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package com.firefly.net.tcp;

import com.firefly.net.Session;
import com.firefly.net.tcp.aio.AsynchronousTcpServer;
import com.firefly.net.tcp.ssl.SSLSession;
import com.firefly.utils.function.Action0;
import com.firefly.utils.function.Action1;
import com.firefly.utils.function.Action2;
import com.firefly.utils.function.Func1;
import com.firefly.utils.lang.AbstractLifeCycle;

import java.util.List;

public class SimpleTcpServer extends AbstractLifeCycle {

    // accept TCP connection callback
    private Action1 accept;
    private Action2 failedAcceptance;

    private AsynchronousTcpServer server;
    private TcpServerConfiguration config;

    public SimpleTcpServer() {
        this(new TcpServerConfiguration());
    }

    public SimpleTcpServer(TcpServerConfiguration config) {
        this.config = config;
        server = new AsynchronousTcpServer(config);
    }

    public SimpleTcpServer accept(Action1 accept) {
        this.accept = accept;
        return this;
    }

    public SimpleTcpServer accept(Action1 accept, Action2 failed) {
        this.accept = accept;
        this.failedAcceptance = failed;
        return this;
    }

    public void listen(String host, int port) {
        config.setHost(host);
        config.setPort(port);
        start();
    }

    public abstract class AbstractHandler extends AbstractSimpleHandler {

        @Override
        public void failedAcceptingSession(Integer sessionId, Throwable t) throws Throwable {
            if (failedAcceptance != null) {
                failedAcceptance.call(sessionId, t);
            }
        }

    }

    @Override
    protected void init() {
        if (!config.isSecureConnectionEnabled()) {
            config.setDecoder(AbstractSimpleHandler.decoder);
            config.setHandler(new AbstractHandler() {

                @Override
                public void sessionOpened(Session session) throws Throwable {
                    TcpConnectionImpl c = new TcpConnectionImpl(session);
                    session.attachObject(c);
                    if (accept != null) {
                        accept.call(c);
                    }
                }

            });
        } else {
            config.setDecoder(AbstractSimpleHandler.sslDecoder);
            config.setHandler(new AbstractHandler() {

                @Override
                public void sessionOpened(Session session) throws Throwable {
                    session.attachObject(new SecureTcpConnectionImpl(session,
                            new SSLSession(config.getSslContextFactory(), false, session, (ssl) -> {
                                Object o = session.getAttachment();
                                if (o != null && o instanceof SecureTcpConnectionImpl) {
                                    SecureTcpConnectionImpl c = (SecureTcpConnectionImpl) o;
                                    if (accept != null) {
                                        accept.call(c);
                                    }
                                }
                            })));
                }

                @Override
                public void sessionClosed(Session session) throws Throwable {
                    super.sslSessionClosed(session);
                }

            });
        }
        server.listen(config.getHost(), config.getPort());
    }

    @Override
    protected void destroy() {
        server.stop();
    }

}