import { describe, expect, test } from "bun:test";
import {
  optionalEnvironmentValue,
  readFeatureEnvironment,
  requiredEnvironmentUrl,
  requiredEnvironmentValue,
} from "@/lib/config/environment";

describe("feature environment configuration", () => {
  test("returns trimmed required and optional values", () => {
    const environment = { REQUIRED: " value ", OPTIONAL: " optional " };
    expect(requiredEnvironmentValue("REQUIRED", environment)).toBe("value");
    expect(optionalEnvironmentValue("OPTIONAL", environment)).toBe("optional");
    expect(optionalEnvironmentValue("MISSING", environment)).toBeNull();
  });

  test("reports the feature and missing variable", () => {
    expect(() =>
      readFeatureEnvironment("Discord", ["TOKEN", "GUILD"] as const, {
        TOKEN: "token",
      }),
    ).toThrow("Discord is not configured: Missing required environment variable: GUILD");
  });

  test("accepts absolute URLs and removes a trailing slash", () => {
    expect(requiredEnvironmentUrl("BASE_URL", { BASE_URL: "https://example.com/" }))
      .toBe("https://example.com");
    expect(() => requiredEnvironmentUrl("BASE_URL", { BASE_URL: "/relative" }))
      .toThrow("must be an absolute URL");
  });
});