#!/bin/sh

if [ "$#" -lt 2 ]; then
    echo "Usage: $0 <target> <replacement>"
    exit 1
fi

REDFG=$(printf '\033[31m')
BLUBG=$(printf '\033[42m')
ag --color "$1" . | sed -E "s/$1/\\0$REDFG$BLUBG$2/g"
echo Are they ok for you?
read -r YN

case "$YN" in
    y|Y)
        ag "$1" . -l -0 | xargs -0 sed -Ei "s/$1/$2/g"
        ;;
    *)
        exit
        ;;
esac