/**
 * @module
 */

/**
 * 
 * @param {Object} node 
 * @param {Object[]} flatList 
 * @param {Number} depth
 */
function traverse(node, flatList, depth = 1) {
    const normNode = {
        id: node.label,
        label: node.label,
        opacity: node.opacity ?? null,
        isMain: node.isMain ?? false,
        active: true,
    };
    if (node.model) {
       normNode.model = node.model; 
    }
    flatList.push({
        ...normNode,
        depth
    });
    if (node.children) {
        for(let child of node.children) {
            traverse(child, flatList, depth + 1);
        }
    }
}

/**
 * Create a flat list of nodes from
 * the nested structure in config
 * @param {Array} nodes
 * @returns {Object[]} A flat list of nodes
**/
export function normalizeNodes (nodes) {
    let flatList = [];

    for (let node of nodes) {
        traverse(node, flatList);
    }

    return flatList;
}