import assert from 'node:assert/strict';
import { afterEach, describe, it } from 'node:test';
import { loadConfig } from '../src/config.ts';

const SAVED = { ...process.env };
afterEach(() => {
	process.env = { ...SAVED };
});

describe('loadConfig', () => {
	it('requires the instance URL and token', () => {
		delete process.env.TSC_URL;
		process.env.TSC_JWT_COOKIE = 'x';
		assert.throws(() => loadConfig(), /TSC_URL/);
	});

	it('strips trailing slashes so paths concatenate cleanly', () => {
		process.env.TSC_URL = 'https://example.org///';
		process.env.TSC_JWT_COOKIE = 'x';
		assert.equal(loadConfig().baseUrl, 'https://example.org');
	});

	it('rejects a non-numeric port rather than silently defaulting', () => {
		process.env.TSC_URL = 'https://example.org';
		process.env.TSC_JWT_COOKIE = 'x';
		process.env.PORT = 'not-a-number';
		assert.throws(() => loadConfig(), /PORT/);
	});

	it('treats a blank auth token as absent', () => {
		process.env.TSC_URL = 'https://example.org';
		process.env.TSC_JWT_COOKIE = 'x';
		process.env.MCP_AUTH_TOKEN = '   ';
		assert.equal(loadConfig().authToken, undefined);
	});
});

describe('loadConfig: state directory', () => {
	it('resolves the state directory to an absolute path', () => {
		process.env.TSC_URL = 'https://example.org';
		process.env.TSC_JWT_COOKIE = 'x';
		process.env.STATE_DIR = 'tmp/state';
		assert.match(loadConfig().stateDir ?? '', /^\/.*\/tmp\/state$/);
	});
});