/**
 * Foundational types and constants for pi-run-mode. Zero business-logic deps:
 * every other module may import from here, but this file imports from none of
 * them.
 */

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

export type Mode = "ask" | "plan" | "auto";
export const MODES: Mode[] = ["ask", "plan", "auto"];
export const DEFAULT_MODE: Mode = "ask";

export type ThinkingLevel =
  | "off"
  | "minimal"
  | "low"
  | "medium"
  | "high"
  | "xhigh"
  | "max";
export const THINKING_LEVELS: ThinkingLevel[] = [
  "off",
  "minimal",
  "low",
  "medium",
  "high",
  "xhigh",
  "max",
];

export type ModelRef = {
  provider: string;
  id: string;
  thinkingLevel?: ThinkingLevel;
};

// A mode switch. Defined here so plan/ and modes/ share it without coupling.
export type SetMode = (newMode: Mode) => Promise<void>;

// Session log customType — kept stable so old sessions still restore mode.
export const STATE_ENTRY_TYPE = "agent-mode-state";

export const STATE_FILE_PATH = join(
  homedir(),
  ".pi",
  "agent",
  "pi-run-mode.json",
);