@Parameter value in WHERE clause (IF , CASE OR)

Transact-SQL
1

HI SQL Gurus,
I'm trying to pass the parameter value depends on the user choice i.e.
IF 1 Do WHERE X
IF 2 Do WHERE Y
IF 3 Do WHERE Z
use the following condition

 WHERE	SiteDeleted <> 1
--Active Contracts 
   AND 
 	( 
   	     (@ContractStatus	 = 1	AND tblContractSite.DateActive <= GetDate()  AND  (tblContractSite.DateInActive IS NULL OR tblContractSite.DateInActive > GetDate()))
--InActive Contracts
 
	OR (@ContractStatus      = 2    AND tblContractSite.DateInActive < GetDate())
--Active and InActive Contracts** 

	OR  (@ContractStatus	 = 3   AND 1=1)
 	)

Delare
@ContractStatus Int = 1,
So if the @ContractStatus =1 , use the condition its work fine
When I pass the @ContractStatus = 2 it doesn't work message prompt "Commands completed successfully"
When I pass the @ContractStatus = 3 it doesn't work either message prompt "Commands completed
It may be Bracketes/Paranthesis or making silly mistake.
Thanks for your help in advance
Regards
Farhan

2

Thanks for your help the above condition is working ,
The problem in my SQL above where I was declaring .. using @ContractStatus in declare section
Kind regards,