#!/bin/bash
#
# smart browser wrapper experiment 0.02
# Christian Birchinger <joker@netswarm.net>
#
# Priorities:
# running prefered browser, first running browser, available prefered browser, first available browser
#
# Why so much debug? - To test what it does on other peoples setups
# Things to try - Desktop (KDE, Gnome) environment dependant BROWSERS list (done?)
# Probably to lazy for... - Handle X and non-X environments
# Possible issues - command name != process name

# User's preference
PREFERED="${BROWSER}"

WHO="${USER-`whoami`}"

BROWSERS=( firefox-bin firefox mozilla-bin mozilla dillo )
pgrep -u ${WHO} -x kdeinit &>/dev/null && BROWSERS=( konqueror ${BROWSERS[@]} ) || BROWSERS=( ${BROWSERS[@]} konqueror )
pgrep -u ${WHO} -x gnome-session &>/dev/null && BROWSERS=( epiphany galeon ${BROWSERS[@]} ) || BROWSERS=( ${BROWSERS[@]} epiphany galeon )

debug() { [ -n "${debug}" ] && echo "DEBUG: $*"; }

# Remove user prefered browser from the list and add it on top of it
for (( i=0; $i < ${#BROWSERS[@]}; i++ )); do
	[ "${BROWSERS[${i}]}" = "${PREFERED##*/}" ] && unset BROWSERS[${i}]
done
BROWSERS=( ${PREFERED##*/} ${BROWSERS[@]} )

debug "browser test list: ${BROWSERS[@]}"
debug "user preference (\$BROWSER): ${PREFERED:-none}"

running=()
for run in "${BROWSERS[@]}"; do
	pgrep -u ${WHO} -x ${run} &>/dev/null && running=( ${running[@]} "${run}" )
done

debug "running browsers: ${running[@]-none}"

best_browser=''
if [ -n "${running[0]}" ]; then
	best_browser="${running[0]}"
	debug "using first running browser: ${best_browser}"
else
	for available in "${BROWSERS[@]}"; do
		which ${available} &>/dev/null && best_browser="${available}" && break
	done
	debug "using first installed: ${best_browser}"
fi

[ -z "${best_browser}" ] && { echo "No usable browsers found." >&2 ; exit 1; }

debug "starting: ${best_browser} $@"

#exec ${best_browser} $@