import { error } from '@sveltejs/kit';
import type { LayoutServerLoad } from './$types';

export const load: LayoutServerLoad = async ({ params, locals }) => {
	const { session, user } = await locals.safeGetSession();

	if (!session || !user) {
		error(401, 'Unauthorized');
	}

	// Fetch org first (need org.id for subsequent queries)
	const { data: org, error: orgError } = await locals.supabase
		.from('organizations')
		.select('*')
		.eq('slug', params.orgSlug)
		.single();

	if (orgError || !org) {
		error(404, 'Organization not found');
	}

	// Now fetch membership, members, activity, and user profile in parallel (all depend on org.id)
	const [membershipResult, membersResult, activityResult, profileResult, docCountResult, folderCountResult, kanbanCountResult, eventCountResult] = await Promise.all([
		locals.supabase
			.from('org_members')
			.select('role, role_id')
			.eq('org_id', org.id)
			.eq('user_id', user.id)
			.single(),
		locals.supabase
			.from('org_members')
			.select('id, user_id, role')
			.eq('org_id', org.id)
			.limit(10),
		locals.supabase
			.from('activity_log')
			.select(`
				id,
				action,
				entity_type,
				entity_id,
				entity_name,
				created_at,
				profiles:user_id (
					full_name,
					email
				)
			`)
			.eq('org_id', org.id)
			.order('created_at', { ascending: false })
			.limit(10),
		locals.supabase
			.from('profiles')
			.select('id, email, full_name, avatar_url')
			.eq('id', user.id)
			.single(),
		locals.supabase
			.from('documents')
			.select('id', { count: 'exact', head: true })
			.eq('org_id', org.id)
			.eq('type', 'document'),
		locals.supabase
			.from('documents')
			.select('id', { count: 'exact', head: true })
			.eq('org_id', org.id)
			.eq('type', 'folder'),
		locals.supabase
			.from('documents')
			.select('id', { count: 'exact', head: true })
			.eq('org_id', org.id)
			.eq('type', 'kanban'),
		locals.supabase
			.from('events')
			.select('id', { count: 'exact', head: true })
			.eq('org_id', org.id)
	]);

	const { data: membership } = membershipResult;
	const { data: rawMembers } = membersResult;
	const { data: recentActivity } = activityResult;
	const { data: profile } = profileResult;

	const stats = {
		memberCount: (rawMembers ?? []).length,
		documentCount: docCountResult.count ?? 0,
		folderCount: folderCountResult.count ?? 0,
		kanbanCount: kanbanCountResult.count ?? 0,
		eventCount: eventCountResult.count ?? 0,
	};

	if (!membership) {
		error(403, 'You are not a member of this organization');
	}

	// Resolve user's permissions from their custom org_role (if assigned)
	let userPermissions: string[] | null = null;
	if (membership.role_id) {
		const { data: roleData } = await locals.supabase
			.from('org_roles')
			.select('permissions')
			.eq('id', membership.role_id)
			.single();

		if (roleData?.permissions && Array.isArray(roleData.permissions)) {
			userPermissions = roleData.permissions as string[];
		}
	}

	// Fetch profiles separately since org_members.user_id FK points to auth.users, not profiles
	const memberUserIds = (rawMembers ?? []).map(m => m.user_id).filter((id): id is string => id !== null);
	let memberProfilesMap: Record<string, { id: string; email: string; full_name: string | null; avatar_url: string | null }> = {};

	if (memberUserIds.length > 0) {
		const { data: memberProfiles } = await locals.supabase
			.from('profiles')
			.select('id, email, full_name, avatar_url')
			.in('id', memberUserIds);

		if (memberProfiles) {
			memberProfilesMap = Object.fromEntries(memberProfiles.map(p => [p.id, p]));
		}
	}

	const members = (rawMembers ?? []).map(m => ({
		...m,
		profiles: (m.user_id ? memberProfilesMap[m.user_id] : null) ?? null
	}));

	// Fetch upcoming events for the overview
	const { data: upcomingEvents } = await locals.supabase
		.from('events')
		.select('id, name, slug, status, start_date, end_date, color, venue_name')
		.eq('org_id', org.id)
		.in('status', ['planning', 'active'])
		.order('start_date', { ascending: true, nullsFirst: false })
		.limit(5);

	return {
		org,
		userRole: membership.role,
		userPermissions,
		members,
		recentActivity: recentActivity ?? [],
		stats,
		upcomingEvents: upcomingEvents ?? [],
		user,
		profile: profile ?? { id: user.id, email: user.email ?? '', full_name: null, avatar_url: null }
	};
};