import { describe, test, expect, beforeEach, afterEach } from 'bun:test';
import { testDb } from '$lib/server/db/test';
import { dashboardSettings } from '$lib/server/db/schema';
import {
	getSettings,
	updateSettings,
	hashSettings,
	envSettings,
	settingsEnvVar
} from '$lib/server/stats/settings';
import { SETTINGS_DEFAULTS } from '$lib/types/stats';

async function clear() {
	await testDb.delete(dashboardSettings);
}

describe('stats settings', () => {
	beforeEach(clear);
	afterEach(clear);

	test('env var names map from keys', () => {
		expect(settingsEnvVar('d1_target')).toBe('STATS_D1_TARGET');
	});

	test('empty table returns built-in defaults', async () => {
		const settings = await getSettings(testDb);
		expect(settings).toEqual({ ...SETTINGS_DEFAULTS });
	});

	test('updateSettings upserts and is reflected on re-read', async () => {
		await updateSettings({ core_plays_per_week: 7 }, testDb);
		const settings = await getSettings(testDb);
		expect(settings.core_plays_per_week).toBe(7);
		// Updating again overwrites rather than duplicating.
		await updateSettings({ core_plays_per_week: 2 }, testDb);
		expect((await getSettings(testDb)).core_plays_per_week).toBe(2);
	});

	test('config hash is stable and changes with settings', () => {
		const a = hashSettings({ ...SETTINGS_DEFAULTS });
		const b = hashSettings({ ...SETTINGS_DEFAULTS });
		const c = hashSettings({ ...SETTINGS_DEFAULTS, d1_target: 99 });
		expect(a).toBe(b);
		expect(a).not.toBe(c);
		expect(a).toHaveLength(12);
	});

	test('envSettings falls back to defaults with no env overrides', () => {
		expect(envSettings()).toEqual({ ...SETTINGS_DEFAULTS });
	});
});