#!/bin/bash

# Generate 100 matching
bound=$1

ITERATIONS=${ITERATIONS:-100}
BREAK_AT=50

cd $2 || exit 1

echo ">>> Generating ${ITERATIONS} matching files"
mkdir matching
dd if=/dev/urandom of=./matching/0 bs=$bound count=1 >> /dev/null 2>&1 || exit 1
pushd matching >>/dev/null
	for i in $(seq 1 ${ITERATIONS}); do
		cp -f 0 $i || exit 1
	done
popd >>/dev/null

echo ">>> Generatig ${ITERATIONS} with unmatching file"
mkdir unmatching
dd if=/dev/urandom of=./unmatching/0 bs=$bound count=1 >> /dev/null 2>&1 || exit 1
pushd unmatching >> /dev/null
	for i in $(seq 1 ${ITERATIONS}); do
		if [[ $i == ${BREAK_AT} ]]; then
			echo " $i < unmatching"
			dd if=/dev/urandom of=$i bs=$bound count=1 >>/dev/null 2>&1 || exit
		else
			cp -f 0 $i || exit 1
		fi
	done
popd >> /dev/null
echo ">>> Generated in $2"