import { afterEach, describe, expect, it, vi } from "vitest";
import { readFileSync } from "node:fs";
import { resolve } from "node:path";

afterEach(async () => {
  vi.resetAllMocks();
  vi.resetModules();
  vi.doUnmock("nodemailer");
});

describe("A02 Security Misconfiguration", () => {
  it("enforces CORS allowlist in production", async () => {
    const { buildApp } = await import("../src/server");
    const app = await buildApp({
      NODE_ENV: "production",
      CORS_ORIGINS: "https://allowed.example.com",
      AUTH_DISABLED: false,
      SEED_DEFAULT_BUDGET: false,
      APP_ORIGIN: "https://allowed.example.com",
    });
    await app.ready();

    try {
      const allowedOrigin = "https://allowed.example.com";
      const deniedOrigin = "https://denied.example.com";

      const allowed = await app.inject({
        method: "OPTIONS",
        url: "/health",
        headers: {
          origin: allowedOrigin,
          "access-control-request-method": "GET",
        },
      });

      expect(allowed.statusCode).toBe(204);
      expect(allowed.headers["access-control-allow-origin"]).toBe(allowedOrigin);
      expect(allowed.headers["access-control-allow-credentials"]).toBe("true");

      const denied = await app.inject({
        method: "OPTIONS",
        url: "/health",
        headers: {
          origin: deniedOrigin,
          "access-control-request-method": "GET",
        },
      });

      expect([204, 404]).toContain(denied.statusCode);
      expect(denied.headers["access-control-allow-origin"]).toBeUndefined();
      expect(denied.headers["access-control-allow-credentials"]).toBeUndefined();
    } finally {
      await app.close();
    }
  });

  it("applies expected CORS response headers at runtime for allowed origins", async () => {
    const { buildApp } = await import("../src/server");
    const app = await buildApp({
      NODE_ENV: "production",
      CORS_ORIGINS: "https://allowed.example.com",
      AUTH_DISABLED: false,
      SEED_DEFAULT_BUDGET: false,
      APP_ORIGIN: "https://allowed.example.com",
    });
    await app.ready();

    try {
      const response = await app.inject({
        method: "OPTIONS",
        url: "/health",
        headers: {
          origin: "https://allowed.example.com",
          "access-control-request-method": "GET",
        },
      });

      expect(response.statusCode).toBe(204);
      expect(response.headers["access-control-allow-origin"]).toBe(
        "https://allowed.example.com"
      );
      expect(response.headers["access-control-allow-credentials"]).toBe("true");
      expect(response.headers.vary).toContain("Origin");
    } finally {
      await app.close();
    }
  });

  it("disables SMTP debug logger in production mailer config", async () => {
    const verify = vi.fn(async () => undefined);
    const sendMail = vi.fn(async () => ({ messageId: "mock-message-id" }));
    const createTransport = vi.fn(() => ({ verify, sendMail }));
    vi.doMock("nodemailer", () => ({
      default: { createTransport },
    }));

    const { buildApp } = await import("../src/server");
    const app = await buildApp({
      NODE_ENV: "production",
      SMTP_HOST: "smtp.example.com",
      SMTP_PORT: 587,
      SMTP_REQUIRE_TLS: true,
      SMTP_TLS_REJECT_UNAUTHORIZED: true,
      SMTP_USER: "smtp-user",
      SMTP_PASS: "smtp-pass",
      CORS_ORIGINS: "https://allowed.example.com",
      APP_ORIGIN: "https://allowed.example.com",
      AUTH_DISABLED: false,
      SEED_DEFAULT_BUDGET: false,
    });

    try {
      await app.ready();
      expect(createTransport).toHaveBeenCalledTimes(1);
      const transportOptions = createTransport.mock.calls[0]?.[0] as Record<string, unknown>;
      expect(transportOptions.requireTLS).toBe(true);
      expect(transportOptions.logger).toBe(false);
      expect(transportOptions.debug).toBe(false);
    } finally {
      await app.close();
    }
  });

  it("defines anti-framing headers in edge configs", () => {
    const root = resolve(__dirname, "..", "..");
    const caddyProd = readFileSync(resolve(root, "Caddyfile.prod"), "utf8");
    const caddyDev = readFileSync(resolve(root, "Caddyfile.dev"), "utf8");
    const nginxProd = readFileSync(
      resolve(root, "deploy/nginx/skymoneybudget.com.conf"),
      "utf8"
    );

    expect(caddyProd).toContain('X-Frame-Options "DENY"');
    expect(caddyProd).toContain(`Content-Security-Policy "frame-ancestors 'none'"`);
    expect(caddyDev).toContain('X-Frame-Options "DENY"');
    expect(caddyDev).toContain(`Content-Security-Policy "frame-ancestors 'none'"`);
    expect(nginxProd).toContain('add_header X-Frame-Options "DENY" always;');
    expect(nginxProd).toContain(
      `add_header Content-Security-Policy "frame-ancestors 'none'" always;`
    );
  });

  it("keeps docker-compose service ports bound to localhost only", () => {
    const root = resolve(__dirname, "..", "..");
    const compose = readFileSync(resolve(root, "docker-compose.yml"), "utf8");

    expect(compose).toContain('- "127.0.0.1:5432:5432"');
    expect(compose).toContain('- "127.0.0.1:8081:8080"');
  });
});