using System;
using AlicizaX.Resource.Runtime;
using AlicizaX.Runtime;
using AlicizaX.Timer.Runtime;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.UI;
using Object = UnityEngine.Object;

namespace AlicizaX.UI.Runtime
{
    [DisallowMultipleComponent]
    [AddComponentMenu("Game Framework/UI")]
    [UnityEngine.Scripting.Preserve]
    public sealed partial class UIComponent : GameFrameworkComponent
    {
        [SerializeField] private GameObject uiRoot = null;

        private Transform m_InstanceRoot = null;

        private IUIManager _uiManager;

        public const int UIHideLayer = 2; // Ignore Raycast
        public const int UIShowLayer = 5; // UI

        public Camera UICamera => _uiManager?.UICamera;
        public Transform UIRoot => _uiManager.UICanvasRoot;

        protected override void Awake()
        {
            ImplementationComponentType = Utility.Assembly.GetType(componentType);
            InterfaceComponentType = typeof(IUIManager);
            base.Awake();
            _uiManager = SysModuleCenter.GetModule<IUIManager>();
            if (uiRoot == null)
            {
                throw new GameFrameworkException("UIRoot Prefab is invalid.");
            }

            GameObject obj = Instantiate(uiRoot, Vector3.zero, Quaternion.identity);
            obj.name = "------UI Root------";
            m_InstanceRoot = obj.transform;
            Object.DontDestroyOnLoad(m_InstanceRoot);
            _uiManager.Initlize(m_InstanceRoot);
        }

        private void Start()
        {
            _uiManager.SetTimerManager(SysModuleCenter.GetModule<ITimerManager>());
        }


        #region 设置安全区域

        /// <summary>
        /// 设置屏幕安全区域（异形屏支持）。
        /// </summary>
        /// <param name="safeRect">安全区域</param>
        public void ApplyScreenSafeRect(Rect safeRect)
        {
            CanvasScaler scaler = _uiManager.UICanvasRoot.GetComponent<CanvasScaler>();
            if (scaler == null)
            {
                Log.Error($"Not found {nameof(CanvasScaler)} !");
                return;
            }

            // Convert safe area rectangle from absolute pixels to UGUI coordinates
            float rateX = scaler.referenceResolution.x / Screen.width;
            float rateY = scaler.referenceResolution.y / Screen.height;
            float posX = (int)(safeRect.position.x * rateX);
            float posY = (int)(safeRect.position.y * rateY);
            float width = (int)(safeRect.size.x * rateX);
            float height = (int)(safeRect.size.y * rateY);

            float offsetMaxX = scaler.referenceResolution.x - width - posX;
            float offsetMaxY = scaler.referenceResolution.y - height - posY;

            // 注意：安全区坐标系的原点为左下角
            var rectTrans = _uiManager.UICanvasRoot.transform as RectTransform;
            if (rectTrans != null)
            {
                rectTrans.offsetMin = new Vector2(posX, posY); //锚框状态下的屏幕左下角偏移向量
                rectTrans.offsetMax = new Vector2(-offsetMaxX, -offsetMaxY); //锚框状态下的屏幕右上角偏移向量
            }
        }

        /// <summary>
        /// 模拟IPhoneX异形屏
        /// </summary>
        public void SimulateIPhoneXNotchScreen()
        {
            Rect rect;
            if (Screen.height > Screen.width)
            {
                // 竖屏Portrait
                float deviceWidth = 1125;
                float deviceHeight = 2436;
                rect = new Rect(0f / deviceWidth, 102f / deviceHeight, 1125f / deviceWidth, 2202f / deviceHeight);
            }
            else
            {
                // 横屏Landscape
                float deviceWidth = 2436;
                float deviceHeight = 1125;
                rect = new Rect(132f / deviceWidth, 63f / deviceHeight, 2172f / deviceWidth, 1062f / deviceHeight);
            }

            Rect safeArea = new Rect(Screen.width * rect.x, Screen.height * rect.y, Screen.width * rect.width, Screen.height * rect.height);
            ApplyScreenSafeRect(safeArea);
        }

        #endregion


        public T ShowUI<T>(params System.Object[] userDatas) where T : UIWindow
        {
            return (T)ShowUI(typeof(T), userDatas);
        }

        public async UniTask<T> ShowUIAsync<T>(params System.Object[] userDatas) where T : UIWindow
        {
            return (T)await ShowUIAsync(typeof(T), userDatas);
        }

        public UIBase ShowUI(string windowName, params System.Object[] userDatas)
        {
            Type uiType = UITypeCollector.GetUIInst(windowName);
            GameFrameworkGuard.NotNull(uiType, nameof(uiType));
            return ShowUI(uiType, userDatas);
        }

        public async UniTask<UIBase> ShowUIAsync(string windowName, params System.Object[] userDatas)
        {
            Type uiType = UITypeCollector.GetUIInst(windowName);
            GameFrameworkGuard.NotNull(uiType, nameof(uiType));
            return await ShowUIAsync(uiType, userDatas);
        }

        public void CloseUI<T>(bool force = false) where T : UIWindow
        {
            CloseUI(typeof(T), force);
        }

        public T GetUI<T>() where T : UIWindow
        {
            return (T)GetUI(typeof(T));
        }


        public UIBase ShowUI(Type type, params System.Object[] userDatas)
        {
            return _uiManager.ShowUI(type, userDatas);
        }

        public async UniTask<UIBase> ShowUIAsync(Type type, params System.Object[] userDatas)
        {
            return await _uiManager.ShowUIAsync(type, userDatas);
        }

        private void CloseUI(Type type, bool force = false)
        {
            _uiManager.CloseUI(type, force);
        }

        private UIBase GetUI(Type type)
        {
            return _uiManager.GetUI(type);
        }
    }
}