/* Copyright IBM Corp. 2017 */
import { isString } from 'lodash';
import { isValidLayout } from './layout.utils';
import { WchTools } from './wchtools';

export function _getDefaultLayoutFromMapping(aLayoutMapping: any, aTools: WchTools): any {
    // check if we have a default
    const defaultLayout = aLayoutMapping.defaultLayout;
    if (isString(defaultLayout.id)) {
        // get the layout
        const layout = aTools.layouts[defaultLayout.id];
        if (isValidLayout(layout)) {
            // return this one
            return layout;
        }
    }
    // iterate over the remaining layouts
    const layouts: any[] = aLayoutMapping.layouts;
    const result = layouts.filter(layout => isString(layout.id)).map(layout => aTools.layouts[layout.id]).filter(isValidLayout);
    if (result && (result.length > 0)) {
        return result[0];
    }
    return undefined;
}

export function getDefaultLayout(aLayoutMapping: any, aTools: WchTools): any {
    // check the mappings
    const mappings = aLayoutMapping.mappings || [];
    const result = mappings.map((mapping: any) => _getDefaultLayoutFromMapping(mapping, aTools)).filter(Boolean);
    if (result && (result.length > 0)) {
        return result[0];
    }
    return undefined;
}