#!/bin/bash

# whatthefuck - smart wrapper around wtf
#
# Copyright (c) 2009, Devendra Gera <gera@theoldmonk.net>
# This software is released under the terms of the GNU General Public License
# version 2, a copy of which may be obtained from:
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
# This software comes with NO WARRANTY, either explicit or implied, to the
# extent permissible by law.
#
# Do not trust this code to do any useful thing. It will eat you and destroy
# all your data if not used properly. You have ben warned.

HTML2TEXT=html2text
WTF=`which wtf`
BROWSER=${BROWSER:=gnome-www-browser}

Term=$1
# eat the "is"
if [ x"$Term" == x"is" ]; then
	Term=$2
fi

if [ x"$Term" == x"" ]; then
	echo "wtf do you want?"
fi

function fetch_from_wikipedia() {
	local Term=$1
	local Filename=$2
	
	if [ x"$Term" == x"" ]; then
		return -1
	fi
	
	if [ x"$Filename" == x"" ]; then
		return -1
	fi

	wget -q -O - "http://en.wikipedia.org/wiki/$Term" | $HTML2TEXT -nobs | perl -ne 'print unless /^$/../^$/' > $Filename
	local file_lines=$(wc -l $Tempfile | awk '{print $1}')
	return $file_lines
}

Out=$($WTF $Term 2>/dev/null)
if [ $? -ne 0 ]; then
	Out=$($WTF -t comp $Term 2>/dev/null)

	if [ $? -ne 0 ]; then
		trap 'rm -f $Tempfile' 0 2 3 6 9 11 13 15 17
		Tempfile=`tempfile` || exit 1
		fetch_from_wikipedia $Term $Tempfile
		file_lines=$?

		if [ $file_lines -le 0 ]; then
			# try the uppercase version of the term
			Term2=`tr 'a-z' 'A-Z' <<<$Term`
			fetch_from_wikipedia $Term2 $Tempfile
			file_lines=$?

			if [ $file_lines -le 0 ]; then
				rm -f $Tempfile
				exec ${BROWSER} "http://www.google.com/search?q=$Term"
			fi
		fi
	fi
fi


if [ x"$Tempfile" == x"" ]; then
	# it's a wtf output
	echo $Out
	exit 0
else
	screen_lines=$(stty size | awk '{print $1}')
	if [ $file_lines -gt $screen_lines ]; then
		LESSCHARSET="utf-8" pager $Tempfile
	else
		cat $Tempfile
	fi
fi


exit 0