#!/bin/bash

# First argument is the link to the deb file to download
function download_install_deb() {
    wget -O /tmp/installer.deb "$1"
    dpkg -i /tmp/installer.deb || apt install -f -y
    rm /tmp/installer.deb
}

(
    set -e

    if [ "$EUID" -ne 0 ]; then
        echo "Please run with sudo command."
        echo "NOTICE: DO NOT RUN THIS IN LOG IN SHELL WHEN LOGGING IN AS ROOT!"
        echo "YOUR \`logname\` OUTPUT MUST BE THE DESIRED USER PROGRAMS SHOULD BE INSTALLED FOR"
        false
    fi

    USERNAME=$(logname)

    # MACROS
    APT_INSTALL="apt install -y"
    APT_INSTALL_SUGGESTS="apt install --install-suggests -y"
    APT_AUTOPURGE="apt autoremove --purge -y"

    USERAPPDIR="/home/$USERNAME/.userapps"
    USERBINDIR="/home/$USERNAME/.local/bin"

    # Creating directories in home to host custom applications and commands
    mkdir -p "$USERAPPDIR"
    mkdir -p "$USERBINDIR"

    # Updating repositories before starting
    apt update

    # Removing snap and installing gnome-software without snap support
    # (exactly in this order, do not change)
    $APT_AUTOPURGE snapd
    $APT_INSTALL_SUGGESTS gnome-software
    $APT_AUTOPURGE gnome-software-plugin-snap snapd

    # Remove thunderbird, I just like evolution better
    $APT_AUTOPURGE thunderbird

    # Install some programs and utilities (NO SUGGESTIONS)
    $APT_INSTALL htop mesa-utils mlocate tree build-essential git gnome-tweak-tool \
        hwloc cpufrequtils stress gparted gnuplot grub-customizer module-assistant \
        apt-file linux-headers-generic manpages-posix manpages-posix-dev colordiff \
        valgrind curl vlc chrome-gnome-shell screen xclip

    # Install some programs and utilities (SUGGESTIONS INCLUDED)
    $APT_INSTALL_SUGGESTS evolution p7zip-full cmake gimp audacity peek

    # Install Telegram Desktop
    wget -O /tmp/telegram-desktop.tar.xz https://telegram.org/dl/desktop/linux
    tar -xf /tmp/telegram-desktop.tar.xz --directory "$USERAPPDIR"
    ln -fs "$USERAPPDIR/Telegram/Telegram" "$USERBINDIR/telegram"
    # Otherwise Telegram is recognized automatically in the next reboot

    echo ""
    echo "Telegram Desktop installed as \`$USERBINDIR/telegram\`, to create corresponding desktop file run \`telegram\`"
    echo "NOTICE: until your next logout/login there could be some problems if \`$USERBINDIR\` did not exist before running this utility!"
    echo ""

    # In order: Discord, Google Chrome, VSCode, Skype For Linux

    download_install_deb "https://discordapp.com/api/download?platform=linux"
    download_install_deb "https://go.microsoft.com/fwlink/?LinkID=760868"
    download_install_deb "https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb"
    download_install_deb "https://go.skype.com/skypeforlinux-64.deb"

    # Installing Spotify
    # NOTICE: requires curl for some reason!
    # TODO: test if using the following commented line works too when run as root
    # wget -nv -O- "https://download.spotify.com/debian/pubkey.gpg" | apt-key add -
    curl -sS "https://download.spotify.com/debian/pubkey.gpg" | apt-key add -
    echo "deb http://repository.spotify.com stable non-free" | tee /etc/apt/sources.list.d/spotify.list

    # Get Spotify repo info
    apt update
    $APT_INSTALL spotify-client

    # Use this only if you have a high-resolution screen (works only after logout/login)
    cat >"$USERBINDIR/spotify" <<EOF
#!/bin/sh
exec /usr/bin/spotify --force-device-scale-factor=1.5 "$@"
EOF

    chmod +x "$USERBINDIR/spotify"

    # Installing Calibre ebook library
    wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sh /dev/stdin

    # Remember to run:
    # git config --global user.name "Gabriele Ara"
    # git config --global user.email "gabriele.ara@live.it"
    # git config --global user.signingKey #################
    # git config --global commit.gpgsign true

    # At the moment I'm writing this, Node.js 12.X is the recommended LTS version
    curl -sL https://deb.nodesource.com/setup_12.x | bash -
    $APT_INSTALL_SUGGESTS nodejs
    npm install -g nativefier

    # Download the webinstall script
    git clone "https://gist.github.com/684882880c8c057858732b5e40032aa8.git" /tmp/webinstall
    cp /tmp/webinstall/webinstall "$USERBINDIR/webinstall"
    chmod +x "$USERBINDIR/webinstall"
    rm -rf /tmp/webinstall/

    # Very important, do not forget when done running as superuser!
    chown -R $USERNAME:$USERNAME "$USERAPPDIR"
    chown -R $USERNAME:$USERNAME "$USERBINDIR"

    # Hopefully this will run as the desired user, installing in his home directory
    runuser -l $USERNAME -c "$USERBINDIR/webinstall -n 'WhatsApp' --tray --single-instance --honest 'https://web.whatsapp.com'"
    runuser -l $USERNAME -c "$USERBINDIR/webinstall -n 'Overleaf' --honest 'https://overleaf.com'"

    # Updating software one last time
    apt update
    apt full-upgrade -y

    echo "Software installed and updated!"
    echo "I suggest rebooting your machine and run \`sudo $APT_AUTOPURGE\` AFTER rebooting your system"

    # # Extra: if you want ZSH run this too, then logout and login:
    # $APT_INSTALL_SUGGESTS zsh
    # usermod -s $(which zsh) "$USER"
    # # If you are already logged as yourself simply run `chsh -s $(which zsh)`, then logout/login

    # # When inside ZSH for the first sime, press 2, then, as soon as you get a shell, type this:
    # sh -c "$(wget https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh -O -)"
    # # Well done, now you have ZSH and Oh-my-ZSH installed
    
    # If you want to install LaTeX locally (requires about 5GB)
    # $APT_INSTALL texlive-full
    # $APT_INSTALL lyx

    # If you want to install Rust and Cargo (works after logout/login)
    # curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
)