import { afterEach, describe, expect, test } from "bun:test";

import { getEmailReadiness } from "../src";

const originalEnv = {
  EMAIL_FROM: process.env.EMAIL_FROM,
  EMAIL_PROVIDER: process.env.EMAIL_PROVIDER,
  NODE_ENV: process.env.NODE_ENV,
  RESEND_API_KEY: process.env.RESEND_API_KEY,
  SMTP_HOST: process.env.SMTP_HOST,
  SMTP_PORT: process.env.SMTP_PORT,
};

afterEach(() => {
  for (const [key, value] of Object.entries(originalEnv)) {
    if (value === undefined) delete process.env[key];
    else process.env[key] = value;
  }
});

describe("email provider readiness", () => {
  test("accepts a configured Mailpit transport in development", () => {
    process.env.NODE_ENV = "development";
    process.env.EMAIL_PROVIDER = "mailpit";
    process.env.EMAIL_FROM = "beenvoice <noreply@beenvoice.test>";
    process.env.SMTP_HOST = "127.0.0.1";
    process.env.SMTP_PORT = "1028";

    expect(getEmailReadiness()).toEqual({
      provider: "mailpit",
      configured: true,
      missing: [],
    });
  });

  test("rejects Mailpit in production", () => {
    process.env.NODE_ENV = "production";
    process.env.EMAIL_PROVIDER = "mailpit";
    process.env.EMAIL_FROM = "beenvoice <noreply@beenvoice.test>";
    process.env.SMTP_HOST = "mailpit";
    process.env.SMTP_PORT = "1025";

    expect(getEmailReadiness().configured).toBe(false);
    expect(getEmailReadiness().missing).toContain(
      "EMAIL_PROVIDER (mailpit is development-only)",
    );
  });

  test("accepts a per-business Resend key", () => {
    process.env.NODE_ENV = "production";
    process.env.EMAIL_PROVIDER = "resend";
    process.env.EMAIL_FROM = "beenvoice <noreply@beenvoice.app>";
    delete process.env.RESEND_API_KEY;

    expect(getEmailReadiness({ resendApiKey: "re_business" }).configured).toBe(
      true,
    );
  });
});