#!/bin/sh
fmt_esc() {
	printf "%s$1%s" "$eo" "$ec"
}

fmt_segment() {
	content="$1"
	[ -z "$content" ] && return
	printf '%s%s%s -> %s' "$(fmt_esc '\e[90m')" "${content}" "$(fmt_esc '\e[30m')" "$(fmt_esc '\e[0m')"
}

fmt_environment() {
	content="$1"
	[ -z "$content" ] && return
	printf '%s(%s%s%s)%s ' "$(fmt_esc '\e[30;40m')" "$(fmt_esc '\e[97m')" "$content" "$(fmt_esc '\e[30;40m')" "$(fmt_esc '\e[0m')"
}

[ -n "$1" ] && fmt_environment "$1"
fmt_environment "$VIRTUAL_ENV_PROMPT"

# only display hostname in prompt if connected over SSH
[ -n "$SSH_CLIENT" ] && fmt_segment "$(hostname)"

# current working directory
here="$PWD"
[ "$here" = "$HOME" ] && here="~"
fmt_segment "$(basename "$here")"

# git status
git rev-parse --is-inside-work-tree 1> /dev/null 2> /dev/null && fmt_segment "git $(git rev-parse --abbrev-ref HEAD 2> /dev/null)"

# exit happily
exit 0