using System;
using UnityEngine;
using UnityEngine.UI;
using Cinemachine;
using AibisDream.Kit;
using AibisDream.Utility;
using System.Linq;
using AibisDream.Framework;

namespace AibisDream
{
    public class BlockPuzzleSystem : Singleton<BlockPuzzleSystem>
    {
        [Header("物体索引")]
        // 物体索引
        [SerializeField] public BlockPuzzleGrid grid;
        [SerializeField] private Transform shapeRoot;
        [SerializeField] public BlockShapeRack shapeRack;
        [SerializeField] private Canvas canvas;
        

        [Header("临时按钮")]
        // 临时按钮
        [SerializeField] private Button submitButton;
        [SerializeField] private Button clearButton;

        [Header("数据")]
        [SerializeField] private BlockPuzzleData puzzleData;
        [SerializeField] private bool initializeOnStart = true;

        private BlockPuzzleValidator validator;

        // 事件
        public event Action<ValidateResult> OnSubmit;
        public event Action<ValidateResult> OnPreview;

        private void Start()
        {
            if (initializeOnStart)
            {
                Initialize();
            }

            CameraKit.Instance?.RegisterCamera(CameraEnum.BlockPuzzle, GetComponentInChildren<ICinemachineCamera>());
            canvas.worldCamera = Camera.main;
            submitButton.onClick.AddListener(SubmitGameResult);
            clearButton.onClick.AddListener(ResetGame);
        }

        public override void OnSingletonDestroy()
        {
            CameraKit.Instance?.UnRegisterCamera(CameraEnum.BlockPuzzle);
            submitButton.onClick.RemoveListener(SubmitGameResult);
            clearButton.onClick.RemoveListener(ResetGame);
        }

        public void Initialize(BlockPuzzleData puzzleData)
        {
            this.puzzleData = puzzleData;
            ClearGame();
            Initialize();
        }

        public void Initialize()
        {
            // 初始化网格
            grid.Initialize(puzzleData.gridWidth, puzzleData.gridHeight, puzzleData.cellSize);
            // 初始化网格上图形
            foreach (var shapeData in puzzleData.gridShapeDataInfos)
            {
                var shape = shapeRack.CreateBlockShape(shapeData.shapeKey);
                shape.Rotate(shapeData.rotationAngle);
                grid.TrySnapToGrid(shape, shapeData.rootCell);
                shape.GetComponent<ShapeDragger>().IsDraggable = shapeData.isDraggable;
            }

            grid.GridVisualizer.UpdateAllCellsVisual();
            grid.OnShapePlaced += PreCheckGameState;

            // 初始化图形货架
            shapeRack.Init(puzzleData.shapeRackDataInfos);

            // 加载验证器
            validator = ResourceKit.LoadAssetSync<BlockPuzzleValidator>(puzzleData.validatorName);

            Debug.Log("网格系统初始化完成");
        }

        private void PreCheckGameState()
        {
            var shapes = grid.GetShapes();
            var validateResult = validator.Validate(shapes);
            OnPreview?.Invoke(validateResult);
        }

        private void SubmitGameResult()
        {
            var shapes = grid.GetShapes();
            var validateResult = validator.Validate(shapes);
            OnSubmit?.Invoke(validateResult);
            if (validateResult.isPass)
            {
                StorageSystem.Instance.SetValue("$block_puzzle_pass", validateResult.isExtraConditionPass);
                DialogController.Instance.StartDialogNode("方块拼图完成");
            }
        }

        public void ResetGame()
        {
            ClearGame();
            Initialize();
        }
        
        public void ClearGame()
        {
            grid.Clear();
            shapeRack.Clear();
            shapeRoot.DestroyAllChildren();
        }

        // ---------------- 编辑器状态逻辑 ----------------

        /// <summary>
        /// 仅加载配置项，不应用到游戏
        /// </summary>
        public void LoadConfig()
        {
            if (BlockPuzzleKit.TryLoadBlockPuzzleData(puzzleData.puzzleName, out var blockPuzzleData))
            {
                puzzleData = blockPuzzleData;
                Debug.Log("加载配置项成功");
            }
            else
            {
                Debug.Log("加载配置项失败");
            }
        }

        /// <summary>
        /// 将配置项应用到编辑器
        /// </summary>
        public void ApplyConfig()
        {
            ClearGame();

            grid.InitializeInEditor(puzzleData.gridWidth, puzzleData.gridHeight, puzzleData.cellSize);
            shapeRack.InitInEditor(puzzleData.shapeRackDataInfos);

            foreach (var shapeData in puzzleData.gridShapeDataInfos)
            {
                var shape = shapeRack.CreateBlockShape(shapeData.shapeKey);
                shape.Rotate(shapeData.rotationAngle);
                grid.TrySnapToGrid(shape, shapeData.rootCell);
            }
        }

        public void SaveConfig()
        {
            var gridShapeDataInfos = grid.ShapeDict?.Values.ToArray();
            var shapeRackDataInfos = shapeRack.blockShapeDataList?.ToArray();

            puzzleData.gridShapeDataInfos = gridShapeDataInfos;
            puzzleData.shapeRackDataInfos = shapeRackDataInfos;

            BlockPuzzleKit.SaveBlockPuzzleData(puzzleData, puzzleData.puzzleName);
        }
        
        public void CreateShapeInEditor(string shapeKey)
        {
            shapeRack.CreateBlockShape(shapeKey);
        }
    }
}