import canUseDom from './canUseDom';

export const canUseDocElement = () => canUseDom() && window.document.documentElement;

const isStyleNameSupport = (styleName) => {
    if (canUseDom() && window.document.documentElement) {
        const styleNameList = Array.isArray(styleName) ? styleName : [styleName];
        const { documentElement } = window.document;

        return styleNameList.some(name => name in documentElement.style);
    }
    return false;
};

const isStyleValueSupport = (styleName, value) => {
    if (!isStyleNameSupport(styleName)) {
        return false;
    }

    const ele = document.createElement('div');
    const origin = ele.style[styleName];
    ele.style[styleName] = value;
    return ele.style[styleName] !== origin;
};

export function isStyleSupport(styleName, styleValue) {
    if (!Array.isArray(styleName) && styleValue !== undefined) {
        return isStyleValueSupport(styleName, styleValue);
    }

    return isStyleNameSupport(styleName);
}

let flexGapSupported;
export const detectFlexGapSupported = () => {
    if (!canUseDocElement()) {
        return false;
    }

    if (flexGapSupported !== undefined) {
        return flexGapSupported;
    }

    // create flex container with row-gap set
    const flex = document.createElement('div');
    flex.style.display = 'flex';
    flex.style.flexDirection = 'column';
    flex.style.rowGap = '1px';

    // create two, elements inside it
    flex.appendChild(document.createElement('div'));
    flex.appendChild(document.createElement('div'));

    // append to the DOM (needed to obtain scrollHeight)
    document.body.appendChild(flex);
    flexGapSupported = flex.scrollHeight === 1; // flex container should be 1px high from the row-gap
    document.body.removeChild(flex);

    return flexGapSupported;
};

export default isStyleSupport;
