import { describe, expect, it } from "vitest";
import {
  formatDurationCompact,
  formatTokenShort,
  formatTokenUsageDisplay,
  resolveIoTokens,
  resolveTotalTokens,
  truncateLine,
} from "./subagents-format.js";

describe("shared/subagents-format", () => {
  it("re-exports the canonical formatter with second-level precision", () => {
    expect(formatDurationCompact()).toBeUndefined();
    expect(formatDurationCompact(30_000)).toBe("30s");
    expect(formatDurationCompact(90_000)).toBe("1m30s");
    expect(formatDurationCompact(60 * 60_000)).toBe("1h");
    expect(formatDurationCompact(61 * 60_000)).toBe("1h1m");
    expect(formatDurationCompact(24 * 60 * 60_000)).toBe("1d");
    expect(formatDurationCompact(25 * 60 * 60_000)).toBe("1d1h");
  });

  it("formats token counts with integer, kilo, and million branches", () => {
    expect(formatTokenShort()).toBeUndefined();
    expect(formatTokenShort(999.9)).toBe("999");
    expect(formatTokenShort(1_500)).toBe("1.5k");
    expect(formatTokenShort(10_000)).toBe("10k");
    expect(formatTokenShort(15_400)).toBe("15k");
    expect(formatTokenShort(1_000_000)).toBe("1m");
    expect(formatTokenShort(1_250_000)).toBe("1.3m");
  });

  it("truncates lines only when needed", () => {
    expect(truncateLine("short", 10)).toBe("short");
    expect(truncateLine("trim me   ", 7)).toBe("trim me...");
  });

  it("resolves token totals and io breakdowns from valid numeric fields only", () => {
    expect(resolveTotalTokens()).toBeUndefined();
    expect(resolveTotalTokens({ totalTokens: 42 })).toBe(42);
    expect(resolveTotalTokens({ inputTokens: 10, outputTokens: 5 })).toBe(15);
    expect(resolveTotalTokens({ inputTokens: Number.NaN, outputTokens: 5 })).toBeUndefined();

    expect(resolveIoTokens({ inputTokens: 10, outputTokens: 5 })).toEqual({
      input: 10,
      output: 5,
      total: 15,
    });
    expect(resolveIoTokens({ outputTokens: 5 })).toEqual({
      input: 0,
      output: 5,
      total: 5,
    });
    expect(resolveIoTokens({ inputTokens: Number.NaN, outputTokens: 0 })).toBeUndefined();
  });

  it("formats io and prompt-cache usage displays with fallback branches", () => {
    expect(
      formatTokenUsageDisplay({
        inputTokens: 1_200,
        outputTokens: 300,
        totalTokens: 2_100,
      }),
    ).toBe("tokens 1.5k (in 1.2k / out 300), prompt/cache 2.1k");

    expect(formatTokenUsageDisplay({ totalTokens: 500 })).toBe("tokens 500 prompt/cache");
    expect(
      formatTokenUsageDisplay({
        inputTokens: 1_200,
        outputTokens: 300,
        totalTokens: 1_500,
      }),
    ).toBe("tokens 1.5k (in 1.2k / out 300)");
    expect(formatTokenUsageDisplay({ inputTokens: 0, outputTokens: 0, totalTokens: 0 })).toBe("");
  });
});