import { describe, it, expect, vi, beforeEach } from "vitest";
import { loadCliConfig } from "../lib/config.js";

describe("loadCliConfig", () => {
  beforeEach(() => {
    vi.unstubAllEnvs();
  });

  it("loads all required env vars", () => {
    vi.stubEnv("DATABASE_URL", "postgres://localhost:5432/atbb");
    vi.stubEnv("FORUM_DID", "did:plc:test123");
    vi.stubEnv("PDS_URL", "https://bsky.social");
    vi.stubEnv("FORUM_HANDLE", "forum.example.com");
    vi.stubEnv("FORUM_PASSWORD", "secret");

    const config = loadCliConfig();

    expect(config.databaseUrl).toBe("postgres://localhost:5432/atbb");
    expect(config.forumDid).toBe("did:plc:test123");
    expect(config.pdsUrl).toBe("https://bsky.social");
    expect(config.forumHandle).toBe("forum.example.com");
    expect(config.forumPassword).toBe("secret");
  });

  it("returns missing fields list when env vars are absent", () => {
    // Explicitly stub all checked vars to empty — vi.unstubAllEnvs() only
    // reverses previous stubs, it does NOT clear real env vars (e.g. CI
    // sets DATABASE_URL for its PostgreSQL service container).
    vi.stubEnv("DATABASE_URL", "");
    vi.stubEnv("FORUM_DID", "");
    vi.stubEnv("FORUM_HANDLE", "");
    vi.stubEnv("FORUM_PASSWORD", "");

    const config = loadCliConfig();

    expect(config.missing).toContain("DATABASE_URL");
    expect(config.missing).toContain("FORUM_DID");
    expect(config.missing).toContain("FORUM_HANDLE");
    expect(config.missing).toContain("FORUM_PASSWORD");
  });

  it("defaults PDS_URL to https://bsky.social", () => {
    vi.stubEnv("DATABASE_URL", "postgres://localhost/atbb");
    vi.stubEnv("FORUM_DID", "did:plc:test");
    vi.stubEnv("FORUM_HANDLE", "handle");
    vi.stubEnv("FORUM_PASSWORD", "pass");

    const config = loadCliConfig();

    expect(config.pdsUrl).toBe("https://bsky.social");
    expect(config.missing).toHaveLength(0);
  });
});