public with sharing class SearchController{

public integer PageSize {get;set;}
public integer PageNumber {get;set;}
public integer RecordCount {get;set;}
public List<contactwrapper> objAWList {get;set;}
private Set<id> selectedContactIds;
public boolean displayPopup {get; set;}
public List<contact> objSelectedContacts {get; set;}
private String soql {get;set;}

public SearchController() {
    PageSize = 10;
    PageNumber = 1;
    RecordCount = 0;
    selectedContactIds = new Set<id>();
    objAWList = new List<contactwrapper>();
    objSelectedContacts = new List<contact>();

}


public void closePopup() {
    displayPopup = false;
}


public void showPopup() {
    setSelectedContacts();
    displayPopup = true;
    objSelectedContacts  = GetSelectedcontacts();
}

public Integer getSelectedCount(){
    return this.selectedContactIds.size();
}

public List<contact> GetSelectedContacts(){
    List<contact> objConList = [Select Id, Name,Email,Account.Name,Account_Cust__c,Job_Title__c
                                From Contact Where ID IN : selectedContactIds];
    system.debug('objConList :'+objConList);
    return objConList;
}


private void setSelectedContacts()
{
    for(contactwrapper item: objAWList)
    {
        if(item.IsSelected)
        {
            if(!this.selectedContactIds.contains(item.ContactId))
            {
                this.selectedContactIds.add(item.ContactId);
            }
        }
        else
        {
            if(this.selectedContactIds.contains(item.ContactId))
            {
                this.selectedContactIds.remove(item.ContactId);
            }
        }
    }
}

public integer PageIndex {
    get { return (PageNumber - 1); }
}

public integer PageCount {
    get { return getPageCount(); }
}

public integer Offset {
    get { return (PageSize * PageIndex); }
}


public void runSearch() {
    objAWList = new List<contactwrapper>();
    try {
            List<Contact> objConList = new List<Contact>();
            String contactName = Apexpages.currentPage().getParameters().get('ContactName');

            if (!contactName.equals('')){
                soql = 'select firstname, lastname, Name,account.name,Job_Title__c,Account_Cust__c from contact where account.name != null';
                soql += ' and name LIKE '%' + contactName + '%'';
                soql += ' order by firstName ASC limit '+PageSize +' offset '+Offset;
                system.debug('soqlfinal::'+soql);
                objConList = Database.query(soql);
                RecordCount = objConList.size();

            }else if(contactName.equals('')){
                RecordCount = objConList.size();
                objConList.clear();
            }

             system.debug('objConList---'+objConList);
             if(!objConList.isEmpty()){
                 for(Contact Con : objConList){
                        ContactWrapper objAW = new ContactWrapper();
                        objAW.ContactId = Con.Id;
                        objAW.ContactName = Con.Name;
                        objAW.AccountCust= Con.Account_Cust__c ;
                        objAW.JobTitle= Con.Job_Title__c;

                        if(this.selectedContactIds.contains(con.Id)){
                            objAW.IsSelected = true;
                        }
                        else{
                            objAW.IsSelected = false;
                        }
                        objAWList.Add(objAW);
                 }
             }

    }
    catch (QueryException e) {
        ApexPages.addMessages(e);

    }
}

public integer LNumber {
    get { return RecordCount == 0 ? 0 : (Offset + 1); }
}

public integer UNumber {
    get {
        integer iUNum = ((LNumber + PageSize) - 1);
        return (iUnum > RecordCount) ? RecordCount : iUNum;
    }
}

public boolean AllowMoveNext {
    get{ return ((PageIndex + 1) < PageCount); } } public boolean AllowMovePrev { get{ return (PageIndex > 0); }
}

public void Prev() {
    setSelectedContacts();
    PageNumber--;

    if (PageNumber <= 0) { PageNumber = 1; } } public void Next() { setSelectedContacts(); PageNumber++; if (PageNumber > PageCount) {
        PageNumber = PageCount;
    }
}

public void Last() {
    setSelectedContacts();
    PageNumber = PageCount;
}

public void First() {
    setSelectedContacts();
    PageNumber = 1;
}

private integer getPageCount() {
    integer iPageCount = 1;

    if (RecordCount != 0 && PageSize != 0) {
        iPageCount = (RecordCount/PageSize) + ((Math.mod(RecordCount, PageSize)) > 0 ? 1 : 0);
    }
    return iPageCount;
}

public class Contactwrapper
{
    public Id ContactId {get;set;}
    public String ContactName {get;set;}
    public String AccountCust {get;set;}
    public String JobTitle {get;set;}
    public Boolean IsSelected{get;set;}
    public Contactwrapper()
    {

    }
}
}