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const {  args,} = Deno;
const sendgridUri = "https://api.sendgrid.com/v3/mail/send";
export interface IOptions {  apiKey: string;}
export interface IResult {  success: boolean;  errors?: string[];}
export interface IAddress {  email: string;  name?: string;}
export interface IContent {  type: string;  value: string;}
export interface IAttachment {  content: string;  filename: string;  type?: string;  disposition?: string;  contentId?: string;}
export interface IPersonalization {  to: IAddress[];  cc?: IAddress[];  bcc?: IAddress[];  subject: string;  substitutions?: any;  customArgs?: any;  dynamicTemplateData?: any;  headers?: any;}
export interface IRequestBody {  personalizations: IPersonalization[];  from: IAddress;  replyTo?: IAddress;  content: IContent[];  attachments?: IAttachment[];  templateId?: string;  headers?: any;  sections?: any;  categories?: string[];  customArgs?: any;  sendAt?: number;  batchId?: string;  ipPoolName?: string;  asm?: {    groupId: number;    groupsToDisplay: number[];  };  mailSettings?: {    bcc?: {      enable?: boolean;      email?: string;    };    bypassListManagement?: {      enable?: boolean;    };    footer?: {      enable?: boolean;      text?: string;      html?: string;    };    sandboxMode?: {      enable?: boolean;    };    spamCheck?: {      enable?: boolean;      threshold?: number;      postToUrl?: string;    };  };  //trackingSettings?}
export interface ISimpleRequestBody {  to: IAddress[];  cc?: IAddress[];  bcc?: IAddress[];  subject: string;  from: IAddress;  replyTo?: IAddress;  content: IContent[];  attachments?: IAttachment[];  templateId?: string;  dynamicTemplateData?: any;}
//// Some keys shouldn't be snake cased.  These are those.//function isImmune(key: string): boolean {  switch (key) {    case "dynamicTemplateData":    case "customArgs":    case "headers":    case "sections":      return true;    default:      return false;  }}
function snakeCaseString(str: string): string {  let result = str;
  let matches = str.match(    /[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g,  );  if (matches && matches.length) {    matches = matches.map((x: string) => {      return x.toLowerCase();    });    result = matches.join("_");  }  return result;}
// function isAny(toBeDetermined: PersonOrAnimal): toBeDetermined is Animal {//   if((toBeDetermined as Animal).type){//     return true//   }//   return false// }// view raw
function snakeCaseObject(obj: any): any {  if (Array.isArray(obj)) {    return obj.map(function (val, key) {      return (typeof val === "object") ? snakeCaseObject(val) : val;    });  } else if (typeof obj === "object") {    var res: any = {};    for (var key in obj) {      var val = obj[key];      if (typeof val === "object") {        res[snakeCaseString(key)] = isImmune(key) ? val : snakeCaseObject(val);      } else {        res[snakeCaseString(key)] = val;      }    }    return res;  } else {    return obj;  }}
export const sendSimpleMail = async (  requestBody: ISimpleRequestBody,  options: IOptions,): Promise<IResult> => {  let mail: IRequestBody = {    personalizations: [{      to: requestBody.to,      cc: requestBody.cc,      bcc: requestBody.bcc,      subject: requestBody.subject,      dynamicTemplateData: requestBody.dynamicTemplateData,    }],    from: requestBody.from,    replyTo: requestBody.replyTo,    content: requestBody.content,    attachments: requestBody.attachments,    templateId: requestBody.templateId,  };
  return sendMail(mail, options);};
export const sendMail = async (  requestBody: IRequestBody,  options: IOptions,): Promise<IResult> => {  let mail = snakeCaseObject(requestBody);  let json = JSON.stringify(mail);
  const response = await fetch(sendgridUri, {    method: "POST",    headers: {      "authorization": `Bearer ${options.apiKey}`,      "content-type": "application/json",    },    body: json,  });
  let result: IResult = {    success: true,  };
  //  // This will cause an exception from SendGrid, because SendGrid returns an  // empty JSON body.  However, if you don't call it, you'll leak a resource  // that doesn't appear to have a close().  //  try {    let responseBody = await response.json();    if (responseBody) {      result.success = false;      result.errors = responseBody.errors;    }  } catch (ex) {}
  return result;};