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package org.apache.james.imap.encode;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Locale;

import org.apache.james.imap.api.ImapMessage;
import org.apache.james.imap.api.display.HumanReadableText;
import org.apache.james.imap.api.display.Locales;
import org.apache.james.imap.api.display.Localizer;
import org.apache.james.imap.api.process.ImapSession;
import org.apache.james.imap.encode.base.AbstractChainedImapEncoder;
import org.apache.james.imap.message.response.ContinuationResponse;

public class ContinuationResponseEncoder extends AbstractChainedImapEncoder {

    private final Localizer localizer;

    public ContinuationResponseEncoder(ImapEncoder next, final Localizer localizer) {
        super(next);
        this.localizer = localizer;
    }

    protected void doEncode(ImapMessage acceptableMessage, ImapResponseComposer composer, ImapSession session) throws IOException {

        ContinuationResponse response = (ContinuationResponse) acceptableMessage;
        final String message = response.getData() != null ? response.getData() : asString(response.getTextKey(), session);
        composer.continuationResponse(message);
    }

    private String asString(HumanReadableText text, ImapSession session) {
        // TODO: calculate locales
        return localizer.localize(text, new Locales(new ArrayList(), null));
    }

    protected boolean isAcceptable(ImapMessage message) {
        return (message instanceof ContinuationResponse);
    }

}