import configuration.AntiSpamFilterConfiguration;
import configuration.MailAccountConfiguration;
import utils.FileUtils;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;

public class Main {

    private static final String WORDS_SPLITTER = ",";
    private static final String READ_USERNAME_COMMAND = "Mail account username: ";
    private static final String READ_PASSWORD_COMMAND = "Mail account password: ";
    private static final String READ_MAIL_SERVER_HOST_COMMAND = "Mail server host: ";

    public static void main(String[] args) throws IOException {
        initAntiSpamFilterConfiguration(args);
        initMailAccountConfiguration();

        AntiSpamThread antiSpamThread = new AntiSpamThread();
        antiSpamThread.start();
    }

    private static void initAntiSpamFilterConfiguration(String[] args) throws IOException {

        String blackListKeywordsSubjectFilePath = args[0];
        String blackListKeywordsBodyFilePath = args[1];
        String blackListAddressesFilePath = args[2];
        int maxFrequency = Integer.parseInt(args[3]);

        AntiSpamFilterConfiguration.INSTANCE.setBlackListKeywordsSubject(
                readWordListFromFile(blackListKeywordsSubjectFilePath));

        AntiSpamFilterConfiguration.INSTANCE.setBlackListKeywordsBody(
                readWordListFromFile(blackListKeywordsBodyFilePath)
        );

        AntiSpamFilterConfiguration.INSTANCE.setBlackListAddresses(
                readWordListFromFile(blackListAddressesFilePath)
        );

        AntiSpamFilterConfiguration.INSTANCE.setMaxMailsFromOneSenderPerMinute(maxFrequency);
    }

    private static List<String> readWordListFromFile(String filePath) throws IOException {
        return Arrays.asList(FileUtils.readFile(filePath)
                .split(WORDS_SPLITTER))
                .stream()
                .map(word -> word.toLowerCase())
                .collect(Collectors.toList());
    }

    private static void initMailAccountConfiguration() {
        Scanner scanner = new Scanner(System.in);

        System.out.println(READ_MAIL_SERVER_HOST_COMMAND);
        String host = scanner.nextLine();

        System.out.println(READ_USERNAME_COMMAND);
        String username = scanner.nextLine();

        System.out.println(READ_PASSWORD_COMMAND);
        String password = scanner.nextLine();

        MailAccountConfiguration.INSTANCE.setUsername(username);
        MailAccountConfiguration.INSTANCE.setPassword(password);
        MailAccountConfiguration.INSTANCE.setMailServerHost(host);
    }

}