import { join } from "node:path";
import { fileURLToPath } from "node:url";

const EXTENSION_ID = "pi-permission-system";

/**
 * Bundle-level `config/` is the single source of truth for policy and hard
 * guards: paths resolve relative to this source file so the installed bundle
 * is read directly, with no deployment, seeding, or migration into the agent
 * dir. Only disposable runtime state (logs) stays under `<agentDir>/my-pi/`.
 */
const BUNDLE_CONFIG_DIR = fileURLToPath(new URL("../../config", import.meta.url));
const BUNDLE_MANAGED_DIR = "my-pi";
const BUNDLE_PERMISSION_DIR = "permission-system";

export const DEBUG_LOG_FILENAME = `${EXTENSION_ID}-debug.jsonl`;
export const REVIEW_LOG_FILENAME = `${EXTENSION_ID}-permission-review.jsonl`;

/**
 * Bundle-owned runtime directory under the agent dir — logs only. Stale files
 * left here from earlier deployments are ignored, never migrated.
 */
export function getGlobalConfigDir(agentDir: string): string {
  return join(agentDir, BUNDLE_MANAGED_DIR, BUNDLE_PERMISSION_DIR);
}

export function getGlobalConfigPath(): string {
  return join(BUNDLE_CONFIG_DIR, "pi-permission-policy.jsonc");
}

export function getHardGuardConfigPath(): string {
  return join(BUNDLE_CONFIG_DIR, "pi-permission-hard-guards.jsonc");
}

export function getGlobalLogsDir(agentDir: string): string {
  return join(getGlobalConfigDir(agentDir), "logs");
}

/**
 * Directory holding project-scoped custom agent definition files.
 *
 * `<cwd>/.pi/agents` is a Pi platform convention, also encoded by
 * `@gotgenes/pi-subagents`' `loadCustomAgents` (`config/custom-agents.ts`).
 * The two packages encode it independently — pi-permission-system has no
 * dependency on pi-subagents (ADR-0002) — so this is this package's
 * authoritative copy.
 */
export function getProjectAgentsDir(cwd: string): string {
  return join(cwd, ".pi", "agents");
}