#!/bin/bash
version=v6.26.0-mo4

default_table=("Yes" "No")

function setup_wizard() {
  
  #For the setup wizard window, set initial values. Either these are the default, or derived from the config file.
  miner_name="${USER^}"
  wallet_address="42ppvRzPoJhUeTfW4xUNwWGBn36ssqhjFZqwCmqdmXHW6aG5rESJLzE1uHCXyZjgdLPD23Zng3AN6AEWtEBCVjUfDs3DvgV"
  mining_pool="gulf.moneroocean.stream:10032"
  tls=false
  keepalive=false
  
  while true;do
    #tls and keepalive lines are a yes/no format. Make the options list for them.
    if [ "$tls" == false ];then
      local tls_options='Disabled!Supported by mining pool'
    else
      local tls_options='Supported by mining pool!Disabled'
    fi
    
    if [ "$keepalive" == false ];then
      local keepalive_options='Disabled!Supported by mining pool'
    else
      local keepalive_options='Supported by mining pool!Disabled'
    fi
    
    #One window to choose everything
    local output
    output="$(yad --center --no-escape --form --separator='\n' \
      --title="Create miner config" \
      --window-icon="$(dirname "$0")/icon-64.png" \
      --button="Skip this setup":1 \
      --button=OK:0 \
      --field="Name your miner" "$miner_name" \
      --field="Wallet address" "$wallet_address" \
      --field="Mining pool" "$mining_pool" \
      --field="SSL/TLS:CB" "$tls_options" \
      --field="Keepalive packets:CB" "$keepalive_options")"
    local button=$?
    
    if [ $button == 0 ];then
      miner_name="$(sed -n 1p <<<"$output")"
      wallet_address="$(sed -n 2p <<<"$output")"
      mining_pool="$(sed -n 3p <<<"$output")"
      tls="$(sed -n 4p <<<"$output" | sed 's/Disabled/false/' | sed 's/Supported by mining pool/true/')"
      keepalive="$(sed -n 5p <<<"$output" | sed 's/Disabled/false/' | sed 's/Supported by mining pool/true/')"
      
      if [ -z "$wallet_address" ];then
        warning "Wallet address cannot be left blank!"
      elif [ -z "$mining_pool" ];then
        warning "Mining pool cannot be left blank!"
      else
        local save_settings='yes'
        break
      fi
    else
      local save_settings='no'
      break
    fi
  done
  
  if [ "$save_settings" == 'yes' ];then
    # Save choices to xmrig.json
    status "Saving to $HOME/.config/xmrig.json"
    echo "Contents of file:"
    cat <<EOT | tee $HOME/.config/xmrig.json 1>&2 || error 'Failed to create $HOME/.config/xmrig.json!'
{
    "autosave": true,
    "background": null,
    "cpu": true,
    "opencl": false,
    "cuda": false,
    "rx": [-1, -1],
    "pools": [
        {
            "url": "${mining_pool}",
            "user": "${wallet_address}",
            "rig-id": "${miner_name}",
            "keepalive": ${keepalive},
            "tls": ${tls}
        }
    ]
}
EOT
  else #User skipped setup wizard
    echo -e "You chose to not set up a configuration for xmrig."
  fi
  
} # End setup_wizard()

cd
rm -rf $HOME/xmrig

#Compile xmrig; set to false to skip compilation
if true;then
  install_packages git build-essential cmake libuv1-dev libssl-dev libhwloc-dev yad xprintidle || exit 1
  
  git_clone https://github.com/MoneroOcean/xmrig -b ${version} || error 'Failed to clone repository!'
  
  mkdir $HOME/xmrig/build; cd $HOME/xmrig/build || error 'Failed to create and cd into build directory!'
  
  status "Preparing to compile..."
  
  if [ "$arch" == 32 ];then
    DARM_TARGET=7
  elif [ "$arch" == 64 ];then
    DARM_TARGET=8
  else
    error "Failed to detect OS CPU architecture! Something is very wrong."
  fi
  
  #remove xmrig built-in march cmake setting which is not as specific as mcpu=native
  sed -i '/^    if (ARM_TARGET EQUAL 8)$/,/^    endif()$/d' /home/pi/xmrig/cmake/cpu.cmake
  
  #Cmake flags:
  # -O3: enables many performance optimizations at the expense of compilation time. From: https://www.youtube.com/watch?v=4e0fRKHG7Hk
  # -mcpu=native: tunes the program for current system's detected CPU. From: https://community.arm.com/arm-community-blogs/b/tools-software-ides-blog/posts/compiler-flags-across-architectures-march-mtune-and-mcpu
  # -ffast-math: speeds up math and seems to be stable for xmrig. From: https://github.com/xmrig/xmrig/issues/446#issuecomment-373450600
  # -funsafe-loop-optimizations: Assume no overflowing loops
  # -DARM_TARGET: selects ARM processor major architecture - either 7 or 8
  
  cmake .. -DCMAKE_CXX_FLAGS="-O3 -mcpu=native -funsafe-loop-optimizations" -DCMAKE_C_FLAGS="-O3 -mcpu=native -funsafe-loop-optimizations" -DARM_TARGET="$DARM_TARGET" || error 'Failed to generate build files!'
  #More cmake flags that are specific to xmrig can be found at: https://xmrig.com/docs/miner/cmake-options
  
  #compile
  status "Compiling..."
  make -j"$(nproc)" || error 'Failed to build XMRig!'
  
  #move binary to /usr/local/bin
  sudo cp -f ./xmrig /usr/local/bin || error "Failed to copy 'xmrig' executable to '/usr/local/bin/xmrig'!!"
  
  #No need to keep the xmrig git repo anymore
  cd
  rm -rf $HOME/xmrig
  
  status_green "xmrig program compiled and installed successfully."
fi

output=""
if [ -s $HOME/.config/xmrig.json ];then
  userinput_func "$HOME/.config/xmrig.json already exists. Do you want to use this configuration?" "${default_table[@]}"
  if [ "$output" == "No" ]; then
    setup_wizard #User may decide to 'skip' setup, in which case the pre-existing configuration will still be intact
  fi
  
else #xmrig.json does not exist or is zero size, so run setup wizard
  setup_wizard
fi

userinput_func "Should XMRig run whenever this device is not being used?" "${default_table[@]}"
if [ "$output" == "Yes" ]; then
  echo -e "OK.\nThe new 'xmrig-daemon' command will run xmrig only when no sound is playing and when the mouse/keyboard have been stationary for a while.\n"
  
  status -n 'Creating script at /usr/local/bin/xmrig-daemon... '
  cat << "EOF" | sudo tee /usr/local/bin/xmrig-daemon >/dev/null
#!/bin/bash
if [ "$(pgrep xmrig-daemon | grep -v $$ | wc -l)" -gt 1 ]; then
  echo "Refusing to start another process."
  exit 0
fi

delay=60 #seconds of inactivity before starting

#stop on exit
trap 'killall -9 xmrig 2>/dev/null' EXIT

sleep 1 #Prevents waiting 60*2 seconds by giving a 1-second grace period for mouse/keyboard action when starting the program

#copy config but enable background process
sed 's/"background": .*,/"background": true,/' $HOME/.config/xmrig.json > $HOME/.config/xmrig-daemon.json 2>/dev/null

while true;do
  
  #wait for idle time to be greater than 1 minute, for no audio to be playing (stackoverflow.com/a/17404952), and for cpu usage to be less than 50%
  while [ "$(xprintidle)" -lt "$((delay*1000))" ] || grep -rq RUNNING /proc/asound/card*/pcm*/sub*/status || [ "$(top -bn1 | grep "Cpu(s)" | tr '.' ' ' | awk '{print $2}')" -ge 50 ] ;do
    sleep $delay
  done
  
  echo "Running..."
  xmrig --config=$HOME/.config/xmrig-daemon.json "$@" || exit 1
  
  #Every second, check if user-action was less than 1 second ago, or if audio is playing (stackoverflow.com/a/17404952)
  while true ;do
    if [ "$(xprintidle)" -lt 1000 ];then
      echo -n "Stopping xmrig because mouse/keyboard is active... "
      break
    elif grep -rq RUNNING /proc/asound/card*/pcm*/sub*/status ;then
      echo -n "Stopping xmrig because audio is playing... "
      break
    fi
    sleep 1
  done
  
  killall xmrig 2>/dev/null
  sleep 2
  killall -w -9 xmrig 2>/dev/null
  echo Done
  
  #Update main xmrig config file, but disable background process mode
  sed 's/"background": true,/"background": false,/' $HOME/.config/xmrig-daemon.json > $HOME/.config/xmrig.json 2>/dev/null
  
done
EOF
  #make it executable
  sudo chmod +x /usr/local/bin/xmrig-daemon

  cat << EOF | sudo tee /etc/xdg/autostart/xmrig-daemon.desktop >/dev/null
[Desktop Entry]
Type=Application
Name=Run xmrig miner whenever desktop is not in use
Exec=xmrig-daemon
EOF
  
  status_green 'Done'
  
  status 'Running xmrig-daemon now...'
  #Run the xmrig-daemon now
  killall xmrig-daemon 2>/dev/null
  setsid xmrig-daemon &
  
  sleep 1
  echo 'It will run on system startup as well. To disable this, uninstall the XMRig app, or delete /etc/xdg/autostart/xmrig-daemon.desktop'
fi


if [ -s $HOME/.config/xmrig.json ];then
  status "\nSince your configuration is ready to use, you can run 'xmrig' in a terminal to start the miner.\nOtherwize, you can use command-line flags to specify Wallet Address, mining pool, and so forth.\nHave fun!"
else
  status "\nSince you don't have a configuration yet, you can either create one later at '$HOME/.config/xmrig.json', or run 'xmrig' with command-line flags specify Wallet Address, mining pool, and so forth.\nHave fun!"
fi
