var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
// playground: stackblitz.com/edit/countup-typescript
var CountUp = /** @class */ (function () {
    function CountUp(target, endVal, options) {
        var _this = this;
        this.endVal = endVal;
        this.options = options;
        this.version = '2.6.0';
        this.defaults = {
            startVal: 0,
            decimalPlaces: 0,
            duration: 2,
            useEasing: true,
            useGrouping: true,
            useIndianSeparators: false,
            smartEasingThreshold: 999,
            smartEasingAmount: 333,
            separator: ',',
            decimal: '.',
            prefix: '',
            suffix: '',
            enableScrollSpy: false,
            scrollSpyDelay: 200,
            scrollSpyOnce: false,
        };
        this.finalEndVal = null; // for smart easing
        this.useEasing = true;
        this.countDown = false;
        this.error = '';
        this.startVal = 0;
        this.paused = true;
        this.once = false;
        this.count = function (timestamp) {
            if (!_this.startTime) {
                _this.startTime = timestamp;
            }
            var progress = timestamp - _this.startTime;
            _this.remaining = _this.duration - progress;
            // to ease or not to ease
            if (_this.useEasing) {
                if (_this.countDown) {
                    _this.frameVal = _this.startVal - _this.easingFn(progress, 0, _this.startVal - _this.endVal, _this.duration);
                }
                else {
                    _this.frameVal = _this.easingFn(progress, _this.startVal, _this.endVal - _this.startVal, _this.duration);
                }
            }
            else {
                _this.frameVal = _this.startVal + (_this.endVal - _this.startVal) * (progress / _this.duration);
            }
            // don't go past endVal since progress can exceed duration in the last frame
            var wentPast = _this.countDown ? _this.frameVal < _this.endVal : _this.frameVal > _this.endVal;
            _this.frameVal = wentPast ? _this.endVal : _this.frameVal;
            // decimal
            _this.frameVal = Number(_this.frameVal.toFixed(_this.options.decimalPlaces));
            // format and print value
            _this.printValue(_this.frameVal);
            // whether to continue
            if (progress < _this.duration) {
                _this.rAF = requestAnimationFrame(_this.count);
            }
            else if (_this.finalEndVal !== null) {
                // smart easing
                _this.update(_this.finalEndVal);
            }
            else {
                if (_this.options.onCompleteCallback) {
                    _this.options.onCompleteCallback();
                }
            }
        };
        // default format and easing functions
        this.formatNumber = function (num) {
            var neg = (num < 0) ? '-' : '';
            var result, x1, x2, x3;
            result = Math.abs(num).toFixed(_this.options.decimalPlaces);
            result += '';
            var x = result.split('.');
            x1 = x[0];
            x2 = x.length > 1 ? _this.options.decimal + x[1] : '';
            if (_this.options.useGrouping) {
                x3 = '';
                var factor = 3, j = 0;
                for (var i = 0, len = x1.length; i < len; ++i) {
                    if (_this.options.useIndianSeparators && i === 4) {
                        factor = 2;
                        j = 1;
                    }
                    if (i !== 0 && (j % factor) === 0) {
                        x3 = _this.options.separator + x3;
                    }
                    j++;
                    x3 = x1[len - i - 1] + x3;
                }
                x1 = x3;
            }
            // optional numeral substitution
            if (_this.options.numerals && _this.options.numerals.length) {
                x1 = x1.replace(/[0-9]/g, function (w) { return _this.options.numerals[+w]; });
                x2 = x2.replace(/[0-9]/g, function (w) { return _this.options.numerals[+w]; });
            }
            return neg + _this.options.prefix + x1 + x2 + _this.options.suffix;
        };
        // t: current time, b: beginning value, c: change in value, d: duration
        this.easeOutExpo = function (t, b, c, d) {
            return c * (-Math.pow(2, -10 * t / d) + 1) * 1024 / 1023 + b;
        };
        this.options = __assign(__assign({}, this.defaults), options);
        this.formattingFn = (this.options.formattingFn) ?
            this.options.formattingFn : this.formatNumber;
        this.easingFn = (this.options.easingFn) ?
            this.options.easingFn : this.easeOutExpo;
        this.startVal = this.validateValue(this.options.startVal);
        this.frameVal = this.startVal;
        this.endVal = this.validateValue(endVal);
        this.options.decimalPlaces = Math.max(0 || this.options.decimalPlaces);
        this.resetDuration();
        this.options.separator = String(this.options.separator);
        this.useEasing = this.options.useEasing;
        if (this.options.separator === '') {
            this.options.useGrouping = false;
        }
        this.el = (typeof target === 'string') ? document.getElementById(target) : target;
        if (this.el) {
            this.printValue(this.startVal);
        }
        else {
            this.error = '[CountUp] target is null or undefined';
        }
        // scroll spy
        if (typeof window !== 'undefined' && this.options.enableScrollSpy) {
            if (!this.error) {
                // set up global array of onscroll functions to handle multiple instances
                window['onScrollFns'] = window['onScrollFns'] || [];
                window['onScrollFns'].push(function () { return _this.handleScroll(_this); });
                window.onscroll = function () {
                    window['onScrollFns'].forEach(function (fn) { return fn(); });
                };
                this.handleScroll(this);
            }
            else {
                console.error(this.error, target);
            }
        }
    }
    CountUp.prototype.handleScroll = function (self) {
        if (!self || !window || self.once)
            return;
        var bottomOfScroll = window.innerHeight + window.scrollY;
        var rect = self.el.getBoundingClientRect();
        var topOfEl = rect.top + window.pageYOffset;
        var bottomOfEl = rect.top + rect.height + window.pageYOffset;
        if (bottomOfEl < bottomOfScroll && bottomOfEl > window.scrollY && self.paused) {
            // in view
            self.paused = false;
            setTimeout(function () { return self.start(); }, self.options.scrollSpyDelay);
            if (self.options.scrollSpyOnce)
                self.once = true;
        }
        else if ((window.scrollY > bottomOfEl || topOfEl > bottomOfScroll) &&
            !self.paused) {
            // out of view
            self.reset();
        }
    };
    /**
     * Smart easing works by breaking the animation into 2 parts, the second part being the
     * smartEasingAmount and first part being the total amount minus the smartEasingAmount. It works
     * by disabling easing for the first part and enabling it on the second part. It is used if
     * usingEasing is true and the total animation amount exceeds the smartEasingThreshold.
     */
    CountUp.prototype.determineDirectionAndSmartEasing = function () {
        var end = (this.finalEndVal) ? this.finalEndVal : this.endVal;
        this.countDown = (this.startVal > end);
        var animateAmount = end - this.startVal;
        if (Math.abs(animateAmount) > this.options.smartEasingThreshold && this.options.useEasing) {
            this.finalEndVal = end;
            var up = (this.countDown) ? 1 : -1;
            this.endVal = end + (up * this.options.smartEasingAmount);
            this.duration = this.duration / 2;
        }
        else {
            this.endVal = end;
            this.finalEndVal = null;
        }
        if (this.finalEndVal !== null) {
            // setting finalEndVal indicates smart easing
            this.useEasing = false;
        }
        else {
            this.useEasing = this.options.useEasing;
        }
    };
    // start animation
    CountUp.prototype.start = function (callback) {
        if (this.error) {
            return;
        }
        if (callback) {
            this.options.onCompleteCallback = callback;
        }
        if (this.duration > 0) {
            this.determineDirectionAndSmartEasing();
            this.paused = false;
            this.rAF = requestAnimationFrame(this.count);
        }
        else {
            this.printValue(this.endVal);
        }
    };
    // pause/resume animation
    CountUp.prototype.pauseResume = function () {
        if (!this.paused) {
            cancelAnimationFrame(this.rAF);
        }
        else {
            this.startTime = null;
            this.duration = this.remaining;
            this.startVal = this.frameVal;
            this.determineDirectionAndSmartEasing();
            this.rAF = requestAnimationFrame(this.count);
        }
        this.paused = !this.paused;
    };
    // reset to startVal so animation can be run again
    CountUp.prototype.reset = function () {
        cancelAnimationFrame(this.rAF);
        this.paused = true;
        this.resetDuration();
        this.startVal = this.validateValue(this.options.startVal);
        this.frameVal = this.startVal;
        this.printValue(this.startVal);
    };
    // pass a new endVal and start animation
    CountUp.prototype.update = function (newEndVal) {
        cancelAnimationFrame(this.rAF);
        this.startTime = null;
        this.endVal = this.validateValue(newEndVal);
        if (this.endVal === this.frameVal) {
            return;
        }
        this.startVal = this.frameVal;
        if (this.finalEndVal == null) {
            this.resetDuration();
        }
        this.finalEndVal = null;
        this.determineDirectionAndSmartEasing();
        this.rAF = requestAnimationFrame(this.count);
    };
    CountUp.prototype.printValue = function (val) {
        var _a;
        if (!this.el)
            return;
        var result = this.formattingFn(val);
        if ((_a = this.options.plugin) === null || _a === void 0 ? void 0 : _a.render) {
            this.options.plugin.render(this.el, result);
            return;
        }
        if (this.el.tagName === 'INPUT') {
            var input = this.el;
            input.value = result;
        }
        else if (this.el.tagName === 'text' || this.el.tagName === 'tspan') {
            this.el.textContent = result;
        }
        else {
            this.el.innerHTML = result;
        }
    };
    CountUp.prototype.ensureNumber = function (n) {
        return (typeof n === 'number' && !isNaN(n));
    };
    CountUp.prototype.validateValue = function (value) {
        var newValue = Number(value);
        if (!this.ensureNumber(newValue)) {
            this.error = "[CountUp] invalid start or end value: ".concat(value);
            return null;
        }
        else {
            return newValue;
        }
    };
    CountUp.prototype.resetDuration = function () {
        this.startTime = null;
        this.duration = Number(this.options.duration) * 1000;
        this.remaining = this.duration;
    };
    return CountUp;
}());
export { CountUp };