using UnityEngine;
using TMPro;
using UnityEngine.EventSystems;
using BrewMonster.Scripts.Task.UI;
using System.Collections.Generic;
using BrewMonster.UI;
using System.Text;
using System.Text.RegularExpressions;
namespace BrewMonster
{
    public class StyledTaskTraceText : MonoBehaviour, IPointerMoveHandler,IPointerClickHandler
    {

        public TMP_Text tmp;
        private List<LinkCommand> linkCommands =new List<LinkCommand>();
        int hoveredLink = -1;
      

        private void Start()
        {
            tmp.raycastTarget = true;
            tmp.ForceMeshUpdate();
        }

        public void OnPointerMove(PointerEventData eventData)
        {
            int linkIndex = TMP_TextUtilities.FindIntersectingLink(
                tmp,
                eventData.position,
                eventData.pressEventCamera
            );

            if (linkIndex != hoveredLink)
            {
                hoveredLink = linkIndex;
            }
        }
        public void Set(string text)
        {
            tmp.text = FormatForTextMeshPro(text);
        }
         public static string FormatForTextMeshPro(string text)
        {
            if (string.IsNullOrEmpty(text))
                return string.Empty;

            StringBuilder result = new StringBuilder(text);
            result.Replace("\\r", "\n");
            return ProcessColorCodes(result);
        }

        public static string ProcessColorCodes(StringBuilder text)
        {
            string pattern = @"\^([0-9A-Fa-f]{6})";
            return Regex.Replace(text.ToString(), pattern, match =>
            {
                string hexColor = match.Groups[1].Value;
                return $"<color=#{hexColor}>";
            }, RegexOptions.None);
        }
        
        public void AddToFirstPosition(LinkCommand linkCommand)
        {
            linkCommands.Insert(0, linkCommand);
        }
        public void AddToLastPosition(LinkCommand linkCommand)
        {
            linkCommands.Add(linkCommand);
        }
        public void AddLinkCommand(LinkCommand linkCommand)
        {
            linkCommands.Add(linkCommand);
        }
        public void RemoveLinkCommand(int linkIndex)
        {
            linkCommands.RemoveAt(linkIndex);
        }
        public void RefreshLinkCommands()
        {
            tmp.text = "";
            linkCommands.Clear();
        }
        void SetLinkColor(int linkIndex, Color32 color)
        {
            TMP_LinkInfo linkInfo = tmp.textInfo.linkInfo[linkIndex];

            for (int i = 0; i < linkInfo.linkTextLength; i++)
            {
                int charIndex = linkInfo.linkTextfirstCharacterIndex + i;
                var charInfo = tmp.textInfo.characterInfo[charIndex];

                if (!charInfo.isVisible) continue;

                int meshIndex = charInfo.materialReferenceIndex;
                int vertexIndex = charInfo.vertexIndex;

                var colors = tmp.textInfo.meshInfo[meshIndex].colors32;
                colors[vertexIndex + 0] = color;
                colors[vertexIndex + 1] = color;
                colors[vertexIndex + 2] = color;
                colors[vertexIndex + 3] = color;
            }

            tmp.UpdateVertexData(TMP_VertexDataUpdateFlags.Colors32);
        }

        public void OnPointerClick(PointerEventData eventData)
        {
            TMP_LinkInfo linkInfo = tmp.textInfo.linkInfo[hoveredLink];
            string linkText = linkInfo.GetLinkText();
            string entityID = linkInfo.GetLinkID();
            switch (entityID)
            {
                case "coord":    
                    linkCommands[hoveredLink].Execute(tmp);
                    //Debug.Log($"[StyledTaskTraceText] OnPointerClick: linkCommands[hoveredLink].Execute(tmp) => {linkCommands[hoveredLink].Execute(tmp)}");
                    break;
                case "npc":
                    linkCommands[hoveredLink].Execute(tmp);
                    break;
                case "monster":
                    break;
                default:
                    Debug.Log($"Clicked unknown link: ID={entityID} Text={linkText}");
                break;
            }
            hoveredLink = -1;
        }

    }

}