const EN_REF = {
  'back': 'Back',
  'welcome.btn-login': 'Log in',
  'welcome.btn-signup': 'Sign up',
  'welcome.email-password-missing': 'Email and password are required',
  'welcome.username-missing': 'Username/email is required',
  'welcome.waiting-turnstile': 'Waiting for Turnstile to verify your network environment...',
  'welcome.turnstile-error': 'Error verifying your network environment. Please turn off your VPN and try again.',
  'welcome.turnstile-timeout': 'Network verification timed out. Please try again.',
  'welcome.verification-sent': 'A verification email has been sent to ${email}. Please check your inbox!',
  'welcome.verify-state-0': "You haven't verified your email. A verification email had been sent to your inbox less than a minute ago. Please check your inbox!",
  'welcome.verify-state-1': "You haven't verified your email. We've already sent 3 emails over the last 24 hours so we'll not send another one. Please check your inbox!",
  'welcome.verify-state-2': "You haven't verified your email. We just sent you another verification email. Please check your inbox!",
  'welcome.verifying': "Verifying your email... please wait.",
  'welcome.verified': "Your email has been verified! You can now log in now.",
  'welcome.verification-failed': 'Verification failed: ${message}. Please try again.',
}

const msgs: { [index: string]: typeof EN_REF } = {
  en: EN_REF,
  zh: {
    'back': '返回',
    'welcome.btn-login': '登录',
    'welcome.btn-signup': '注册',
    'welcome.email-password-missing': '邮箱和密码必须填哦',
    'welcome.username-missing': '用户名/邮箱必须填哦',
    'welcome.waiting-turnstile': '正在验证网络环境...',
    'welcome.turnstile-error': '验证网络环境出错了，请关闭VPN后重试',
    'welcome.turnstile-timeout': '验证网络环境超时了，请重试',
    'welcome.verification-sent': '验证邮件已发送至 ${email}，请翻翻收件箱',
    'welcome.verify-state-0': '您还没有验证邮箱哦！验证邮件一分钟内刚刚发到您的邮箱，请翻翻收件箱',
    'welcome.verify-state-1': '您还没有验证邮箱哦！我们在过去的24小时内已经发送了3封验证邮件，所以我们不会再发送了，请翻翻收件箱',
    'welcome.verify-state-2': '您还没有验证邮箱哦！我们刚刚又发送了一封验证邮件，请翻翻收件箱',
    'welcome.verifying': '正在验证邮箱...请稍等',
    'welcome.verified': '您的邮箱已经验证成功！您现在可以登录了',
    'welcome.verification-failed': '验证失败：${message}。请重试',
  }
}

let lang = 'en'

// Infer language from browser
if (navigator.language.startsWith('zh')) {
  lang = 'zh'
}

export function t(key: keyof typeof EN_REF, variables?: { [index: string]: string }) {
  if (variables) {
    return msgs[lang][key].replace(/\${(.*?)}/g, (_, v) => variables[v])
  }
  return msgs[lang][key]
}