package org.asamk.signal.commands;

import net.sourceforge.argparse4j.impl.Arguments;
import net.sourceforge.argparse4j.inf.Namespace;
import net.sourceforge.argparse4j.inf.Subparser;

import org.asamk.Signal;
import org.asamk.signal.JsonReceiveMessageHandler;
import org.asamk.signal.JsonWriter;
import org.asamk.signal.OutputType;
import org.asamk.signal.PlainTextWriterImpl;
import org.asamk.signal.ReceiveMessageHandler;
import org.asamk.signal.json.JsonMessageEnvelope;
import org.asamk.signal.manager.Manager;
import org.asamk.signal.util.DateUtils;
import org.freedesktop.dbus.connections.impl.DBusConnection;
import org.freedesktop.dbus.exceptions.DBusException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.Base64;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import static org.asamk.signal.util.ErrorUtils.handleAssertionError;

public class ReceiveCommand implements ExtendedDbusCommand, LocalCommand {

    private final static Logger logger = LoggerFactory.getLogger(ReceiveCommand.class);

    @Override
    public void attachToSubparser(final Subparser subparser) {
        subparser.addArgument("-t", "--timeout")
                .type(double.class)
                .help("Number of seconds to wait for new messages (negative values disable timeout)");
        subparser.addArgument("--ignore-attachments")
                .help("Don’t download attachments of received messages.")
                .action(Arguments.storeTrue());
        subparser.addArgument("--json")
                .help("WARNING: This parameter is now deprecated! Please use the global \"--output=json\" option instead.\n\nOutput received messages in json format, one json object per line.")
                .action(Arguments.storeTrue());
    }

    @Override
    public Set<OutputType> getSupportedOutputTypes() {
        return Set.of(OutputType.PLAIN_TEXT, OutputType.JSON);
    }

    public int handleCommand(final Namespace ns, final Signal signal, DBusConnection dbusconnection) {
        var inJson = ns.get("output") == OutputType.JSON || ns.getBoolean("json");

        // TODO delete later when "json" variable is removed
        if (ns.getBoolean("json")) {
            logger.warn("\"--json\" option has been deprecated, please use the global \"--output=json\" instead.");
        }

        try {
            if (inJson) {
                final var jsonWriter = new JsonWriter(System.out);

                dbusconnection.addSigHandler(Signal.MessageReceived.class, messageReceived -> {
                    var envelope = new JsonMessageEnvelope(messageReceived);
                    final var object = Map.of("envelope", envelope);
                    try {
                        jsonWriter.write(object);
                    } catch (IOException e) {
                        logger.error("Failed to write json object: {}", e.getMessage());
                    }
                });

                dbusconnection.addSigHandler(Signal.ReceiptReceived.class, receiptReceived -> {
                    var envelope = new JsonMessageEnvelope(receiptReceived);
                    final var object = Map.of("envelope", envelope);
                    try {
                        jsonWriter.write(object);
                    } catch (IOException e) {
                        logger.error("Failed to write json object: {}", e.getMessage());
                    }
                });

                dbusconnection.addSigHandler(Signal.SyncMessageReceived.class, syncReceived -> {
                    var envelope = new JsonMessageEnvelope(syncReceived);
                    final var object = Map.of("envelope", envelope);
                    try {
                        jsonWriter.write(object);
                    } catch (IOException e) {
                        logger.error("Failed to write json object: {}", e.getMessage());
                    }
                });
            } else {
                final var writer = new PlainTextWriterImpl(System.out);

                dbusconnection.addSigHandler(Signal.MessageReceived.class, messageReceived -> {
                    try {
                        writer.println("Envelope from: {}", messageReceived.getSender());
                        writer.println("Timestamp: {}", DateUtils.formatTimestamp(messageReceived.getTimestamp()));
                        writer.println("Body: {}", messageReceived.getMessage());
                        if (messageReceived.getGroupId().length > 0) {
                            writer.println("Group info:");
                            writer.indentedWriter()
                                    .println("Id: {}",
                                            Base64.getEncoder().encodeToString(messageReceived.getGroupId()));
                        }
                        if (messageReceived.getAttachments().size() > 0) {
                            writer.println("Attachments:");
                            for (var attachment : messageReceived.getAttachments()) {
                                writer.println("- Stored plaintext in: {}", attachment);
                            }
                        }
                        writer.println();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                });

                dbusconnection.addSigHandler(Signal.ReceiptReceived.class, receiptReceived -> {
                    try {
                        writer.println("Receipt from: {}", receiptReceived.getSender());
                        writer.println("Timestamp: {}", DateUtils.formatTimestamp(receiptReceived.getTimestamp()));
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                });

                dbusconnection.addSigHandler(Signal.SyncMessageReceived.class, syncReceived -> {
                    try {
                        writer.println("Sync Envelope from: {} to: {}",
                                syncReceived.getSource(),
                                syncReceived.getDestination());
                        writer.println("Timestamp: {}", DateUtils.formatTimestamp(syncReceived.getTimestamp()));
                        writer.println("Body: {}", syncReceived.getMessage());
                        if (syncReceived.getGroupId().length > 0) {
                            writer.println("Group info:");
                            writer.indentedWriter()
                                    .println("Id: {}", Base64.getEncoder().encodeToString(syncReceived.getGroupId()));
                        }
                        if (syncReceived.getAttachments().size() > 0) {
                            writer.println("Attachments:");
                            for (var attachment : syncReceived.getAttachments()) {
                                writer.println("- Stored plaintext in: {}", attachment);
                            }
                        }
                        writer.println();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                });
            }
        } catch (DBusException e) {
            e.printStackTrace();
            return 2;
        }
        while (true) {
            try {
                Thread.sleep(10000);
            } catch (InterruptedException e) {
                return 0;
            }
        }
    }

    @Override
    public int handleCommand(final Namespace ns, final Manager m) {
        var inJson = ns.get("output") == OutputType.JSON || ns.getBoolean("json");

        // TODO delete later when "json" variable is removed
        if (ns.getBoolean("json")) {
            logger.warn("\"--json\" option has been deprecated, please use the global \"--output=json\" instead.");
        }

        double timeout = 5;
        if (ns.getDouble("timeout") != null) {
            timeout = ns.getDouble("timeout");
        }
        var returnOnTimeout = true;
        if (timeout < 0) {
            returnOnTimeout = false;
            timeout = 3600;
        }
        boolean ignoreAttachments = ns.getBoolean("ignore_attachments");
        try {
            final var handler = inJson ? new JsonReceiveMessageHandler(m) : new ReceiveMessageHandler(m);
            m.receiveMessages((long) (timeout * 1000),
                    TimeUnit.MILLISECONDS,
                    returnOnTimeout,
                    ignoreAttachments,
                    handler);
            return 0;
        } catch (IOException e) {
            System.err.println("Error while receiving messages: " + e.getMessage());
            return 3;
        } catch (AssertionError e) {
            handleAssertionError(e);
            return 1;
        }
    }
}