package com.onaro.util;

import java.util.Collections;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Set;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.onaro.sanscreen.client.SessionsHelper;
import com.onaro.sanscreen.server.license.data.LicenseInfo;
import com.onaro.sanscreen.server.license.rules.LicenseRuleType;
import com.onaro.sanscreen.server.license.sessions.LicenseSession;

// Should only be used by the About box.
// TODO: Move to About box class once no one else references it.
@Deprecated
public class LicenseUtil {
    
    static final Logger logger = LogManager.getLogger(LicenseUtil.class); 
    
    private static final Set<LicenseRuleType> licensedPackages;
    private static final Set<LicenseRuleType> unmodifiableLicensedPackages;
    
    static {
        Set<String> tempLicenseNames = new HashSet<String>();
        for (LicenseRuleType license : LicenseRuleType.values()) {
            if (license.isSoftwarePackage()) {
                tempLicenseNames.add(license.getLicenseName());
            }
        }
        licensedPackages = EnumSet.noneOf(LicenseRuleType.class);
        licensedPackages.addAll(getLicensedPackagesImpl());
        unmodifiableLicensedPackages = Collections.unmodifiableSet(licensedPackages);
    }
   
    /**
     * Get the set of package licenses that are enabled on the server.
     * @return the set of licenses, null if there was an error retrieving the packages.
     */
    public static Set<LicenseRuleType> getLicensedPackages() {
        return unmodifiableLicensedPackages;
    }
    
    private static Set<LicenseRuleType> getLicensedPackagesImpl() {
        Set<LicenseRuleType> licenses = new HashSet<LicenseRuleType>();
        /*
         * TODO: Re-enable this functionality when Packages are replaced with Features.
         *
        try {
            LicenseSession session = SessionsHelper.getInstance().getLicenseSession();
            licenses = session.getPackageLicensed();            
        } catch (Exception e) {
            logger.error("Failed to get license from server - " + e.getMessage(), e); //$NON-NLS-1$
        }
         */
        return licenses;
    }
    
    public static boolean isDemo() {
        LicenseInfo info = getLicenseInfo();
        
        return (info == null ? false : info.isDemo());
    }
    
    public static boolean showLicenseWarnings() {
        LicenseInfo info = getLicenseInfo();
        
        return (info == null ? false : info.isDisplayWarnings() && !info.getWarnings().isEmpty());
    }
    
    public static LicenseInfo getLicenseInfo() {
        LicenseInfo licenseInfo = null;
        try {
            LicenseSession session = SessionsHelper.getInstance().getLicenseSession();
            licenseInfo = session.getLicense();
        }
        catch (Exception e) {
            logger.error("Failed to get license from server - " + e.getMessage(), e); //$NON-NLS-1$
        }
        return licenseInfo;
    }
}