using PMaker.DependencyInjection;

using System.Collections.Generic;
using System.Linq;

using UnityEngine;

namespace PMaker.UI
{
    //Unity API
    public partial class UIPresenter : SingletonMonobehaviour
    {
        protected override void Awake()
        {
            base.Awake();
            RuntimeInit();
        }

        private void Reset()
        {
            this._root = this.GetComponentInParent<UIRoot>();
        }
    }

    public partial class UIPresenter
    {
        [SerializeField]
        private UIRoot _root;
        [SerializeField]
#if ODIN_INSPECTOR
        [Sirenix.OdinInspector.ReadOnly]
#endif
        Dictionary<string, Page> _pageMapper;
    }

    // Public API
    public partial class UIPresenter : IUIPresenter
    {
        public Page this[string pageName]
        {
            get
            {
                return this.GetPage(pageName);
            }

            set
            {
                this.SetPage(value);
            }
        }

        public void ShowPage<T>() where T : IPage
        {
            this.GetPage(typeof(T).Name)?.Show();
        }

        public void HidePage<T>() where T : IPage
        {
            this.GetPage(typeof(T).Name)?.Hide();
        }

        public bool IsInit { get; protected set; }

        Page GetPage<T>() where T : IPage
        {
            return this.GetPage(typeof(T).Name);
        }

        Page GetPage(string pageName)
        {
            if (_pageMapper.ContainsKey(pageName))
            {
                return _pageMapper[pageName];
            }
            else
            {
                Debug.Log($"{pageName}不存在");
                return default;
            }
        }

        void SetPage<T>(T page) where T : Page
        {
            var pageName = typeof(T).Name;
            if (_pageMapper.ContainsKey(pageName))
            {
                Debug.Log($"{pageName}已存在");
            }
            else
            {
                _pageMapper[pageName] = page;
            }
        }
    }

    // Initializer
    public partial class UIPresenter
    {
#if ODIN_INSPECTOR
        [Sirenix.OdinInspector.Button]
#endif
        [ContextMenu("EditorInit")]
        void EditorInit()
        {
            InitMapper();
#if UNITY_EDITOR
            UnityEditor.EditorUtility.SetDirty(this);
#endif
        }

        private IEnumerable<Page> GetAllPage()
        {
            var pages = this._root.Pages.GetComponentsInChildren<Page>(true);
            var canvasPages = this._root.CanvasPages.GetComponentsInChildren<Page>(true);
            var allPages = pages.AsEnumerable()
                                .Concat(canvasPages.AsEnumerable());
            return allPages;
        }

        private void InitMapper()
        {
            var pages = GetAllPage().ToArray();
            _pageMapper = new Dictionary<string, Page>();
            foreach (var item in pages)
            {
                _pageMapper[item.GetType().Name] = item;
            }
        }

        private void RuntimeInit()
        {
#if ODIN_INSPECTOR
            if (this._pageMapper == null)
            {
                InitMapper();
            }
#else
            InitMapper();
#endif
            this.IsInit = true;
        }
    }
}