#!/bin/bash

# to run : ./deploy_mks.sh
# This will backup the current contents of /opt/MarketData/MarketDataServer to /opt/MarketData/MarketDataServer_Rollback
# and deploy the mks binary to /opt/MarketData/MarketDataServer
# 1) Stop the mks service
# 2) Perform the backup
# 3) Perform the deployment

# set xtrace if you want to see trace level
#set -o xtrace

# use systemctl so we can bypass the pager
sudo systemctl --no-pager stop mks
sudo systemctl --no-pager status mks

# Define source and destination directories
SOURCE_DIR="/home/pi/ARM64/MarketDataServer/bin/Debug/net8.0"
DEST_DIR="/opt/MarketData/MarketDataServer"
ROLLBACK_DIR="/opt/MarketData/MarketDataServer_Rollback"

# Here begins the actual deployment process

# Check if source directory exists
if [ ! -d "$SOURCE_DIR" ]; then
  echo "Error: Source directory '$SOURCE_DIR' not found."
# use systemctl so we can bypass the pager prompts
  sudo systemctl --no-pager start mks
  exit 1
fi

# Check if destination directory exists, create if not
if [ ! -d "$DEST_DIR" ]; then
  echo "Destination directory '$DEST_DIR' not found. Creating it..."
  mkdir -p "$DEST_DIR"
fi

# Check if rollback directory exists, create if not
if [ ! -d "$ROLLBACK_DIR" ]; then
  echo "Rollback directory '$ROLLBACK_DIR' not found. Creating it..."
  mkdir -p "$ROLLBACK_DIR"
fi

# Clean the rollback folder
echo "Clean the rollback folder"
rm -rf $ROLLBACK_DIR/*
num_files=$(find "$ROLLBACK_DIR" -maxdepth 1 -type f | wc -l)
echo "Number of files after clean '$ROLLBACK_DIR': $num_files"
echo ""

# Backup current release
echo "Backup the current release"
cp -rv "$DEST_DIR"/* "$ROLLBACK_DIR"/
num_files=$(find "$ROLLBACK_DIR" -maxdepth 1 -type f | wc -l)
echo "Number of files after copy to backup '$ROLLBACK_DIR': $num_files"
echo ""

# Remove files
echo "Clean the deployment folder"
find "$DEST_DIR" -mindepth 1 -path "$DEST_DIR/logs" -prune -o -exec rm -rf {} +
num_files=$(find "$DEST_DIR" -maxdepth 1 -type f | wc -l)
echo "Number of files after clean '$DEST_DIR': $num_files"
echo ""

# Copy all files from source to destination
# The -v option provides verbose output (shows files being copied)
# The -r option is for recursive copy, useful if source_folder contains subdirectories
echo "Deploy the release candidate"
cp -rv "$SOURCE_DIR"/* "$DEST_DIR"/
num_files=$(find "$DEST_DIR" -maxdepth 1 -type f | wc -l)
echo "Number of files after deployment '$DEST_DIR': $num_files"
echo ""

echo "Files copied from '$SOURCE_DIR' to '$DEST_DIR'."

# use systemctl so we can bypass the pager prompts
sudo systemctl --no-pager restart mks
sudo systemctl --no-pager status mks

echo "Done."