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/*
 *
 RCaller, A solution for calling R from Java
 Copyright (C) 2010-2016  Mehmet Hakan Satman

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 any later version.

 This program 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 General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this program.  If not, see .
 *
 *
 * Mehmet Hakan Satman - [email protected]
 * http://www.mhsatman.com
 * Google code project: https://github.com/jbytecode/rcaller
 * Please visit the blog page with rcaller label:
 * http://stdioe.blogspot.com.tr/search/label/rcaller
 */
package com.github.rcaller.util;

import com.github.rcaller.exception.ExecutionException;
import com.github.rcaller.graphics.DefaultTheme;
import com.github.rcaller.graphics.GraphicsTheme;

import java.io.File;
import java.io.FileFilter;
import java.util.Arrays;

public class Globals {

    public static String cranRepos = "http://cran.r-project.org";
    public static String RScript_Windows = "C:\\Program Files\\R\\R-3.0.2\\bin\\Rscript.exe";
    public static String RScript_Linux = "/usr/bin/Rscript";
    public static String Rscript_current;
    public static String R_Windows = "C:\\Program Files\\R\\R-3.0.2\\bin\\R.exe";
    public static String R_Linux = "/usr/bin/R";
    public static String R_current;

    public static GraphicsTheme theme = new DefaultTheme();

    public final static String version = "RCaller 3.0";
    public final static String about = "Author: Mehmet Hakan Satman - [email protected]";
    public final static String license = "LGPL v3.0";

    static {
        if (isWindows()) {
            String programFiles = System.getenv("ProgramFiles");
            if (programFiles == null) {
                programFiles = "C:\\Program Files";
            }
            File rBase = new File(programFiles, "R");
            File[] rVersions = rBase.listFiles(new FileFilter() {
                @Override
                public boolean accept(File pathname) {
                    return pathname.isDirectory() && pathname.getName().startsWith("R-");
                }
            });
            Arrays.sort(rVersions);
            File rHome = rVersions[rVersions.length - 1];
            File rBin = new File(rHome, "bin");
            if ("amd64".equals(System.getProperty("os.arch"))) {
                File rBin64 = new File(rBin, "x64");
                if (rBin64.exists()) {
                    rBin = rBin64;
                }
            }
            R_Windows = new File(rBin, "R.exe").getAbsolutePath();
            RScript_Windows = new File(rBin, "Rscript.exe").getAbsolutePath();
        }
    }

    public static void detect_current_rscript() {
        if (isWindows()) {
            Rscript_current = RScript_Windows;
            R_current = R_Windows;
        } else {
            Rscript_current = RScript_Linux;
            R_current = R_Linux;
        }
    }

    public static boolean isWindows() {
        return System.getProperty("os.name").contains("Windows");
    }

    public static File findFileRecursively(File startingPath, String filename) {
        if (!startingPath.isDirectory()) {
            throw new ExecutionException(startingPath.toString() + " is not a directory:");
        }
        File[] childs = startingPath.listFiles();

        if (childs != null && childs.length > 0) {
            for (File child : childs) {
                if (child.isFile()) {
                    if (child.getName().equals(filename)) {
                        return (child);
                    }
                } else if (child.isDirectory()) {
                    if (child.listFiles().length > 0) {
                        File subsearch = findFileRecursively(child, filename);
                        if (subsearch != null) {
                            return (subsearch);
                        }
                    }
                }
            }
        }

        return null;
    }
}