import { _decorator, Color, Component, isValid, Layers, Node, NodeEventType, Sprite, SpriteFrame, Texture2D, tween, Tween, UIOpacity, UITransform, view } from 'cc';
const { ccclass, property } = _decorator;

export enum FuncBgType {
    None,
    Single,//打开一个 会关闭前一个
    Series,//可同时打开多个，会同时关闭
}
@ccclass('FuncBg')
export class FuncBg extends Component {
    singleTar: Node = null
    SeriesTarList: Array<Node> = []
    /** 添加功能背景，如全屏关闭的遮罩背景
     * @param node 目标节点（背景在它之下）
     * @param func 具体功能 
     * @param mode 模式，参考 FuncBgType
     * @param opacity 0 为透明背景 
     * @param useCapture 有其他上层的点击遮挡时 是否穿透
     */
    public add(node: Node, func: Function, mode: FuncBgType = 0, opacity = 100, useCapture = false) {
        let event = () => {
            if (mode == FuncBgType.Single) this.singleTar = null
            if (mode == FuncBgType.Series) this.clsoeSeries(node)
            if (!isValid(bg)) {
                console.warn("FuncBG is not find");
                return;
            }
            Tween.stopAllByTarget(bg)
            func && func()
            tween(bg.getComponent(UIOpacity)).to(time, { opacity: 0 }).call(_ => {
                bg.destroy()
            }).start()
            console.log("关闭功能背景");
            node.off("CLOSEBG")
        }
        const time = 0.05
        let bg = this.newBg(node)
        bg.once(NodeEventType.TOUCH_END, event, null, useCapture)
        tween(bg.getComponent(UIOpacity)).to(time, { opacity: opacity / 255 }).start()
        node.once("CLOSEBG", () => { event(); })
        node.once(NodeEventType.NODE_DESTROYED, () => {
            // console.warn("BG 销毁");
            isValid(bg) && bg.destroy()
        })
        node.once(NodeEventType.ACTIVE_IN_HIERARCHY_CHANGED, () => {
            // console.warn("BG 隐藏");
            isValid(bg) && bg.destroy()
        })
        if (mode == FuncBgType.Single) {
            this.clsoeLastSingle(node)
        } else if (mode == FuncBgType.Series) {
            this.SeriesTarList.push(node)
        }
    }
    newBg(tar: Node): Node {
        let bg = new Node("FuncBG");
        bg.layer = Layers.Enum.DEFAULT;
        let ui = bg.addComponent(UITransform);
        let sp = bg.addComponent(Sprite);
        let op = bg.addComponent(UIOpacity);
        sp.sizeMode = Sprite.SizeMode.CUSTOM;


        // 1. 创建纯黑纹理
        const texture = new Texture2D();
        texture.create(1, 1, Texture2D.PixelFormat.RGBA8888);
        texture.uploadData(new Uint8Array([0, 0, 0, 255])); // R,G,B,A 全0是纯黑

        // 2. 创建SpriteFrame并绑定纹理
        const spriteFrame = new SpriteFrame();
        spriteFrame.texture = texture;
        sp.spriteFrame = spriteFrame;
        sp.color = new Color(0, 0, 0, 255);
        ui.width = view.getVisibleSize().width;
        ui.height = 1600//view.getVisibleSize().height;
        bg.setPosition(ui.width / 2, ui.height / 2)
        bg.setParent(tar.parent, true)
        bg.setSiblingIndex(tar.getSiblingIndex())
        bg.toOpacity(0)
        op.opacity = 0
        return bg
    }
    /**关闭上一个 */
    clsoeLastSingle(node) {
        if (isValid(this.singleTar)) {
            this.singleTar.emit("CLOSEBG")
        }
        this.singleTar = node
    }
    /**全部关闭 */
    clsoeSeries(node) {
        let index = this.SeriesTarList.indexOf(node)
        if (index < 0) return
        this.SeriesTarList.splice(index, 1)
        this.SeriesTarList.forEach((tar) => {
            tar.emit("CLOSEBG")
        })
    }

    /** 手动关闭功能背景
   * @param node 目标节点
   */
    public close(node: Node) {
        node.emit("CLOSEBG")
    }
}
export const funcBg = new FuncBg()