import { describe, it, expect } from "vitest";
import { formatOutput, detectFormat } from "../src/utils/format";

describe("format utils", () => {
  it("formatOutput json should stringify", () => {
    const result = formatOutput({ ok: true, data: "test" }, "json");
    const parsed = JSON.parse(result);
    expect(parsed.ok).toBe(true);
    expect(parsed.data).toBe("test");
  });

  it("formatOutput json should handle arrays", () => {
    const result = formatOutput([{ id: 1, name: "a" }], "json");
    const parsed = JSON.parse(result);
    expect(parsed).toHaveLength(1);
    expect(parsed[0].id).toBe(1);
  });

  it("formatOutput table should handle arrays", () => {
    const result = formatOutput(
      [
        { id: 1, name: "Device A" },
        { id: 2, name: "Device B" },
      ],
      "table",
    );
    expect(result).toContain("Device A");
    expect(result).toContain("Device B");
    expect(result).toContain("id");
    expect(result).toContain("name");
  });

  it("formatOutput table should handle empty array", () => {
    const result = formatOutput([], "table");
    expect(result).toBe("(empty)");
  });

  it("formatOutput table should handle flat object", () => {
    const result = formatOutput(
      { gateway: "http://localhost:8000", tenant: "default" },
      "table",
    );
    expect(result).toContain("gateway");
    expect(result).toContain("default");
  });

  it("formatOutput should keep 204 results silent", () => {
    expect(formatOutput(undefined, "json")).toBe("");
    expect(formatOutput(undefined, "table")).toBe("");
    expect(formatOutput(undefined, "yaml")).toBe("");
  });
});