import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
import { Type } from "typebox";
import { gatewayRequest, loadConfig } from "../shared.ts";
import { localDbPath, localGet } from "../local-db.ts";

export function registerQmemGet(pi: ExtensionAPI) {
	pi.registerTool({
		name: "qmem_get",
		label: "Qmem memory get by ID",
		description:
			"Fetch one record exactly by UUID, including superseded records. Use qmem_search when the UUID is unknown.",
		parameters: Type.Object({
			memory_id: Type.String({ description: "Record UUID." }),
		}),
		async execute(toolCallId, params, signal, onUpdate, ctx) {
			const cfg = loadConfig();
			if (!cfg.apiKey) {
				return {
					content: [{ type: "text", text: "Config mancante: esegui /qmem:config per impostare url e apiKey." }],
					details: { error: "missing_config" },
				};
			}
			const p = params as any;
			onUpdate?.({ content: [{ type: "text", text: `qmem: recupero record ${p.memory_id}...` }] });
			const { ok, status, data } = await gatewayRequest(cfg, "GET", `/v1/memories/${p.memory_id}`, undefined, signal);
			if (!ok) {
				const notFound = status === 404 || data?.detail === "Memoria non trovata";
				if (!notFound) {
					// Gateway non raggiungibile: tentativo sull'indice locale (SQLite/FTS5)
					try {
						const local = await localGet(p.memory_id, { dbFile: localDbPath(cfg) });
						if (local) {
							return {
								content: [
									{
										type: "text",
										text:
											`⚠️ Gateway non raggiungibile (HTTP ${status}): record dall'INDICE LOCALE (osservazione più vecchia del gateway, può essere incompleta).\n` +
											`memory_id: ${local.memory_id}\n[${local.kind ?? "?"}/${local.scope ?? "?"}${local.project_id ? ` project=${local.project_id}` : ""}] agente: ${local.agent_id ?? "?"}, creato: ${local.created_at ?? "?"}${local.pending ? ", ⏳ creato offline: non ancora sul gateway" : ""}${local.superseded_by ? `, ⚠️ superseduto da ${local.superseded_by}` : ""}${local.remote_id ? `, sincronizzato come ${local.remote_id}` : ""}\n\n${local.text ?? "(nessun testo)"}`,
									},
								],
								details: { memory_id: local.memory_id, fallback: "local_sqlite", gateway_status: status },
							};
						}
					} catch {
						/* indice locale non disponibile: si prosegue con l'errore del gateway */
					}
				}
				return {
					content: [
						{
							type: "text",
							text: notFound
								? `Record ${p.memory_id} non trovato (404). Verifica l'ID (qmem_search include_superseded=true per la lineage) oppure l'URL gateway.`
								: `Errore ${status}: ${JSON.stringify(data)}`,
						},
					],
					details: { error: notFound ? "not_found" : "gateway_error", status, memory_id: p.memory_id },
				};
			}
			const r = data ?? {};
			const meta = [
				`[${r.kind ?? "?"}/${r.scope ?? "?"}${r.level ? ` ${r.level}` : ""}${r.topic ? ` (${r.topic})` : ""}${r.confidence ? ` conf=${r.confidence}` : ""}]`,
				`project: ${r.project_id ?? "?"}`,
				`agente: ${r.agent_id ?? "?"}, creato: ${r.created_at ?? "?"}${r.source ? `, fonte: ${r.source}` : ""}`,
			];
			if (r.parent_id) meta.push(`parent: ${r.parent_id}`);
			if (r.links && r.links.length > 0) meta.push(`links: ${r.links.length}`);
			if (r.supersedes_id) meta.push(`supersede ${r.supersedes_id}`);
			if (r.superseded_by) meta.push(`⚠️ SUPERSEDUTO da ${r.superseded_by}`);
			if (r.expires_at) meta.push(`scade: ${r.expires_at}`);
			const lines = [`memory_id: ${r.memory_id ?? p.memory_id}`, meta.join(" | "), "", r.text ?? "(nessun testo)"];
			return {
				content: [{ type: "text", text: lines.join("\n") }],
				details: {
					memory_id: r.memory_id ?? p.memory_id,
					kind: r.kind,
					scope: r.scope,
					project_id: r.project_id,
					parent_id: r.parent_id,
					level: r.level,
					topic: r.topic,
					superseded_by: r.superseded_by ?? null,
				},
			};
		},
	});

}