import type { PageServerLoad, Actions } from "./$types";

import { fail } from '@sveltejs/kit';

import { MONTHS, toInt, toFloat } from "$lib/util";

import { getEstimateFiles } from "$lib/server/docstore";

export const load: PageServerLoad = async ({ locals }) => {
	
	let estimates = locals.user.get_estimates();
	let documents = await getEstimateFiles(locals.user);

	let estimates_grouped = Map.groupBy(estimates, (v) => v.year);
	estimates_grouped.forEach((value, key, map) => {

		let quarters = Map.groupBy(value, (v) => v.quarter)
		quarters.forEach((_value, _key, _map) => {
			let months = _value.map((v) => [ 
				{ month: MONTHS[(v.quarter - 1) * 3 + 2], estimate: v.estimate_2 },
				{ month: MONTHS[(v.quarter - 1) * 3 + 1], estimate: v.estimate_1 },
				{ month: MONTHS[(v.quarter - 1) * 3 + 0], estimate: v.estimate_0 },
			] ).flat();
			
			_map.set(_key, months);
		})
		map.set(key, quarters);
	})

	let documents_grouped = Map.groupBy(documents, (v) => toInt(v.identifier.slice(0, 4)))
	documents_grouped.forEach((value, key, map) => {
		let quarters = Map.groupBy(value, (v) => toInt(v.identifier.slice(5, 7)));
		map.set(key, quarters);
	})

	return {
		estimates: estimates_grouped,
		documents: documents_grouped,
	};
}

export const actions = {
	add_quarter: async ({ locals, request }) => {
		
		const data = await request.formData();

		const year = data.get("year");
		const quart = data.get("quarter");
		const estimate_0 = data.get("estimate_0");
		const estimate_1 = data.get("estimate_1");
		const estimate_2 = data.get("estimate_2");
		
		if (year == null || quart == null || estimate_0 == null || estimate_1 == null || estimate_2 == null) {
			return fail(400, { year: year, quarter: quart, estimate_0: estimate_0, estimate_1: estimate_1, estimate_2: estimate_2 });
		}
		
		const y = toInt(year);
		const q = toInt(quart);
		const est_0 = toFloat(estimate_0);
		const est_1 = toFloat(estimate_1);
		const est_2 = toFloat(estimate_2);

		if (isNaN(y) || isNaN(q) || q < 1 || q > 4 || isNaN(est_0) || isNaN(est_1) || isNaN(est_2)) {
			return fail(400, { year: year, quarter: quart, estimate_0: estimate_0, estimate_1: estimate_1, estimate_2: estimate_2 });
		}

		if (locals.user.get_estimate(y, q)) {
			return fail(409, { reason: "Estimate already exists" } );
		}

		return { success: true };

		const res = locals.user.insert_estimate(y, q, est_0, est_1, est_2)

		if (!res) {
			return fail(500, {});
		}

		return { success: true };
	}
} satisfies Actions;