler set to " + handler, this.gameObject);
            } 
            else Debug.LogError("Could not find IClickHandler for Menu", this.gameObject);
            if(createMenuOnStart) 
            {
                DestroyMenu();
                CreateMenu();
            }
            if(menuCanvas != null)
            {
                if(visibleOnStart) UiManager.ShowElement(this);
                else UiManager.HideElement(this);
            }
        }

        private void OnDisable()
        {
            if(menuCanvas != null) UiManager.UnregisterElement(this);
        }

        private void OnEnable()
        {
            if(menuCanvas != null) UiManager.RegisterElement(elementTitle, this, this.transform, visibleOnStart);
        }

        public virtual void OnClick(string title)
        {
            for (int i = 0; i < buttons.Count; i++)
            {
                if(buttons[i].title == title)
                {
                    if(buttons[i].action != "" && handler != null)
                    {
                        handler.OnClick(buttons[i].action);
                        if(debug) Debug.Log("Clicked on " + title);
                    }
                }
            }
        }

        public void Hide()
        {
            
            if(uiAnimator != null) uiAnimator.Disable();
            else if(menuCanvas != null) menuCanvas.gameObject.SetActive(false);
            isVisible = false;
        }

        public void Show()
        {
            if(uiAnimator != null) uiAnimator.Enable();
            else if(menuCanvas != null) menuCanvas.gameObject.SetActive(true);
            isVisible = true;

        }

        public bool IsVisible() => isVisible;

        public virtual GameObject CreateButton(MenuButtomData data, Transform parent, GameObject prefab = null)
        {
            if(prefab == null) prefab = buttonPrefab;
            var btn = Instantiate(prefab, parent);
            ClickHandler clickHandler = btn.GetComponent<ClickHandler>();
            if(clickHandler != null) 
            {
                clickHandler.receiver = this;
                clickHandler.title = data.title;
            }
            ButtonData buttonData = btn.GetComponent<ButtonData>();
            if(buttonData != null) buttonData.Setup(data.title, data.graphic);
            TooltipTrigger tooltip = btn.GetComponent<TooltipTrigger>();
            if(tooltip != null) 
            {
                if(data.showTooltip)
                {
                    tooltip.header = data.title;
                    tooltip.content = data.description;
                    tooltip.tooltipType = data.tooltipType;
                }
                else tooltip.enabled = false;
            }
            Button buttonComponent = btn.GetComponent<Button>();
            if(buttonComponent != null) buttonComponent.interactable = data.isInteractable;
            return btn;
        }

        [ButtonGroup("Buttons"), Button("Create Menu"), ShowIf("@!procedural || debug")]
        public virtual void CreateMenu()
        {
            for (int i = 0; i < buttons.Count; i++)
            {
                var btn = CreateButton(buttons[i], menuParent);
                buttons[i].button = btn;
            }
        }

        [ButtonGroup("Buttons"), Button("Destroy Menu"), ShowIf("@!procedural || debug")]
        public virtual void DestroyMenu()
        {
            for (int i = 0; i < buttons.Count; i++)
            {
                #if UNITY_EDITOR
                DestroyImmediate(buttons[i].button);
                #else
                Destroy(buttons[i].button);
                #endif
            }
        }

        private void UpdateButtonData()
        {
            for (int i = 0; i < buttons.Count; i++)
            {
                buttons[i].useSubMenus = useSubMenus;
            }
        }

        public GameObject GetButton(string action) 
        {
            for (int i = 0; i < buttons.Count; i++)
            {
                if(buttons[i].action == action) return buttons[i].button;
            }
            return null;
        }
    }
}