#!/bin/bash

#GUI interface for wwl command line application
#wwl was written by VA3DB
#17FEB2021 KM4ACK

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VERSION=2
LOGO=/usr/share/icons/PiXflat/48x48/apps/gnome-calculator.png

#get gps grid if available
if [ -f /run/user/$UID/gridinfo.txt ]; then
GPSGRID=$(cat /run/user/$UID/gridinfo.txt)
fi

#verify yad is installed on this machine
if ! hash yad 2>/dev/null; then
echo "installing yad"
sudo apt update
sudo apt-get install -y yad
fi

###########################
#	Changelog
###########################
CHANGELOG(){
version 2
	add gps if available
	add lat/long lookup
	add changelog
	build app from source
	bump version number
}

###########################
#	Menu Shortcut
###########################
MENUITEM(){
cat > /run/user/$UID/grid-calc.desktop <<EOF
[Desktop Entry]
Name=Grid Calc
GenericName=Check distance and bearing between 2 grids
Comment=Check distance and bearing between 2 grids
Exec=$HOME/bin/grid-calc
Icon=/usr/share/icons/gnome/32x32/apps/kcalc.png
Terminal=false
Type=Application
Categories=Utility;HamRadio
EOF

sudo mv /run/user/$UID/grid-calc.desktop /usr/share/applications/
}
if [ ! -f /usr/share/applications/grid-calc.desktop ]; then
MENUITEM
echo "Menu shortcut created for grid-calc"
echo "Start grid-calc from the pi menu"
exit 0
fi

###########################
#	Install Depends
###########################
INSTALL(){
yad --form --width=420 --text-align=center --center --title="Grid Calc" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>Grid Calc v $VERSION</b>\rDependencies missising!\rInstall now?" \
--button="Install Dependencies":2 \
--button="Exit":1
BUT=$?
if [ $BUT = 1 ] || [ $BUT = 252 ]; then
exit
elif [ $BUT = 2 ]; then
sudo apt update | yad --center --progress --pulsate --auto-close --no-buttons --text-align=center --title="Grid Calc" \
--text="Updateing Repository....This may take a few minutes\r<b>DO NOT CLOSE THIS WINDOW</b>\rDoing so will abort the process.\rThis window will auto close when the process completes"

sudo apt install -y wwl bc | yad --center --progress --pulsate --auto-close --no-buttons --text-align=center --title="Grid Calc" \
--text="Getting Depends....This may take a few minutes\r<b>DO NOT CLOSE THIS WINDOW</b>\rDoing so will abort the download.\rThis window will auto close when the process completes"

fi
}


if ! hash bc 2>/dev/null; then
INSTALL
fi

if ! hash wwl 2>/dev/null; then
	if [ -f /usr/local/man/man1/locator.1.gz ]; then
	sudo rm /usr/local/man/man1/locator.1.gz
	fi
cd $HOME/Downloads
echo "checking for latest wwl package"
LATEST=$(curl -s http://www.db.net/downloads/ | grep wwl | awk '{print $2}' | sed 's/href="//;s/">//')
DIR=$(echo $LATEST | sed 's/.tgz//')
echo $DIR
echo "downloading latest wwl package"
wget http://www.db.net/downloads/$LATEST
tar -xvf $LATEST
cd $HOME/Downloads/$DIR
echo "building wwl"
make && sudo make install
echo "build done...cleaning up"
rm -rf $HOME/Downloads/$DIR
rm $HOME/Downloads/$LATEST
fi

if [ ! -f /usr/local/bin/locator ]; then
	if [ -f /usr/local/man/man1/locator.1.gz ]; then
	sudo rm /usr/local/man/man1/locator.1.gz
	fi
cd $HOME/Downloads
echo "checking for latest wwl package"
LATEST=$(curl -s http://www.db.net/downloads/ | grep wwl | awk '{print $2}' | sed 's/href="//;s/">//')
DIR=$(echo $LATEST | sed 's/.tgz//')
echo $DIR
echo "downloading latest wwl package"
wget http://www.db.net/downloads/$LATEST
tar -xvf $LATEST
cd $HOME/Downloads/$DIR
echo "building wwl"
make && sudo make install
echo "build done...cleaning up"
rm -rf $HOME/Downloads/$DIR
rm $HOME/Downloads/$LATEST
fi

###########################
#	Locator
###########################
LOCATOR(){
LOCATOR=$(yad --form --width=420 --text-align=center --center --title="Grid Calc" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>Grid Calc v $VERSION</b>\rGet Lat-Long\rfrom a grid square" \
--field="Grid" \
--button="Continue":2 \
--button="Exit":1)
BUT=$?

GRID=$(echo $LOCATOR | awk -F "|" '{print $1}')

if [ $BUT = 252 ] || [ $BUT = 1 ]; then
exit
elif [ $BUT = 2 ]; then
CORD=$(locator $GRID)
fi



LONG=$(echo $CORD | awk '{print $7}')
LONG1=$(echo $CORD | awk '{print $6}' | sed 's/(//;s/)//')
LONG2="$LONG $LONG1"

LAT=$(echo $CORD | awk '{print $11}')
LAT1=$(echo $CORD | awk '{print $10}' | sed 's/(//;s/)//')
LAT2="$LAT $LAT1"

yad --form --width=420 --text-align=center --center --title="Grid Calc" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>Grid Calc v $VERSION</b>\r\rLatitude is $LAT2\rLongitude is $LONG2" \
--button="Main Menu":2 \
--button="Exit":1
BUT=$?

if [ $BUT = 252 ] || [ $BUT = 1 ]; then
exit
fi


}


###########################
#	Main Application
###########################
CALC(){
GRIDS=$(yad --form --width=420 --text-align=center --center --title="Grid Calc" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>Grid Calc v $VERSION</b>\rEnter the two grids\rto be calculated" \
--field="Your Grid" "$GPSGRID" \
--field="Other Grid" \
--button="Grid to Lat-Long":3 \
--button="Calculate":2 \
--button="Exit":1)
BUT=$?

if [ $BUT = 252 ] || [ $BUT = 1 ]; then
exit
elif [ $BUT = 3 ]; then
LOCATOR
CALC
fi

MYGRID=$(echo $GRIDS | awk -F "|" '{print $1}')
GRID2=$(echo $GRIDS | awk -F "|" '{print $2}')

RESULTS=$(wwl $MYGRID $GRID2)
DISTANCE=$(echo $RESULTS | awk '{print $2}')
DEGREES=$(echo $RESULTS | awk '{print $5}')
#MILES=$(bc -l <<< "$DISTANCE*.6213712" | cut -c 1-5)
MILES=$(bc -l <<< "$DISTANCE*.6213712" | xargs printf "%.2f\n")

yad --form --width=420 --text-align=center --center --title="Grid Calc" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>Grid Calc v $VERSION</b>\rRESULTS" \
--field="Distance is $DISTANCE Kilometers or $MILES Miles":LBL \
--field="Bearing is $DEGREES Degrees":LBL \
--button="Calulate Another":2 \
--button="Exit":1
BUT=$?
if [ $BUT = 1 ] || [ $BUT = 252 ]; then
exit
elif [ $BUT = 2 ]; then
CALC
fi

}
CALC