using System;
using UnityEngine;

namespace AibisDream.UI.Terminal
{
    public class TerminalStartPanel : MonoBehaviour, IUIPanel
    {
        [SerializeField] private TerminalPanelAnimator panelAnimator;
        [SerializeField] private TerminalHeaderView header;
        [SerializeField] private TerminalMenuItemView newGameItem;
        [SerializeField] private TerminalMenuItemView chapterItem;
        [SerializeField] private TerminalMenuItemView settingItem;
        [SerializeField] private TerminalMenuItemView quitItem;

        public bool IsOpen => gameObject.activeSelf;
        public bool IsCloseable => false;

        private TerminalMenuItemView _selectedItem;

        private void Awake()
        {
            RegisterItem(newGameItem, StartNewGame);
            RegisterItem(chapterItem, OpenChapter);
            RegisterItem(settingItem, OpenSetting);
            RegisterItem(quitItem, QuitApp);
        }

        private void OnDestroy()
        {
            UnregisterItem(newGameItem);
            UnregisterItem(chapterItem);
            UnregisterItem(settingItem);
            UnregisterItem(quitItem);
        }

        public void Show()
        {
            // header?.SetText("<选择章节>", "CHAPER xx/xxx - LOADING - DT");
            // newGameItem?.SetContent("新游戏.....", "pending", "Current date: 04/2020");
            // chapterItem?.SetContent("选择章节....", "check ok", "Current date: 00/2020");
            // settingItem?.SetContent("设置.......", "pending", "Current date: xx/xxxx");
            // quitItem?.SetContent("退出.......", "-----", "-----: 00/0000", isDanger: true);
            // SelectItem(chapterItem != null ? chapterItem : newGameItem);
            if (panelAnimator != null)
            {
                panelAnimator.Show();
            }
            else
            {
                gameObject.SetActive(true);
            }
        }

        public void Hide()
        {
            if (panelAnimator != null)
            {
                panelAnimator.Hide();
            }
            else
            {
                gameObject.SetActive(false);
            }
        }

        private void RegisterItem(TerminalMenuItemView item, Action action)
        {
            if (item == null)
            {
                return;
            }

            item.Hovered += SelectItem;
            item.Clicked += _ => action?.Invoke();
        }

        private void UnregisterItem(TerminalMenuItemView item)
        {
            if (item == null)
            {
                return;
            }

            item.Hovered -= SelectItem;
        }

        private void SelectItem(TerminalMenuItemView item)
        {
            if (_selectedItem != null)
            {
                _selectedItem.SetSelected(false);
            }

            _selectedItem = item;
            _selectedItem?.SetSelected(true);
        }

        private static void StartNewGame()
        {
            GameManager.Instance.StartNewGame();
        }

        private static void OpenChapter()
        {
            UIManager.Instance.ShowPreferredChapterPanel();
        }

        private static void OpenSetting()
        {
            UIManager.Instance.ShowPreferredSettingPanel();
        }

        private static void QuitApp()
        {
            GameManager.Instance.QuitApp();
        }
    }
}