import { homedir } from "node:os";
import { join } from "node:path";
import { resolveGentlePiConfigHome, runningBundledPrefix } from "./gentle-shell-bundled.ts";

export { GENTLE_SHELL_CONFIG_HOME_ENV } from "./gentle-shell-bundled.ts";

// Pi Subagents resolves its global directory as `PI_CODING_AGENT_DIR || ~/.pi/agent`,
// so an empty value must fall through here too or the two homes diverge again.
export function resolveGentlePiAgentHome(env: NodeJS.ProcessEnv = process.env): string {
	return env.GENTLE_PI_AGENT_HOME || env.PI_CODING_AGENT_DIR || join(homedir(), ".pi", "agent");
}

// The Gentle AI config directory outside `~/.pi/agent`: everything the extension
// commands own lives here. It is defined once because the launch-time profile pin
// resolver reads the same profiles store the `/gentle:profiles` panel writes, and
// two spellings of the override would silently read two different stores.
// A bundled Gentle Shell keeps it inside its prefix (S9, bundledGentlePiConfigHome),
// the standalone launcher's isolated home next to its agent dir (#2201). The rule
// itself lives in resolveGentlePiConfigHome, a generated runtime module, so the
// launcher and the Gentle AI process environment share it too.
export function gentlePiConfigHome(env: NodeJS.ProcessEnv = process.env): string {
	return resolveGentlePiConfigHome(env, homedir());
}

// The agent home Pi runs with, only in a bundled Gentle Shell (S9): there the
// extensions that otherwise write under ~/.pi/agent keep their files in it.
// Undefined elsewhere, where they keep their existing locations.
export function bundledGentlePiAgentHome(env: NodeJS.ProcessEnv = process.env): string | undefined {
	return runningBundledPrefix(env) === undefined ? undefined : resolveGentlePiAgentHome(env);
}