'use strict';

var keysPosition = require('../../render/utils/keys-position.js');
var dimensions = require('../../value/types/dimensions.js');
var cssVariablesConversion = require('../utils/css-variables-conversion.js');
var isCssVariable = require('../utils/is-css-variable.js');
var KeyframesResolver = require('./KeyframesResolver.js');
var isNone = require('./utils/is-none.js');
var makeNoneAnimatable = require('./utils/make-none-animatable.js');
var unitConversion = require('./utils/unit-conversion.js');

class DOMKeyframesResolver extends KeyframesResolver.KeyframeResolver {
    constructor(unresolvedKeyframes, onComplete, name, motionValue, element) {
        super(unresolvedKeyframes, onComplete, name, motionValue, element, true);
    }
    readKeyframes() {
        const { unresolvedKeyframes, element, name } = this;
        if (!element || !element.current)
            return;
        super.readKeyframes();
        /**
         * If any keyframe is a CSS variable, we need to find its value by sampling the element
         */
        for (let i = 0; i < unresolvedKeyframes.length; i++) {
            let keyframe = unresolvedKeyframes[i];
            if (typeof keyframe === "string") {
                keyframe = keyframe.trim();
                if (isCssVariable.isCSSVariableToken(keyframe)) {
                    const resolved = cssVariablesConversion.getVariableValue(keyframe, element.current);
                    if (resolved !== undefined) {
                        unresolvedKeyframes[i] = resolved;
                    }
                    if (i === unresolvedKeyframes.length - 1) {
                        this.finalKeyframe = keyframe;
                    }
                }
            }
        }
        /**
         * Resolve "none" values. We do this potentially twice - once before and once after measuring keyframes.
         * This could be seen as inefficient but it's a trade-off to avoid measurements in more situations, which
         * have a far bigger performance impact.
         */
        this.resolveNoneKeyframes();
        /**
         * Check to see if unit type has changed. If so schedule jobs that will
         * temporarily set styles to the destination keyframes.
         * Skip if we have more than two keyframes or this isn't a positional value.
         * TODO: We can throw if there are multiple keyframes and the value type changes.
         */
        if (!keysPosition.positionalKeys.has(name) || unresolvedKeyframes.length !== 2) {
            return;
        }
        const [origin, target] = unresolvedKeyframes;
        const originType = dimensions.findDimensionValueType(origin);
        const targetType = dimensions.findDimensionValueType(target);
        /**
         * If one keyframe contains embedded CSS variables (e.g. in calc()) and the other
         * doesn't, we need to measure to convert to pixels. This handles GitHub issue #3410.
         */
        const originHasVar = isCssVariable.containsCSSVariable(origin);
        const targetHasVar = isCssVariable.containsCSSVariable(target);
        if (originHasVar !== targetHasVar && unitConversion.positionalValues[name]) {
            this.needsMeasurement = true;
            return;
        }
        /**
         * Either we don't recognise these value types or we can animate between them.
         */
        if (originType === targetType)
            return;
        /**
         * If both values are numbers or pixels, we can animate between them by
         * converting them to numbers.
         */
        if (unitConversion.isNumOrPxType(originType) && unitConversion.isNumOrPxType(targetType)) {
            for (let i = 0; i < unresolvedKeyframes.length; i++) {
                const value = unresolvedKeyframes[i];
                if (typeof value === "string") {
                    unresolvedKeyframes[i] = parseFloat(value);
                }
            }
        }
        else if (unitConversion.positionalValues[name]) {
            /**
             * Else, the only way to resolve this is by measuring the element.
             */
            this.needsMeasurement = true;
        }
    }
    resolveNoneKeyframes() {
        const { unresolvedKeyframes, name } = this;
        const noneKeyframeIndexes = [];
        for (let i = 0; i < unresolvedKeyframes.length; i++) {
            if (unresolvedKeyframes[i] === null ||
                isNone.isNone(unresolvedKeyframes[i])) {
                noneKeyframeIndexes.push(i);
            }
        }
        if (noneKeyframeIndexes.length) {
            makeNoneAnimatable.makeNoneKeyframesAnimatable(unresolvedKeyframes, noneKeyframeIndexes, name);
        }
    }
    measureInitialState() {
        const { element, unresolvedKeyframes, name } = this;
        if (!element || !element.current)
            return;
        if (name === "height") {
            this.suspendedScrollY = window.pageYOffset;
        }
        this.measuredOrigin = unitConversion.positionalValues[name](element.measureViewportBox(), window.getComputedStyle(element.current));
        unresolvedKeyframes[0] = this.measuredOrigin;
        // Set final key frame to measure after next render
        const measureKeyframe = unresolvedKeyframes[unresolvedKeyframes.length - 1];
        if (measureKeyframe !== undefined) {
            element.getValue(name, measureKeyframe).jump(measureKeyframe, false);
        }
    }
    measureEndState() {
        const { element, name, unresolvedKeyframes } = this;
        if (!element || !element.current)
            return;
        const value = element.getValue(name);
        value && value.jump(this.measuredOrigin, false);
        const finalKeyframeIndex = unresolvedKeyframes.length - 1;
        const finalKeyframe = unresolvedKeyframes[finalKeyframeIndex];
        unresolvedKeyframes[finalKeyframeIndex] = unitConversion.positionalValues[name](element.measureViewportBox(), window.getComputedStyle(element.current));
        if (finalKeyframe !== null && this.finalKeyframe === undefined) {
            this.finalKeyframe = finalKeyframe;
        }
        // If we removed transform values, reapply them before the next render
        if (this.removedTransforms?.length) {
            this.removedTransforms.forEach(([unsetTransformName, unsetTransformValue]) => {
                element
                    .getValue(unsetTransformName)
                    .set(unsetTransformValue);
            });
        }
        this.resolveNoneKeyframes();
    }
}

exports.DOMKeyframesResolver = DOMKeyframesResolver;
