import type { PageServerLoad, Actions } from './$types';
import { apiClient } from '$lib/server/api';
import { getWeekStart } from '$lib/planner/week';

export const load: PageServerLoad = async ({ fetch, url }) => {
	const weekParam = url.searchParams.get('week');
	const weekStart = weekParam ?? getWeekStart(new Date());

	const api = apiClient(fetch);
	const { data: weekPlan, error } = await api.GET('/v1/week-plans', {
		params: { query: { weekStart } }
	});

	if (error || !weekPlan?.id) {
		return { weekPlan: null, varietyScore: null, weekStart };
	}

	const { data: varietyScore } = await api.GET('/v1/week-plans/{id}/variety-score', {
		params: { path: { id: weekPlan.id } }
	});

	return {
		weekPlan,
		varietyScore: varietyScore ?? null,
		weekStart
	};
};

export const actions: Actions = {
	createPlan: async ({ fetch, request, locals }) => {
		// Role guard: only planners may create week plans
		if (locals.benutzer?.rolle !== 'planer') {
			return { success: false, error: 'Keine Berechtigung.' };
		}

		const formData = await request.formData();
		const weekStart = formData.get('weekStart') as string;

		// Validate weekStart format: must be YYYY-MM-DD
		if (!weekStart || !/^\d{4}-\d{2}-\d{2}$/.test(weekStart)) {
			return { success: false, error: 'Ungültiges Datum.' };
		}

		const api = apiClient(fetch);
		const { data, error } = await api.POST('/v1/week-plans', {
			body: { weekStart }
		});

		if (error || !data) {
			return { success: false, error: 'Plan konnte nicht erstellt werden.' };
		}

		return { success: true };
	}
};