#!/bin/bash

# Based on: https://gist.github.com/normandmickey/3f10fc077d15345fb469034e3697d0d0 

# command info
if [ $# -eq 0 ] || [ "$1" = "-h" ] || [ "$1" = "-help" ]; then
  echo "config script to switch BTCPay Server on or off"
  echo "bonus.btcpayserver.sh [on|off]"
  exit 1
fi

source /mnt/hdd/raspiblitz.conf

# add default value to raspi config if needed
if [ ${#BTCPayServer} -eq 0 ]; then
  echo "BTCPayServer=off" >> /mnt/hdd/raspiblitz.conf
fi
    
# stop service
echo "making sure services are not running"
sudo systemctl stop btcpayserver 2>/dev/null
sudo systemctl disable btcpayserver 2>/dev/null
  
# switch on
if [ "$1" = "1" ] || [ "$1" = "on" ]; then
  echo "*** INSTALL BTCPAYSERVER ***"

  # setting up nginx and the SSL certificate    
  /home/admin/config.scripts/bonus.btcpaysetdomain.sh
  errorOnInstall=$?
  if [ ${errorOnInstall} -eq 1 ]; then
   echo "exiting as user cancelled BTCPayServer installation"  
   exit 1
  fi 

  isInstalled=$(sudo ls /etc/systemd/system/btcpayserver.service 2>/dev/null | grep -c 'btcpayserver.service')
  if [ ${isInstalled} -eq 0 ]; then

    sudo adduser --disabled-password --gecos "" btcpay 2>/dev/null
    cd /home/btcpay
    
    # store BTCpay data on HDD
    sudo mkdir /mnt/hdd/.btcpayserver 2>/dev/null
    
    sudo mv -f /home/admin/.btcpayserver /mnt/hdd/ 2>/dev/null
    sudo rm -rf /home/admin/.btcpayserver
    sudo mv -f /home/btcpay/.btcpayserver /mnt/hdd/ 2>/dev/null
    
    sudo chown -R btcpay:btcpay /mnt/hdd/.btcpayserver
    sudo ln -s /mnt/hdd/.btcpayserver /home/btcpay/ 2>/dev/null
    
    # clean when installed as admin
    sudo rm -f /home/admin/dotnet-sdk*
    sudo rm -f /home/admin/dotnet-sdk*
    sudo rm -f /home/admin/.nbxplorer/Main/settings.config
  
    # cleanup previous installs
    sudo rm -f /home/btcpay/dotnet-sdk*
    sudo rm -f /home/btcpay/aspnetcore*
    sudo rm -rf /home/btcpay/dotnet
    sudo rm -f /usr/local/bin/dotnet
    
    sudo systemctl stop nbxplorer 2>/dev/null
    sudo systemctl disable nbxplorer 2>/dev/null
    sudo rm -f /home/btcpay/.nbxplorer/Main/settings.config
    sudo rm -f /etc/systemd/system/nbxplorer.service
    
    sudo rm -f /home/btcpay/.btcpayserver/Main/settings.config
    sudo rm -f /etc/systemd/system/btcpayserver.service
    sudo rm -f /etc/nginx/sites-available/btcpayserver
    
    echo ""
    echo "***"
    echo "Installing .NET"
    echo "***"
    echo ""
    
    # download dotnet-sdk
    sudo apt-get -y install libunwind8 gettext libssl1.0
    sudo -u btcpay wget https://download.visualstudio.microsoft.com/download/pr/94409a9a-41e3-4df9-83bc-9e23ed96abaf/2b75460d9a8eef8361c01bafc1783fab/dotnet-sdk-2.1.607-linux-arm.tar.gz
    # check binary is was not manipulated (checksum test)
    dotnetName="dotnet-sdk-2.1.607-linux-arm.tar.gz"
    binaryChecksum="2cd8fa250e6a0e81faf409e7dc4f6d581117f565d58cff48b31f457e7cafc7f3cfe0de0df2b1c5d035733879750eb2af22fcc950720a7a7192e4221318052838"
    actualChecksum=$(sha512sum /home/btcpay/${dotnetName} | cut -d " " -f1)
    if [ "${actualChecksum}" != "${binaryChecksum}" ]; then
      echo "!!! FAIL !!! Downloaded ${dotnetName} not matching SHA512 checksum: ${binaryChecksum}"
      exit 1
    fi
  
    # download aspnetcore-runtime
    sudo -u btcpay wget https://download.visualstudio.microsoft.com/download/pr/9c563df7-736b-49ce-bd17-e739f3765541/e93dd1eff909e59a7ba72784a64dc031/aspnetcore-runtime-2.1.14-linux-arm.tar.gz
    # check binary is was not manipulated (checksum test)
    aspnetcoreName="aspnetcore-runtime-2.1.14-linux-arm.tar.gz"
    binaryChecksum="f4500187bf135254a03b5eb4105b8ce20f71d71e0f08c2c2ec914920f80435b7b36351c3f9c15504d0b1c2187b904c8283db67a2b60ebff374b058641153aaac"
    actualChecksum=$(sha512sum /home/btcpay/${aspnetcoreName} | cut -d " " -f1)
    if [ "${actualChecksum}" != "${binaryChecksum}" ]; then
      echo "!!! FAIL !!! Downloaded ${aspnetcoreName} not matching SHA512 checksum: ${binaryChecksum}"
      exit 1
    fi
  
    sudo -u btcpay mkdir /home/btcpay/dotnet
    sudo -u btcpay tar -xvf ${dotnetName} -C /home/btcpay/dotnet
    sudo -u btcpay tar -xvf ${aspnetcoreName} -C /home/btcpay/dotnet
    
    # opt out of telemetry
    echo "DOTNET_CLI_TELEMETRY_OPTOUT=1" | sudo tee -a /etc/environment
    
    sudo ln -s /home/btcpay/dotnet/dotnet /usr/local/bin
    sudo -u btcpay /home/btcpay/dotnet/dotnet --info
    
    echo ""
    echo "***"
    echo "Installing NBXplorer"
    echo "***"
    echo ""
    
    cd /home/btcpay
    sudo -u btcpay git clone https://github.com/dgarage/NBXplorer.git
    cd NBXplorer
    # checkout from last known to work commit:
    # https://github.com/dgarage/NBXplorer/commit/6069d0a06aae467cab41ea509450222d45fb9c04
    # check https://github.com/dgarage/NBXplorer/commits/master
    sudo -u btcpay git checkout 6069d0a06aae467cab41ea509450222d45fb9c04
    sudo -u btcpay ./build.sh
    
    echo "
[Unit]
Description=NBXplorer daemon
Requires=bitcoind.service
After=bitcoind.service

[Service]
ExecStart=/usr/local/bin/dotnet \"/home/btcpay/NBXplorer/NBXplorer/bin/Release/netcoreapp2.1/NBXplorer.dll\" -c /home/btcpay/.nbxplorer/Main/settings.config
User=btcpay
Group=btcpay
pe=simple
PIDFile=/run/nbxplorer/nbxplorer.pid
Restart=on-failure

PrivateTmp=true
ProtectSystem=full
NoNewPrivileges=true
PrivateDevices=true

[Install]
WantedBy=multi-user.target
" | sudo tee -a /etc/systemd/system/nbxplorer.service
  
    sudo systemctl daemon-reload
    # restart to create settings.config if was running already
    sudo systemctl restart nbxplorer
    sudo systemctl enable nbxplorer
    sudo systemctl start nbxplorer
    
    echo "Checking for nbxplorer config"
    while [ ! -f "/home/btcpay/.nbxplorer/Main/settings.config" ]
      do
        echo "Waiting for nbxplorer to start - CTRL+C to abort"
        sleep 10
        hasFailed=$(sudo systemctl status nbxplorer | grep -c "Active: failed")
        if [ ${hasFailed} -eq 1 ]; then
          echo "seems like starting nbxplorer service has failed - see: systemctl status nbxplorer"
          echo "maybe report here: https://github.com/rootzoll/raspiblitz/issues/214"
        fi
    done
    
    echo ""
    echo "***"
    echo "getting RPC credentials from the bitcoin.conf"
    RPC_USER=$(sudo cat /mnt/hdd/bitcoin/bitcoin.conf | grep rpcuser | cut -c 9-)
    PASSWORD_B=$(sudo cat /mnt/hdd/bitcoin/bitcoin.conf | grep rpcpassword | cut -c 13-)
    #sudo mv /home/btcpay/.nbxplorer/Main/settings.config /home/admin/settings.config
    #sudo chown admin:admin /home/admin/settings.config
    sudo mv /home/btcpay/.nbxplorer/Main/settings.config /home/btcpay/.nbxplorer/Main/settings.config.backup
    touch /home/admin/settings.config
    sudo chmod 600 /home/admin/settings.config || exit 1
    cat >> /home/admin/settings.config <<EOF
btc.rpc.user=raspibolt
btc.rpc.password=$PASSWORD_B
EOF

    sudo mv /home/admin/settings.config /home/btcpay/.nbxplorer/Main/settings.config
    sudo chown btcpay:btcpay /home/btcpay/.nbxplorer/Main/settings.config
    sudo systemctl restart nbxplorer
    
    echo ""
    echo "***"
    echo "Installing BTCPayServer"
    echo "***"
    echo ""
    
    cd /home/btcpay
    sudo -u btcpay git clone https://github.com/btcpayserver/btcpayserver.git
    cd btcpayserver
    # https://github.com/btcpayserver/btcpayserver/releases 
    sudo -u btcpay git reset --hard v1.0.3.144 
    sudo -u btcpay ./build.sh
    
    echo "
[Unit]
Description=BtcPayServer daemon
Requires=btcpayserver.service
After=nbxplorer.service

[Service]
ExecStart=/usr/local/bin/dotnet run --no-launch-profile --no-build -c Release -p \"/home/btcpay/btcpayserver/BTCPayServer/BTCPayServer.csproj\" -- \$@
User=btcpay
Group=btcpay
Type=simple
PIDFile=/run/btcpayserver/btcpayserver.pid
Restart=on-failure

[Install]
WantedBy=multi-user.target
" | sudo tee -a /etc/systemd/system/btcpayserver.service
  
    sudo systemctl daemon-reload
    sudo systemctl enable btcpayserver
    sudo systemctl start btcpayserver
    
    # set thumbprint
    FINGERPRINT=$(openssl x509 -noout -fingerprint -sha256 -inform pem -in /home/admin/.lnd/tls.cert | cut -c 20-)
    sudo cp /mnt/hdd/lnd/data/chain/bitcoin/mainnet/admin.macaroon /home/btcpay/admin.macaroon
    sudo chown btcpay:btcpay /home/btcpay/admin.macaroon
    sudo chmod 600 /home/btcpay/admin.macaroon
    echo "
### Global settings ###
network=mainnet

### Server settings ###
port=23000
bind=127.0.0.1
externalurl=https://$YOUR_DOMAIN

### NBXplorer settings ###
BTC.explorer.url=http://127.0.0.1:24444/
BTC.lightning=type=lnd-rest;server=https://127.0.0.1:8080/;macaroonfilepath=/home/btcpay/admin.macaroon;certthumbprint=$FINGERPRINT
" | sudo -u btcpay tee -a /home/btcpay/.btcpayserver/Main/settings.config

    sudo systemctl restart btcpayserver
  else 
    echo "BTCPay Server is already installed."
    # start service
    echo "start service"
    sudo systemctl start btcpayserver 2>/dev/null
  fi 

  # setting value in raspi blitz config
  sudo sed -i "s/^BTCPayServer=.*/BTCPayServer=on/g" /mnt/hdd/raspiblitz.conf
  exit 0
fi

# switch off
if [ "$1" = "0" ] || [ "$1" = "off" ]; then

  # setting value in raspi blitz config
  sudo sed -i "s/^BTCPayServer=.*/BTCPayServer=off/g" /mnt/hdd/raspiblitz.conf

  isInstalled=$(sudo ls /etc/systemd/system/btcpayserver.service 2>/dev/null | grep -c 'btcpayserver.service')
  if [ ${isInstalled} -eq 1 ]; then
    echo "*** REMOVING BTCPAYSERVER ***"
    sudo systemctl stop btcpayserver
    sudo systemctl disable btcpayserver
    sudo rm /etc/systemd/system/btcpayserver.service
   
    sudo rm -f /home/btcpay/dotnet-sdk*
    sudo rm -f /home/btcpay/aspnetcore*
    sudo rm -rf /home/btcpay/dotnet
    sudo rm -f /usr/local/bin/dotnet
    
    sudo systemctl stop nbxplorer 2>/dev/null
    sudo systemctl disable nbxplorer 2>/dev/null
    sudo rm -f /home/btcpay/.nbxplorer/Main/settings.config
    sudo rm -f /etc/systemd/system/nbxplorer.service
    
    sudo rm -f /home/btcpay/.btcpayserver/Main/settings.config
    sudo rm -f /etc/systemd/system/btcpayserver.service
    sudo rm -f /etc/nginx/sites-available/btcpayserver    
    echo "OK BTCPayServer removed."
  else 
    echo "BTCPayServer is not installed."
  fi
  exit 0
fi

echo "FAIL - Unknown Parameter $1"
exit 1