const SidingRefDimensions = Object.freeze({
    WIDTH: (DirectionUnitDependentAttribute) => DirectionUnitDependentAttribute._fFirst,
    HEIGHT: (DirectionUnitDependentAttribute) => DirectionUnitDependentAttribute._fSecond
})

/**
 * Simple Dimensions container for the height and width in pixels.
 */
class Dimensions extends DirectionUnitDependentAttribute {
    constructor(defaultValue = 0, defaultUnit = SizeUnits.PIXEL) {
        super();
        this._unit = defaultUnit;
        this._fFirst = defaultValue;
        this._fSecond = defaultValue;
    }

    /**
     * Sets width (x) value of amount
     * @param {number} amount 
     * @returns {Dimensions} this Dimensions Modifier
     */
    width(amount) {
        this._fFirst = amount;
        return this;
    }

    /**
     * Sets height (y) value of amount
     * @param {number} amount 
     * @returns {Dimensions} this Dimensions Modifier
     */
    height(amount) {
        this._fSecond = amount;
        return this;
    }


    getOrderedValues() {
        return this.getOrderedValues().slice(2)
    }

    getSidingRefValueMap() {
        return {
            [SidingRefDimensions.WIDTH]: this.getBySidingRef(SidingRefDimensions.WIDTH),
            [SidingRefDimensions.HEIGHT]: this.getBySidingRef(SidingRefDimensions.HEIGHT)
        }
    }
}


class DimensionsChain extends Dimensions {
    _modifier;
    constructor(modifier) {
        super();
        this._modifier = modifier;
    }

    /**
     * 
     * @returns {Modifier|ChainableModifier}
     */
    toModifier() {
        return this._modifier
            .dimensions(this);
    }

    /**
     * 
     * @returns {Modifier|ChainableModifier}
     */
    ensureModifier() {
        return this.toModifier()
    }
}

class ChainableDimensions extends DimensionsChain {
    toComponent() {
        return this._modifier
            .dimensions(this)
            .toComponent();
    }

    componentChild(innerComponent) {
        return this._modifier
            .dimensions(this)
            .toComponent()
            .componentChild(innerComponent);
    }

    componentChildren(innerComponent) {
        return this._modifier
            .dimensions(this)
            .toComponent()
            .componentChildren(innerComponent);
    }
}