#!/bin/bash
# install_service.sh - Installs the inventory system as a systemd service

if [[ $EUID -ne 0 ]]; then
   echo "🚫 This script must be run as root (use sudo)"
   exit 1
fi

echo "⚙️  Installing TFM aInventory as a Systemd service..."

# Detect working directory
WORKING_DIR="$(pwd)"

# Detect Docker binary
DOCKER_BIN=$(which docker)
if [ -z "$DOCKER_BIN" ]; then
    echo "❌ Docker not found! Please install Docker first."
    exit 1
fi

# Determine if we use 'docker compose' or legacy 'docker-compose'
if docker compose version >/dev/null 2>&1; then
    DOCKER_CMD="$DOCKER_BIN"
    COMP_VER="v2 (plugin)"
else
    DOCKER_BIN=$(which docker-compose)
    if [ -z "$DOCKER_BIN" ]; then
        echo "❌ neither 'docker compose' nor 'docker-compose' found!"
        exit 1
    fi
    DOCKER_CMD="$DOCKER_BIN"
    COMP_VER="v1 (legacy)"
fi

echo "✅ Found $COMP_VER at $DOCKER_CMD"

# Create the final service file from template
TEMPLATE="inventory.service.template"
TARGET="/etc/systemd/system/inventory.service"

if [ ! -f "$TEMPLATE" ]; then
    echo "❌ Template file $TEMPLATE not found in current directory!"
    exit 1
fi

sed "s|__WORKING_DIR__|$WORKING_DIR|g; s|__DOCKER_BIN__|$DOCKER_CMD|g" "$TEMPLATE" > "$TARGET"

echo "📝 Service file created at $TARGET"

# Reload and enable
systemctl daemon-reload
systemctl enable inventory.service

echo ""
echo "🚀 TFM aInventory service installed and enabled!"
echo "   Commands:"
echo "   👉 sudo systemctl start inventory"
echo "   👉 sudo systemctl status inventory"
echo "   👉 sudo systemctl stop inventory"
echo ""
echo "Note: The service is currently ENABLED to start on boot, but NOT started."
echo "      Run 'sudo systemctl start inventory' to launch it now."