package fr.titionfire.ffsaf.ws;

import io.quarkus.runtime.annotations.RegisterForReflection;
import jakarta.enterprise.context.ApplicationScoped;
import jakarta.websocket.*;
import jakarta.websocket.server.PathParam;
import jakarta.websocket.server.ServerEndpoint;
import lombok.AllArgsConstructor;
import org.eclipse.microprofile.config.inject.ConfigProperty;
import org.jboss.logging.Logger;

import java.io.*;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

@ServerEndpoint("/api/ws/file/{code}")
@ApplicationScoped
public class FileSocket {
    private static final Logger logger = Logger.getLogger(FileSocket.class);
    public static Map<String, FileRecv> sessions = new ConcurrentHashMap<>();

    @ConfigProperty(name = "upload_dir")
    String media;

    /*@Scheduled(every = "10s")
    void increment() {
        sessions.forEach((key, value) -> {
            if (System.currentTimeMillis() - value.time > 60000) {
                closeAndDelete(value);
                if (value.session != null && value.session.isOpen()) {
                    try {
                        value.session.close(new CloseReason(CloseReason.CloseCodes.VIOLATED_POLICY, "Timeout"));
                    } catch (IOException e) {
                        StringWriter errors = new StringWriter();
                        e.printStackTrace(new PrintWriter(errors));
                        logger.error(errors.toString());
                    }
                }
                sessions.remove(key);
            }
        });
    }*/

    @OnOpen
    public void onOpen(Session session, @PathParam("code") String code) {
        try {
            if (sessions.containsKey(code)) {
                FileRecv fileRecv = sessions.get(code);
                fileRecv.file = new File(media + "-ext", "record/" + fileRecv.name);
                fileRecv.fos = new FileOutputStream(fileRecv.file, false);
                logger.info("Start reception of file: " + fileRecv.file.getAbsolutePath());
            } else {
                session.close(new CloseReason(CloseReason.CloseCodes.VIOLATED_POLICY, "File not found"));
            }
        } catch (IOException e) {
            StringWriter errors = new StringWriter();
            e.printStackTrace(new PrintWriter(errors));
            logger.error(errors.toString());
        }
    }

    @OnClose
    public void onClose(Session session, @PathParam("code") String code) {
        if (sessions.containsKey(code)) {
            FileRecv fileRecv = sessions.get(code);
            if (fileRecv.fos != null) {
                try {
                    fileRecv.fos.close();
                } catch (IOException e) {
                    StringWriter errors = new StringWriter();
                    e.printStackTrace(new PrintWriter(errors));
                    logger.error(errors.toString());
                }
            }
            logger.info("File received: " + fileRecv.file.getAbsolutePath());
            sessions.remove(code);
        }
    }

    @OnError
    public void onError(Session session, @PathParam("code") String code, Throwable throwable) {
        if (sessions.containsKey(code)) {
            closeAndDelete(sessions.get(code));
            sessions.remove(code);
        }
        logger.error("Error on file reception: " + throwable.getMessage());
    }


    @OnMessage
    public void onMessage(String message, @PathParam("code") String code) {
        if (message.equals("cancel")) {
            if (sessions.containsKey(code)) {
                closeAndDelete(sessions.get(code));
                sessions.remove(code);
            }
            logger.error("Error file " + code + " are cancel by the client");
        }
    }

    private void closeAndDelete(FileRecv fileRecv) {
        if (fileRecv.fos != null) {
            try {
                fileRecv.fos.close();
            } catch (IOException e) {
                StringWriter errors = new StringWriter();
                e.printStackTrace(new PrintWriter(errors));
                logger.error(errors.toString());
            }
        }
        if (fileRecv.file.exists()) {
            //noinspection ResultOfMethodCallIgnored
            fileRecv.file.delete();
        }
    }

    @OnMessage
    public void onMessage(byte[] data, @PathParam("code") String code) {
        if (sessions.containsKey(code)) {
            FileRecv fileRecv = sessions.get(code);
            try {
                fileRecv.fos.write(data);
            } catch (IOException e) {
                StringWriter errors = new StringWriter();
                e.printStackTrace(new PrintWriter(errors));
                logger.error(errors.toString());
            }
        }
    }

    @AllArgsConstructor
    @RegisterForReflection
    public static class FileRecv {
        Session session;
        String name;
        File file;
        FileOutputStream fos;
        long time;
    }
}