#!/bin/bash

PROCESS_COUNT="$(pgrep fvlc | wc -l)"
if [[ $PROCESS_COUNT > 2 ]]
then
    exit 1
fi

SOURCE_DOMAIN="${1:?error: missing source argument}"
DESTINATION_FILE="${2:?error: missing destination argument}.flv"

# This loop is a hacky workaround
# When tcpdump is given the -c1 argument,
# it refuses to output the packet contents
# :-(

TEMPFILE=$(mktemp)
while [ -z "$URLHEAD" ]
do
    LOCALHOST_IP=$(ifconfig wlan0 | grep 'inet ' | awk '{print $2}')
    sudo tcpdump -vvvA -iwlan0 -s 500 \
        "tcp port 80 and src $LOCALHOST_IP" >$TEMPFILE 2>/dev/null &
    sleep 5s && kill $!
    URLHEAD=$(grep 'GET /api/player' $TEMPFILE | awk '{print $2}')
done

rm $TEMPFILE

QUERYURL="$SOURCE_DOMAIN$URLHEAD"
VIDEO_URL=$(curl $QUERYURL)
VIDEO_URL=${VIDEO_URL%\&title=*}
VIDEO_URL=${VIDEO_URL#url=}

mplayer $VIDEO_URL -dumpstream -dumpfile "$DESTINATION_FILE" 2>&1 >/dev/null & disown
notify-send -i .config/film.png "Buffering video  "

vlc "$DESTINATION_FILE"