import { json, error } from '@sveltejs/kit';
import { createPbClient } from '$lib/server/pocketbase';
import { createServices, type ChatActor } from '$lib/server/services';
import type { RequestEvent } from '@sveltejs/kit';

type Body = {
	action: 'send' | 'typing';
	famId?: string;
	content?: string;
	clientId?: string;
	typing?: boolean;
};

export async function POST(event: RequestEvent) {
	const body = (await event.request.json().catch(() => null)) as Body | null;
	if (!body || !body.action) return json({ error: 'missing action' }, { status: 400 });

	const u = event.locals.user;
	if (!u || !event.locals.pbToken) throw error(401, 'Unauthorized');
	const pb = createPbClient(event.locals.pbToken);
	const actor: ChatActor = {
		id: u.id,
		type: u.role === 'parent' ? 'admin' : 'member',
		name: u.name,
		color: u.color || '#6366f1'
	};
	const famId = body.famId || u.famId || '';
	if (!famId) return json({ error: 'famId required' }, { status: 400 });

	try {
		const s = createServices(pb, { id: u.id, role: u.role });
		const data =
			body.action === 'typing'
				? await s.chat.typing(famId, actor, { typing: Boolean(body.typing) })
				: await s.chat.send(famId, actor, {
						content: body.content || '',
						clientId: body.clientId || '',
						siteUrl: event.url.origin
					});
		return json(data);
	} catch (e) {
		return json({ error: e instanceof Error ? e.message : 'chat request failed' }, { status: 400 });
	}
}