import { fail, redirect } from '@sveltejs/kit';
import { asc, desc, eq } from 'drizzle-orm';
import { randomUUID } from 'node:crypto';
import type { Actions, PageServerLoad } from './$types';
import { db } from '$lib/server/db';
import { galleryImages } from '$lib/server/db/schema';
import { saveImage, deleteUpload } from '$lib/server/storage';
import { SESSION_COOKIE, invalidateSession } from '$lib/server/auth';

function listImages() {
	return db
		.select()
		.from(galleryImages)
		.orderBy(asc(galleryImages.sortOrder), desc(galleryImages.createdAt))
		.all()
		.map((image) => ({
			id: image.id,
			url: `/uploads/${image.imagePath}`,
			caption: image.caption
		}));
}

export const load: PageServerLoad = () => {
	return { images: listImages() };
};

export const actions: Actions = {
	upload: async ({ request }) => {
		const form = await request.formData();
		const caption = String(form.get('caption') ?? '').trim() || null;
		const files = form
			.getAll('images')
			.filter((entry): entry is File => entry instanceof File && entry.size > 0);

		if (files.length === 0) {
			return fail(400, { error: 'Izberite vsaj eno sliko.' });
		}

		let count = 0;
		for (const file of files) {
			const imagePath = await saveImage('gallery', file);
			db.insert(galleryImages).values({ id: randomUUID(), imagePath, caption }).run();
			count++;
		}

		return { success: `Naloženih slik: ${count}.` };
	},

	delete: async ({ request }) => {
		const form = await request.formData();
		const id = String(form.get('id') ?? '');

		const row = db.select().from(galleryImages).where(eq(galleryImages.id, id)).get();
		if (row) {
			deleteUpload(row.imagePath);
			db.delete(galleryImages).where(eq(galleryImages.id, id)).run();
		}

		return { success: 'Slika izbrisana.' };
	},

	logout: async ({ cookies }) => {
		const token = cookies.get(SESSION_COOKIE);
		if (token) invalidateSession(token);
		cookies.delete(SESSION_COOKIE, { path: '/' });
		throw redirect(303, '/admin/login');
	}
};