/**
 * Path resolution for tool arguments.
 *
 * Mirrors Pi's built-in tool convention: a leading "@" is stripped before
 * resolving, and relative paths resolve against the session working directory.
 */

import { isAbsolute, resolve } from "node:path";
import type { ExtensionContext } from "@earendil-works/pi-coding-agent";

/** Strips a leading "@" prefix that some models add to file paths. */
export function stripLeadingAt(target: string): string {
	return target.startsWith("@") ? target.slice(1) : target;
}

/** Resolves a tool path argument against the session working directory. */
export function resolveTargetPath(ctx: Pick<ExtensionContext, "cwd">, target: string): string {
	const cleaned = stripLeadingAt(target.trim());
	if (cleaned === "" || cleaned === ".") {
		return ctx.cwd;
	}
	return isAbsolute(cleaned) ? cleaned : resolve(ctx.cwd, cleaned);
}