#!/bin/bash

# HBLINK3 DOCKER UNINSTALL SCRIPT V2.0
# Version 13122025
# This script written by Shane Daley M0VUB. 
# This script gracefully removes HBlink3 installation and all related components.

#   Copyright (C) 2020-2025 Shane P. Daley  M0VUB <shane@freestar.network>
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.

# Root check
if [ "$EUID" -ne 0 ];
then
  echo ""
  echo "You Must be root to run this script!!"
  exit 1
fi

clear

echo "*************************************************************************"
echo ""
echo "              HBlink3 Docker Installation Uninstaller                    "
echo ""
echo "*************************************************************************"
echo ""
echo "WARNING: This will remove ALL HBlink3 components including:"
echo "  - HBlink3 Docker containers and images"
echo "  - HBMonv2 Dashboard"
echo "  - Configuration files (/etc/hblink3)"
echo "  - Log files (/var/log/hblink)"
echo "  - Control scripts (/usr/local/sbin/hblink-*)"
echo "  - Systemd services"
echo "  - Cron jobs"
echo ""
echo "NOTE: Docker, Apache2, PHP, and system packages will NOT be removed."
echo ""
read -p "Are you sure you want to continue? (yes/no): " confirm

if [ "$confirm" != "yes" ]; then
    echo "Uninstall cancelled."
    exit 0
fi

echo ""
echo "Starting uninstallation process..."
echo ""

# Stop services
echo "------------------------------------------------------------------------------"
echo "Stopping HBlink3 services..."
echo "------------------------------------------------------------------------------"

if [ -d "/etc/hblink3" ]; then
    cd /etc/hblink3
    if [ -f "docker-compose.yml" ]; then
        echo "Stopping HBlink3 Docker container..."
        docker-compose down 2>/dev/null || true
    fi
fi

if systemctl is-active --quiet hbmon; then
    echo "Stopping HBMonv2 service..."
    systemctl stop hbmon
fi

if systemctl is-enabled --quiet hbmon 2>/dev/null; then
    echo "Disabling HBMonv2 service..."
    systemctl disable hbmon
fi

# Remove Docker containers and images
echo ""
echo "------------------------------------------------------------------------------"
echo "Removing HBlink3 Docker containers and images..."
echo "------------------------------------------------------------------------------"

if [ -x "$(command -v docker)" ]; then
    # Remove hblink container if it exists
    if docker ps -a | grep -q hblink; then
        echo "Removing hblink container..."
        docker rm -f hblink 2>/dev/null || true
    fi
    
    # Remove hblink images
    hblink_images=$(docker images | grep -i hblink | awk '{print $3}')
    if [ ! -z "$hblink_images" ]; then
        echo "Removing HBlink Docker images..."
        docker rmi -f $hblink_images 2>/dev/null || true
    fi
fi

# Remove systemd service files
echo ""
echo "------------------------------------------------------------------------------"
echo "Removing systemd service files..."
echo "------------------------------------------------------------------------------"

if [ -f "/lib/systemd/system/hbmon.service" ]; then
    echo "Removing hbmon.service..."
    rm -f /lib/systemd/system/hbmon.service
    systemctl daemon-reload
fi

# Remove cron jobs
echo ""
echo "------------------------------------------------------------------------------"
echo "Removing cron jobs..."
echo "------------------------------------------------------------------------------"

if [ -f "/etc/cron.daily/lastheard" ]; then
    echo "Removing lastheard cron job..."
    rm -f /etc/cron.daily/lastheard
fi

# Remove control scripts
echo ""
echo "------------------------------------------------------------------------------"
echo "Removing control scripts..."
echo "------------------------------------------------------------------------------"

echo "Removing HBlink control scripts from /usr/local/sbin..."
rm -f /usr/local/sbin/hblink-menu
rm -f /usr/local/sbin/hblink-flush
rm -f /usr/local/sbin/hblink-update
rm -f /usr/local/sbin/hblink-upgrade
rm -f /usr/local/sbin/hblink-stop
rm -f /usr/local/sbin/hblink-start
rm -f /usr/local/sbin/hblink-restart
rm -f /usr/local/sbin/hblink-initial-setup
rm -f /usr/local/sbin/hblink-uninstall

# Backup configurations before removal
echo ""
echo "------------------------------------------------------------------------------"
echo "Creating backup of configuration files..."
echo "------------------------------------------------------------------------------"

backup_dir="/root/hblink3-backup-$(date +%Y%m%d-%H%M%S)"
mkdir -p "$backup_dir"

if [ -d "/etc/hblink3" ]; then
    echo "Backing up /etc/hblink3 to $backup_dir..."
    cp -r /etc/hblink3 "$backup_dir/" 2>/dev/null || true
fi

if [ -d "/opt/HBMonv2" ]; then
    echo "Backing up /opt/HBMonv2/config.py to $backup_dir..."
    mkdir -p "$backup_dir/HBMonv2"
    cp /opt/HBMonv2/config.py "$backup_dir/HBMonv2/" 2>/dev/null || true
fi

# Remove directories
echo ""
echo "------------------------------------------------------------------------------"
echo "Removing installation directories..."
echo "------------------------------------------------------------------------------"

if [ -d "/etc/hblink3" ]; then
    echo "Removing /etc/hblink3..."
    rm -rf /etc/hblink3
fi

if [ -d "/opt/HBMonv2" ]; then
    echo "Removing /opt/HBMonv2..."
    rm -rf /opt/HBMonv2
fi

if [ -d "/var/log/hblink" ]; then
    echo "Removing /var/log/hblink..."
    rm -rf /var/log/hblink
fi

if [ -d "/opt/tmp" ]; then
    echo "Removing /opt/tmp..."
    rm -rf /opt/tmp
fi

# Restore default Apache index
echo ""
echo "------------------------------------------------------------------------------"
echo "Restoring default Apache index page..."
echo "------------------------------------------------------------------------------"

if [ -f "/var/www/html/index_APACHE.html" ]; then
    echo "Restoring original index.html..."
    cd /var/www/html
    rm -f index.html
    mv index_APACHE.html index.html 2>/dev/null || true
fi

# Remove HBMonv2 dashboard files
if [ -f "/var/www/html/info.php" ]; then
    echo "Removing HBMonv2 dashboard files from /var/www/html..."
    # Remove only HBMonv2 specific files, not entire www directory
    cd /var/www/html
    rm -f info.php lastheard.php talkgroups.php *.js 2>/dev/null || true
    rm -rf css/ fonts/ img/ include/ scripts/ 2>/dev/null || true
fi

# Final cleanup
echo ""
echo "------------------------------------------------------------------------------"
echo "Final cleanup..."
echo "------------------------------------------------------------------------------"

# Restart Apache to apply changes
if systemctl is-active --quiet apache2; then
    echo "Restarting Apache2..."
    systemctl restart apache2
fi

echo ""
echo "*************************************************************************"
echo ""
echo "              HBlink3 Uninstallation Complete!                           "
echo ""
echo "  All HBlink3 components have been removed from your system.             "
echo ""
echo "  Configuration backups saved to: $backup_dir"
echo ""
echo "  The following were NOT removed (if you want to remove them manually):  "
echo "    - Docker (docker-ce, docker-ce-cli, containerd.io)                   "
echo "    - Docker Compose                                                      "
echo "    - Apache2                                                             "
echo "    - PHP and PHP modules                                                 "
echo "    - Python3 and pip3                                                    "
echo "    - System packages (git, curl, wget, etc.)                             "
echo ""
echo "  To remove Docker completely, run:                                       "
echo "    apt-get remove docker-ce docker-ce-cli containerd.io docker-compose  "
echo "    rm -rf /var/lib/docker                                                "
echo ""
echo "*************************************************************************"
echo ""
echo "Thank you for using HBlink3 Docker Installer!"
echo ""

exit 0