export interface ExternalDataRequest {
    // meta fields
    // the requst object might change from to time, this field serves as a hint to Tiktok's server
    version: string; // 1.0 for the time being, tiktok will announce any updates if needed.
    timestamp: string; // unix epoch time, the string format of Date.now()
    locale: en | fr | es; // if passed values other than the ones listed here, we will fallback to English
    
    // optional, defaults to 'close_from_tiktok'
    // No matter which option you choose, tiktok will try to do 'window.opener.focus()' and wrap it in an exception block
    // if your csp rule does not accept our domain.
    
    // described at the bottom of the README, default value is 'close_from_tiktok'
    close_method?: 'close_from_tiktok' | 'redirect_inside_tiktok' | 'send_message' | 'do_nothing';

    // level 1 fields, which are required by all platforms
    // talk to your tiktok's business_platformentative to know which constant we are using for your platform
    business_platform: string;
    // should be the shop id / shop hash of your platform
    external_business_id: string;
    

    // level 2 fields,
    // Take a look at this [page](https://ads.tiktok.com/business-extension/external_data_helper)
    // if you are not sure how to set the relevant fields
    industry?: string; 
    timezone?: string;
    country_region?: string;
    store_name?: string;
    // format should be like +86 13817282221
    phone_number?: string;
    email?: string;
    currency?: string;
    website_url?: string;
    domain?: string;

    
    /* level 3 fields
     * For platform who commissions Tiktok to create the management page, please ignore the following fields!
     *
     * For platform who wants to create the management page by themselves, you'll have to apply for a Tiktok Mapi app
     * first. As such, you will be able to call Tiktok MApi via our access_token
     * https://ads.tiktok.com/marketing_api/docs?rid=n1ow2qmxk7&id=1701890909484033
     * When the user clicks "finish setup", Tiktok's server will launch an oauth2 flow using app_id and redirect_uri
     * and will take the user to "redirect_uri" along with 2 parameters, the auth_code and the state which are defined below
     * it is the external platform's responsibility to exchange auth_code for accessToken and save it in their own storage
    */
    
    // here is your MApi app_id, which will become available after the approval of your MApi app.
    app_id?: string;
    
    // The redirect_uri parameter should be the same value as the one in the MApi app configuration
    // this uri should be hosted by the server of the external business platform.
    redirect_uri?: string;
    
    // Pass this parameter if you want to use different app_id and redirect_uri for different environment,
    // the env name should be in snake_case.
    // for example, dev,prod,qa,staging,test_env1,test_env2
    // note that if you have different environment, you should also provide a different key to generate hmac
    // defaults to 'prod' environment if not provided
    // Note that for each environment,you should apply for a different Mapi app.
    // So if you have 3 environmnts, you should apply 3 apps and pass the app_id and redirect_uri in the form of external_data, 
    // and finally provide us with 3 different hash keys via email or common group chats.
    /*
     {
       // we don't store you app_id and redirect_uri, always encode them in the external_data.
        aPlatform: [
            {
               env: 'prod',
               key: '12345', //co-determined key to genrate hmac
           },
            {
               env: 'qa',
               key: '123456', //co-determined key to genrate hmac
            },
            {
               env: 'dev',
               key: '1234567', //co-determined key to genrate hmac
            }
           
        ]
     }
    */
    env?: string; 
    
    // New features will be rolled out to alpha users for internal testing before GA(Generally available)
    // pass in the feature names which you think is ok to be displayed to the current store
    // current there is only one supported value: 'tt_shop'
    // e.g. whitelisted_features: ['tt_shop']
    // Note that on the tiktok side, we do have another layer of checking logic to see whether one feature
    // is grantable to a specific platform even if whitelisted_features is explicitly set on the external business
    // platform's end.
    whitelisted_features?: ['alpha_featureA','alpha_featureB'],
    
    // optional state in case you need it
    // pass this data as a normal string and there's no need to encode it,
    // tiktok will pass it back in a query param when redirecting back to your server
    // we will use encodeURIComponent(youState) and its your responsibility to decodeURIComponent(state) on your side
    // For instance, the url would look like `https://yourdomain/your_callback?state=${encodeURIComponent(yourState)}`
    state?: string;

 {
  "version": "1.0",
  "timestamp": "1622469374637",
  "locale": "en",
  "business_platform": "PLATFORM_NAME",
  "external_business_id": "1238928921223",
  "industry": "cosmetics",
  "timezone": "UTC+0",
  "country_region": "CN",
  "store_name": "qq_testforbusinessaaaa",
  "phone_number": "1232132121232",
  "email": "[email protected]",
  "currency": "RMB",
  "website_url": "www.a.com/test12311sdas123",
  "domain": "https://aa.com",
  "app_id": "12312321321321",
  "redirect_uri": "https://example.com/api/callback",
  "state" :"someConvenientInfo"
}

 version=1.0&timestamp=1622469374637&locale=en&business_platform=bigcommerce&external_business_id=1238928921223

// nodejs code example
 function getHmac4Node(str: string) {
    return crypto.createHmac('sha256', KEY).update(str).digest('hex');
  }
  
hmac example: 6afb803ad5bbe2be9dd09dc2bcc4513db1d6493dd214241f7e4c1dc0c89d8e49

   {
   "business_platform": "PLATFORM_NAME",
   "external_business_id": "1238928921223",
   "version": "1.0",
   "timestamp": "1622474263939",
   "locale": "en",
   "industry": "cosmetics",
   "timezone": "UTC+0",
   "country_region": "CN",
   "store_name": "qq_testforbusinessaaaa",
   "phone_number": "1232132121232",
   "email": "[email protected]",
   "currency": "RMB",
   "website_url": "www.a.com/test12311sdas123",
   "domain": "https://aa.com",
   "state" :"someConvenientInfo"
   "hmac": "6afb803ad5bbe2be9dd09dc2bcc4513db1d6493dd214241f7e4c1dc0c89d8e49"
   }

const str = JSON.stringify(payloadInStep4);
const external_data = convertIntoBase64(str);