import { isDefined } from '../util/util';
/**
 * @hidden
 */
export class Animation {
    constructor(plt, ele, opts) {
        this._dur = null;
        this._es = null;
        this._rvEs = null;
        this.hasChildren = false;
        this.isPlaying = false;
        this.hasCompleted = false;
        this.plt = plt;
        this.element(ele);
        this.opts = opts;
    }
    element(ele) {
        if (ele) {
            if (typeof ele === 'string') {
                ele = this.plt.doc().querySelectorAll(ele);
                for (let i = 0; i < ele.length; i++) {
                    this._addEle(ele[i]);
                }
            }
            else if (ele.length) {
                for (let i = 0; i < ele.length; i++) {
                    this._addEle(ele[i]);
                }
            }
            else {
                this._addEle(ele);
            }
        }
        return this;
    }
    /**
     * NO DOM
     */
    _addEle(ele) {
        if (ele.nativeElement) {
            ele = ele.nativeElement;
        }
        if (ele.nodeType === 1) {
            this._eL = (this._e = this._e || []).push(ele);
        }
    }
    /**
     * Add a child animation to this animation.
     */
    add(childAnimation) {
        childAnimation.parent = this;
        this.hasChildren = true;
        this._cL = (this._c = this._c || []).push(childAnimation);
        return this;
    }
    /**
     * Get the duration of this animation. If this animation does
     * not have a duration, then it'll get the duration from its parent.
     */
    getDuration(opts) {
        if (opts && isDefined(opts.duration)) {
            return opts.duration;
        }
        else if (this._dur !== null) {
            return this._dur;
        }
        else if (this.parent) {
            return this.parent.getDuration();
        }
        return 0;
    }
    /**
     * Returns if the animation is a root one.
     */
    isRoot() {
        return !this.parent;
    }
    /**
     * Set the duration for this animation.
     */
    duration(milliseconds) {
        this._dur = milliseconds;
        return this;
    }
    /**
     * Get the easing of this animation. If this animation does
     * not have an easing, then it'll get the easing from its parent.
     */
    getEasing() {
        if (this._rv && this._rvEs) {
            return this._rvEs;
        }
        return this._es !== null ? this._es : (this.parent && this.parent.getEasing()) || null;
    }
    /**
     * Set the easing for this animation.
     */
    easing(name) {
        this._es = name;
        return this;
    }
    /**
     * Set the easing for this reversed animation.
     */
    easingReverse(name) {
        this._rvEs = name;
        return this;
    }
    /**
     * Add the "from" value for a specific property.
     */
    from(prop, val) {
        this._addProp('from', prop, val);
        return this;
    }
    /**
     * Add the "to" value for a specific property.
     */
    to(prop, val, clearProperyAfterTransition) {
        const fx = this._addProp('to', prop, val);
        if (clearProperyAfterTransition) {
            // if this effect is a transform then clear the transform effect
            // otherwise just clear the actual property
            this.afterClearStyles([fx.trans ? this.plt.Css.transform : prop]);
        }
        return this;
    }
    /**
     * Shortcut to add both the "from" and "to" for the same property.
     */
    fromTo(prop, fromVal, toVal, clearProperyAfterTransition) {
        return this.from(prop, fromVal).to(prop, toVal, clearProperyAfterTransition);
    }
    /**
     * @hidden
     * NO DOM
     */
    _getProp(name) {
        if (this._fx) {
            return this._fx.find((prop) => prop.name === name);
        }
        else {
            this._fx = [];
        }
        return null;
    }
    _addProp(state, prop, val) {
        let fxProp = this._getProp(prop);
        if (!fxProp) {
            // first time we've see this EffectProperty
            const shouldTrans = (ANIMATION_TRANSFORMS[prop] === 1);
            fxProp = {
                name: prop,
                trans: shouldTrans,
                // add the will-change property for transforms or opacity
                wc: (shouldTrans ? this.plt.Css.transform : prop)
            };
            this._fx.push(fxProp);
        }
        // add from/to EffectState to the EffectProperty
        let fxState = {
            val: val,
            num: null,
            unit: '',
        };
        fxProp[state] = fxState;
        if (typeof val === 'string' && val.indexOf(' ') < 0) {
            let r = val.match(ANIMATION_CSS_VALUE_REGEX);
            let num = parseFloat(r[1]);
            if (!isNaN(num)) {
                fxState.num = num;
            }
            fxState.unit = (r[0] !== r[2] ? r[2] : '');
        }
        else if (typeof val === 'number') {
            fxState.num = val;
        }
        return fxProp;
    }
    /**
     * Add CSS class to this animation's elements
     * before the animation begins.
     */
    beforeAddClass(className) {
        (this._bfAdd = this._bfAdd || []).push(className);
        return this;
    }
    /**
     * Remove CSS class from this animation's elements
     * before the animation begins.
     */
    beforeRemoveClass(className) {
        (this._bfRm = this._bfRm || []).push(className);
        return this;
    }
    /**
     * Set CSS inline styles to this animation's elements
     * before the animation begins.
     */
    beforeStyles(styles) {
        this._bfSty = styles;
        return this;
    }
    /**
     * Clear CSS inline styles from this animation's elements
     * before the animation begins.
     */
    beforeClearStyles(propertyNames) {
        this._bfSty = this._bfSty || {};
        for (let i = 0; i < propertyNames.length; i++) {
            this._bfSty[propertyNames[i]] = '';
        }
        return this;
    }
    /**
     * Add a function which contains DOM reads, which will run
     * before the animation begins.
     */
    beforeAddRead(domReadFn) {
        (this._rdFn = this._rdFn || []).push(domReadFn);
        return this;
    }
    /**
     * Add a function which contains DOM writes, which will run
     * before the animation begins.
     */
    beforeAddWrite(domWriteFn) {
        (this._wrFn = this._wrFn || []).push(domWriteFn);
        return this;
    }
    /**
     * Add CSS class to this animation's elements
     * after the animation finishes.
     */
    afterAddClass(className) {
        (this._afAdd = this._afAdd || []).push(className);
        return this;
    }
    /**
     * Remove CSS class from this animation's elements
     * after the animation finishes.
     */
    afterRemoveClass(className) {
        (this._afRm = this._afRm || []).push(className);
        return this;
    }
    /**
     * Set CSS inline styles to this animation's elements
     * after the animation finishes.
     */
    afterStyles(styles) {
        this._afSty = styles;
        return this;
    }
    /**
     * Clear CSS inline styles from this animation's elements
     * after the animation finishes.
     */
    afterClearStyles(propertyNames) {
        this._afSty = this._afSty || {};
        for (let i = 0; i < propertyNames.length; i++) {
            this._afSty[propertyNames[i]] = '';
        }
        return this;
    }
    /**
     * Play the animation.
     */
    play(opts) {
        // If the animation was already invalidated (it did finish), do nothing
        if (!this.plt) {
            return;
        }
        // this is the top level animation and is in full control
        // of when the async play() should actually kick off
        // if there is no duration then it'll set the TO property immediately
        // if there is a duration, then it'll stage all animations at the
        // FROM property and transition duration, wait a few frames, then
        // kick off the animation by setting the TO property for each animation
        this._isAsync = this._hasDuration(opts);
        // ensure all past transition end events have been cleared
        this._clearAsync();
        // recursively kicks off the correct progress step for each child animation
        // ******** DOM WRITE ****************
        this._playInit(opts);
        // doubling up RAFs since this animation was probably triggered
        // from an input event, and just having one RAF would have this code
        // run within the same frame as the triggering input event, and the
        // input event probably already did way too much work for one frame
        this.plt.raf(() => {
            this.plt.raf(this._playDomInspect.bind(this, opts));
        });
    }
    syncPlay() {
        // If the animation was already invalidated (it did finish), do nothing
        if (!this.plt) {
            return;
        }
        const opts = { duration: 0 };
        this._isAsync = false;
        this._clearAsync();
        this._playInit(opts);
        this._playDomInspect(opts);
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _playInit(opts) {
        // always default that an animation does not tween
        // a tween requires that an Animation class has an element
        // and that it has at least one FROM/TO effect
        // and that the FROM/TO effect can tween numeric values
        this._twn = false;
        this.isPlaying = true;
        this.hasCompleted = false;
        this._hasDur = (this.getDuration(opts) > ANIMATION_DURATION_MIN);
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i]._playInit(opts);
        }
        if (this._hasDur) {
            // if there is a duration then we want to start at step 0
            // ******** DOM WRITE ****************
            this._progress(0);
            // add the will-change properties
            // ******** DOM WRITE ****************
            this._willChg(true);
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * NO RECURSION
     * ROOT ANIMATION
     */
    _playDomInspect(opts) {
        // fire off all the "before" function that have DOM READS in them
        // elements will be in the DOM, however visibily hidden
        // so we can read their dimensions if need be
        // ******** DOM READ ****************
        // ******** DOM WRITE ****************
        this._beforeAnimation();
        // for the root animation only
        // set the async TRANSITION END event
        // and run onFinishes when the transition ends
        const dur = this.getDuration(opts);
        if (this._isAsync) {
            this._asyncEnd(dur, true);
        }
        // ******** DOM WRITE ****************
        this._playProgress(opts);
        if (this._isAsync && this.plt) {
            // this animation has a duration so we need another RAF
            // for the CSS TRANSITION properties to kick in
            this.plt.raf(this._playToStep.bind(this, 1));
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _playProgress(opts) {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i]._playProgress(opts);
        }
        if (this._hasDur) {
            // set the CSS TRANSITION duration/easing
            // ******** DOM WRITE ****************
            this._setTrans(this.getDuration(opts), false);
        }
        else {
            // this animation does not have a duration, so it should not animate
            // just go straight to the TO properties and call it done
            // ******** DOM WRITE ****************
            this._progress(1);
            // since there was no animation, immediately run the after
            // ******** DOM WRITE ****************
            this._setAfterStyles();
            // this animation has no duration, so it has finished
            // other animations could still be running
            this._didFinish(true);
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _playToStep(stepValue) {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i]._playToStep(stepValue);
        }
        if (this._hasDur) {
            // browser had some time to render everything in place
            // and the transition duration/easing is set
            // now set the TO properties which will trigger the transition to begin
            // ******** DOM WRITE ****************
            this._progress(stepValue);
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * NO RECURSION
     * ROOT ANIMATION
     */
    _asyncEnd(dur, shouldComplete) {
        (void 0) /* assert */;
        (void 0) /* assert */;
        (void 0) /* assert */;
        const self = this;
        function onTransitionEnd() {
            // congrats! a successful transition completed!
            // ensure transition end events and timeouts have been cleared
            self._clearAsync();
            // ******** DOM WRITE ****************
            self._playEnd();
            // transition finished
            self._didFinishAll(shouldComplete, true, false);
        }
        function onTransitionFallback() {
            (void 0) /* console.debug */;
            // oh noz! the transition end event didn't fire in time!
            // instead the fallback timer when first
            // if all goes well this fallback should never fire
            // clear the other async end events from firing
            self._tm = undefined;
            self._clearAsync();
            // set the after styles
            // ******** DOM WRITE ****************
            self._playEnd(shouldComplete ? 1 : 0);
            // transition finished
            self._didFinishAll(shouldComplete, true, false);
        }
        // set the TRANSITION END event on one of the transition elements
        self._unrgTrns = this.plt.transitionEnd(self._transEl(), onTransitionEnd, false);
        // set a fallback timeout if the transition end event never fires, or is too slow
        // transition end fallback: (animation duration + XXms)
        self._tm = self.plt.timeout(onTransitionFallback, (dur + ANIMATION_TRANSITION_END_FALLBACK_PADDING_MS));
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _playEnd(stepValue) {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i]._playEnd(stepValue);
        }
        if (this._hasDur) {
            if (isDefined(stepValue)) {
                // too late to have a smooth animation, just finish it
                // ******** DOM WRITE ****************
                this._setTrans(0, true);
                // ensure the ending progress step gets rendered
                // ******** DOM WRITE ****************
                this._progress(stepValue);
            }
            // set the after styles
            // ******** DOM WRITE ****************
            this._setAfterStyles();
            // remove the will-change properties
            // ******** DOM WRITE ****************
            this._willChg(false);
        }
    }
    /**
     * @hidden
     * NO DOM
     * RECURSION
     */
    _hasDuration(opts) {
        if (this.getDuration(opts) > ANIMATION_DURATION_MIN) {
            return true;
        }
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            if (children[i]._hasDuration(opts)) {
                return true;
            }
        }
        return false;
    }
    /**
     * @hidden
     * NO DOM
     * RECURSION
     */
    _hasDomReads() {
        if (this._rdFn && this._rdFn.length) {
            return true;
        }
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            if (children[i]._hasDomReads()) {
                return true;
            }
        }
        return false;
    }
    /**
     * Immediately stop at the end of the animation.
     */
    stop(stepValue = 1) {
        // ensure all past transition end events have been cleared
        this._clearAsync();
        this._hasDur = true;
        this._playEnd(stepValue);
    }
    /**
     * @hidden
     * NO DOM
     * NO RECURSION
     */
    _clearAsync() {
        this._unrgTrns && this._unrgTrns();
        this._tm && clearTimeout(this._tm);
        this._tm = this._unrgTrns = undefined;
    }
    /**
     * @hidden
     * DOM WRITE
     * NO RECURSION
     */
    _progress(stepValue) {
        // bread 'n butter
        let val;
        let effects = this._fx;
        let nuElements = this._eL;
        if (!effects || !nuElements) {
            return;
        }
        // flip the number if we're going in reverse
        if (this._rv) {
            stepValue = ((stepValue * -1) + 1);
        }
        let i, j;
        let finalTransform = '';
        const elements = this._e;
        for (i = 0; i < effects.length; i++) {
            const fx = effects[i];
            if (fx.from && fx.to) {
                const fromNum = fx.from.num;
                const toNum = fx.to.num;
                const tweenEffect = (fromNum !== toNum);
                (void 0) /* assert */;
                if (tweenEffect) {
                    this._twn = true;
                }
                if (stepValue === 0) {
                    // FROM
                    val = fx.from.val;
                }
                else if (stepValue === 1) {
                    // TO
                    val = fx.to.val;
                }
                else if (tweenEffect) {
                    // EVERYTHING IN BETWEEN
                    let valNum = (((toNum - fromNum) * stepValue) + fromNum);
                    const unit = fx.to.unit;
                    if (unit === 'px') {
                        valNum = Math.round(valNum);
                    }
                    val = valNum + unit;
                }
                if (val !== null) {
                    const prop = fx.name;
                    if (fx.trans) {
                        finalTransform += prop + '(' + val + ') ';
                    }
                    else {
                        for (j = 0; j < nuElements; j++) {
                            // ******** DOM WRITE ****************
                            elements[j].style[prop] = val;
                        }
                    }
                }
            }
        }
        // place all transforms on the same property
        if (finalTransform.length) {
            if (!this._rv && stepValue !== 1 || this._rv && stepValue !== 0) {
                finalTransform += 'translateZ(0px)';
            }
            const cssTransform = this.plt.Css.transform;
            for (i = 0; i < elements.length; i++) {
                // ******** DOM WRITE ****************
                elements[i].style[cssTransform] = finalTransform;
            }
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * NO RECURSION
     */
    _setTrans(dur, forcedLinearEasing) {
        // Transition is not enabled if there are not effects
        if (!this._fx) {
            return;
        }
        // set the TRANSITION properties inline on the element
        const elements = this._e;
        const easing = (forcedLinearEasing ? 'linear' : this.getEasing());
        const durString = dur + 'ms';
        const Css = this.plt.Css;
        const cssTransform = Css.transition;
        const cssTransitionDuration = Css.transitionDuration;
        const cssTransitionTimingFn = Css.transitionTimingFn;
        let eleStyle;
        for (let i = 0; i < this._eL; i++) {
            eleStyle = elements[i].style;
            if (dur > 0) {
                // ******** DOM WRITE ****************
                eleStyle[cssTransform] = '';
                eleStyle[cssTransitionDuration] = durString;
                // each animation can have a different easing
                if (easing) {
                    // ******** DOM WRITE ****************
                    eleStyle[cssTransitionTimingFn] = easing;
                }
            }
            else {
                eleStyle[cssTransform] = 'none';
            }
        }
    }
    /**
     * @hidden
     * DOM READ
     * DOM WRITE
     * RECURSION
     */
    _beforeAnimation() {
        // fire off all the "before" function that have DOM READS in them
        // elements will be in the DOM, however visibily hidden
        // so we can read their dimensions if need be
        // ******** DOM READ ****************
        this._fireBeforeReadFunc();
        // ******** DOM READS ABOVE / DOM WRITES BELOW ****************
        // fire off all the "before" function that have DOM WRITES in them
        // ******** DOM WRITE ****************
        this._fireBeforeWriteFunc();
        // stage all of the before css classes and inline styles
        // ******** DOM WRITE ****************
        this._setBeforeStyles();
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _setBeforeStyles() {
        let i, j;
        const children = this._c;
        for (i = 0; i < this._cL; i++) {
            children[i]._setBeforeStyles();
        }
        // before the animations have started
        // only set before styles if animation is not reversed
        if (this._rv) {
            return;
        }
        const addClasses = this._bfAdd;
        const removeClasses = this._bfRm;
        let ele;
        let eleClassList;
        let prop;
        for (i = 0; i < this._eL; i++) {
            ele = this._e[i];
            eleClassList = ele.classList;
            // css classes to add before the animation
            if (addClasses) {
                for (j = 0; j < addClasses.length; j++) {
                    // ******** DOM WRITE ****************
                    eleClassList.add(addClasses[j]);
                }
            }
            // css classes to remove before the animation
            if (removeClasses) {
                for (j = 0; j < removeClasses.length; j++) {
                    // ******** DOM WRITE ****************
                    eleClassList.remove(removeClasses[j]);
                }
            }
            // inline styles to add before the animation
            if (this._bfSty) {
                for (prop in this._bfSty) {
                    // ******** DOM WRITE ****************
                    ele.style[prop] = this._bfSty[prop];
                }
            }
        }
    }
    /**
     * @hidden
     * DOM READ
     * RECURSION
     */
    _fireBeforeReadFunc() {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM READ ****************
            children[i]._fireBeforeReadFunc();
        }
        const readFunctions = this._rdFn;
        if (readFunctions) {
            for (let i = 0; i < readFunctions.length; i++) {
                // ******** DOM READ ****************
                readFunctions[i]();
            }
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _fireBeforeWriteFunc() {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i]._fireBeforeWriteFunc();
        }
        const writeFunctions = this._wrFn;
        if (this._wrFn) {
            for (let i = 0; i < writeFunctions.length; i++) {
                // ******** DOM WRITE ****************
                writeFunctions[i]();
            }
        }
    }
    /**
     * @hidden
     * DOM WRITE
     */
    _setAfterStyles() {
        let i, j;
        let ele;
        let eleClassList;
        let elements = this._e;
        for (i = 0; i < this._eL; i++) {
            ele = elements[i];
            eleClassList = ele.classList;
            // remove the transition duration/easing
            // ******** DOM WRITE ****************
            ele.style[this.plt.Css.transitionDuration] = ele.style[this.plt.Css.transitionTimingFn] = '';
            if (this._rv) {
                // finished in reverse direction
                // css classes that were added before the animation should be removed
                if (this._bfAdd) {
                    for (j = 0; j < this._bfAdd.length; j++) {
                        // ******** DOM WRITE ****************
                        eleClassList.remove(this._bfAdd[j]);
                    }
                }
                // css classes that were removed before the animation should be added
                if (this._bfRm) {
                    for (j = 0; j < this._bfRm.length; j++) {
                        // ******** DOM WRITE ****************
                        eleClassList.add(this._bfRm[j]);
                    }
                }
                // inline styles that were added before the animation should be removed
                if (this._bfSty) {
                    for (const prop in this._bfSty) {
                        // ******** DOM WRITE ****************
                        ele.style[prop] = '';
                    }
                }
            }
            else {
                // finished in forward direction
                // css classes to add after the animation
                if (this._afAdd) {
                    for (j = 0; j < this._afAdd.length; j++) {
                        // ******** DOM WRITE ****************
                        eleClassList.add(this._afAdd[j]);
                    }
                }
                // css classes to remove after the animation
                if (this._afRm) {
                    for (j = 0; j < this._afRm.length; j++) {
                        // ******** DOM WRITE ****************
                        eleClassList.remove(this._afRm[j]);
                    }
                }
                // inline styles to add after the animation
                if (this._afSty) {
                    for (const prop in this._afSty) {
                        // ******** DOM WRITE ****************
                        ele.style[prop] = this._afSty[prop];
                    }
                }
            }
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * NO RECURSION
     */
    _willChg(addWillChange) {
        let wc;
        let effects = this._fx;
        let willChange;
        if (addWillChange && effects) {
            wc = [];
            for (let i = 0; i < effects.length; i++) {
                const propWC = effects[i].wc;
                if (propWC === 'webkitTransform') {
                    wc.push('transform', '-webkit-transform');
                }
                else {
                    wc.push(propWC);
                }
            }
            willChange = wc.join(',');
        }
        else {
            willChange = '';
        }
        for (let i = 0; i < this._eL; i++) {
            // ******** DOM WRITE ****************
            this._e[i].style.willChange = willChange;
        }
    }
    /**
     * Start the animation with a user controlled progress.
     */
    progressStart() {
        // ensure all past transition end events have been cleared
        this._clearAsync();
        // ******** DOM READ/WRITE ****************
        this._beforeAnimation();
        // ******** DOM WRITE ****************
        this._progressStart();
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _progressStart() {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i]._progressStart();
        }
        // force no duration, linear easing
        // ******** DOM WRITE ****************
        this._setTrans(0, true);
        // ******** DOM WRITE ****************
        this._willChg(true);
    }
    /**
     * Set the progress step for this animation.
     * progressStep() is not debounced, so it should not be called faster than 60FPS.
     */
    progressStep(stepValue) {
        // only update if the last update was more than 16ms ago
        stepValue = Math.min(1, Math.max(0, stepValue));
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i].progressStep(stepValue);
        }
        if (this._rv) {
            // if the animation is going in reverse then
            // flip the step value: 0 becomes 1, 1 becomes 0
            stepValue = ((stepValue * -1) + 1);
        }
        // ******** DOM WRITE ****************
        this._progress(stepValue);
    }
    /**
     * End the progress animation.
     */
    progressEnd(shouldComplete, currentStepValue, dur = -1) {
        (void 0) /* console.debug */;
        if (this._rv) {
            // if the animation is going in reverse then
            // flip the step value: 0 becomes 1, 1 becomes 0
            currentStepValue = ((currentStepValue * -1) + 1);
        }
        const stepValue = shouldComplete ? 1 : 0;
        const diff = Math.abs(currentStepValue - stepValue);
        if (diff < 0.05) {
            dur = 0;
        }
        else if (dur < 0) {
            dur = this._dur;
        }
        this._isAsync = (dur > 30);
        this._progressEnd(shouldComplete, stepValue, dur, this._isAsync);
        if (this._isAsync) {
            // for the root animation only
            // set the async TRANSITION END event
            // and run onFinishes when the transition ends
            // ******** DOM WRITE ****************
            this._asyncEnd(dur, shouldComplete);
            // this animation has a duration so we need another RAF
            // for the CSS TRANSITION properties to kick in
            this.plt && this.plt.raf(this._playToStep.bind(this, stepValue));
        }
    }
    /**
     * @hidden
     * DOM WRITE
     * RECURSION
     */
    _progressEnd(shouldComplete, stepValue, dur, isAsync) {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            // ******** DOM WRITE ****************
            children[i]._progressEnd(shouldComplete, stepValue, dur, isAsync);
        }
        if (!isAsync) {
            // stop immediately
            // set all the animations to their final position
            // ******** DOM WRITE ****************
            this._progress(stepValue);
            this._willChg(false);
            this._setAfterStyles();
            this._didFinish(shouldComplete);
        }
        else {
            // animate it back to it's ending position
            this.isPlaying = true;
            this.hasCompleted = false;
            this._hasDur = true;
            // ******** DOM WRITE ****************
            this._willChg(true);
            this._setTrans(dur, false);
        }
    }
    /**
     * Add a callback to fire when the animation has finished.
     */
    onFinish(callback, onceTimeCallback = false, clearOnFinishCallacks = false) {
        if (clearOnFinishCallacks) {
            this._fFn = this._fOneFn = undefined;
        }
        if (onceTimeCallback) {
            this._fOneFn = this._fOneFn || [];
            this._fOneFn.push(callback);
        }
        else {
            this._fFn = this._fFn || [];
            this._fFn.push(callback);
        }
        return this;
    }
    /**
     * @hidden
     * NO DOM
     * RECURSION
     */
    _didFinishAll(hasCompleted, finishAsyncAnimations, finishNoDurationAnimations) {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            children[i]._didFinishAll(hasCompleted, finishAsyncAnimations, finishNoDurationAnimations);
        }
        if (finishAsyncAnimations && this._isAsync || finishNoDurationAnimations && !this._isAsync) {
            this._didFinish(hasCompleted);
        }
    }
    /**
     * @hidden
     * NO RECURSION
     */
    _didFinish(hasCompleted) {
        this.isPlaying = false;
        this.hasCompleted = hasCompleted;
        if (this._fFn) {
            // run all finish callbacks
            for (let i = 0; i < this._fFn.length; i++) {
                this._fFn[i](this);
            }
        }
        if (this._fOneFn) {
            // run all "onetime" finish callbacks
            for (let i = 0; i < this._fOneFn.length; i++) {
                this._fOneFn[i](this);
            }
            this._fOneFn.length = 0;
        }
    }
    /**
     * Reverse the animation.
     */
    reverse(shouldReverse = true) {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            children[i].reverse(shouldReverse);
        }
        this._rv = shouldReverse;
        return this;
    }
    /**
     * Recursively destroy this animation and all child animations.
     */
    destroy() {
        const children = this._c;
        for (let i = 0; i < this._cL; i++) {
            children[i].destroy();
        }
        this._clearAsync();
        this.parent = this.plt = this._e = this._rdFn = this._wrFn = null;
        if (this._c) {
            this._c.length = this._cL = 0;
        }
        if (this._fFn) {
            this._fFn.length = 0;
        }
        if (this._fOneFn) {
            this._fOneFn.length = 0;
        }
    }
    /**
     * @hidden
     * NO DOM
     */
    _transEl() {
        // get the lowest level element that has an Animation
        let targetEl;
        for (let i = 0; i < this._cL; i++) {
            targetEl = this._c[i]._transEl();
            if (targetEl) {
                return targetEl;
            }
        }
        return (this._twn && this._hasDur && this._eL ? this._e[0] : null);
    }
}
const ANIMATION_TRANSFORMS = {
    'translateX': 1,
    'translateY': 1,
    'translateZ': 1,
    'scale': 1,
    'scaleX': 1,
    'scaleY': 1,
    'scaleZ': 1,
    'rotate': 1,
    'rotateX': 1,
    'rotateY': 1,
    'rotateZ': 1,
    'skewX': 1,
    'skewY': 1,
    'perspective': 1
};
const ANIMATION_CSS_VALUE_REGEX = /(^-?\d*\.?\d*)(.*)/;
const ANIMATION_DURATION_MIN = 32;
const ANIMATION_TRANSITION_END_FALLBACK_PADDING_MS = 400;
//# sourceMappingURL=animation.js.map