/*
 * Copyright (c) 2010-2023 JogAmp Community. All rights reserved.
 * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
 * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
 * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
 * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
 * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
 * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
 * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed or intended for use
 * in the design, construction, operation or maintenance of any nuclear
 * facility.
 *
 * Sun gratefully acknowledges that this software was originally authored
 * and developed by Kenneth Bradley Russell and Christopher John Kline.
 */
package com.jogamp.gluegen;

import java.io.*;
import java.util.*;

public class CodeGenUtils {

    /**
     * Converts first letter to upper case.
     */
    public static String capitalizeString(final String string) {
        return Character.toUpperCase(string.charAt(0)) + string.substring(1);
    }

    /**
     * Converts first letter to lower case.
     */
    public static String decapitalizeString(final String string) {
        return Character.toLowerCase(string.charAt(0)) + string.substring(1);
    }

    /**
     * Given a java package name (e.g., "java.lang"), return the package as a
     * directory path (i.e., "java/lang").
     */
    public static String packageAsPath(final String packageName) {
        final String path = packageName.replace('.', File.separatorChar);
        //System.out.println("Converted package [" + packageName + "] to path [" + path +"]");
        return path;
    }

    /**
     * @param generator the object that is emitting the autogenerated code. If
     * null, the generator will not be mentioned in the warning message.
     * @param customLine maybe null
     */
    public static void emitAutogeneratedWarning(final PrintWriter w, final Object generator, final String customLine) {
        w.print("/* !---- DO NOT EDIT: This file autogenerated ");
        if (generator != null) {
            w.print("by ");
            w.print(packageAsPath(generator.getClass().getName()));
            w.print(".java ");
        }
        w.print("on ");
        w.print((new Date()).toString());
        w.println(" ----! */");
        if( null != customLine && customLine.length() > 0 ) {
            w.print("/* !---- ");
            w.print(customLine);
            w.println(" ----! */");
        }
        w.println();
    }

    /**
     * Emit the opening headers for one java class/interface file.
     */
    public static void emitJavaHeaders(final PrintWriter w,
            final String packageName,
            final String className,
            final boolean isClassNotInterface,
            final List<String> imports,
            final String[] accessModifiers,
            final String[] interfaces,
            final String classExtended,
            final EmissionCallback classDocComment) throws IOException {
        w.println("package " + packageName + ";");
        w.println();

        for (final String imp : imports) {
            w.print("import ");
            w.print(imp);
            w.println(';');
        }

        w.println();

        if (classDocComment != null) {
            classDocComment.emit(w);
        }

        for (int i = 0; accessModifiers != null && i < accessModifiers.length; ++i) {
            w.print(accessModifiers[i]);
            w.print(' ');
        }

        if (isClassNotInterface) {
            w.print("class ");
            w.print(className);
            w.print(' ');
            if (classExtended != null) {
                w.print("extends ");
                w.print(classExtended);
                w.print(' ');
            }
        } else {
            if (classExtended != null) {
                throw new IllegalArgumentException("Autogenerated interface class " + className + " cannot extend class " + classExtended);
            }
            w.print("interface ");
            w.print(className);
            w.print(' ');
        }

        for (int i = 0; interfaces != null && i < interfaces.length; ++i) {
            if (i == 0) {
                w.print(isClassNotInterface ? "implements " : "extends ");
            }
            w.print(interfaces[i]);
            if (i < interfaces.length - 1) {
                w.print(", ");
            }
        }

        w.println('{');
    }

    //-----------------------------------------
    /** A class that emits source code of some time when activated. */
    public interface EmissionCallback {

        /** Emit appropriate source code through the given writer. */
        public void emit(PrintWriter output);
    }
}
