import { describe, it, expect, afterEach } from "vitest";
import {
	createBackend,
	getPassthroughBackend,
	clearBackendCache,
} from "../backends/registry.js";
import type { VaultConfig } from "../types.js";

const baseConfig: VaultConfig = {
	backend: "passthrough",
	managedProviders: "all",
};

afterEach(() => {
	clearBackendCache();
});

describe("Backend registry", () => {
	it("creates a passthrough backend", () => {
		const b = createBackend("passthrough", baseConfig);
		expect(b.name).toBe("passthrough");
	});

	it("creates an age backend", () => {
		const b = createBackend("age", { ...baseConfig, backend: "age" });
		expect(b.name).toBe("age");
	});

	it("creates a keychain backend", () => {
		const b = createBackend("keychain", { ...baseConfig, backend: "keychain" });
		expect(b.name).toBe("keychain");
	});

	it("caches instances by type", () => {
		const a = createBackend("passthrough", baseConfig);
		const b = createBackend("passthrough", baseConfig);
		expect(a).toBe(b);
	});

	it("returns fresh instances after clearBackendCache", () => {
		const a = createBackend("passthrough", baseConfig);
		clearBackendCache();
		const b = createBackend("passthrough", baseConfig);
		expect(a).not.toBe(b);
	});

	it("getPassthroughBackend returns a passthrough", () => {
		const b = getPassthroughBackend();
		expect(b.name).toBe("passthrough");
	});

	it("throws on unknown backend type", () => {
		expect(() =>
			createBackend("bogus" as never, { ...baseConfig, backend: "bogus" as never }),
		).toThrow("Unknown backend type");
	});
});