using System;
using System.Collections;
using System.Collections.Generic;
using Unity.Mathematics;
using UnityEngine;
using UnityEngine.UIElements;

namespace BITKit.UX
{
    public class OnScreenGamepad : OnScreenControl
    {
        public new class UxmlFactory : UxmlFactory<OnScreenGamepad, UxmlTraits> { }
        protected override string ControlPathInternal { get; set; }
        private readonly Dictionary<Vector2Int, VisualElement> _buttonMap = new();
        public OnScreenGamepad()
        {
            IsEnabled.AddListener(OnActive);
            for (var y = 1; y >=-1; y--)
            {
                var row = this.Create<VisualElement>();
                row.style.flexGrow = 1;
                row.style.flexDirection = FlexDirection.Row;
                for (var x = -1; x <= 1; x++)
                {
                    var dir = (x, y) switch
                    {
                        (-1, 1) => "NW",  // 西北
                        (0, 1) => "N",    // 北
                        (1, 1) => "NE",   // 东北
                        (-1, 0) => "W",    // 西
                        (0, 0) => "C",     // 中心
                        (1, 0) => "E",     // 东
                        (-1, -1) => "SW",   // 西南
                        (0, -1) => "S",     // 南
                        (1, -1) => "SE",    // 东南
                        _ => "NULL"        // 其他无效位置
                    };
                    var value = (x, y) switch
                    {
                        (-1, -1) => new float2(-0.707f, -0.707f),  // NW 西北
                        (0, -1) =>new float2 (0f, -1f),             // N    北
                        (1, -1) =>new float2 (0.707f, -0.707f),    // NE 东北
                        (-1, 0) => new float2(-1f, 0f),            // W 西
                        (0, 0) =>new float2 (0f, 0f),              // C 中心
                        (1, 0) =>new float2 (1f, 0f),              // E 东
                        (-1, 1) => new float2(-0.707f, 0.707f),   // SW 西南
                        (0, 1) =>new float2 (0f, 1f),             // S 南
                        (1, 1) => new float2(0.707f, 0.707f),   // SE 东南
                        _ => new float2(0f, 0f)                    // 默认返回 (0, 0) 无效位置
                    };
                    
                    var button = row.Create<VisualElement>();
              
                    
                    _buttonMap.TryAdd(new Vector2Int(x, y), button);

                    button.style.flexGrow = 1;
                    
                    button.AddToClassList("gamepad-button");
                    button.AddToClassList($"gamepad-button--{dir.ToLower()}");
                    
                    button.AddManipulator(new Clickable(()=>{}));
                    
                    button.RegisterCallback<PointerOverEvent>(_ =>
                    {
                        SendValueToControl((Vector2)value);
                    });
                    button.RegisterCallback<PointerUpEvent>(_ =>
                    {
                        SendValueToControl((Vector2)default);
                    });
                    
                    // var label = button.Create<Label>();
                    // label.style.flexGrow = 1;
                    //
                    // label.text = $"{value.x},{value.y}";

                }
            }
        }

        private void OnActive(bool obj)
        {
            if (obj is false)
            {
                SendValueToControl((Vector2)default);
            }
        }
    }

}