using System.Collections.Generic;
using BrewMonster;
using BrewMonster.Scripts;
using BrewMonster.Scripts.Extensions;
using BrewMonster.UI;
using CSNetwork.GPDataType;
using TMPro;
using UnityEngine;
using UnityEngine.U2D;
using UnityEngine.UI;

namespace PerfectWorld.UI.MiniMap
{
    public class CDlgMiniMap : AUIDialog
    {
        public struct MARK
        {
            public int nNPC;
            public string strName;
            public A3DVECTOR3 vecPos;
            public int mapID; // 地图ID // map ID (exposed for USER_LAYOUT save)

            public MARK(int nNPC, string strName, A3DVECTOR3 vecPos, int mapID)
            {
                this.nNPC = nNPC;
                this.strName = strName;
                this.vecPos = vecPos;
                this.mapID = mapID;
            }
        }
        

        [SerializeField] private Vector3 _debugHostPlayerPos;
        [SerializeField] private RectTransform _hostPlayerIcon;
        [SerializeField] private byte nRow, nCol; // number of rows and cols in the current map instances.txt
        [SerializeField] private TMP_Text txtHostPos;

        [SerializeField] private Image _imageMiniMapPrefab;
        [SerializeField] private List<Image> _listImageMiniMap = new();
        [SerializeField] private RectTransform _transformMiniMapParent;

        // reference to unity sprite atlas
        [SerializeField] private SpriteAtlas _spriteAtlas;

        private List<MARK> m_vecMark = new();
        private List<MARK> m_vecNPCMark = new();
        private Dictionary<string, Sprite> m_TexMap = new();
        private List<string> _texToDelete = new(); // list of texture to delete from m_TexMap, use in update functions.
        private float m_fZoom = 1.0f;
        private bool m_bShowMark = true;
        private bool m_bShowTargetArrow = true;

        // map state
        private bool isShowMiniMap = true;
        CECHostPlayer m_pHostPlayer;

        Vector3Int _lastIntHostPos = Vector3Int.zero;

        private int m_nMode; // TODO: currently, there is only get logic, not set logic

        private void Awake()
        {
            LoadAllMiniMapTextures();
        }

        void Update()
        {
            UpdateMiniMap();
        }

        /// <summary>
        /// We keep the player icon at the center of the minimap. Then we update the position of the map itself.
        /// TODO: We have to keep track of the NPC icons on the map also.
        /// </summary>
        private void UpdateMiniMap()
        {
            m_pHostPlayer = GetHostPlayer();
            if (m_pHostPlayer == null) return;

            // TODO: This should be the position of the host player, not hardcoded.
            Transform hostTransform = m_pHostPlayer.transform;
            Vector3 vecPosHost = hostTransform.position;
            Vector3Int currentIntHostPos = new Vector3Int(Mathf.RoundToInt(vecPosHost.x) / 10 + 400, Mathf.RoundToInt(vecPosHost.y) / 10, Mathf.RoundToInt(vecPosHost.z)  / 10 + 550);
            if (currentIntHostPos != _lastIntHostPos)
            {
                txtHostPos.text = $"{currentIntHostPos.x}, {currentIntHostPos.z}, ↑{currentIntHostPos.y}";
                _lastIntHostPos = currentIntHostPos;
            }
            Vector2 hostPlayerPos = new Vector2(vecPosHost.x / 2, vecPosHost.z / 2);
            _transformMiniMapParent.anchoredPosition = -hostPlayerPos;
            _hostPlayerIcon.localRotation = Quaternion.Euler(0, 0, -hostTransform.localRotation.eulerAngles.y);
        }

        /// <summary>
        /// Get the Host Player instance. 
        /// </summary>
        /// <returns></returns>
        private CECHostPlayer GetHostPlayer()
        {
            return CECGameRun.Instance.GetHostPlayer();
        }
        
        // change radar mode
        public int GetMode()  { return m_nMode; }

        /// <summary>Returns the list of user-placed marks on the minimap (for layout save/load).</summary>
        public List<MARK> GetMarks() => m_vecMark;

        // keep this so we can load all textures of other map also.
        [ContextMenu("LoadAllMiniMapTextures")]
        public void LoadAllMiniMapTextures()
        {
            // delete all images in parent
            foreach(Transform child in _transformMiniMapParent)
            {
                Destroy(child.gameObject);
            }

            Sprite pSprite = null;
            for(int r = 0; r < nRow + 3; r++)
            {
                for(int c = 0; c < nCol + 3; c++)
                {
                    string strIndex = $"{r:D2}{c:D2}";
                    pSprite = _spriteAtlas.GetSprite(strIndex);
                    var image = Instantiate(_imageMiniMapPrefab, _transformMiniMapParent);
                    image.sprite = pSprite;
                    image.name = strIndex;
                    image.gameObject.SetActive(true);
                }
            }
        }


        // this is for debuging/testing while this feature was in development
        [ContextMenu("MoveHostPlayerIconToPos")]
        public void MoveHostPlayerIconToPos()
        {
            Vector2 hostPlayerPos = new Vector2(_debugHostPlayerPos.x / 2, _debugHostPlayerPos.z / 2);
            _transformMiniMapParent.anchoredPosition = -hostPlayerPos;
            
        }
    }
}