import { and, desc, eq } from 'drizzle-orm';
import { fail } from '@sveltejs/kit';
import { db } from '#lib/server/db/index.js';
import { osuEntries } from '#lib/server/db/schema/index.js';
import { allowedOsuUrl, boundedInteger, validDate } from '#lib/game-tracker/journal.js';
import type { Actions, PageServerLoad } from './$types';

export const load: PageServerLoad = async ({ locals }) => ({
	entries: locals.user
		? await db
				.select()
				.from(osuEntries)
				.where(eq(osuEntries.userId, locals.user.id))
				.orderBy(desc(osuEntries.playedOn), desc(osuEntries.id))
		: [],
	seo: {
		title: 'osu! training · Game Tracker',
		description:
			'A personal journal for memorable scores, beatmap goals and speed, stamina, aim and reading practice.'
	}
});
export const actions = {
	save: async ({ request, locals }) => {
		if (!locals.user) return fail(401, { message: 'Sign in to save training.' });
		const data = await request.formData();
		const t = (k: string) => String(data.get(k) ?? '').trim();
		const id = t('id') ? boundedInteger(data.get('id'), 1, 2147483647) : null;
		const kind = t('kind');
		const mode = t('mode');
		const goal = t('goal') || 'pass';
		const skill = t('skill') || 'stamina';
		if (
			(t('id') && !id) ||
			!['score', 'goal', 'training'].includes(kind) ||
			!['osu', 'taiko', 'fruits', 'mania'].includes(mode) ||
			!['pass', 'fc', 'accuracy', 'rank', 'custom'].includes(goal) ||
			!['stamina', 'speed', 'aim', 'reading', 'rhythm', 'finger-control', 'consistency'].includes(
				skill
			) ||
			!t('title') ||
			t('title').length > 250 ||
			t('notes').length > 5000 ||
			t('mods').length > 80 ||
			!validDate(t('playedOn'))
		)
			return fail(400, { message: 'Check the title, date and training details.' });
		if (!allowedOsuUrl(t('beatmapUrl'), 'beatmap') || !allowedOsuUrl(t('scoreUrl'), 'score'))
			return fail(400, { message: 'Use an https://osu.ppy.sh beatmap or score link.' });
		const optionalInt = (key: string, min: number, max: number) =>
			t(key) ? boundedInteger(data.get(key), min, max) : null;
		const bpm = optionalInt('bpm', 1, 2000),
			duration = optionalInt('duration', 1, 86400),
			combo = optionalInt('combo', 0, 1000000),
			misses = optionalInt('misses', 0, 1000000);
		const decimal = (key: string, min: number, max: number) =>
			!t(key) ||
			(/^\d+(\.\d{1,4})?$/.test(t(key)) && Number(t(key)) >= min && Number(t(key)) <= max);
		if (
			(t('bpm') && bpm === null) ||
			(t('duration') && duration === null) ||
			(t('combo') && combo === null) ||
			(t('misses') && misses === null) ||
			!decimal('accuracy', 0, 100) ||
			!decimal('pp', 0, 100000) ||
			!t('rate') ||
			!decimal('rate', 0.1, 4) ||
			(kind === 'training' && (!bpm || !duration))
		)
			return fail(400, {
				message:
					'Training needs BPM and duration. Check numeric fields, accuracy (0–100) and rate (0.1–4).'
			});
		const values = {
			userId: locals.user.id,
			kind: kind as 'score' | 'goal' | 'training',
			mode,
			goal,
			skill,
			title: t('title'),
			notes: t('notes'),
			bpm,
			duration,
			combo,
			misses,
			accuracy: t('accuracy') || null,
			pp: t('pp') || null,
			rate: t('rate'),
			mods: t('mods') || 'NM',
			beatmapUrl: t('beatmapUrl') || null,
			scoreUrl: t('scoreUrl') || null,
			playedOn: t('playedOn'),
			achieved: data.get('achieved') === 'on'
		};
		if (id) {
			const updated = await db
				.update(osuEntries)
				.set(values)
				.where(and(eq(osuEntries.id, id), eq(osuEntries.userId, locals.user.id)))
				.returning({ id: osuEntries.id });
			if (!updated.length) return fail(404, { message: 'Entry not found.' });
		} else await db.insert(osuEntries).values(values);
		return { saved: true };
	},
	toggleGoal: async ({ request, locals }) => {
		if (!locals.user) return fail(401, { message: 'Sign in to update goals.' });
		const data = await request.formData();
		const id = boundedInteger(data.get('id'), 1, 2147483647);
		if (!id) return fail(400, { message: 'Invalid goal.' });
		const updated = await db
			.update(osuEntries)
			.set({ achieved: data.get('achieved') === 'on' })
			.where(
				and(
					eq(osuEntries.id, id),
					eq(osuEntries.userId, locals.user.id),
					eq(osuEntries.kind, 'goal')
				)
			)
			.returning({ id: osuEntries.id });
		return updated.length ? { saved: true } : fail(404, { message: 'Goal not found.' });
	},
	delete: async ({ request, locals }) => {
		if (!locals.user) return fail(401, { message: 'Sign in to remove entries.' });
		const data = await request.formData();
		const id = boundedInteger(data.get('id'), 1, 2147483647);
		if (!id) return fail(400, { message: 'Invalid entry.' });
		const removed = await db
			.delete(osuEntries)
			.where(and(eq(osuEntries.id, id), eq(osuEntries.userId, locals.user.id)))
			.returning({ id: osuEntries.id });
		return removed.length ? { saved: true } : fail(404, { message: 'Entry not found.' });
	}
} satisfies Actions;