public class CommunitiesSelfRegistrationController {
    
    public String firstName {get; set;}
    public String lastName {get; set;}
    public String email {get; set;}
    public String password {get; set {password = value == null ? value : value.trim(); } }
    public String confirmPassword {get; set { confirmPassword = value == null ? value : value.trim(); } }
    //public String communityNickname {get; set { communityNickname = value == null ? value : value.trim(); } }
    public string employerCode {get;set;}
    public string SSNLast4 {get;set;}
    public boolean rendered {get;set;} 
    public CommunitiesSelfRegistrationController() {
        rendered = true;
        // Write the code to get employer code from Url as per the instruction from Doc.
        employerCode = apexpages.currentpage().getparameters().get('EmpCode');
        if((employerCode == null) || (employerCode == ' ')){
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'We were unable to verify your Registration, please contact your HR department.'));
            rendered = false;
        }
    }
    
    private boolean isValidPassword() {
        return password == confirmPassword;
    }
    
    public PageReference registerUser() {
        
        List<Account> accList = new List<Account>([Select id,name,Employer_Code__c,Community_PreVerification_Required__c from Account where Employer_Code__c =: apexpages.currentpage().getparameters().get('EmpCode') Limit 1]);
        if(!accList.isEmpty()){
            List<Contact> conList = new List<Contact>([Select id,FirstName,LastName,Email,account.Employer_Code__c,SSN_Last_4__c from Contact where SSN_Last_4__c =: SSNLast4 limit 1]);
            if(!conList.isEmpty()){
                String empCode = conList.get(0).account.Employer_Code__c;
                if(empCode == employerCode){
                    String userId = createCommunityUser(conList.get(0).Email,conList.get(0).Email,conList.get(0).FirstName,conList.get(0).LastName,conList.get(0).SSN_Last_4__c);
                    if (userId != null) { 
                        //String startUrl = 'https://comm1-hbgtools1.cs7.force.com/MyHealth';
                        //ApexPages.PageReference lgn = Site.login(email, password, startUrl);
                        PageReference pageRef = new PageReference('/apex/CommunitiesSelfRegConfirm');
                        pageRef.setRedirect(true);
                        return pageRef;
        			}
                }else{
                    ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, '"You already have an account to use the Community.  Please click “Already have an account?” on the Signup page to reset your password.'));
                    return null;
                }
            }else{
                if(!accList[0].Community_PreVerification_Required__c){
                    
                    String userId = createCommunityUser(email,email,firstName,lastName,SSNLast4);
                    
                    if (userId != null) { 
                        //String startUrl = 'https://comm1-hbgtools1.cs7.force.com/MyHealth';
                        //ApexPages.PageReference lgn = Site.login(email, password, startUrl);
                        PageReference pageRef = new PageReference('/apex/CommunitiesSelfRegConfirm');
                        pageRef.setRedirect(true);
                        return pageRef;
        			}
                    
                }else{
                    ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'We were unable to verify your Registration, please contact your HR department.'));
                }
            }
        }else{
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'We were unable to verify your Registration, please contact your HR department'));
        }
        return null;
    }
    public String createCommunityUser(String username, String email,String firstName,String lastName,String SSNLast4 ){
        
        // it's okay if password is null - we'll send the user a random password in that case
        if (!isValidPassword()) {
            ApexPages.Message msg = new ApexPages.Message(ApexPages.Severity.ERROR, Label.site.passwords_dont_match);
            ApexPages.addMessage(msg);
            return null;
        }    
        String profileId = null; // To be filled in by customer.
        String roleEnum = null; // To be filled in by customer.
        String accountId = null; // To be filled in by customer.
        //String userName = email;
        String nickname = email.substringBefore('@');
        User u = new User();
        u.Username = username;
        u.Email = email;
        u.FirstName = firstName;
        u.LastName = lastName;
        u.CommunityNickname = nickname;
        //u.ProfileId = profileId;
        u.Contact_SSN_Last_4__c = SSNLast4;
        String userId;
        try {
            userId = Site.createExternalUser(u, accountId, password);
            system.debug('userId::'+userId);
        } catch(Site.ExternalUserCreateException ex) {
            List<String> errors = ex.getDisplayMessages();
            for (String error : errors)  {
                ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, error));
            }
            System.debug(ex.getMessage());
        }
        return userId;
    }
}