/*
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 * and open the template in the editor.
 */
package m.watershed;

import csip.api.server.Executable;
import csip.api.server.ServiceException;
import csip.api.server.ServiceResources;
import csip.SessionLogger;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.logging.Level;
import org.apache.commons.io.FileUtils;

/**
 *
 * @author od
 */
public class Utils {

    /**
     * Execution wrapper.
     *
     * @param r
     * @param LOG
     * @param exe
     * @param args
     * @throws ServiceException
     * @throws IOException
     */
    public static void exec(ServiceResources r, SessionLogger LOG, String exe, Object... args)
            throws ServiceException, IOException {

        Executable e = r.getExe(exe);
        e.addArguments(args);

        int ret = e.exec();

        if (LOG.isLoggable(Level.INFO)) {
            if (e.stdout().exists()) {
                LOG.info(FileUtils.readFileToString(e.stdout(), "UTF-8"));
            }
        }

        if (ret != 0 && !exe.equals("mpirun")) {
            String err = "";
            if (e.stderr().exists()) {
                err = FileUtils.readFileToString(e.stderr(), "UTF-8");
            }
            throw new ServiceException(exe + ": " + ret + "  " + err);
        }
    }

    /**
     * Check if files exist in dir.
     *
     * @param dir
     * @param files
     * @throws ServiceException
     */
    public static void checkExist(File dir, String... files) throws ServiceException {
        for (String file : files) {
            if (!new File(dir, file).exists()) {
                throw new ServiceException("File not found: " + file);
            }
        }
    }

    /**
     * Check if files exist in dir.
     *
     * @param dir
     * @param files
     * @throws ServiceException
     */
    public static void checkExistPoint(File dir, String... files) throws ServiceException {
        for (String file : files) {
            if (!new File(dir, file).exists()) {
                throw new ServiceException("OutletPoint needs to be adjusted, or use accurate location feature.");
            }
        }
    }

    /**
     * Check if files exist in dir.
     *
     * @param dir
     * @return
     * @throws ServiceException
     * @throws java.io.FileNotFoundException
     */
    public static String rasterExtent(File dir) throws ServiceException, FileNotFoundException, IOException {
        String minX = "";
        String minY = "";
        String maxX = "";
        String maxY = "";

        File[] listFiles = dir.listFiles();
        String needed_gdalinfo_file = "";
        for (int i = 0; i < listFiles.length; i++) {
            if (listFiles[i].isFile()) {
                String fileName = listFiles[i].getName();
                if (fileName.startsWith("gdalinfo-") && fileName.endsWith("stdout.txt")) {
                    needed_gdalinfo_file = fileName;
                }
            }
        }

        try ( BufferedReader b = new BufferedReader(new FileReader(new File(dir, needed_gdalinfo_file)))) {
            String readLine = "";
            while ((readLine = b.readLine()) != null) {
                if (readLine.contains("Lower Left")) {
                    String[] ul_parts = readLine.split("\\(");
                    String[] coords = (ul_parts[1]).replaceAll("\\)", " ").trim().split(",");
                    minX = coords[0];
                    minY = coords[1];
                }
                if (readLine.contains("Upper Right")) {
                    String[] ul_parts = readLine.split("\\(");
                    String[] coords = (ul_parts[1]).replaceAll("\\)", " ").trim().split(",");
                    maxX = coords[0];
                    maxY = coords[1];
                }
            }
        }

        if (new File(dir, needed_gdalinfo_file).delete()) {
            System.out.println("File deleted successfully");
        } else {
            throw new ServiceException("File not found: " + new File(dir, needed_gdalinfo_file));
        }
        return minX + " " + minY + " " + maxX + " " + maxY;
    }
}