import { db } from '$lib/server/db';
import { verseSubmissions, dailyVerses, user } from '$lib/server/db/schema';
import { eq, asc } from 'drizzle-orm';
import { getBookById } from '$lib/server/bible';
import { isAdmin } from '$lib/server/admin';
import type { PageServerLoad } from './$types';

export type ScheduledVerseRow = {
	scheduledDate: string;
	reference: string | null;
	verseText: string | null;
	bookId: string | null;
	bookName: string | null;
	selectedBookId: string;
	selectedChapter: number;
	selectedVerse: number;
	submittedAt: number; // server UTC millis
	submitterEmail: string | null;
	submitterName: string | null;
	submitterDeleted: boolean;
};

export const load: PageServerLoad = async ({ locals }) => {
	// Not authenticated → signal the client to show the sign-in flow
	// (same pattern as /progress, /stats).
	if (!locals.user) {
		return {
			rows: [] as ScheduledVerseRow[],
			requiresAuth: true,
			authorized: false,
			user: null,
			session: null,
		};
	}

	// Authenticated but wrong account → plain access-denied state. Don't leak
	// the existence of privileged data; just render "not authorized".
	if (!isAdmin(locals.user.email)) {
		return {
			rows: [] as ScheduledVerseRow[],
			requiresAuth: false,
			authorized: false,
			user: locals.user,
			session: locals.session,
		};
	}

	const joined = await db
		.select({
			scheduledDate: verseSubmissions.scheduledDate,
			selectedBookId: verseSubmissions.selectedBookId,
			selectedChapter: verseSubmissions.selectedChapter,
			selectedVerse: verseSubmissions.selectedVerse,
			submittedAt: verseSubmissions.submittedAt,
			dailyDate: dailyVerses.date,
			bookId: dailyVerses.bookId,
			reference: dailyVerses.reference,
			verseText: dailyVerses.verseText,
			userId: verseSubmissions.userId,
			userEmail: user.email,
			userFirstName: user.firstName,
			userLastName: user.lastName,
		})
		.from(verseSubmissions)
		// LEFT JOINs so deleted accounts (ON DELETE SET NULL) still render —
		// the scheduled verse plays out regardless.
		.leftJoin(dailyVerses, eq(verseSubmissions.scheduledDate, dailyVerses.date))
		.leftJoin(user, eq(verseSubmissions.userId, user.id))
		.orderBy(asc(verseSubmissions.scheduledDate));

	const rows: ScheduledVerseRow[] = joined.map((r) => {
		const book = r.bookId ? getBookById(r.bookId) : undefined;
		return {
			scheduledDate: r.scheduledDate,
			reference: r.reference,
			verseText: r.verseText,
			bookId: r.bookId,
			bookName: book?.name ?? null,
			selectedBookId: r.selectedBookId,
			selectedChapter: r.selectedChapter,
			selectedVerse: r.selectedVerse,
			submittedAt: r.submittedAt,
			submitterEmail: r.userEmail,
			submitterName: [r.userFirstName, r.userLastName].filter(Boolean).join(' ') || null,
			// userId is null when the account was deleted (ON DELETE SET NULL)
			submitterDeleted: r.userId === null,
		};
	});

	return {
		rows,
		requiresAuth: false,
		authorized: true,
		user: locals.user,
		session: locals.session,
	};
};