import { prisma } from '../prisma.js';
import { DEFAULTS } from '$lib/utils/constants.js';

/**
 * Check whether the onboarding wizard should be shown.
 * Returns true if no users exist OR SystemSettings.onboardingComplete is false.
 */
export async function isOnboardingNeeded(): Promise<boolean> {
	const userCount = await prisma.user.count();
	if (userCount === 0) {
		return true;
	}

	try {
		const settings = await prisma.systemSettings.findUnique({
			where: { id: DEFAULTS.SYSTEM_SETTINGS_ID },
			select: { onboardingComplete: true }
		});

		// If no settings record exists yet, onboarding is needed
		if (!settings) {
			return true;
		}

		return !settings.onboardingComplete;
	} catch {
		// If SystemSettings table doesn't exist yet, onboarding is needed
		return true;
	}
}

/**
 * Mark onboarding as complete in SystemSettings.
 */
export async function completeOnboarding(): Promise<void> {
	await prisma.systemSettings.upsert({
		where: { id: DEFAULTS.SYSTEM_SETTINGS_ID },
		update: { onboardingComplete: true },
		create: {
			id: DEFAULTS.SYSTEM_SETTINGS_ID,
			onboardingComplete: true
		}
	});
}

/**
 * Get the current onboarding status.
 */
export async function getOnboardingStatus(): Promise<{
	readonly needed: boolean;
	readonly hasUsers: boolean;
	readonly onboardingComplete: boolean;
}> {
	const userCount = await prisma.user.count();
	const hasUsers = userCount > 0;

	let onboardingComplete = false;
	try {
		const settings = await prisma.systemSettings.findUnique({
			where: { id: DEFAULTS.SYSTEM_SETTINGS_ID },
			select: { onboardingComplete: true }
		});
		onboardingComplete = settings?.onboardingComplete ?? false;
	} catch {
		onboardingComplete = false;
	}

	return {
		needed: !hasUsers || !onboardingComplete,
		hasUsers,
		onboardingComplete
	};
}