package de.intevation.aft;

import java.io.File;

import java.sql.SQLException;

import org.w3c.dom.Document;

import javax.xml.xpath.XPathConstants;

import de.intevation.utils.XML;

import de.intevation.db.ConnectionBuilder;

public class Sync
{
    public static final String FLYS = "flys";
    public static final String AFT  = "aft";

    public static final String XPATH_DIPS = "/sync/dips/@file";

    public static final String CONFIG_FILE =
        System.getProperty("config.file", "config.xml");

    public static void main(String [] args) {

        File configFile = new File(CONFIG_FILE);

        if (!configFile.isFile() || !configFile.canRead()) {
            System.err.println("cannot read config file");
            System.exit(1);
        }

        Document config = XML.parseDocument(configFile, Boolean.FALSE);

        if (config == null) {
            System.err.println("cannot load config");
            System.exit(1);
        }

        String dipsF = (String)XML.xpath(
            config, XPATH_DIPS, XPathConstants.STRING, null, null);

        if (dipsF == null || dipsF.length() == 0) {
            System.err.println("Cannot find path to DiPS xml in config.");
            System.exit(1);
        }

        File dipsFile = new File(dipsF);

        if (!dipsFile.isFile() || !dipsFile.canRead()) {
            System.err.println("Cannot find '" + dipsF + "'");
            System.exit(1);
        }

        Document dips = XML.parseDocument(dipsFile, Boolean.FALSE);

        if (dips == null) {
            System.err.println("Cannot load DiPs document.");
            System.exit(1);
        }

        ConnectionBuilder aftConnectionBuilder =
            new ConnectionBuilder(AFT, config);

        ConnectionBuilder flysConnectionBuilder =
            new ConnectionBuilder(FLYS, config);

        SyncContext syncContext = null;
        try {
            syncContext = new SyncContext(
                aftConnectionBuilder.getConnectedStatements(),
                flysConnectionBuilder.getConnectedStatements(),
                dips);
            Rivers rivers = new Rivers();
            rivers.sync(syncContext);
        }
        catch (SQLException sqle) {
            sqle.printStackTrace();
            System.err.println("syncing failed: " + sqle.getMessage());
        }
        finally {
            if (syncContext != null) {
                syncContext.close();
            }
        }
    }
}
// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :