import { afterEach, beforeEach, describe, expect, it } from "vitest";
import {
	resolveConfigValue,
	resolveConfigValueOrThrow,
	resolveConfigValueUncached,
} from "../src/core/resolve-config-value.js";

const VAR = "PRIME_AGENT_TEST_CREDENTIAL_VAR";

describe("resolveConfigValue env fallback", () => {
	beforeEach(() => {
		delete process.env[VAR];
	});
	afterEach(() => {
		delete process.env[VAR];
	});

	it("uses the env var value when set", () => {
		process.env[VAR] = "secret-value";
		expect(resolveConfigValue(VAR)).toBe("secret-value");
		expect(resolveConfigValueUncached(VAR)).toBe("secret-value");
	});

	it("falls back to the literal string when the env var is unset", () => {
		expect(resolveConfigValue(VAR)).toBe(VAR);
		expect(resolveConfigValue("sk-literal-key")).toBe("sk-literal-key");
	});

	it("treats a set-but-empty env var as a missing credential, not the literal name", () => {
		process.env[VAR] = "";
		expect(resolveConfigValue(VAR)).toBeUndefined();
		expect(resolveConfigValueUncached(VAR)).toBeUndefined();
		expect(() => resolveConfigValueOrThrow(VAR, "test credential")).toThrow("Failed to resolve test credential");
	});
});