const { ccclass, property } = cc._decorator;
/**
 * 数字跳动动画
 * @author 薛鸿潇
 */
@ccclass
export default class NumberAnim extends cc.Component {

    /** 动画目标 */
    private lbl_count: cc.Label = null;
    onLoad() {
        this.lbl_count = this.node.getComponent(cc.Label) || this.node.addComponent(cc.Label);
    }

    /**
     * 设置数值
     * @param new_value 目标值
     */
    public setValue(new_value: number, toFixed: number = 0) {
        if (this.targetProgress == new_value) return;
        this.toFixed = toFixed;
        this.len_target = new_value.toString().length;
        this.targetProgress = new_value;
        this.PlayMoneyAni(0.3);
    }

    //////////////////////////////////数字滚动效果//////////////////////////////////
    /** 滚动的目标值 */
    private targetProgress: number = 0;

    private delta: number = 0;
    /** 滚动中的数字 */
    private curValue: number = 0;
    private curTime: number = 0;
    private totalTime: number = 0;
    /** 上次值 */
    private lastNum: number = 0;
    /** 动画中 */
    private isPlayAni: boolean = false;
    /** 目标值长度 */
    private len_target: number = 0;
    /** 保留小数点位数 */
    private toFixed: number = 0;

    private PlayMoneyAni(time: number) {
        this.totalTime = time;
        this.delta = (this.targetProgress - this.lastNum);// / time;
        this.curValue = this.lastNum;
        this.curTime = 0;
        this.isPlayAni = true;
    }

    private PlayMoneyAniUpdate(dt) {
        if (this.isPlayAni) {
            if (this.curTime < this.totalTime) {
                this.curTime += dt;
                this.curValue += this.delta * dt;
                if (this.curValue >= this.targetProgress) {
                    this.isPlayAni = false;
                    this.curValue = this.targetProgress;
                    this.lastNum = this.targetProgress;
                }
            } else {
                this.isPlayAni = false;
                this.curTime = this.totalTime;
                this.curValue = this.targetProgress;
                this.lastNum = this.targetProgress;
            }
            if (this.curValue == this.targetProgress) {
                this.lbl_count.string = `${this.targetProgress}`;
            } else {
                if (!this.curValue) {
                    mk.console.log('数字动画出现异常：', this.curValue);
                    this.curValue = this.targetProgress;
                }
                this.lbl_count.string = this.curValue.toFixed(this.toFixed);
            }
        }
    }

    update(dt) {
        this.PlayMoneyAniUpdate(dt);
    }
}