// Paths and constants.

import { homedir } from "node:os";
import { join } from "node:path";

export const MEMORY_DIR = join(homedir(), ".pi", "agent", "memory");
export const DB_PATH = join(MEMORY_DIR, "pi-mem-cc.db");

// Tool output field truncation (chars). Mirrors claude-mem's 16k head/tail.
export const MAX_FIELD_CHARS = 16_000;
export const HEAD_RATIO = 0.6;
export const TAIL_RATIO = 0.3;

// Search defaults.
export const DEFAULT_SEARCH_LIMIT = 10;
export const DEFAULT_TIMELINE_WINDOW_MS = 30 * 60_000; // 30 min

// Skip these noisy tool calls entirely — don't even send to observer.
export const SKIP_TOOLS = new Set<string>([
  // Empty status / health checks.
  // (Add more as needed.)
]);

// Skip these tool calls based on argument shape (return true to skip).
export function shouldSkipByArgs(toolName: string, input: unknown): boolean {
  if (SKIP_TOOLS.has(toolName)) return true;
  // Skip ls with no follow-up potential (very narrow filter; pi's tools are mostly useful).
  if (toolName === "bash") {
    const cmd = (input as { command?: string })?.command ?? "";
    if (/^(ls|pwd|whoami|date|echo)\b/.test(cmd.trim())) return true;
  }
  return false;
}