#!/usr/bin/env zsh

Help()
{
    echo "fif -g \"string\" -f \"regex pattern\" [-d \"path\"]      "
    echo "    Options:                                              "
    echo "        -g string        [REQUIRED] search string for grep"
    echo "        -f regex         [REQUIRED] filemask for search   "
    echo "        [-d directory]   path to search [defaults to . ]  "
    echo "        -v               prints matching lines in files.  "
    echo "                         (default is file list only)      "
    echo "        -h               display this help                "
    echo "                                                          "
    echo "EXAMPLES:                                                 "
    echo " fif -g \"hello\" -f \"(?i)^.*\.bas+$\"                   "
    echo "    searches all files maching the mask '*.bas' in the    "
    echo "    current working directory for the string 'hello'.     "
    echo "                                                          "
    echo " fif -g \"len\" -f \"(?i)^.*\.py+$\" -d /home/gmgauthier/Projects/code/python -v"
    echo "    searches all files maching the mask '*.py' in the     "
    echo "    'src/package' directory, for the string '.alen'       "
    echo "    and prints the matched lines to the console           "
    echo "                                                          "
    echo "NOTES:                                                    "
    echo "  - something similar can be done with a single grep.     "
    echo "    eg: 'grep -rnw ~/Projects/code/python/passwdtools -e '.*\.length.*'"
    echo "    However, the raw grep doesn't give you the            "
    echo "    ability to choose which files to scan.                "
    echo ""
    echo "  - grep takes a simple search string                     "
    echo "  - the filemask can be either ERE or PCRE regex          "
    echo "  - all searches are recursive                            "
    exit 0
}

while getopts g:f:d:hv flag
do
    case "${flag}" in
        g) grepstr=${OPTARG};;
        f) filemask=${OPTARG};;
        d) dir=${OPTARG};;
        v) verbose=true;;
        h) Help;;
    esac
done

if [[ -z $grepstr ]] then
    echo "You must supply a search string in ere regex format"
    exit 0
fi

if [[ -z $filemask ]] then
    echo "You must supply a filename filter for searches in pcre regex format"
    exit 0
fi

if [[ -z $dir ]] then
    dir="."
fi

# We have to validate the filelist first, otherwise grep will just 
# try to search on whatever is in the PWD
filelist=$(fd -0 $filemask $dir|sed 's/.$//')
if [[ -z $filelist ]] || [[ $filelist == "" ]] then
    echo "No files found matching your filemask. Search cannot be executed"
    exit 1
else
    if [[ $verbose == true ]]; then
        grep -inwrE $grepstr $(fd -0 -H $filemask $dir|sed 's/.$//') # sed strips fd's "%"
    else
        grep -linwrE $grepstr $(fd -0 -H $filemask $dir|sed 's/.$//') # sed strips fd's "%"
    fi
fi
exit 0