// What the terminal page decides about cancelling a turn. Run by `npm test`.
import assert from "node:assert/strict";
import { test } from "node:test";
import {
  canCancel,
  cancelNote,
  cancelPath,
  statusOnTurnChange,
} from "../src/agent/terminal/cancel.ts";

test("cancel is offered while the agent is in a turn, and only then", () => {
  assert.equal(canCancel("thinking"), true);
  assert.equal(canCancel("idle"), false);
  assert.equal(canCancel("compacting"), false);
  assert.equal(canCancel(undefined), false);
});

test("the cancel path names the agent, escaped", () => {
  assert.equal(cancelPath("iris"), "/api/agents/iris/cancel");
  assert.equal(cancelPath("a/b"), "/api/agents/a%2Fb/cancel");
});

test("the note says whether a turn was stopped", () => {
  assert.equal(cancelNote(true), "turn cancelled");
  assert.equal(cancelNote(false), "nothing was running");
});

test("the answer stays after its turn ends and clears when the next starts", () => {
  assert.equal(statusOnTurnChange("done", "thinking", "idle"), "done");
  assert.equal(statusOnTurnChange("done", "idle", "idle"), "done");
  assert.equal(statusOnTurnChange("done", "idle", "thinking"), "idle");
});

test("a failure clears when its turn ends, or a new one starts", () => {
  assert.equal(statusOnTurnChange("error", "thinking", "thinking"), "error");
  assert.equal(statusOnTurnChange("error", "thinking", "idle"), "idle");
  assert.equal(statusOnTurnChange("error", "idle", "thinking"), "idle");
});

test("a cancel in flight is left alone", () => {
  assert.equal(
    statusOnTurnChange("cancelling", "thinking", "idle"),
    "cancelling",
  );
  assert.equal(
    statusOnTurnChange("cancelling", "idle", "thinking"),
    "cancelling",
  );
});