package org.litesoft.aokeyhole.swing.mains.mementobeans;

import java.io.*;

import org.litesoft.aokeyhole.persist.*;
import org.litesoft.aokeyhole.swing.mains.mementobeans.support.*;
import org.litesoft.commonfoundation.typeutils.*;
import org.litesoft.textfiledirectory.*;

public class DirectoryPackageSubSystemPersister implements SubSystemPersister
{
    private final BeanSubSystemState mState;

    public DirectoryPackageSubSystemPersister( String pName, String pDirectory, String pPackage )
    {
        pPackage = Strings.assertNotNullNotEmpty( "Package", pPackage );
        File zDirectory = new File( Strings.assertNotNullNotEmpty( "Directory", pDirectory ) );
        if ( !zDirectory.isDirectory() )
        {
            throw new IllegalArgumentException( "Not a Directory: " + pDirectory );
        }
        mState = new BeanSubSystemState( pName, pPackage,
                                         new TextFileDirectoryFileSystem( new File( zDirectory,
                                                                                    validatePackageAndConvertToSubDirPath( pPackage ) ) ) //
        );
    }

    private String validatePackageAndConvertToSubDirPath( String pPackage )
    {
        int zAt = pPackage.indexOf( '.' );
        if ( (zAt < 1) || pPackage.endsWith( "." ) )
        {
            if ( Strings.isAsciiIdentifier( pPackage ) )
            {
                return pPackage;
            }
            throw new IllegalArgumentException( "Illegal Package: " + pPackage );
        }
        int zFrom = 0;
        StringBuilder sb = new StringBuilder();
        do
        {
            sb.append( assertPackageFragmentIdentifier( pPackage, zFrom, pPackage.substring( zFrom, zAt ) ) ).append( '/' );
            zFrom = zAt + 1;
        }
        while ( -1 != (zAt = pPackage.indexOf( '.', zFrom )) );
        sb.append( assertPackageFragmentIdentifier( pPackage, zFrom, pPackage.substring( zFrom ) ) );
        return sb.toString();
    }

    private String assertPackageFragmentIdentifier( String pPackage, int pFrom, String pIdentifierCandidate )
    {
        if ( Strings.isAsciiIdentifier( pIdentifierCandidate ) )
        {
            return pIdentifierCandidate;
        }
        throw new IllegalArgumentException( "Illegal Package (starting at char " + (pFrom + 1) + "): " + pPackage );
    }

    @Override
    public String getName()
    {
        return mState.getName();
    }

    @Override
    public boolean isReadOnly()
    {
        return false;
    }

    @Override
    public SubSystemReader getReader( String pVersion )
            throws IOException
    {
        return new BeanSubSystemReader( mState );
    }

    @Override
    public SubSystemBuilder getBuilder( String pVersion, String pKeyHoleVersion )
    {
        return new BeanSubSystemBuilder( mState );
    }
}