#!/bin/bash

if [ ! -f /etc/rpi-issue ]; then
    echo "This installer is intended for Raspberry Pi OS only"
    exit 1
fi

# install required packages
sudo apt update
sudo apt -y install git subversion dialog python3-dialog

if (( $(lsb_release -r | tr -dc '0-9') > 11 )); then
    # bookworm
    sudo apt -y install libraspberrypi-dev
    
    # Disable the KMS graphics driver
    sudo sed -i s/dtoverlay=vc4-kms-v3d/#dtoverlay=vc4-kms-v3d/ /boot/firmware/config.txt
    
    if ! grep -q "sdtv_mode" /boot/firmware/config.txt; then
        sudo sed -i -e $'$a\\\nsdtv_mode=2' /boot/firmware/config.txt
    fi
    
    if ! grep -q "enable_tvout" /boot/firmware/config.txt; then
        sudo sed -i -e $'$a\\\nenable_tvout=1' /boot/firmware/config.txt
    fi
else
    # System sets SD video on bootup 
    sudo sed -i s/#sdtv_mode/sdtv_mode/ /boot/config.txt

    # Disable the new KMS graphics driver in bullseye
    sudo sed -i s/dtoverlay=vc4-kms-v3d/#dtoverlay=vc4-kms-v3d/ /boot/config.txt
fi

# download the raspi-teletext git repository and compile it
git clone https://github.com/ali1234/raspi-teletext.git $HOME/raspi-teletext
cd $HOME/raspi-teletext
make

# download the vbit2 git repository
git clone https://github.com/peterkvt80/vbit2.git $HOME/vbit2
cd $HOME/vbit2

# switch to the latest release branch and compile it
latestTag=`curl --silent "https://api.github.com/repos/peterkvt80/vbit2/releases/latest" | grep -Po '"tag_name": "\K.*?(?=")'`
git checkout $latestTag
make

# create links
mkdir -p $HOME/.local/bin
ln -s -f `pwd`/vbit2 $HOME/.local/bin/
ln -s -f `pwd`/scripts/runvbit2.py $HOME/.local/bin/runvbit2
ln -s -f `pwd`/scripts/teletext-update.py $HOME/.local/bin/teletext-update
ln -s -f `pwd`/scripts/vbit-config.py $HOME/.local/bin/vbit-config

# install systemd user scripts
mkdir -p $HOME/.local/share/systemd/user
cp vbit2.service $HOME/.local/share/systemd/user
cp teletext-update.timer $HOME/.local/share/systemd/user
cp teletext-update.service $HOME/.local/share/systemd/user

mkdir -p $HOME/.config/systemd/user/
systemctl --user daemon-reload
loginctl enable-linger

if [[ ! $PATH =~ "$HOME/.local/bin" ]]; then
  PATH="$HOME/.local/bin:$PATH"
fi

vbit-config