"use strict";

const NoChange = require("astformer/actions/no-change"); // FIXME

module.exports = {
	name: "desugar-interpolation-expressions",
	visitors: {
		NixAttributePath: (node) => {
			if (node.attr.length === 1 && node.attr[0].type === "NixInterpolationExpression") {
				// Special case: something like `{ ${foo} = "bar"; }` where the interpolation is expressed without surrounding string literal syntax
				return {
					... node,
					// TODO: Move construction to _nixTypes
					attr: [
						{ type: "NixStringLiteral", parts: [
							{ type: "NixInterpolationLiteral", value: "" },
							node.attr[0],
							{ type: "NixInterpolationLiteral", value: "" },
						] },
					]
				};
			} else {
				return NoChange;
			}
		}
	}
};