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import { describe, expect, it } from "vitest";
import {
  DEFAULT_REASONING_EFFORT,
  effectiveEffort,
  effortOptions,
  isReasoningEffort,
  REASONING_EFFORT_LEVELS,
} from "./reasoning-effort";

describe("reasoning-effort helpers", () => {
  it("ladder matches the wire contract, in ascending depth order", () => {
    expect(REASONING_EFFORT_LEVELS).toEqual(["low", "medium", "high", "xhigh", "max"]);
  });

  it("the server default is high", () => {
    expect(DEFAULT_REASONING_EFFORT).toBe("high");
  });

  it("isReasoningEffort narrows ladder strings and rejects everything else", () => {
    for (const level of REASONING_EFFORT_LEVELS) {
      expect(isReasoningEffort(level)).toBe(true);
    }
    expect(isReasoningEffort("banana")).toBe(false);
    expect(isReasoningEffort("")).toBe(false);
    expect(isReasoningEffort("HIGH")).toBe(false);
  });

  it("effectiveEffort maps null (never set) to the default, not 'off'", () => {
    expect(effectiveEffort(null)).toBe("high");
  });

  it("effectiveEffort passes a persisted value through", () => {
    expect(effectiveEffort("xhigh")).toBe("xhigh");
    expect(effectiveEffort("low")).toBe("low");
  });

  it("effortOptions lists every level once and marks only the default", () => {
    const options = effortOptions();
    expect(options.map((o) => o.value)).toEqual([...REASONING_EFFORT_LEVELS]);
    expect(options.find((o) => o.value === "high")?.label).toBe("high (default)");
    for (const option of options) {
      if (option.value !== "high") expect(option.label).toBe(option.value);
    }
  });
});