#!/usr/bin/env bash

case $OSTYPE in
    darwin*)
        # Comes preinstalled on MacOS
        sudo launchctl load -w /System/Library/LaunchDaemons/ssh.plist
        ;;
    linux*)
        if [[ -f /etc/arch-release ]]; then
            sudo pacman --needed --noconfirm -S openssh
            sudo systemctl enable sshd.service
            sudo systemctl start sshd.service
        elif [[ -f /etc/debian_version ]]; then
            sudo apt-get install -y openssh-server
            sudo service ssh start
            sudo update-rc.d ssh defaults
        fi
        ;;
esac

sshconf=/etc/ssh/sshd_config
sudo sed -i 's/^#\(AllowTcpForwarding\).*/\1 yes/;
             s/^#\(RSAAuthentication\).*/\1 yes/;
             s/^#\(PubkeyAuthentication\).*/\1 yes/;
             s/^#\(PasswordAuthentication\).*/\1 no/;
             s/^#\(PermitRootLogin\).*/\1 no/;
            ' "$sshconf"

# Enable X11 forwarding on desktop PCs (not remotes)
if [[ $OSTYPE == darwin* || -f /etc/arch-release ]]; then
    sudo sed -i 's/^#\(X11Forwarding\).*/\1 yes/;
                 s/^#\(X11DisplayOffset.*\)/\1/;
                 s/^#\(X11UseLocalhost\).*/\1 yes/;
                 ' "$sshconf"
fi