/**
 * registry.test.ts — unit tests for the check registry.
 */
import { describe, expect, it, beforeEach } from "bun:test";
import {
	clearChecks,
	getAllChecks,
	getCheck,
	registerCheck,
	type CheckDefinition,
} from "../src/checks/registry.js";

function stubCheck(name: string): CheckDefinition {
	return {
		name,
		label: name,
		description: `${name} check`,
		agentName: "scanner",
		phaseId: "scan",
		buildScanTask: () => "scan",
		buildFixTask: () => "fix",
		gate: () => undefined,
	};
}

describe("check registry", () => {
	beforeEach(() => clearChecks());

	it("registerCheck inserts and getAllChecks returns it", () => {
		registerCheck(stubCheck("comments"));
		const all = getAllChecks();
		expect(all).toHaveLength(1);
		expect(all[0]?.name).toBe("comments");
	});

	it("getCheck looks up by name", () => {
		registerCheck(stubCheck("complexity"));
		expect(getCheck("complexity")?.label).toBe("complexity");
		expect(getCheck("missing")).toBeUndefined();
	});

	it("registerCheck throws on duplicate names", () => {
		registerCheck(stubCheck("dup"));
		expect(() => registerCheck(stubCheck("dup"))).toThrow(/Duplicate/);
	});

	it("registerCheck throws on invalid names", () => {
		expect(() => registerCheck(stubCheck("Bad-Name"))).toThrow(/Invalid/);
		expect(() => registerCheck(stubCheck("with space"))).toThrow(/Invalid/);
		expect(() => registerCheck(stubCheck(""))).toThrow(/Invalid/);
	});

	it("clearChecks empties the registry", () => {
		registerCheck(stubCheck("a"));
		clearChecks();
		expect(getAllChecks()).toHaveLength(0);
	});

	it("preserves insertion order", () => {
		registerCheck(stubCheck("alpha"));
		registerCheck(stubCheck("beta"));
		registerCheck(stubCheck("gamma"));
		expect(getAllChecks().map((c) => c.name)).toEqual([
			"alpha",
			"beta",
			"gamma",
		]);
	});
});