/*
  Copyright (C) 2015-2021 AsamK and contributors

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.asamk.signal;

import net.sourceforge.argparse4j.ArgumentParsers;
import net.sourceforge.argparse4j.impl.Arguments;
import net.sourceforge.argparse4j.inf.ArgumentParser;
import net.sourceforge.argparse4j.inf.ArgumentParserException;
import net.sourceforge.argparse4j.inf.MutuallyExclusiveGroup;
import net.sourceforge.argparse4j.inf.Namespace;
import net.sourceforge.argparse4j.inf.Subparser;
import net.sourceforge.argparse4j.inf.Subparsers;

import org.asamk.signal.commands.Command;
import org.asamk.signal.commands.Commands;
import org.asamk.signal.manager.LibSignalLogger;
import org.asamk.signal.util.SecurityProvider;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;

import java.security.Security;
import java.util.Map;

public class Main {

    public static void main(String[] args) {
        installSecurityProviderWorkaround();

        // Configuring the logger needs to happen before any logger is initialized
        if (isVerbose(args)) {
            System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "debug");
            System.setProperty("org.slf4j.simpleLogger.showThreadName", "true");
            System.setProperty("org.slf4j.simpleLogger.showShortLogName", "false");
            System.setProperty("org.slf4j.simpleLogger.showDateTime", "true");
            System.setProperty("org.slf4j.simpleLogger.dateTimeFormat", "yyyy-MM-dd'T'HH:mm:ss.SSSXX");
            LibSignalLogger.initLogger();
        } else {
            System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "info");
            System.setProperty("org.slf4j.simpleLogger.showThreadName", "false");
            System.setProperty("org.slf4j.simpleLogger.showShortLogName", "true");
            System.setProperty("org.slf4j.simpleLogger.showDateTime", "false");
        }

        Namespace ns = parseArgs(args);
        if (ns == null) {
            System.exit(1);
        }

        int res = new Cli(ns).init();
        System.exit(res);
    }

    private static void installSecurityProviderWorkaround() {
        // Register our own security provider
        Security.insertProviderAt(new SecurityProvider(), 1);
        Security.addProvider(new BouncyCastleProvider());
    }

    private static boolean isVerbose(String[] args) {
        ArgumentParser parser = buildBaseArgumentParser();

        Namespace ns;
        try {
            ns = parser.parseKnownArgs(args, null);
        } catch (ArgumentParserException e) {
            return false;
        }

        return ns.getBoolean("verbose");
    }

    private static Namespace parseArgs(String[] args) {
        ArgumentParser parser = buildArgumentParser();

        Namespace ns;
        try {
            ns = parser.parseArgs(args);
        } catch (ArgumentParserException e) {
            parser.handleError(e);
            return null;
        }

        if ("link".equals(ns.getString("command"))) {
            if (ns.getString("username") != null) {
                parser.printUsage();
                System.err.println("You cannot specify a username (phone number) when linking");
                System.exit(2);
            }
        } else if (!ns.getBoolean("dbus") && !ns.getBoolean("dbus_system")) {
            if (ns.getString("username") == null) {
                parser.printUsage();
                System.err.println("You need to specify a username (phone number)");
                System.exit(2);
            }
            if (!PhoneNumberFormatter.isValidNumber(ns.getString("username"), null)) {
                System.err.println("Invalid username (phone number), make sure you include the country code.");
                System.exit(2);
            }
        }

        if (ns.getList("recipient") != null && !ns.getList("recipient").isEmpty() && ns.getString("group") != null) {
            System.err.println("You cannot specify recipients by phone number and groups at the same time");
            System.exit(2);
        }

        return ns;
    }

    private static ArgumentParser buildArgumentParser() {
        ArgumentParser parser = buildBaseArgumentParser();

        Subparsers subparsers = parser.addSubparsers()
                .title("subcommands")
                .dest("command")
                .description("valid subcommands")
                .help("additional help");

        final Map<String, Command> commands = Commands.getCommands();
        for (Map.Entry<String, Command> entry : commands.entrySet()) {
            Subparser subparser = subparsers.addParser(entry.getKey());
            entry.getValue().attachToSubparser(subparser);
        }

        return parser;
    }

    private static ArgumentParser buildBaseArgumentParser() {
        ArgumentParser parser = ArgumentParsers.newFor("signal-cli")
                .build()
                .defaultHelp(true)
                .description("Commandline interface for Signal.")
                .version(BaseConfig.PROJECT_NAME + " " + BaseConfig.PROJECT_VERSION);

        parser.addArgument("-v", "--version").help("Show package version.").action(Arguments.version());
        parser.addArgument("--verbose")
                .help("Raise log level and include lib signal logs.")
                .action(Arguments.storeTrue());
        parser.addArgument("--config")
                .help("Set the path, where to store the config (Default: $XDG_DATA_HOME/signal-cli , $HOME/.local/share/signal-cli).");

        MutuallyExclusiveGroup mut = parser.addMutuallyExclusiveGroup();
        mut.addArgument("-u", "--username").help("Specify your phone number, that will be used for verification.");
        mut.addArgument("--dbus").help("Make request via user dbus.").action(Arguments.storeTrue());
        mut.addArgument("--dbus-system").help("Make request via system dbus.").action(Arguments.storeTrue());

        parser.addArgument("-o", "--output")
                .help("Choose to output in plain text or JSON")
                .choices("plain-text", "json")
                .setDefault("plain-text");

        return parser;
    }
}