import { NextRequest, NextResponse } from 'next/server';
import { db } from '@/lib/db';
import { settings } from '@/lib/db/schema';
import { eq } from 'drizzle-orm';
import { getSession } from '@/lib/session';

export async function GET(request: NextRequest) {
	try {
		const session = await getSession();
		if (!session || session.role !== 'admin') {
			return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
		}

		const allSettings = await db.select().from(settings);

		// Convert to key-value object for easier use
		const settingsObj = allSettings.reduce((acc: any, setting) => {
			acc[setting.key] = setting.value;
			return acc;
		}, {});

		return NextResponse.json({ settings: allSettings });
	} catch (error) {
		console.error('Error fetching settings:', error);
		return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
	}
}

export async function PUT(request: NextRequest) {
	try {
		const session = await getSession();
		if (!session || session.role !== 'admin') {
			return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
		}

		const { settings: newSettings } = await request.json();

		if (!newSettings || !Array.isArray(newSettings)) {
			return NextResponse.json(
				{ error: 'Invalid settings format. Expected array of {key, value} objects' },
				{ status: 400 }
			);
		}

		// Update each setting
		const updatePromises = newSettings.map(async ({ key, value }) => {
			if (!key || value === undefined) {
				return;
			}

			// Try to update existing setting first
			const result = await db
				.update(settings)
				.set({
					value: String(value),
					updatedAt: new Date(),
				})
				.where(eq(settings.key, key));

			// If no rows were updated, insert new setting
			if (!result.changes) {
				await db.insert(settings).values({
					id: crypto.randomUUID(),
					key,
					value: String(value),
					updatedAt: new Date(),
				});
			}
		});

		await Promise.all(updatePromises);

		return NextResponse.json({ message: 'Settings updated successfully' });
	} catch (error) {
		console.error('Error updating settings:', error);
		return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
	}
}