import { _decorator, Component, Node, Button, find } from 'cc';
import { BaseSingleton } from '../Core/BaseSingleton';
import EventBus, { GameEvents } from '../Core/EventBus';
const { ccclass, property } = _decorator;

/**
 * UIStateManager
 * 负责游戏内 UI 面板的显示/隐藏，以及按钮事件分发。
 * 注意：仅处理 Canvas/GameLevelUI 下与战斗胜败相关的 UI。
 */
@ccclass('UIStateManager')
export class UIStateManager extends BaseSingleton {
    public static _instance: UIStateManager;

    @property({ type: Node, tooltip: '成功面板 (Canvas/GameSuccess)' })
    public successPanel: Node = null;

    @property({ type: Node, tooltip: '失败面板 (Canvas/GameDefeat)' })
    public defeatPanel: Node = null;

    protected init() {
        // 自动查找面板
        if (!this.successPanel) {
            this.successPanel = find('Canvas/GameSuccess');
        }
        if (!this.defeatPanel) {
            this.defeatPanel = find('Canvas/GameDefeat');
        }

        // 默认隐藏
        if (this.successPanel) this.successPanel.active = false;
        if (this.defeatPanel) this.defeatPanel.active = false;

        // 绑定按钮
        this.bindPanelButtons();

        // 监听事件
        EventBus.getInstance().on(GameEvents.GAME_SUCCESS, this.onGameSuccess, this);
        EventBus.getInstance().on(GameEvents.GAME_DEFEAT, this.onGameDefeat, this);
    }

    private bindPanelButtons() {
        this.bindButtonsInPanel(this.successPanel);
        this.bindButtonsInPanel(this.defeatPanel);
    }

    private bindButtonsInPanel(panel: Node) {
        if (!panel) return;
        const buttons = panel.getComponentsInChildren(Button);
        buttons.forEach(btn => {
            btn.node.on(Button.EventType.CLICK, () => {
                EventBus.getInstance().emit(btn.node.name.toUpperCase() + '_CLICK');
            });
        });
    }

    private onGameSuccess() {
        if (this.successPanel) this.successPanel.active = true;
    }

    private onGameDefeat() {
        if (this.defeatPanel) this.defeatPanel.active = true;
    }

    /** 对外接口 */
    public closeAllPanels() {
        if (this.successPanel) this.successPanel.active = false;
        if (this.defeatPanel) this.defeatPanel.active = false;
    }
}