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

export function registerQmemStore(pi: ExtensionAPI) {
	pi.registerTool({
		name: "qmem_store",
		label: "Qmem memory store",
		description:
			"Store one compact, high-signal memory record. project_id is required; do not store raw transcripts.",
		parameters: Type.Object({
			text: Type.String({ description: "Compact memory content." }),
			kind: Type.Optional(
				Type.Union(
					[Type.Literal("decision"), Type.Literal("fact"), Type.Literal("episode"), Type.Literal("preference")],
					{ description: "Record kind; default fact." },
				),
			),
			agent_id: Type.Optional(Type.String({ description: "Writer provenance." })),
			project_id: Type.String({
				description: "Required project ID, kebab-case.",
			}),
			scope: Type.Optional(
				Type.Union([Type.Literal("agent"), Type.Literal("project"), Type.Literal("org")], {
					description: "Scope; default agent.",
				}),
			),
			confidence: Type.Optional(
				Type.Union([Type.Literal("high"), Type.Literal("medium"), Type.Literal("low")], {
					description: "Confidence; default medium.",
				}),
			),
			source: Type.Optional(Type.String({ description: "Source label." })),
			expires_at: Type.Optional(
				Type.String({
					description: "ISO 8601 expiry; omit for permanent records.",
				}),
			),
			supersedes_id: Type.Optional(Type.String({ description: "UUID replaced by this record." })),
			supersede_reason: Type.Optional(Type.String({ description: "Reason for replacement." })),
			parent_id: Type.Optional(Type.String({ description: "Parent UUID." })),
			level: Type.Optional(
				Type.Union([Type.Literal("L1_ROOT"), Type.Literal("L2_SUBTOPIC"), Type.Literal("L3_DETAIL")], {
					description: "Hierarchy level.",
				}),
			),
			topic: Type.Optional(Type.String({ description: "Hierarchy topic ID." })),
			private: Type.Optional(
				Type.Boolean({
					description: "Hide from standard search; use only for sensitive data.",
				}),
			),
			links: Type.Optional(
				Type.Array(
					Type.Object({
						target_id: Type.String({ description: "Target UUID." }),
						predicate: Type.Optional(Type.String({ description: "Relation type." })),
						weight: Type.Optional(Type.Number({ description: "Relation weight; default 1.0." })),
					}),
					{ description: "Related records." },
				),
			),
		}),
		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: salvataggio record..." }] });
			// Rilevamento duplicati: cerca prima di salvare (soglia alta, non blocca)
			let dupes: any[] = [];
			const dupCheck = await gatewayRequest(
				cfg,
				"POST",
				"/v1/memories:search",
				{ query: p.text, project_id: p.project_id, top_k: 3, min_score: 0.92, include_superseded: false },
				signal,
			);
			if (dupCheck.ok) dupes = dupCheck.data.results ?? [];
			// Idempotency: la chiave è generata da submitOrQueue (Idempotency-Key)
			const payload = {
				text: p.text,
				kind: p.kind ?? "fact",
				agent_id: p.agent_id,
				project_id: p.project_id,
				scope: p.scope ?? "agent",
				source: p.source,
				confidence: p.confidence ?? "medium",
				expires_at: p.expires_at,
				supersedes_id: p.supersedes_id,
				supersede_reason: p.supersede_reason,
				parent_id: p.parent_id,
				private: p.private ?? false,
				level: p.level,
				topic: p.topic,
				links: p.links,
			};
			// Online → gateway (con Idempotency-Key); offline → coda locale (outbox)
			const submitted = await submitOrQueue(cfg, payload, { dbFile: localDbPath(cfg) });
			if (submitted.queued) {
				return {
					content: [
						{
							type: "text",
							text:
								`⚠️ Gateway non raggiungibile (HTTP ${submitted.status}): record ACCODATO in locale (outbox).\n` +
								`id locale: ${submitted.local_id}\n` +
								`in coda: ${submitted.queue_size} record\n` +
								(() => {
									const br = breakerInfo();
									return br.open
										? `circuit breaker aperto: nessun nuovo tentativo verso il gateway per altri ${Math.ceil(br.remainingMs / 1000)}s ` +
											`(ultimo errore: ${br.lastError ?? "?"}; per forzare: /qmem:local breaker reset)\n`
										: "";
								})() +
								`Il contenuto è già ricercabile offline (indice locale, marcato ⏳) e verrà caricato automaticamente al ritorno della connessione ` +
								`(/qmem:local flush per forzare, /qmem:local queue per lo stato).`,
						},
					],
					details: {
						queued: true,
						local_id: submitted.local_id,
						queue_size: submitted.queue_size,
						gateway_status: submitted.status,
						breaker: submitted.breaker
							? { open: submitted.breaker.open, remaining_ms: Math.round(submitted.breaker.remainingMs), failures: submitted.breaker.failures }
							: undefined,
					},
				};
			}
			const { ok, status, data } = submitted;
			if (!ok) {
				return {
					content: [{ type: "text", text: `Errore ${status}: ${JSON.stringify(data)}` }],
					details: { error: "gateway_error", status },
				};
			}
			const dupWarning =
				dupes.length > 0
					? "\n⚠️ Possibili duplicati (score >= 0.92, stesso project_id):\n" +
					  dupes.map((d: any) => `  - ${d.memory_id} (score ${d.score}): ${String(d.text).slice(0, 100)}`).join("\n") +
					  "\nValuta se il nuovo record è davvero necessario o se conviene qmem_correct sul duplicato."
					: "";
			const extra = `${p.level ? `, level ${p.level}` : ""}${p.topic ? `, topic ${p.topic}` : ""}${p.parent_id ? ` — parent ${p.parent_id}` : ""}`;
			return {
				content: [{ type: "text", text: `Memoria salvata: ${data.memory_id} (${p.kind ?? "fact"}, scope ${p.scope ?? "agent"}${extra})${p.supersedes_id ? ` — supersede ${p.supersedes_id}` : ""}${dupWarning}` }],
				details: { memory_id: data.memory_id, created_at: data.created_at, duplicates: dupes.length, parent_id: p.parent_id, level: p.level, topic: p.topic },
			};
		},
	});

}