#!/bin/bash

# Trap RC != 0 and display
EC() {
	echo -e '\e[1;31m'code $?'\e[m\n'
}
trap EC ERR

# Simple calculator
calc() {
	local result=""
	result="$(printf "scale=10;$*\n" | bc --mathlib | tr -d '\\\n')"
	#						└─ default (when `--mathlib` is used) is 20

	if [[ "$result" == *.* ]]; then
		# improve the output for decimal numbers
		printf "$result" |
		sed -e 's/^\./0./'		  `# add "0" for cases like ".5"` \
			-e 's/^-\./-0./'	  `# add "0" for cases like "-.5"`\
			-e 's/0*$//;s/\.$//';  # remove trailing zeros
	else
		printf "$result"
	fi
	printf "\n"
}

# Create a new directory and enter it
mkd() {
	mkdir -p "$@" && cd "$@"
}

# cd and list
cl() {
	local dir="$1"
	local dir="${dir:=$HOME}"
	if [[ -d "$dir" ]]; then
		cd "$dir" >/dev/null; ls -l
	else
		echo "bash: cl: $dir: Directory not found"
	fi
}

# Simple Note App
note () {
    # if file doesn't exist, create it
    if [[ ! -f $HOME/.notes ]]; then
        touch "$HOME/.notes"
    fi

    if ! (($#)); then
        # no arguments, print file
        cat "$HOME/.notes"
    elif [[ "$1" == "-c" ]]; then
        # clear file
        printf "%s" > "$HOME/.notes"
    else
        # add all arguments to file
        printf "%s\n" "$*" >> "$HOME/.notes"
    fi
}

todo() {
    if [[ ! -f $HOME/.todo ]]; then
        touch "$HOME/.todo"
    fi

    if ! (($#)); then
        cat "$HOME/.todo"
    elif [[ "$1" == "-l" ]]; then
        nl -b a "$HOME/.todo"
    elif [[ "$1" == "-c" ]]; then
        > $HOME/.todo
    elif [[ "$1" == "-r" ]]; then
        nl -b a "$HOME/.todo"
        eval printf %.0s- '{1..'"${COLUMNS:-$(tput cols)}"\}; echo
        read -p "Type a number to remove: " number
        sed -i ${number}d $HOME/.todo
    else
        printf "%s\n" "$*" >> "$HOME/.todo"
    fi
}

# Make a temporary directory and enter it
tmpd() {
	if [ $# -eq 0 ]; then
		dir=`mktemp -d` && cd $dir
	else
		dir=`mktemp -d -t $1.XXXXXXXXXX` && cd $dir
	fi
}

# Create a .tar.gz archive, using `zopfli`, `pigz` or `gzip` for compression
targz() {
	local tmpFile="${@%/}.tar"
	tar -cvf "${tmpFile}" --exclude=".DS_Store" "${@}" || return 1

	size=$(
	stat -f"%z" "${tmpFile}" 2> /dev/null; # OS X `stat`
	stat -c"%s" "${tmpFile}" 2> /dev/null # GNU `stat`
	)

	local cmd=""
	if (( size < 52428800 )) && hash zopfli 2> /dev/null; then
		# the .tar file is smaller than 50 MB and Zopfli is available; use it
		cmd="zopfli"
	else
		if hash pigz 2> /dev/null; then
			cmd="pigz"
		else
			cmd="gzip"
		fi
	fi

	echo "Compressing .tar using \`${cmd}\`…"
	"${cmd}" -v "${tmpFile}" || return 1
	[ -f "${tmpFile}" ] && rm "${tmpFile}"
	echo "${tmpFile}.gz created successfully."
}

# Determine size of a file or total size of a directory
fs() {
	if du -b /dev/null > /dev/null 2>&1; then
		local arg=-sbh
	else
		local arg=-sh
	fi
	if [[ -n "$@" ]]; then
		du $arg -- "$@"
	else
		du $arg .[^.]* *
	fi
}

# Create a data URL from a file
dataurl() {
	local mimeType=$(file -b --mime-type "$1")
	if [[ $mimeType == text/* ]]; then
		mimeType="${mimeType};charset=utf-8"
	fi
	echo "data:${mimeType};base64,$(openssl base64 -in "$1" | tr -d '\n')"
}

# Create a git.io short URL
gitio() {
	if [ -z "${1}" -o -z "${2}" ]; then
		echo "Usage: \`gitio slug url\`"
		return 1
	fi
	curl -i http://git.io/ -F "url=${2}" -F "code=${1}"
}

# Start an HTTP server from a directory, optionally specifying the port
server() {
	local port="${1:-8000}"
	sleep 1 && open "http://localhost:${port}/" &
	# Set the default Content-Type to `text/plain` instead of `application/octet-stream`
	# And serve everything as UTF-8 (although not technically correct, this doesn’t break anything for binary files)
	python -c $'import SimpleHTTPServer;\nmap = SimpleHTTPServer.SimpleHTTPRequestHandler.extensions_map;\nmap[""] = "text/plain";\nfor key, value in map.items():\n\tmap[key] = value + ";charset=UTF-8";\nSimpleHTTPServer.test();' "$port"
}

# Compare original and gzipped file size
gz() {
	local origsize=$(wc -c < "$1")
	local gzipsize=$(gzip -c "$1" | wc -c)
	local ratio=$(echo "$gzipsize * 100 / $origsize" | bc -l)
	printf "orig: %d bytes\n" "$origsize"
	printf "gzip: %d bytes (%2.2f%%)\n" "$gzipsize" "$ratio"
}

# Syntax-highlight JSON strings or files
# Usage: `json '{"foo":42}'` or `echo '{"foo":42}' | json`
json() {
	if [ -t 0 ]; then # argument
		python -mjson.tool <<< "$*" | pygmentize -l javascript
	else # pipe
		python -mjson.tool | pygmentize -l javascript
	fi
}

# Run `dig` and display the most useful info
digga() {
	dig +nocmd "$1" any +multiline +noall +answer
}

# UTF-8-encode a string of Unicode symbols
escape() {
	printf "\\\x%s" $(printf "$@" | xxd -p -c1 -u)
	# print a newline unless we’re piping the output to another program
	if [ -t 1 ]; then
		echo ""; # newline
	fi
}

# Decode \x{ABCD}-style Unicode escape sequences
unidecode() {
	perl -e "binmode(STDOUT, ':utf8'); print \"$@\""
	# print a newline unless we’re piping the output to another program
	if [ -t 1 ]; then
		echo ""; # newline
	fi
}

# Get a character’s Unicode code point
codepoint() {
	perl -e "use utf8; print sprintf('U+%04X', ord(\"$@\"))"
	# print a newline unless we’re piping the output to another program
	if [ -t 1 ]; then
		echo ""; # newline
	fi
}

# Show all the names (CNs and SANs) listed in the SSL certificate
# for a given domain
getcertnames() {
	if [ -z "${1}" ]; then
		echo "ERROR: No domain specified."
		return 1
	fi

	local domain="${1}"
	echo "Testing ${domain}…"
	echo ""; # newline

	local tmp=$(echo -e "GET / HTTP/1.0\nEOT" \
		| openssl s_client -connect "${domain}:443" 2>&1)

	if [[ "${tmp}" = *"-----BEGIN CERTIFICATE-----"* ]]; then
		local certText=$(echo "${tmp}" \
			| openssl x509 -text -certopt "no_header, no_serial, no_version, \
			no_signame, no_validity, no_issuer, no_pubkey, no_sigdump, no_aux")
		echo "Common Name:"
		echo ""; # newline
		echo "${certText}" | grep "Subject:" | sed -e "s/^.*CN=//"
		echo ""; # newline
		echo "Subject Alternative Name(s):"
		echo ""; # newline
		echo "${certText}" | grep -A 1 "Subject Alternative Name:" \
			| sed -e "2s/DNS://g" -e "s/ //g" | tr "," "\n" | tail -n +2
		return 0
	else
		echo "ERROR: Certificate not found."
		return 1
	fi
}

# `v` with no arguments opens the current directory in Vim, otherwise opens the
# given location
v() {
	if [ $# -eq 0 ]; then
		vim .
	else
		vim "$@"
	fi
}

# `o` with no arguments opens the current directory, otherwise opens the given
# location
o() {
	if [ $# -eq 0 ]; then
		xdg-open .	> /dev/null 2>&1
	else
		xdg-open "$@" > /dev/null 2>&1
	fi
}

# `tre` is a shorthand for `tree` with hidden files and color enabled, ignoring
# the `.git` directory, listing directories first. The output gets piped into
# `less` with options to preserve color and line numbers, unless the output is
# small enough for one screen.
tre() {
	tree -aC -I '.git' --dirsfirst "$@" | less -FRNX
}

# Get colors in manual pages
man() {
	env \
		LESS_TERMCAP_mb=$(printf "\e[1;31m") \
		LESS_TERMCAP_md=$(printf "\e[1;31m") \
		LESS_TERMCAP_me=$(printf "\e[0m") \
		LESS_TERMCAP_se=$(printf "\e[0m") \
		LESS_TERMCAP_so=$(printf "\e[1;44;33m") \
		LESS_TERMCAP_ue=$(printf "\e[0m") \
		LESS_TERMCAP_us=$(printf "\e[1;32m") \
		man "$@"
}

# Use feh to nicely view images
openimage() {
	local types='*.jpg *.JPG *.png *.PNG *.gif *.GIF *.jpeg *.JPEG'

	cd $(dirname "$1")
	local file=$(basename "$1")

	feh -q $types --auto-zoom \
		--sort filename --borderless \
		--scale-down --draw-filename \
		--image-bg black \
		--start-at "$file"
}

# get dbus session
dbs() {
	local t=$1
	if [[  -z "$t" ]]; then
		local t="session"
	fi

	dbus-send --$t --dest=org.freedesktop.DBus \
		--type=method_call	--print-reply \
		/org/freedesktop/DBus org.freedesktop.DBus.ListNames
}

# check if uri is up
isup() {
	local uri=$1

	if curl -s --head  --request GET "$uri" | grep "200 OK" > /dev/null ; then
		notify-send --urgency=critical "$uri is down"
	else
		notify-send --urgency=low "$uri is up"
	fi
}

# get the name of a x window
xname(){
	local window_id=$1

	if [[ -z $window_id ]]; then
		echo "Please specifiy a window id, you find this with 'xwininfo'"

		return 1
	fi

	local match_string='".*"'
	local match_int='[0-9][0-9]*'
	local match_qstring='"[^"\\]*(\\.[^"\\]*)*"' # NOTE: Adds 1 backreference

	# get the name
	xprop -id $window_id | \
		sed -nr \
		-e "s/^WM_CLASS\(STRING\) = ($match_qstring), ($match_qstring)$/instance=\1\nclass=\3/p" \
		-e "s/^WM_WINDOW_ROLE\(STRING\) = ($match_qstring)$/window_role=\1/p" \
		-e "/^WM_NAME\(STRING\) = ($match_string)$/{s//title=\1/; h}" \
		-e "/^_NET_WM_NAME\(UTF8_STRING\) = ($match_qstring)$/{s//title=\1/; h}" \
		-e '${g; p}'
}

# Docker
d_stop(){
	docker stop $(docker ps -q)
}
d_clean(){
	docker rm $(docker ps -q -f status=exited)
	docker rmi $(docker images -q -f dangling=true)
	docker volume rm $(docker volume ls -f dangling=true)
}
d_reset(){
	docker stop $(docker ps -q)
	docker rm -f $(docker ps -aq)
	docker rmi -f  $(docker images -qa)
	docker volume rm $(docker volume ls -q)

}

## Radare2 Container OPS
d_r2(){
	docker run \
		-ti --rm \
		--cap-add=SYS_PTRACE \
		--name r2 \
		-v ~/RE:/mnt \
		-v ~/.radare2rc:/home/r2/.radare2rc:ro \
		-v ~/.bashrc:/home/r2/.bashrc:ro \
		-v ~/.bash_profile:/home/r2/.bash_profile:ro \
		-v ~/.exports:/home/r2/.exports:ro \
		-v ~/.aliases:/home/r2/.aliases:ro \
		radare/radare2 \
		bash
}
d_r2s(){
	docker exec -ti r2 bash
}

## Menu-Man
mman(){
	man -k . | sort | dmenu -l 30 | awk '{print substr($2, 2, length($2) - 2) " " $1}' | xargs -r $TERMINAL -e man
}

## Dump SSL Cert from host
## sslcheck example.com:25 -starttls smtp
## sslcheck example.com:443
sslcheck(){
	echo -n | openssl s_client -connect $* | tee /dev/tty | openssl x509 -text -noout
}

## kubesel: fzf-select a cubeconfig and source it
kubesel(){
	kubeconfig=$(find ~/.kube/kubesel -type f | rev | cut -d "/" -f 1 | rev | sort | fzf)
	export KUBECONFIG=~/.kube/kubesel/$kubeconfig
}

## SSH agent
## Add sth like test -z $noKeychain && agent to ~/.extra
function agent(){
	/usr/bin/keychain --nolock --nogui $HOME/.ssh/id_rsa
	source $HOME/.keychain/$HOSTNAME-sh
}