export class DingtalkConfigError extends Error {
  constructor(message = '当前环境未配置钉钉登录') {
    super(message)
    this.name = 'DingtalkConfigError'
  }
}

export interface DingtalkAppConfig {
  clientId: string
  clientSecret: string
}

function readEnv(name: string): string {
  return (process.env[name] || '').trim()
}

export function getDingtalkPublicConfig() {
  const clientId = readEnv('DINGTALK_CLIENT_ID')
  const clientSecret = readEnv('DINGTALK_CLIENT_SECRET')
  const callbackUrl =
    readEnv('DINGTALK_CALLBACK_URL') || readEnv('NEXT_PUBLIC_DINGTALK_CALLBACK_URL')

  return {
    enabled: Boolean(clientId && clientSecret),
    clientId: clientId && clientSecret ? clientId : null,
    callbackUrl: callbackUrl || null,
  }
}

export function requireDingtalkAppConfig(): DingtalkAppConfig {
  const clientId = readEnv('DINGTALK_CLIENT_ID')
  const clientSecret = readEnv('DINGTALK_CLIENT_SECRET')

  if (!clientId || !clientSecret) {
    throw new DingtalkConfigError()
  }

  return { clientId, clientSecret }
}