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/*
 * Copyright (c) 2012-2015, Microsoft Mobile
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package jsimple.io;

import org.jetbrains.annotations.Nullable;

/**
 * @author Bret Johnson
 * @since 11/24/12 4:37 PM
 */
public class FileSystemDirectory extends Directory {
    private java.io.File javaFile;

    public FileSystemDirectory(String directoryPath) {
        this.javaFile = new java.io.File(directoryPath);
    }

    public FileSystemDirectory(java.io.File javaFile) {
        this.javaFile = javaFile;
    }

    @Override public String getName() {
        return javaFile.getName();
    }

    @Override public String getPathString() {
        return javaFile.getPath();
    }

    @Override public File getFile(String name) {
        return new FileSystemFile(this, new java.io.File(javaFile, name));
    }

    @Override public Directory getDirectory(String name) {
        return new FileSystemDirectory(new java.io.File(javaFile, name));
    }

    @Override public boolean exists() {
        return javaFile.exists();
    }

    @Override public void create() {
        if (!javaFile.mkdirs()) {
            // mkdirs returns false if the directory already exists (which is fine) or if an error occurs (which isn't).
            // Check if the directory exists to differentiate
            if (! javaFile.exists())
                throw new IOException("Creating directory(ies) failed for {}", javaFile.toString());
        }
    }

    @Override public void renameTo(String newName) {
        if (! javaFile.renameTo(new java.io.File(javaFile.getParent(), newName)))
            throw new IOException("Could not rename directory {} to {}", getPathString(), newName);
    }

    /**
     * Visit the child elements of this path--basically list the files and subdirectories of a directory, calling the
     * visitor for each.  Just direct children are listed, not all descendants; callers can call this method recursively
     * if they want to visit all descendants.  If the path isn't a directory, an exception is thrown.
     */
    @Override public void visitChildren(@Nullable FileVisitor fileVisitor, @Nullable DirectoryVisitor directoryVisitor, @Nullable VisitFailed visitFailed) {
        java.io.File[] children = javaFile.listFiles();

        // TODO: Add error handling, calling visitFailed

        if (children == null)
            throw new IOException("Getting contents of directory failed for {}", javaFile.toString());

        int length = children.length;
        for (int i = 0; i < length; i++) {
            java.io.File childFile = children[i];

            if (childFile.isDirectory()) {
                if (directoryVisitor != null) {
                    if (!directoryVisitor.visit(new FileSystemDirectory(childFile)))
                        break;
                }
            } else {
                if (fileVisitor != null) {
                    if (!fileVisitor.visit(new FileSystemFile(this, childFile)))
                        break;
                }
            }
        }
    }

    @Override public void delete() {
        if (!javaFile.delete())
            throw new IOException("Deleting directory failed for {}", javaFile.toString());
    }

    @Override public long getLastModifiedTime() {
        long lastModified = javaFile.lastModified();
        if (lastModified == 0 && !javaFile.exists())
            throw new PathNotFoundException(javaFile.toString());
        return lastModified;
    }

    @Override public void setLastModifiedTime(long time) {
        // TODO: Improve this, so doesn't try to change on Android but does when can
        javaFile.setLastModified(time);
/*
        if (!javaFile.setLastModified(time))
            throw new IOException("setLastModifiedTime failed on {}", javaFile.toString());
*/
    }

    @Override public boolean isSetLastModifiedTimeSupported() {
        return true;
    }

    public java.io.File getJavaFile() {
        return javaFile;
    }
}