package fr.xephi.authme;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import fr.xephi.authme.settings.Settings;

/**
 *
 * @author stefano
 */
public class PerformBackup {

    private String dbName = Settings.getMySQLDatabase;
    private String dbUserName = Settings.getMySQLUsername;
    private String dbPassword = Settings.getMySQLPassword;
    private String tblname = Settings.getMySQLTablename;
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd_HH-mm");
    String dateString = format.format(new Date());
    private String path = AuthMe.getInstance().getDataFolder() + File.separator + "backups" + File.separator + "backup" + dateString;
    private AuthMe instance;

    public PerformBackup(AuthMe instance) {
        this.setInstance(instance);
    }

    public boolean DoBackup() {

        switch (Settings.getDataSource) {
            case FILE:
                return FileBackup("auths.db");
            case MYSQL:
                return MySqlBackup();
            case SQLITE:
                return FileBackup(Settings.getMySQLDatabase + ".db");
            case SQLITEHIKARI:
                return FileBackup(Settings.getMySQLDatabase + ".db");
        }

        return false;
    }

    private boolean MySqlBackup() {
        File dirBackup = new File(AuthMe.getInstance().getDataFolder() + "/backups");

        if (!dirBackup.exists())
            dirBackup.mkdir();
        if (checkWindows(Settings.backupWindowsPath)) {
            String executeCmd = Settings.backupWindowsPath + "\\bin\\mysqldump.exe -u " + dbUserName + " -p" + dbPassword + " " + dbName + " --tables " + tblname + " -r " + path + ".sql";
            Process runtimeProcess;
            try {
                runtimeProcess = Runtime.getRuntime().exec(executeCmd);
                int processComplete = runtimeProcess.waitFor();
                if (processComplete == 0) {
                    ConsoleLogger.info("Backup created successfully.");
                    return true;
                } else {
                    ConsoleLogger.showError("Could not create the backup!");
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        } else {
            String executeCmd = "mysqldump -u " + dbUserName + " -p" + dbPassword + " " + dbName + " --tables " + tblname + " -r " + path + ".sql";
            Process runtimeProcess;
            try {
                runtimeProcess = Runtime.getRuntime().exec(executeCmd);
                int processComplete = runtimeProcess.waitFor();
                if (processComplete == 0) {
                    ConsoleLogger.info("Backup created successfully.");
                    return true;
                } else {
                    ConsoleLogger.showError("Could not create the backup!");
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        return false;
    }

    private boolean FileBackup(String backend) {
        File dirBackup = new File(AuthMe.getInstance().getDataFolder() + "/backups");

        if (!dirBackup.exists())
            dirBackup.mkdir();

        try {
            copy(new File("plugins" + File.separator + "AuthMe" + File.separator + backend), new File(path + ".db"));
            return true;

        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return false;
    }

    /*
     * Check if we are under Windows and correct location of mysqldump.exe
     * otherwise return error.
     */
    private boolean checkWindows(String windowsPath) {
        String isWin = System.getProperty("os.name").toLowerCase();
        if (isWin.indexOf("win") >= 0) {
            if (new File(windowsPath + "\\bin\\mysqldump.exe").exists()) {
                return true;
            } else {
                ConsoleLogger.showError("Mysql Windows Path is incorrect please check it");
                return true;
            }
        } else return false;
    }

    /*
     * Copyr src bytefile into dst file
     */
    void copy(File src, File dst) throws IOException {
        InputStream in = new FileInputStream(src);
        OutputStream out = new FileOutputStream(dst);

        // Transfer bytes from in to out
        byte[] buf = new byte[1024];
        int len;
        while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
        in.close();
        out.close();
    }

    public void setInstance(AuthMe instance) {
        this.instance = instance;
    }

    public AuthMe getInstance() {
        return instance;
    }

}