import type { Actions } from './$types';
import { error as kitError } from '@sveltejs/kit';
import Papa from 'papaparse';
import { fail } from '@sveltejs/kit';

export async function load({ locals }) {
    const { data: events, error } = await locals.supabase
        .from('events')
        .select('*')
        .order('date', { ascending: true });

    if (error) {
        console.error('❌ supabase error:', error);
        // optional: throw to render SvelteKit error page
        throw kitError(500, 'Could not load events');
    }

    return { events };
}

export const actions = {
    create: async (event) => {
        const formData = await event.request.formData();
        let { data: new_event, error } = await event.locals.supabase.rpc("create_event",
            {
                "p_name": formData.get('name'),
                "p_date": formData.get('date'),
                "p_description": formData.get('description'),
            });
        return {
            new_event,
            error
        }
    },
    participants: async (event) => {
        const formData = await event.request.formData();
        const file = formData.get('participants') as File;

        let csvText = await file.text();

        const { data: parsedRows, errors } = Papa.parse<string[]>(csvText, {
            skipEmptyLines: true,
            header: false
        });
        // Remove the first row (header)
        if (parsedRows.length > 0) {
            parsedRows.shift();
        }

        // Map each row to an object with keys: name, surname, email
        const participants = parsedRows.map((row: string[]) => ({
            name: row[0],
            surname: row[1],
            email: row[2]
        }));

        return {
            participants,
        }
    }
} satisfies Actions;