const { ccclass, property, requireComponent, menu } = cc._decorator;

@ccclass("State_AnimationRandomPlay")
export class State_AnimationRandomPlay {
    @property({ displayName: "最少時間", type: cc.Float })
    public mintime: number = 0;
    @property({ displayName: "最多時間", type: cc.Float })
    public maxtime: number = 0;
    @property({ displayName: "權重", type: cc.Integer })
    public weight: number = 0;
    @property({ displayName: "動畫", type: cc.AnimationClip })
    public clip: cc.AnimationClip = null;
}

@ccclass
@menu("Plug-in/Animation/AnimationRandomPlay")
@requireComponent(cc.Animation)
/** 可以根據權重決定多久後隨機播放甚麼動畫 */
export class AnimationRandomPlay extends cc.Component {
    //#region public 外調參數

    @property({ type: State_AnimationRandomPlay })
    public states: State_AnimationRandomPlay[] = [];

    //#endregion

    //#region public 屬性

    public nowPlayName: string = "";
    public nextPlayName: string = "";
    public nextPlayTime: number = null;

    //#endregion

    //#region private 屬性

    private _animation: cc.Animation = null;
    private _weightAll: number[] = [];
    private _weightAllNum: number = 0;

    //#endregion

    //#region get set

    get animation(): cc.Animation {
        if (this._animation == null) {
            this._animation = this.node.getComponent(cc.Animation);
        }
        return this._animation;
    }

    //#endregion

    //#region Lifecycle

    onLoad(): void {
        let self: this = this;
        let weight: number = 0;
        for (let i: number = 0; i < this.states.length; i++) {
            weight += this.states[i].weight;
            this._weightAll.push(weight);
            this._weightAllNum += this.states[i].weight;
        }

        // 一般動畫
        this.animation.on("finished", () => {
            self.GetNextAnim();
        }, this);

        // 不一般動畫 (X
        // Loop動畫
        this.animation.on("lastframe", () => {
            self.animation.setCurrentTime(0);
            self.animation.stop();
            self.GetNextAnim();
        }, this);
    }

    onEnable(): void {
        this.GetNextAnim();
    }

    onDisable(): void {
        this.nextPlayName = "";
        this.nextPlayTime = null;
        this.animation.setCurrentTime(0);
        this.animation.stop();
    }

    onDestroy(): void {
        this.animation.targetOff(this);
        // let self: this = this;
        // this.animation.off("finished", () => {
        //     self.GetNextAnim();
        // }, this);
        // this.animation.off("lastframe", () => {
        //     self.animation.setCurrentTime(0);
        //     self.animation.stop();
        //     self.GetNextAnim();
        // }, this);
    }

    update(dt: number): void {
        let time: number = Date.now();
        if (this.nextPlayTime && time >= this.nextPlayTime) {
            this.nowPlayName = this.nextPlayName;
            if (this.animation.getAnimationState(this.nextPlayName)) {
                this.animation.play(this.nextPlayName);
            } else {
                console.error(`this node(${this.node.name}) not has animation(${this.nextPlayName})`);
                this.animation.addClip(this.GetClip_From_states(this.nextPlayName));
                if (this.animation.getAnimationState(this.nextPlayName)) {
                    console.warn(`this node(${this.node.name}) add animation(${this.nextPlayName})`);
                    this.animation.play(this.nextPlayName);
                }
            }
            this.nextPlayName = "";
            this.nextPlayTime = null;
        }
    }

    //#endregion

    //#region Custom Function

    /** 取得下一隻動畫的時間&名稱 */
    GetNextAnim(): void {
        let random: number = Math.floor(Math.random() * this._weightAllNum) + 1;
        for (let i: number = 0; i < this._weightAll.length; i++) {
            if (random <= this._weightAll[i]) {
                let time: number = Math.floor(Math.random() * (this.states[i].maxtime - this.states[i].mintime + 1)) + this.states[i].mintime;
                this.nextPlayTime = Date.now() + (time * 1000);
                this.nextPlayName = this.states[i].clip.name;
                // if (CC_DEBUG) {
                //     let date: Date = new Date(this.nextPlayTime);
                //     console.log(`nextWaitTime: ${time}, nextPlayTime: ${date.getHours()}:${date.getMinutes()}:${date.getSeconds()}, nextPlayName: ${this.nextPlayName}`);
                // }
                break;
            }
        }
    }

    /** 取得下一隻動畫的時間&名稱 */
    GetClip_From_states(name: string): cc.AnimationClip {
        for (let i: number = 0; i < this.states.length; i++) {
            if (this.states[i].clip.name === name) {
                return this.states[i].clip;
            }
        }
    }

    //#endregion
}