'use strict';

function shortDescription(astNode) {
    if (astNode.type === "FunctionDeclaration") {
        return `function ${shortDescription(astNode.id)}(${renderArguments(astNode.params)}) { ... }`;
    } else if (astNode.type === "ReturnStatement") {
        return `return ${shortDescription(astNode.argument)}`;
    } else if (astNode.type === "CallExpression") {
        return `${shortDescription(astNode.callee)}(${renderArguments(astNode.arguments)})`;
    } else if (astNode.type === "MemberExpression") {
        return `${shortDescription(astNode.object)}.${shortDescription(astNode.property)}`;
    } else if (astNode.type === "Identifier") {
        return `${astNode.name}`;
    } else if (astNode.type === "ArrowFunctionExpression") {
        return `(${renderArguments(astNode.params)}) => { ... }`;
    } else if (astNode.type === "Literal") {
        return astNode.raw;
    } else {
        return "";
    }
}

function renderArguments(args) {
    return args.map(arg => shortDescription(arg)).join(", ");
}

module.exports = shortDescription;