/*
 * 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.slf4j.Logger;
import org.slf4j.LoggerFactory;

import fr.devinsy.statoolinfos.core.CrawlCache;
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;

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

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

    /**
     * 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/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"));
            StatoolInfosUtils.copyRessource("/fr/devinsy/statoolinfos/htmlize/stuff/about.xhtml", targetDirectory);
        }
    }

    /**
     * Htmlize federation.
     *
     * @param federation
     *            the federation
     * @param cache
     *            the cache
     * @throws IOException
     * @throws StatoolInfosException
     */
    public static void htmlize(final Federation federation, final CrawlCache cache) throws IOException, StatoolInfosException
    {
        File targetDirectory = new File(federation.get("conf.htmlize.directory"));
        logger.info("Htmlize target directory: {}", targetDirectory.getAbsoluteFile());

        if (!targetDirectory.exists())
        {
            throw new IllegalArgumentException("Htmlize target directory is missing.");
        }
        else if (!targetDirectory.isDirectory())
        {
            throw new IllegalArgumentException("Htmlize target directory is not a directory.");
        }
        else
        {
            copyStuff(targetDirectory);
            cache.restoreLogoTo(federation.getLogoURL(), new File(targetDirectory, federation.getTechnicalName() + "-logo.jpg"));

            //
            String page = FederationPage.build(federation);
            FileUtils.write(new File(targetDirectory, "index.xhtml"), page, StandardCharsets.UTF_8);

            for (Organization organization : federation.getOrganizations())
            {
                page = OrganizationPage.build(organization);
                FileUtils.write(new File(targetDirectory, organization.getTechnicalName() + ".xhtml"), page, StandardCharsets.UTF_8);

                for (Service service : organization.getServices())
                {
                    page = ServicePage.build(service);
                    FileUtils.write(new File(targetDirectory, organization.getTechnicalName() + "-" + service.getTechnicalName() + ".xhtml"), page, StandardCharsets.UTF_8);
                }
            }

            // Download federation stuff (favicon, logo…).
            // Build the federation page.

            // For each organization
            // Download organization stuff (favicon, logo…).
            // Build organization page.
            // for each service
            // Download service stuff (favicon, logo…).
            // Build service page.
        }
    }

    /**
     * Htmlize organization.
     *
     * @param federation
     *            the federation
     * @param targetDirectory
     *            the target directory
     * @throws IOException
     * @throws StatoolInfosException
     */
    public static void htmlize(final Organization organization, final CrawlCache cache) throws IOException, StatoolInfosException
    {
        File targetDirectory = new File(organization.get("conf.htmlize.directory"));
        logger.info("Htmlize target directory: {}", targetDirectory.getAbsoluteFile());

        if (!targetDirectory.exists())
        {
            throw new IllegalArgumentException("Htmlize target directory is missing.");
        }
        else if (!targetDirectory.isDirectory())
        {
            throw new IllegalArgumentException("Htmlize target directory is not a directory.");
        }
        else
        {
            copyStuff(targetDirectory);

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

            for (Service service : organization.getServices())
            {
                page = ServicePage.build(service);
                FileUtils.write(new File(targetDirectory, organization.getTechnicalName() + "-" + service.getTechnicalName() + ".xhtml"), page, StandardCharsets.UTF_8);
            }

            // Download federation stuff (favicon, logo…).
            // Build the federation page.

            // For each organization
            // Download organization stuff (favicon, logo…).
            // Build organization page.
            // for each service
            // Download service stuff (favicon, logo…).
            // Build service page.
        }
    }
}