/*
 * 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.htmlize;

import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

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

import fr.devinsy.statoolinfos.core.Configuration;
import fr.devinsy.statoolinfos.core.Factory;
import fr.devinsy.statoolinfos.core.Federation;
import fr.devinsy.statoolinfos.core.Organization;
import fr.devinsy.statoolinfos.core.Service;
import fr.devinsy.statoolinfos.core.StatoolInfosException;
import fr.devinsy.statoolinfos.core.StatoolInfosUtils;
import fr.devinsy.statoolinfos.crawl.CrawlCache;
import fr.devinsy.statoolinfos.stats.PropertyStats;
import fr.devinsy.statoolinfos.stats.StatAgent;

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

    /**
     * Instantiates a new htmlizer.
     */
    private Htmlizer()
    {
    }

    /**
     * Clear.
     *
     * @param configuration
     *            the configuration
     */
    public static void clear(final Configuration configuration)
    {
        logger.info("Htmlize directory setting: {}", configuration.getHtmlizeDirectoryPath());

        String htmlDirectoryPath = configuration.getHtmlizeDirectoryPath();
        if (StringUtils.isBlank(htmlDirectoryPath))
        {
            logger.warn("Undefined htmlize directory.");
        }
        else if (!new File(htmlDirectoryPath).exists())
        {
            logger.warn("Htmlize directory does not exist: {}.", htmlDirectoryPath);
        }
        else
        {
            File htmlizeDirectory = configuration.getHtmlizeDirectory();

            for (File file : htmlizeDirectory.listFiles())
            {
                if ((file.isFile()) && (StringUtils.endsWithAny(file.getName(), ".properties", ".js", ".html", ".ico", ".css", ".jpg", ".xhtml")))
                {
                    logger.info("Deleting " + file.getName());
                    file.delete();
                }
            }
        }
    }

    /**
     * Copy stuff.
     *
     * @param target
     *            the target
     * @throws IOException
     */
    private static void copyStuff(final File targetDirectory) throws IOException
    {
        // Copy commons files (index, images, favicon, css…).
        if (!new File(targetDirectory, "index.html").exists())
        {

            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/index.html", targetDirectory);
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/statoolinfos.css", targetDirectory);
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/Chart.bundle.min.js", targetDirectory);
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/sorttable.js", targetDirectory);
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/statoolinfos-logo.jpg", targetDirectory);
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/statoolinfos-logo.ico", targetDirectory);
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/statoolinfos-logo-name.jpg", targetDirectory);
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/statoolinfos-logo.jpg", new File(targetDirectory, "logo.jpg"));
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/statoolinfos-logo.ico", new File(targetDirectory, "favicon.ico"));
        }
    }

    /**
     * Htmlize.
     *
     * @param configuration
     *            the configuration
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws StatoolInfosException
     *             the statool infos exception
     */
    public static void htmlize(final Configuration configuration) throws IOException, StatoolInfosException
    {
        logger.info("Cache setting: {}", configuration.getCrawlCachePath());
        logger.info("Htmlize input setting: {}", configuration.getHtmlizeInputPath());
        logger.info("Htmlize directory setting: {}", configuration.getHtmlizeDirectoryPath());

        File htmlizeInput = configuration.getHtmlizeInput();
        File htmlizeDirectory = configuration.getHtmlizeDirectory();
        if (htmlizeInput == null)
        {
            throw new IllegalArgumentException("Htmlize input undefined.");
        }
        else if (!htmlizeInput.exists())
        {
            throw new IllegalArgumentException("Htmlize input is missing.");
        }
        else if (htmlizeInput.isDirectory())
        {
            throw new IllegalArgumentException("Htmlize input is a directory.");
        }
        else if (htmlizeDirectory == null)
        {
            throw new IllegalArgumentException("Htmlize directory undefined.");
        }
        else if (!htmlizeDirectory.exists())
        {
            throw new IllegalArgumentException("Htmlize directory is missing.");
        }
        else if (!htmlizeDirectory.isDirectory())
        {
            throw new IllegalArgumentException("Htmlize directory is not a directory.");
        }
        else
        {
            if (configuration.isFederation())
            {
                Htmlizer.htmlizeFederation(configuration);
            }
            else if (configuration.isOrganization())
            {
                Htmlizer.htmlizeOrganisation(configuration);
            }
            else
            {
                logger.warn("No htmlize for this input: {}.", configuration.getClassName());
            }
        }
    }

    /**
     * Htmlize.
     *
     * @param configurationFile
     *            the configuration file
     * @throws StatoolInfosException
     *             the statool infos exception
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public static void htmlize(final File configurationFile) throws StatoolInfosException, IOException
    {
        logger.info("Htmlize {}", configurationFile.getAbsolutePath());

        Configuration configuration = Factory.loadConfiguration(configurationFile);

        htmlize(configuration);
    }

    /**
     * Htmlize federation.
     *
     * @param configuration
     *            the configuration
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws StatoolInfosException
     *             the statool infos exception
     */
    public static void htmlizeFederation(final Configuration configuration) throws IOException, StatoolInfosException
    {
        CrawlCache cache = configuration.getCrawlCache();
        File htmlizeInput = configuration.getHtmlizeInput();
        File htmlizeDirectory = configuration.getHtmlizeDirectory();

        Federation federation = Factory.loadFederation(htmlizeInput, cache);

        copyStuff(htmlizeDirectory);

        // Manage the logo file.
        logger.info("Htmlize federation logo.");
        cache.restoreLogoTo(federation.getLogoURL(), new File(htmlizeDirectory, federation.getTechnicalName() + "-logo.png"), federation.getTechnicalName());
        logger.info("Htmlize federation properties file.");
        FileUtils.copyFile(federation.getLocalFile(), new File(htmlizeDirectory, federation.getTechnicalName() + ".properties"));

        //
        logger.info("Htmlize about page.");
        String page = AboutPage.build();
        FileUtils.write(new File(htmlizeDirectory, "about.xhtml"), page, StandardCharsets.UTF_8);

        //
        logger.info("Htmlize federation page: {}.", federation.getName());
        page = FederationPage.build(federation);
        FileUtils.write(new File(htmlizeDirectory, "index.xhtml"), page, StandardCharsets.UTF_8);

        for (Organization organization : federation.getOrganizations())
        {
            // Manage the logo file.
            logger.info("Htmlize organization logo: {}.", organization.getName());
            cache.restoreLogoTo(organization.getLogoURL(), new File(htmlizeDirectory, organization.getTechnicalName() + "-logo.png"), organization.getTechnicalName());
            logger.info("Htmlize organization properties file: {}.", organization.getName());
            FileUtils.copyFile(organization.getLocalFile(), new File(htmlizeDirectory, organization.getTechnicalName() + ".properties"));

            //
            logger.info("Htmlize organization page: {}.", organization.getName());
            page = OrganizationPage.build(organization);
            FileUtils.write(new File(htmlizeDirectory, organization.getTechnicalName() + ".xhtml"), page, StandardCharsets.UTF_8);

            for (Service service : organization.getServices())
            {
                // Manage the logo file.
                logger.info("Htmlize service logo: {}.", service.getName());
                cache.restoreLogoTo(service.getLogoURL(), new File(htmlizeDirectory, organization.getTechnicalName() + "-" + service.getTechnicalName() + "-logo.png"), service.getTechnicalName());
                logger.info("Htmlize service properties file: {}.", service.getName());
                FileUtils.copyFile(service.getLocalFile(),
                        new File(htmlizeDirectory, organization.getTechnicalName() + "-" + service.getTechnicalName() + ".properties"));

                logger.info("Htmlize service page: {}.", service.getName());
                page = ServicePage.build(organization, service);
                FileUtils.write(new File(htmlizeDirectory, organization.getTechnicalName() + "-" + service.getTechnicalName() + ".xhtml"), page, StandardCharsets.UTF_8);
            }
        }

        //
        logger.info("Htmlize propertiesFiles page.");
        page = PropertiesFilesPage.build(federation);
        FileUtils.write(new File(htmlizeDirectory, "propertiesFiles.xhtml"), page, StandardCharsets.UTF_8);

        //
        {
            logger.info("Htmlize propertyStats page.");
            PropertyStats stats = StatAgent.statAllProperties(federation);
            PropertyStats federationStats = StatAgent.statFederationProperties(federation);
            PropertyStats organizationsStats = StatAgent.statOrganizationsProperties(federation.getOrganizations());
            PropertyStats servicesStats = StatAgent.statServicesProperties(federation.getAllServices());
            page = PropertyStatsPage2.build(stats, federationStats, organizationsStats, servicesStats);
            FileUtils.write(new File(htmlizeDirectory, "propertyStats.xhtml"), page, StandardCharsets.UTF_8);
        }
    }

    /**
     * Htmlize organisation.
     *
     * @param configuration
     *            the configuration
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws StatoolInfosException
     *             the statool infos exception
     */
    public static void htmlizeOrganisation(final Configuration configuration) throws IOException, StatoolInfosException
    {
        CrawlCache cache = configuration.getCrawlCache();
        File htmlizeInput = configuration.getHtmlizeInput();
        File htmlizeDirectory = configuration.getHtmlizeDirectory();

        Organization organization = Factory.loadOrganization(configuration.getBuildInput(), cache);

        copyStuff(htmlizeDirectory);

        // Manage the logo file.
        cache.restoreLogoTo(organization.getLogoURL(), new File(htmlizeDirectory, organization.getTechnicalName() + "-logo.jpg"), organization.getTechnicalName());

        //
        logger.info("Htmlize about page.");
        String page = AboutPage.build();
        FileUtils.write(new File(htmlizeDirectory, "about.xhtml"), page, StandardCharsets.UTF_8);

        //
        page = OrganizationPage.build(organization);
        FileUtils.write(new File(htmlizeDirectory, "index.xhtml"), page, StandardCharsets.UTF_8);

        for (Service service : organization.getServices())
        {
            // Manage the logo file.
            cache.restoreLogoTo(service.getLogoURL(), new File(htmlizeDirectory, service.getTechnicalName() + "-logo.jpg"), service.getTechnicalName());

            //
            page = ServicePage.build(organization, service);
            FileUtils.write(new File(htmlizeDirectory, organization.getTechnicalName() + "-" + service.getTechnicalName() + ".xhtml"), page, StandardCharsets.UTF_8);
        }
    }
}