#!/bin/bash

base="`dirname "$0"`"

if [ ! -d "$base" -o ! -f "$base/netdata.c" -o ! -d "$base/web" ]
then
	echo >&2 "Cannot find my home directory '${base}'."
	exit 1
fi
cd "$base" || exit 1

# the detail of the data that will be kept in netdata
NETDATA_CONFIG_INTERNAL_UPDATE_EVERY=1

# how many entries to keep in memory
NETDATA_CONFIG_INTERNAL_HISTORY_LINES=2400

# the user to run netdata under
NETDATA_CONFIG_USER=nobody

# set to 1, to enable debugging
NETDATA_CONFIG_DEBUG=0

# our port
NETDATA_CONFIG_PORT=19999

# get user configuration
if [ -f netdata.conf ]
then
	. netdata.conf
fi

echo "Stopping a (possibly) running netdata..."
killall netdata 2>/dev/null
killall tc-all.sh 2>/dev/null
sleep 2

echo "Compiling netdata"
if [ $NETDATA_CONFIG_DEBUG -eq 1 ]
then
	ulimit -c unlimited
	gcc -Wall -ggdb -o netdata netdata.c -lpthread -lz || exit 1
	debug_opts="-df 0xfffffedf -dl netdata.log"
else
	gcc -Wall -O3 -o netdata netdata.c -lpthread -lz || exit 1
	debug_opts=
fi

NETDATA_TITLE_DEFAULT=
NETDATA_PRIORITY_DEFAULT=

# exporting NETDATA variables to netdata
export `set 2>&1 | grep ^NETDATA_TITLE_ `
export `set 2>&1 | grep ^NETDATA_PRIORITY_ `

echo "Starting netdata"
if [ "$USER" = "root" ]
then
	chown -R "$NETDATA_CONFIG_USER" web || exit 1
	chmod    0775 web   || exit 1
	chmod -R 0664 web/* || exit 1
	`pwd`/netdata $debug_opts -d -u $NETDATA_CONFIG_USER -t $NETDATA_CONFIG_INTERNAL_UPDATE_EVERY -l $NETDATA_CONFIG_INTERNAL_HISTORY_LINES -p $NETDATA_CONFIG_PORT || exit 1
else
	echo >&2 "WARNING: NOT RUNNING AS ROOT - CANNOT SWITCH TO USER $NETDATA_CONFIG_USER"
	echo >&2 "WARNING: MAKE SURE FILES IN web/ ARE OWNED BY $USER - or it will not work"
	`pwd`/netdata $debug_opts -d -t $NETDATA_CONFIG_INTERNAL_UPDATE_EVERY -l $NETDATA_CONFIG_INTERNAL_HISTORY_LINES -p $NETDATA_CONFIG_PORT || exit 1
fi
sleep 2

if [ "$USER" = "root" ]
then
	chown -R "$NETDATA_CONFIG_USER" web || exit 1
	chmod    0775 web   || exit 1
	chmod -R 0664 web/* || exit 1
fi

# merge the server variables into the config
eval "`wget -O -  http://localhost:$NETDATA_CONFIG_PORT/envlist 2>/dev/null | tr " " "_" `"

# save config back
set 2>/dev/null |grep ^NETDATA_CONFIG_		>netdata.conf
set 2>/dev/null |grep ^NETDATA_PRIORITY_	>>netdata.conf
set 2>/dev/null |grep ^NETDATA_TITLE_		>>netdata.conf

echo "All Done."
echo "Just hit http://127.0.0.1:$NETDATA_CONFIG_PORT/ from your browser."
echo
echo "You can edit config options in file netdata.conf"
echo