import { describe, it, expect } from 'vitest';
import { spawnSync } from 'child_process';
import path from 'path';

describe('Config Validator & Invalid Connections', () => {
  const backendDir = path.resolve(__dirname, '../../');

  it('should fail validation when DATABASE_URL is missing', () => {
    const res = spawnSync('npx', ['tsx', 'src/config/env.ts'], {
      cwd: backendDir,
      env: {
        ...process.env,
        DATABASE_URL: '',
        JWT_SECRET: 'supersecretjwtkeyforcoaxyspanelbackendproject12345',
      },
    });

    expect(res.status).toBe(1);
    const stderr = res.stderr.toString();
    expect(stderr).toContain('Invalid environment configuration');
    expect(stderr).toContain('DATABASE_URL');
  });

  it('should fail validation when DATABASE_URL is not a valid URL', () => {
    const res = spawnSync('npx', ['tsx', 'src/config/env.ts'], {
      cwd: backendDir,
      env: {
        ...process.env,
        DATABASE_URL: 'invalid-url-format',
        JWT_SECRET: 'supersecretjwtkeyforcoaxyspanelbackendproject12345',
      },
    });

    expect(res.status).toBe(1);
    const stderr = res.stderr.toString();
    expect(stderr).toContain('Invalid environment configuration');
    expect(stderr).toContain('DATABASE_URL');
  });

  it('should fail validation when JWT_SECRET is too short', () => {
    const res = spawnSync('npx', ['tsx', 'src/config/env.ts'], {
      cwd: backendDir,
      env: {
        ...process.env,
        DATABASE_URL: 'postgresql://coaxys_panel:coaxys_pass@127.0.0.1:5432/coaxys_panel?schema=public',
        JWT_SECRET: 'short',
      },
    });

    expect(res.status).toBe(1);
    const stderr = res.stderr.toString();
    expect(stderr).toContain('Invalid environment configuration');
    expect(stderr).toContain('JWT_SECRET');
  });

  it('should propagate connection error when using an invalid database port', () => {
    // Attempt to start index.ts with an invalid DB port, which should cause connection to fail on startup.
    // We set PORT to a random high port so it doesn't conflict, and invalid database port with connection timeout.
    const res = spawnSync('npx', ['tsx', 'src/index.ts'], {
      cwd: backendDir,
      env: {
        ...process.env,
        PORT: '14002',
        DATABASE_URL: 'postgresql://coaxys_panel:coaxys_pass@127.0.0.1:9999/coaxys_panel?schema=public&connect_timeout=2',
        JWT_SECRET: 'supersecretjwtkeyforcoaxyspanelbackendproject12345',
      },
      timeout: 10000, // Timeout after 10s if it hangs
    });

    // It should exit with 1 because the database connection fails on startup
    expect(res.status).toBe(1);
    const stderr = res.stderr.toString() || res.stdout.toString();
    // Verify connection error details are propagated
    expect(stderr).toContain('Can\'t reach database server at');
  });
});