#
# Copyright (c) 2019, Intel Corporation
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#     * Redistributions of source code must retain the above copyright notice,
#       this list of conditions and the following disclaimer.
#     * Redistributions 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 Intel Corporation nor the names of its contributors
#       may be used to endorse or promote products derived from this software
#       without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#!/bin/bash

if (( $# < 3 )); then
	echo "USE: $0 tree-root tree-depth files-per-level"
fi
tree_root=$1
tree_depth=$2
files_per_level=$3

if [[ -d $tree_root ]]; then
	read -p "Directory root $tree_root already exists. Do you want to delete it? (y/N) " deldir
	if [[ $deldir = "y" ]]; then
		rm -fr $tree_root
	fi
fi

create_subdir () {
	if (( $2 > 0 )); then
		mkdir $1
		cd $1
		for i in `seq 1 $3`; do
			new_name=$(cat /dev/urandom | tr -dc 'a-z' | fold -w 32 | head -n 1)
			touch $new_name
		done
		for i in `seq 1 3`; do
			new_name=$(cat /dev/urandom | tr -dc 'a-z' | fold -w 5 | head -n 1)
			create_subdir $new_name $(($2-1)) $3
		done
		cd ..
	fi
}

create_subdir $tree_root $tree_depth $files_per_level
