#!/bin/bash
set -e

# Load configuration
CONFIG_FILE="${CONFIG_FILE:-config.local.env}"
if [ ! -f "$CONFIG_FILE" ]; then
    CONFIG_FILE="config.env"
fi

if [ ! -f "$CONFIG_FILE" ]; then
    echo "ERROR: Configuration file not found. Please create config.local.env or config.env"
    exit 1
fi

# shellcheck disable=SC1090
source "$CONFIG_FILE"

echo "Checking drift between git repo and live server..."
echo "  Comparing: $GIT_RSYSLOG_MAIN_CONFIG ↔ $RSYSLOG_MAIN_CONFIG"
echo "  Comparing: $GIT_RSYSLOG_CONFIG_DIR ↔ $RSYSLOG_CONFIG_DIR"

DIFF_FOUND=0

echo
echo "Comparing $RSYSLOG_MAIN_CONFIG"
if ! diff -u "$GIT_RSYSLOG_MAIN_CONFIG" "$RSYSLOG_MAIN_CONFIG"; then
  DIFF_FOUND=1
fi

echo
echo "Comparing $RSYSLOG_CONFIG_DIR configs"
for file in "$GIT_RSYSLOG_CONFIG_DIR"/*.conf; do
  base=$(basename "$file")
  target="$RSYSLOG_CONFIG_DIR/$base"

  if [ ! -f "$target" ]; then
    echo "Missing on server: $target"
    DIFF_FOUND=1
    continue
  fi

  if ! diff -u "$file" "$target"; then
    DIFF_FOUND=1
  fi
done

if [ "$DIFF_FOUND" -eq 0 ]; then
  echo
  echo "No drift detected."
  exit 0
else
  echo
  echo "Drift detected!"
  exit 1
fi