import { redirect } from '@sveltejs/kit';
import { createApiClient } from '$lib/api.server';

export async function load({ url, fetch }) {
    const q = url.searchParams.get('q') || '';
    const from = url.searchParams.get('from') || '';
    const to = url.searchParams.get('to') || '';
    const senderId = url.searchParams.get('senderId') || '';
    const receiverId = url.searchParams.get('receiverId') || '';
    const tags = url.searchParams.getAll('tag');

    const api = createApiClient(fetch);

    try {
        const [docsResult, personsResult] = await Promise.all([
            api.GET('/api/documents/search', {
                params: {
                    query: {
                        q: q || undefined,
                        from: from || undefined,
                        to: to || undefined,
                        senderId: senderId || undefined,
                        receiverId: receiverId || undefined,
                        tag: tags.length ? tags : undefined
                    }
                }
            }),
            api.GET('/api/persons')
        ]);

        if (docsResult.response.status === 401 || personsResult.response.status === 401) {
            throw redirect(302, '/login');
        }

        const documents = docsResult.data ?? [];
        const allPersons: { id: string; firstName: string; lastName: string }[] = personsResult.data ?? [];

        const senderObj = allPersons.find(p => p.id === senderId);
        const receiverObj = allPersons.find(p => p.id === receiverId);

        return {
            documents,
            initialValues: {
                senderName: senderObj ? `${senderObj.firstName} ${senderObj.lastName}` : '',
                receiverName: receiverObj ? `${receiverObj.firstName} ${receiverObj.lastName}` : ''
            },
            filters: { q, from, to, senderId, receiverId, tags },
            error: null as string | null
        };
    } catch (e) {
        if ((e as { status?: number }).status) throw e;
        console.error('Error loading data:', e);
        return {
            documents: [],
            initialValues: { senderName: '', receiverName: '' },
            filters: { q, from, to, senderId, receiverId, tags },
            error: 'Daten konnten nicht geladen werden.' as string | null
        };
    }
}