import { RegExpUtility } from "../../../browser/text/RegExpUtitlity";
import { CryptIO } from "../../crypt/CryptIO";
import { RJLog } from "../../log/RJLog";
import { RequestHandler, RequestType } from "../RequestHandler";
import { FastifyRequest, FastifyReply } from 'fastify';
import { VariableReplacer, Variables } from "../../../browser/text/replacing/VariableReplacer";
import { ConfirmSignUpHandler } from "./confirm-signup";

export class SignUpHandler extends RequestHandler
{
  static url = "/signup";
  constructor(){ super( RequestType.POST, SignUpHandler.url ); }

  static USER_NAME = "USER_NAME";
  static CONFIRMATION_LINK = "CONFIRMATION_LINK";

  static EMAIL_TITLE = "You signed up";
  static EMAIL_MESSAGE = 
  `
    <b>Hi {{${SignUpHandler.USER_NAME}}}!</b>
    <br>
    Please confirm your signup by clicking the link:
    <br>
    <a href="{{${SignUpHandler.CONFIRMATION_LINK}}}">SIGN UP CONFIRMATION</a>
    <br>
    <br>
    Cheers!
  
  `

  async _handle( request:FastifyRequest, reply:FastifyReply )
  {    
    let requestBody = request.body;
    
    let { email, password, userName } = requestBody as { email: string; password: string; userName: string };

    if ( ! email || ! password )
    { 
      return this.sendError( "Missing email or password:" + `"${requestBody}"` );
    }

    let emailInUse = await this.userDB.hasUserWithEmail( email );

    if ( emailInUse )
    {
      return this.sendError( "User already exists" );
    }

    let userData = await this.userDB.byEmail( email );
    
    if ( userData == null )
    {
      userData = await this.userDB.signUp( email, password, userName );
    }
   
    let token = await this.userDB.createSignUpConfirmation( userData, this.ip );

    let confirmationURL = this._ums._settings.url + ConfirmSignUpHandler.url; 

    let id = userData.id;

    let link = `${confirmationURL}?id=${id}&token=${token.id}`;

    await this.sendEmail( email, userName, link );


    return this.sendInfo( "User created, email sent" );
  }

  async sendEmail( email:string, userName:string, link:string ):Promise<void>
  {    

    let variables:Variables = { 
      [ SignUpHandler.USER_NAME ] : userName,
      [ SignUpHandler.CONFIRMATION_LINK ] : link     
    };

    let message = VariableReplacer.replace( SignUpHandler.EMAIL_MESSAGE, variables, "{{", "}}" );
    let title = VariableReplacer.replace( SignUpHandler.EMAIL_TITLE, variables, "{{", "}}" ); 
    
    await this._ums.sendEmail( email,title, message );
    
    return Promise.resolve();
  }



  

}