/**
 * enable or disable toolbar based on configuration
 *
 * @param value toolbar item
 * @param toolbar toolbar configuration object
 */
export function canEnableToolbarOptions(value: string, toolbar: any): boolean {

    if (value) {

        if (toolbar['length'] === 0) {
            return true;
        } else {

            const found = toolbar.filter(array => {
                return array.indexOf(value) !== -1;
            });

            return found.length ? true : false;
        }
    } else {
        return false;
    }
}

/**
 * set editor configuration
 *
 * @param value configuration via [config] property
 * @param ngxEditorConfig default editor configuration
 * @param input direct configuration inputs via directives
 */
export function getEditorConfiguration(value: any, ngxEditorConfig: any, input: any): any {

    for (const i in ngxEditorConfig) {
        if (i) {

            if (input[i] !== undefined) {
                value[i] = input[i];
            }

            if (!value.hasOwnProperty(i)) {
                value[i] = ngxEditorConfig[i];
            }
        }
    }

    return value;
}

/**
 * return vertical if the element is the resizer property is set to basic
 *
 * @param resizer type of resizer, either basic or stack
 */
export function canResize(resizer: string): any {
    if (resizer === 'basic') {
        return 'vertical';
    }
    return false;
}

/**
 * save selection when the editor is focussed out
 */
export function saveSelection(): any {
    if (window.getSelection) {
        const sel = window.getSelection();
        if (sel.getRangeAt && sel.rangeCount) {
            return sel.getRangeAt(0);
        }
    } else if (document.getSelection && document.createRange) {
        return document.createRange();
    }
    return null;
}

/**
 * restore selection when the editor is focussed in
 *
 * @param range saved selection when the editor is focussed out
 */
export function restoreSelection(range): boolean {
    if (range) {
        if (window.getSelection) {
            const sel = window.getSelection();
            sel.removeAllRanges();
            sel.addRange(range);
            return true;
        } else if (document.getSelection && range.select) {
            range.select();
            return true;
        }
    } else {
        return false;
    }
}