using UnityEngine;
using UnityEngine.Events;
using UnityEngine.UI;

namespace AssetUpdate
{
    public class LiteConfirmWin : LiteWindow
    {
        private const string _path = "Prefab/LiteConfirmWin";
        private LiteConfirmButtonData[] _buttonData;
        private RectTransform _buttonRoot;
        private Button[] _buttons;
        private Text _content;
        private Text _title;

        protected override void Awake()
        {
            base.Awake();
            _title = panelRoot.Find("TitleBar/Text").GetComponent<Text>();
            _content = panelRoot.Find("Text").GetComponent<Text>();
            var buttonRoot = panelRoot.Find("Buttons");
            var count = buttonRoot.childCount;
            _buttons = new Button[count];
            for (var i = 0; i < count; i++)
            {
                _buttons[i] = buttonRoot.GetChild(i).GetComponent<Button>();
                _buttons[i].gameObject.SetActive(false);
            }
        }

        private void Init(string title, string content, params LiteConfirmButtonData[] buttons)
        {
            _title.text = title;
            _content.text = content;
            _buttonData = buttons;
            for (var i = 0; i < _buttons.Length; i++)
                if (i < buttons.Length)
                {
                    var index = i;
                    _buttons[i].onClick.AddListener(() => OnClick(index));
                    _buttons[i].gameObject.SetActive(true);
                    var text = _buttons[i].GetComponentInChildren<Text>();
                    text.text = buttons[i].text;
                }
                else
                {
                    _buttons[i].gameObject.SetActive(false);
                }
        }

        private void OnClick(int index)
        {
            Close();
            if (index < _buttonData.Length)
            {
                var callback = _buttonData[index].callBack;
                if (callback != null)
                    callback();
            }
        }

        public static void Open(string title, string content, params LiteConfirmButtonData[] buttons)
        {
            var canvas = FindObjectOfType<Canvas>();
            if (!canvas)
            {
                Debug.LogError("Cannot find canvas in current scene!");
            }
            else
            {
                var prefab = Resources.Load<GameObject>(_path);
                if (!prefab)
                    Debug.LogError(string.Format("Cannot load window from {0}", _path));
                {
                    var instance = Instantiate(prefab, canvas.transform);
                    var component = instance.AddComponent<LiteConfirmWin>();
                    component.Init(title, content, buttons);
                }
            }
        }
    }

    public class LiteConfirmButtonData
    {
        public readonly UnityAction callBack;
        public readonly string text;

        public LiteConfirmButtonData(string content)
        {
            text = content;
        }

        public LiteConfirmButtonData(string content, UnityAction callBack) : this(content)
        {
            this.callBack = callBack;
        }
    }
}