using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Sirenix.OdinInspector;

namespace KairoEngine.UI
{
    [HideMonoScript]
    public class UiManager : MonoBehaviour
    {
        public static UiManager instance;
        public bool showUiElements = true;

        [ListDrawerSettings(HideAddButton = true, HideRemoveButton = true, DraggableItems = false, Expanded = true, ShowPaging = false, ShowItemCount = true)]
        public List<ElementState> uiElements = new List<ElementState>();

        

        void Awake()
        {
            if(instance == null) instance = this;
            else Destroy(this);
        }

        void Update()
        {
            for (int i = 0; i < uiElements.Count; i++)
            {
                uiElements[i].gameState = uiElements[i].element.IsVisible();
                if(showUiElements == false)
                {
                    if(uiElements[i].gameState == true) uiElements[i].element.Hide();
                }
                else
                {
                    if(uiElements[i].desiredState == true && !uiElements[i].element.IsVisible()) uiElements[i].element.Show();
                    else if(uiElements[i].desiredState == false && uiElements[i].element.IsVisible()) uiElements[i].element.Hide();
                }
            }
        }

        public static void RegisterElement(string title, IUiSystemElement element, Transform controllerTransform, bool currentState = false)
        {
            if(instance == null) return;
            var elementState = new ElementState(currentState, element.IsVisible(), title, element, controllerTransform);
            bool duplicate = false;
            for (int i = 0; i < instance.uiElements.Count; i++)
            {
                if(instance.uiElements[i].title == title)
                {
                    duplicate = true;
                    break;
                }
            }
            if(!duplicate) instance.uiElements.Add(elementState);
            if(instance.showUiElements && currentState) element.Show();
            else element.Hide();
        }

        public static void UnregisterElement(IUiSystemElement element)
        {
            if(instance == null) return;
            for (int i = 0; i < instance.uiElements.Count; i++)
            {
                if(instance.uiElements[i].element == element) 
                {
                    instance.uiElements[i].element.Hide();
                    instance.uiElements.Remove(instance.uiElements[i]);
                    return;
                }
            }
        }

        public static void ShowElement(IUiSystemElement element)
        {
            if(instance == null) return;
            for (int i = 0; i < instance.uiElements.Count; i++)
            {
                if(instance.uiElements[i].element == element) 
                {
                    instance.uiElements[i].element.Show();
                    instance.uiElements[i].desiredState = true;
                    return;
                }
            }
        }

        public static void ShowElement(string title)
        {
            if(instance == null) return;
            for (int i = 0; i < instance.uiElements.Count; i++)
            {
                if(instance.uiElements[i].title == title) 
                {
                    instance.uiElements[i].element.Show();
                    instance.uiElements[i].desiredState = true;
                }
            }
        }

        public static void HideElement(IUiSystemElement element)
        {
            if(instance == null) return;
            for (int i = 0; i < instance.uiElements.Count; i++)
            {
                if(instance.uiElements[i].element == element) 
                {
                    instance.uiElements[i].element.Hide();
                    instance.uiElements[i].desiredState = false;
                    return;
                }
            }
        }

        public static void HideElement(string title)
        {
            for (int i = 0; i < instance.uiElements.Count; i++)
            {
                if(instance.uiElements[i].title == title) 
                {
                    instance.uiElements[i].element.Hide();
                    instance.uiElements[i].desiredState = false;
                }
            }
        }

        [System.Serializable]
        public class ElementState
        {
            [HideLabel, HorizontalGroup("h", 0.04f), Tooltip("Desired state")] public bool desiredState;
            [ReadOnly, HideLabel, HorizontalGroup("h", 0.04f), Tooltip("Current state")] public bool gameState;
            [ReadOnly, HideLabel, HorizontalGroup("h", 0.52f)] public string title = "";
            
            [HideInInspector] public IUiSystemElement element;
            [ReadOnly, HideLabel, HorizontalGroup("h", 0.4f)] public Transform controllerTransform;

            public ElementState(bool desiredState, bool gameState, string title, IUiSystemElement element, Transform controllerTransform) 
            {
                this.desiredState = desiredState;
                this.gameState = gameState;
                this.title = title;
                this.element = element;
                this.controllerTransform = controllerTransform;
            }
        }

    }
}