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.manager.GroupIdFormatException;
import org.asamk.signal.util.IOUtils;
import org.asamk.signal.util.Util;
import org.freedesktop.dbus.exceptions.DBusExecutionException;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

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

public class SendCommand implements DbusCommand {

    @Override
    public void attachToSubparser(final Subparser subparser) {
        subparser.addArgument("-g", "--group").help("Specify the recipient group ID.");
        subparser.addArgument("recipient").help("Specify the recipients' phone number.").nargs("*");
        subparser.addArgument("-m", "--message").help("Specify the message, if missing standard input is used.");
        subparser.addArgument("-a", "--attachment").nargs("*").help("Add file as attachment");
        subparser.addArgument("-e", "--endsession")
                .help("Clear session state and send end session message.")
                .action(Arguments.storeTrue());
    }

    @Override
    public int handleCommand(final Namespace ns, final Signal signal) {
        if (!signal.isRegistered()) {
            System.err.println("User is not registered.");
            return 1;
        }

        if ((ns.getList("recipient") == null || ns.getList("recipient").size() == 0) && (
                ns.getBoolean("endsession") || ns.getString("group") == null
        )) {
            System.err.println("No recipients given");
            System.err.println("Aborting sending.");
            return 1;
        }

        if (ns.getBoolean("endsession")) {
            try {
                signal.sendEndSessionMessage(ns.getList("recipient"));
                return 0;
            } catch (AssertionError e) {
                handleAssertionError(e);
                return 1;
            } catch (DBusExecutionException e) {
                System.err.println("Failed to send message: " + e.getMessage());
                return 1;
            }
        }

        String messageText = ns.getString("message");
        if (messageText == null) {
            try {
                messageText = IOUtils.readAll(System.in, Charset.defaultCharset());
            } catch (IOException e) {
                System.err.println("Failed to read message from stdin: " + e.getMessage());
                System.err.println("Aborting sending.");
                return 1;
            }
        }

        List<String> attachments = ns.getList("attachment");
        if (attachments == null) {
            attachments = new ArrayList<>();
        }

        try {
            if (ns.getString("group") != null) {
                byte[] groupId;
                try {
                    groupId = Util.decodeGroupId(ns.getString("group")).serialize();
                } catch (GroupIdFormatException e) {
                    handleGroupIdFormatException(e);
                    return 1;
                }

                long timestamp = signal.sendGroupMessage(messageText, attachments, groupId);
                System.out.println(timestamp);
                return 0;
            }
        } catch (AssertionError e) {
            handleAssertionError(e);
            return 1;
        } catch (DBusExecutionException e) {
            System.err.println("Failed to send message: " + e.getMessage());
            return 1;
        }

        try {
            long timestamp = signal.sendMessage(messageText, attachments, ns.getList("recipient"));
            System.out.println(timestamp);
            return 0;
        } catch (AssertionError e) {
            handleAssertionError(e);
            return 1;
        } catch (DBusExecutionException e) {
            System.err.println("Failed to send message: " + e.getMessage());
            return 1;
        }
    }
}