/*
 * Copyright (C) 2020 Christian Pierre MOMON <christian@momon.org>
 * 
 * This file is part of StatoolInfos, simple service statistics tool.
 * 
 * StatoolInfos is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * StatoolInfos 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with StatoolInfos.  If not, see <http://www.gnu.org/licenses/>.
 */
package fr.devinsy.statoolinfos.core;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Iterator;
import java.util.Locale;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import fr.devinsy.strings.StringList;
import fr.devinsy.strings.StringsUtils;

/**
 * The Class StatoolInfosUtils.
 */
public class StatoolInfosUtils
{
    private static Logger logger = LoggerFactory.getLogger(StatoolInfosUtils.class);

    public static final DateTimeFormatter PATTERN_SHORTDATE = DateTimeFormatter.ofPattern("dd/MM/yyyy", Locale.FRANCE);
    public static final DateTimeFormatter PATTERN_LONGDATE = DateTimeFormatter.ofPattern("dd/MM/yyyy HH':'mm", Locale.FRANCE);

    /**
     * Builds the technical name.
     *
     * @return the string
     */
    public static String buildTechnicalName(final String source)
    {
        String result;

        if (source == null)
        {
            result = null;
        }
        else
        {
            result = source.toLowerCase().replaceAll("[^a-z_0-9]", "");
        }

        //
        return result;
    }

    /**
     * Copy ressource.
     *
     * @param source
     *            the source
     * @param target
     *            the target directory
     * @throws IOException
     */
    public static void copyRessource(final String source, final File target) throws IOException
    {
        URL url = StatoolInfosUtils.class.getResource(source);

        File finalTarget;
        if (target.isDirectory())
        {
            String fileName = FilenameUtils.getName(source);
            finalTarget = new File(target, fileName);
        }
        else
        {
            finalTarget = target;
        }

        FileUtils.copyURLToFile(url, finalTarget);
    }

    /**
     * Generate cat logo.
     *
     * @param seed
     *            the seed
     * @param target
     *            the target
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public static void generateCatLogo(final String seed, final File target) throws IOException
    {
        URL source = new URL("https://www.peppercarrot.com/extras/html/2016_cat-generator/avatar.php?seed=" + seed);

        FileUtils.copyURLToFile(source, target);
    }

    /**
     * Gets the current time in long format.
     * 
     * @return the long
     */
    public static long now()
    {
        return new Date().getTime();
    }

    /**
     * To human long.
     *
     * @param value
     *            the value
     * @return the string
     */
    public static String toHumanLong(final LocalDateTime value)
    {
        String result;

        result = toHumanLong(value, null);

        //
        return result;
    }

    /**
     * To human long.
     *
     * @param value
     *            the value
     * @param defaultValue
     *            the default value
     * @return the string
     */
    public static String toHumanLong(final LocalDateTime value, final String defaultValue)
    {
        String result;

        if (value == null)
        {
            result = null;
        }
        else
        {
            result = value.format(PATTERN_LONGDATE);
        }

        //
        return result;
    }

    /**
     * To human short.
     *
     * @param value
     *            the value
     * @return the string
     */
    public static String toHumanShort(final LocalDateTime value)
    {
        String result;

        result = toHumanShort(value, null);

        //
        return result;
    }

    /**
     * To human short.
     *
     * @param value
     *            the value
     * @param defaultValue
     *            the default value
     * @return the string
     */
    public static String toHumanShort(final LocalDateTime value, final String defaultValue)
    {
        String result;

        if (value == null)
        {
            result = null;
        }
        else
        {
            result = value.format(PATTERN_SHORTDATE);
        }

        //
        return result;
    }

    public static Integer toInteger(final String value)
    {
        Integer result;

        if ((value == null) || (!NumberUtils.isDigits(value)))
        {
            result = null;
        }
        else
        {
            result = Integer.parseInt(value);
        }

        //
        return result;
    }

    /**
     * To Json numbers.
     *
     * @param source
     *            the source
     * @return the string
     */
    public static String toJSonNumbers(final StringList source)
    {
        String result;

        result = StringsUtils.toString(source, "[", ",", "]");

        //
        return result;
    }

    /**
     * To J son numbers.
     *
     * @param labels
     *            the labels
     * @param values
     *            the source
     * @return the string
     */
    public static String toJSonNumbers(final StringList labels, final StringList values)
    {
        String result;

        Iterator<String> labelIterator = labels.iterator();
        Iterator<String> valueIterator = values.iterator();

        StringList buffer = new StringList();
        while (labelIterator.hasNext())
        {
            String label = labelIterator.next();
            String value = valueIterator.next();

            // buffer.append("{t: new Date('" + label + "'), y: " + value +
            // "}");
            buffer.append("{t: '" + label + "', y: " + value + "}");
        }
        result = StringsUtils.toString(buffer, "[", ",", "]");

        //
        return result;
    }

    /**
     * To Json strings.
     *
     * @param source
     *            the source
     * @return the string
     */
    public static String toJSonStrings(final StringList source)
    {
        String result;

        StringList target = new StringList();

        target.append("[");
        for (String string : source)
        {
            target.append("'");
            target.append(string);
            target.append("'");
            target.append(",");
        }
        target.removeLast();
        target.append("]");

        result = target.toString();

        //
        return result;
    }

    /**
     * To technical name.
     *
     * @param source
     *            the source
     * @return the string
     */
    public static String toTechnicalName(final String source)
    {
        String result;

        if (source == null)
        {
            result = null;
        }
        else
        {
            result = StringUtils.stripAccents(source).replaceAll("[^A-Za-z0-9]+", "");
        }

        //
        return result;
    }

    /**
     * To year week.
     *
     * @param source
     *            the source
     * @return the string
     */
    public static String toYearWeek(final LocalDate source)
    {
        String result;

        if (source == null)
        {
            result = null;
        }
        else
        {
            result = source.format(DateTimeFormatter.ofPattern("YYYYww", Locale.FRANCE));
        }

        //
        return result;
    }

    /**
     * Unactivate SSL check.
     */
    public static void unactivateSSLCheck()
    {
        // Create a trust manager that does not validate certificate chains.
        TrustManager[] trustAllCerts = new TrustManager[] {
                new X509TrustManager()
                {
                    @Override
                    public void checkClientTrusted(final java.security.cert.X509Certificate[] certs, final String authType)
                    {
                    }

                    @Override
                    public void checkServerTrusted(final java.security.cert.X509Certificate[] certs, final String authType)
                    {
                    }

                    @Override
                    public java.security.cert.X509Certificate[] getAcceptedIssuers()
                    {
                        return null;
                    }
                }
        };

        // Install the all-trusting trust manager.
        try
        {
            // SSLContext context = SSLContext.getInstance("SSL");
            SSLContext context = SSLContext.getInstance("TLS");
            context.init(null, trustAllCerts, new java.security.SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(context.getSocketFactory());
        }
        catch (Exception exception)
        {
        }
    }
}