import { error } from '@sveltejs/kit';
import type { PageServerLoad } from './$types';
import { sql } from '$lib/server/db';

export const load: PageServerLoad = async ({ params, locals }) => {
	if (!locals.workspace || !locals.user) error(401);
	const workspace = locals.workspace;
	const entityId = params.id;

	// 1. Hent entiteten
	const [entity] = await sql`
		SELECT e.id, e.name, e.type, e.aliases, e.avatar_url,
			n.created_at, n.updated_at
		FROM entities e
		JOIN nodes n ON n.id = e.id
		WHERE e.id = ${entityId} AND n.workspace_id = ${workspace.id}
	`;
	if (!entity) error(404, 'Entitet ikke funnet');

	// 2. Hent relasjoner (edges) med info om tilkoblede noder
	const edges = await sql`
		SELECT
			ge.id AS edge_id,
			ge.source_id,
			ge.target_id,
			ge.relation_type,
			ge.confidence,
			ge.origin,
			ge.created_at,
			CASE
				WHEN ge.source_id = ${entityId} THEN target_e.name
				ELSE source_e.name
			END AS connected_name,
			CASE
				WHEN ge.source_id = ${entityId} THEN target_e.type
				ELSE source_e.type
			END AS connected_type,
			CASE
				WHEN ge.source_id = ${entityId} THEN ge.target_id
				ELSE ge.source_id
			END AS connected_id,
			CASE
				WHEN ge.source_id = ${entityId} THEN 'outgoing'
				ELSE 'incoming'
			END AS direction
		FROM graph_edges ge
		LEFT JOIN entities source_e ON source_e.id = ge.source_id
		LEFT JOIN entities target_e ON target_e.id = ge.target_id
		WHERE ge.workspace_id = ${workspace.id}
			AND (ge.source_id = ${entityId} OR ge.target_id = ${entityId})
		ORDER BY ge.created_at DESC
	`;

	// 3. Hent meldinger som nevner denne entiteten (via MENTIONS-edges)
	const mentions = await sql`
		SELECT m.id, m.body, m.title, m.message_type, m.created_at,
			u.display_name AS author_name,
			c.id AS channel_id
		FROM graph_edges ge
		JOIN messages m ON m.id = ge.source_id
		LEFT JOIN users u ON u.authentik_id = m.author_id
		LEFT JOIN channels c ON c.id = m.channel_id
		WHERE ge.target_id = ${entityId}
			AND ge.relation_type = 'MENTIONS'
			AND ge.workspace_id = ${workspace.id}
		ORDER BY m.created_at DESC
		LIMIT 50
	`;

	return { entity, edges, mentions };
};