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

namespace KairoEngine.UI.ActivityMessages
{
    //* This is the simplest possible implementation of this controller
    // Todo: Add icons to activity messages
    // Todo: Add autohide prorperty to messages
    // Todo: Cleanup list of activeMessages that have been destroyed

    /// <summary>
    /// Controller for showing activity messages to the player. 
    /// Use the ActivityMessageEvents.Send() to send a message to this controller.
    /// </summary>
    [HideMonoScript]
    public class ActivityMessageController : MonoBehaviour , IUiSystemElement
    {
        [BoxGroup("Settings")] public string elementTitle = "ActivityMessages";
        [BoxGroup("Settings")] public Canvas canvas;
        [BoxGroup("Settings")] public bool startVisible = false;
        [BoxGroup("Settings")] public int defaultGroupIndex = 0;
        [BoxGroup("Settings")] public int defaultPrefabIndex = 0;
        [BoxGroup("Settings")] public bool removeOldMessages = true;

        [PropertySpace(4,4)]
        public List<ActivityMessageGroup> groups = new List<ActivityMessageGroup>();

        [PropertySpace(4,4), Tooltip("The GameObject prefab for the ActivityMessage.")]
        public List<ActivityMessagePrefabData> prefabs;

        [ReadOnly, PropertySpace(4,0)] public List<ActivityMessageUi> activeMessages;

        private bool isVisible = true;

        private void Start()
        {
            if(startVisible) UiManager.ShowElement(this);
            else UiManager.HideElement(this);
        }

        private void OnEnable()
        {
            UiManager.RegisterElement(elementTitle, this, this.transform, isVisible);
            ActivityMessageEvents.OnActivityMessage += NewActivityMessage;
            ActivityMessageEvents.OnTimedActivityMessage += NewTimedActivityMessage;
            ActivityMessageEvents.OnStickyActivityMessage += NewStickyActivityMessage;
            ActivityMessageEvents.OnFullMessage += NewFullMessage;
            ActivityMessageEvents.OnUpdateActivityMessage += UpdateActivityMessage;
            ActivityMessageEvents.OnRemoveActivityMessage += DestroyActivityMessage;
        }

        private void OnDisable()
        {
            UiManager.UnregisterElement(this);
            ActivityMessageEvents.OnActivityMessage -= NewActivityMessage;
            ActivityMessageEvents.OnTimedActivityMessage -= NewTimedActivityMessage;
            ActivityMessageEvents.OnStickyActivityMessage -= NewStickyActivityMessage;
            ActivityMessageEvents.OnFullMessage -= NewFullMessage;
            ActivityMessageEvents.OnUpdateActivityMessage -= UpdateActivityMessage;
            ActivityMessageEvents.OnRemoveActivityMessage -= DestroyActivityMessage;
        }

        public void Hide()
        {
            isVisible = false;
            canvas.gameObject.SetActive(false);
        }

        public void Show()
        {
            isVisible = true;
            canvas.gameObject.SetActive(true);
        }

        public bool IsVisible() => isVisible;

        private void NewActivityMessage(string msg)
        {
            ActivityMessage message = new ActivityMessage(msg);
            CreateMessage(message, defaultGroupIndex, defaultPrefabIndex).Setup(this, message);
        }

        private void NewTimedActivityMessage(string msg, float time)
        {
            ActivityMessage message = new ActivityMessage(msg, "", "", "", null, time, false, true, null, "", "");
            CreateMessage(message, defaultGroupIndex, defaultPrefabIndex).Setup(this, message);
        }

        private void NewStickyActivityMessage(string msg, bool sticky)
        {
            ActivityMessage message = new ActivityMessage(msg, "", "", "", null, 0f, true, true, null, "", "");
            CreateMessage(message, defaultGroupIndex, defaultPrefabIndex).Setup(this, message);
        }

        private void NewFullMessage(string text, string id, string group, string prefab, Sprite icon, float time, bool sticky, bool hideOnClick, 
            Action action, string tooltipHeader, string tooltipBody, string tooltipType)
        {
            ActivityMessage message = new ActivityMessage(text, id, group, prefab, icon, time, sticky, hideOnClick, action, tooltipHeader, tooltipBody, tooltipType);
            int groupIndex = GetGroupIndexByTitle(group);
            int prefabIndex = GetPrefabIndexByTitle(prefab);
            CreateMessage(message, groupIndex, prefabIndex).Setup(this, message);
        }

        private void UpdateActivityMessage(string id, string newText, Sprite newSprite, float time, bool sticky, bool hideOnClick, 
            Action action, string tooltipHeader, string tooltipBody, string tooltipType)
        {
            for (int i = 0; i < activeMessages.Count; i++)
            {
                if(activeMessages[i].message.text == id || activeMessages[i].message.id == id)
                {
                    activeMessages[i].message.text = newText;
                    if(newSprite != null) activeMessages[i].message.icon = newSprite;
                    activeMessages[i].message.time = time;
                    activeMessages[i].message.sticky = sticky;
                    activeMessages[i].message.hideOnClick = hideOnClick;
                    activeMessages[i].message.tooltipHeader = tooltipHeader;
                    activeMessages[i].message.tooltipBody = tooltipBody;
                    activeMessages[i].message.tooltipType = tooltipType;
                    if(action != null) activeMessages[i].message.action = action;
                    activeMessages[i].Setup(this, activeMessages[i].message);
                    return;
                }
            }
        }

        private void DestroyActivityMessage(string text)
        {
            for (int i = 0; i < activeMessages.Count; i++)
            {
                if(activeMessages[i].message.text == text || activeMessages[i].message.id == text)
                {
                    activeMessages[i].Remove();
                }
            }
        }

        public void RemoveActivityMessageFromList(ActivityMessage message)
        {
            for (int i = 0; i < activeMessages.Count; i++)
            {
                if(activeMessages[i].message.text == message.text || activeMessages[i].message.id == message.id)
                {
                    activeMessages.RemoveAt(i);
                }
            }
        }

        private ActivityMessageUi CreateMessage(ActivityMessage message, int groupIndex, int prefabIndex)
        {
            groups[groupIndex].messages.Add(message);
            GameObject obj = Instantiate(prefabs[prefabIndex].prefab, groups[groupIndex].container);
            ActivityMessageUi msgUi = obj.GetComponent<ActivityMessageUi>();
            activeMessages.Add(msgUi);
            if(removeOldMessages) RemoveOldMessages(groupIndex);
            return msgUi;
        }

        public bool GroupExits(string title)
        {
            for (int i = 0; i < groups.Count; i++)
            {
                if(groups[i].title == title) return true;
            }
            return false;
        }

        public int GetGroupIndexByTitle(string title)
        {
            for (int i = 0; i < groups.Count; i++)
            {
                if(groups[i].title == title) return i;
            }
            return defaultGroupIndex;
        }

        public bool PrefabExits(string title)
        {
            for (int i = 0; i < prefabs.Count; i++)
            {
                if(prefabs[i].title == title) return true;
            }
            return false;
        }

        public int GetPrefabIndexByTitle(string title)
        {
            for (int i = 0; i < prefabs.Count; i++)
            {
                if(prefabs[i].title == title) return i;
            }
            return defaultPrefabIndex;
        }

        public void RemoveOldMessages(int groupIndex)
        {
            if(groups[groupIndex].container.childCount > groups[groupIndex].maxVisibleMessages)
            {
                int n = groups[groupIndex].container.childCount - groups[groupIndex].maxVisibleMessages;
                for (int i = 0; i < n; i++)
                {
                    Destroy(groups[groupIndex].container.GetChild(0).gameObject);
                }
            }
            if(groups[groupIndex].messages.Count > groups[groupIndex].maxHistoryMessages)
            {
                int n = groups[groupIndex].messages.Count - groups[groupIndex].maxHistoryMessages;
                groups[groupIndex].messages.RemoveRange(0, n);
            }
        }
    }
}