#!/bin/bash

# autoSMART Node Installation Script

# Version: 1.0

# Description: Install autoSMART on target nodes (Linux systems only)

# Note: This script is called by deploy.sh and should run on target nodes

set -e

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"

INSTALL_DIR="/opt/autoSMART"

CONFIG_DIR="/etc/autosmart"

SERVICE_NAME="autosmart"

SYSTEMD_SERVICE="/etc/systemd/system/${SERVICE_NAME}.service"

# Default configuration (can be overridden by command line)

DB_HOST="${DB_HOST:-192.168.2.102}"

DB_USER="${DB_USER:-autosmart}"

DB_PASS="${DB_PASS:-autoSMART2025!}"

DB_NAME="${DB_NAME:-autosmart}"

# Node configuration

NODE_ID="${NODE_ID:-$(hostname -s)}"

SCAN_INTERVAL="${SCAN_INTERVAL:-300}"

FULL_SCAN_INTERVAL="${FULL_SCAN_INTERVAL:-3600}"

# Operation modes

UNINSTALL=false

FORCE_REINSTALL=false

CONFIG_ONLY=false

# Colors for output

RED='\033[0;31m'

GREEN='\033[0;32m'

YELLOW='\033[1;33m'

BLUE='\033[0;34m'

NC='\033[0m' # No Color

log_info() {

    echo -e "${BLUE}[INFO]${NC} $1"

}

log_success() {

    echo -e "${GREEN}[SUCCESS]${NC} $1"

}

log_warning() {

    echo -e "${YELLOW}[WARNING]${NC} $1"

}

log_error() {

    echo -e "${RED}[ERROR]${NC} $1"

}

show_usage() {

    echo "autoSMART Node Installation Script v1.0"

    echo "========================================"

    echo ""

    echo "Usage: $0 [COMMAND] [OPTIONS]"

    echo ""

    echo "Commands:"

    echo "  install               Install autoSMART on current node (default)"

    echo "  uninstall             Remove autoSMART completely from current node"

    echo ""

    echo "Options:"

    echo "  --help                Show this help message"

    echo "  --force-reinstall     Clean installation (removes previous version)"

    echo "  --config-only         Only create/update configuration files"

    echo "  --db-host HOST        Database host (default: 192.168.2.102)"

    echo "  --db-user USER        Database user (default: autosmart)"

    echo "  --db-pass PASS        Database password (default: autoSMART2025!)"

    echo "  --db-name NAME        Database name (default: autosmart)"

    echo "  --node-id ID          Node identifier (default: hostname)"

    echo "  --scan-interval SEC   Scan interval in seconds (default: 300)"

    echo ""

    echo "Note: This script should be called by deploy.sh, not run directly."

    echo "For deployment from development machine, use: deploy.sh install <IP>"

    echo ""

}

parse_arguments() {

    COMMAND="install"  # Default command

    while [[ $# -gt 0 ]]; do

        case $1 in

            install|uninstall)

                COMMAND="$1"

                shift

                ;;

            --help)

                show_usage

                exit 0

                ;;

            --force-reinstall)

                FORCE_REINSTALL=true

                shift

                ;;

            --config-only)

                CONFIG_ONLY=true

                shift

                ;;

            --db-host)

                DB_HOST="$2"

                shift 2

                ;;

            --db-user)

                DB_USER="$2"

                shift 2

                ;;

            --db-pass)

                DB_PASS="$2"

                shift 2

                ;;

            --db-name)

                DB_NAME="$2"

                shift 2

                ;;

            --node-id)

                NODE_ID="$2"

                shift 2

                ;;

            --scan-interval)

                SCAN_INTERVAL="$2"

                shift 2

                ;;

            *)

                log_error "Unknown option: $1"

                show_usage

                exit 1

                ;;

        esac

    done

}

show_header() {

    log_info "🔧 autoSMART Node Installation v1.0"

    log_info "==================================="

    log_info "Installing on target node: $(hostname)"

    log_info ""

    log_info "Operation: $COMMAND"

    log_info "Node ID: $NODE_ID"

    log_info "Database: $DB_HOST:5432/$DB_NAME"

    if [[ "$COMMAND" == "install" ]]; then

        log_info "Install Directory: $INSTALL_DIR"

        log_info "Config Directory: $CONFIG_DIR"

    fi

    log_info ""

}

check_requirements() {

    log_info "🔍 Checking system requirements..."

    # Check if running as root

    if [[ $EUID -ne 0 ]]; then

        log_error "This script must be run as root (use sudo)"

        exit 1

    fi

    # Check if running on Linux

    if [[ "$(uname)" != "Linux" ]]; then

        log_error "autoSMART can only be installed on Linux systems"

        log_error "Current system: $(uname)"

        exit 1

    fi

    # Check systemd

    if ! command -v systemctl &> /dev/null; then

        log_error "systemd is required but not found"

        exit 1

    fi

    # Check and report dependency status

    if ! verify_dependencies >/dev/null 2>&1; then

        log_warning "Some dependencies are missing (will be installed automatically)"

    fi

    # Check available space

    AVAILABLE_SPACE=$(df / | tail -1 | awk '{print $4}')

    if [[ $AVAILABLE_SPACE -lt 100000 ]]; then

        log_warning "Less than 100MB available space. Installation may fail."

    fi

    log_success "System requirements check passed"

}

handle_uninstall() {

    log_info "🗑️  Uninstalling autoSMART..."

    # Stop and disable service

    if systemctl is-active --quiet autosmart; then

        systemctl stop autosmart

    fi

    if systemctl is-enabled --quiet autosmart; then

        systemctl disable autosmart

    fi

    # Remove service file

    if [[ -f "$SYSTEMD_SERVICE" ]]; then

        rm "$SYSTEMD_SERVICE"

        systemctl daemon-reload

    fi

    # Remove installation directory

    if [[ -d "$INSTALL_DIR" ]]; then

        rm -rf "$INSTALL_DIR"

    fi

    # Remove configuration directory

    if [[ -d "$CONFIG_DIR" ]]; then

        rm -rf "$CONFIG_DIR"

    fi

    # Remove log rotation

    if [[ -f "/etc/logrotate.d/autosmart" ]]; then

        rm "/etc/logrotate.d/autosmart"

    fi

    log_success "✅ autoSMART uninstalled successfully"

    exit 0

}

# Function to check if a package is installed

check_package_installed() {

    local package="$1"

    local package_manager="$2"

    case "$package_manager" in

        "apt-get")

            dpkg -l | grep -q "^ii  $package " 2>/dev/null

            ;;

        "yum"|"dnf")

            rpm -qa | grep -q "$package" 2>/dev/null

            ;;

        "zypper")

            zypper se -i "$package" | grep -q "^i" 2>/dev/null

            ;;

        "pacman")

            pacman -Q "$package" >/dev/null 2>&1

            ;;

        *)

            return 1

            ;;

    esac

}

# Function to verify all dependencies are installed

verify_dependencies() {

    log_info "🔍 Verifying system dependencies..."

    local missing_packages=()

    local package_manager=""

    # Detect package manager

    if command -v apt-get &> /dev/null; then

        package_manager="apt-get"

    elif command -v yum &> /dev/null; then

        package_manager="yum"

    elif command -v dnf &> /dev/null; then

        package_manager="dnf"

    elif command -v zypper &> /dev/null; then

        package_manager="zypper"

    elif command -v pacman &> /dev/null; then

        package_manager="pacman"

    else

        log_warning "Unknown package manager. Dependency verification limited."

        return 1

    fi

    # Check system packages (including Perl modules from distribution)

    local system_packages=("perl" "smartmontools" "postgresql-client" "curl" "wget")

    local perl_packages=()

    # Add Perl module packages based on package manager

    case "$package_manager" in

        "apt-get")

            perl_packages+=("libdbi-perl" "libdbd-pg-perl" "libjson-perl" "libfile-slurp-perl"

                           "libgetopt-long-descriptive-perl" "libconfig-simple-perl")

            ;;

        "yum"|"dnf")

            perl_packages+=("perl-DBI" "perl-DBD-Pg" "perl-JSON" "perl-File-Slurp"

                           "perl-Getopt-Long" "perl-Config-Simple")

            ;;

        "zypper")

            perl_packages+=("perl-DBI" "perl-DBD-Pg" "perl-JSON" "perl-File-Slurp"

                           "perl-Getopt-Long-Descriptive" "perl-Config-Simple")

            ;;

        "pacman")

            perl_packages+=("perl-dbi" "perl-dbd-pg" "perl-json" "perl-file-slurp")

            ;;

    esac

    # Check system packages

    for package in "${system_packages[@]}"; do

        if ! check_package_installed "$package" "$package_manager"; then

            missing_packages+=("$package")

        fi

    done

    # Check Perl packages from distribution

    for package in "${perl_packages[@]}"; do

        if ! check_package_installed "$package" "$package_manager"; then

            missing_packages+=("$package")

        fi

    done

    # Report results

    if [[ ${#missing_packages[@]} -eq 0 ]]; then

        log_success "✅ All dependencies are available"

        return 0

    else

        log_warning "Missing dependencies detected:"

        if [[ ${#missing_packages[@]} -gt 0 ]]; then

            log_warning "  Missing packages: ${missing_packages[*]}"

        fi

        return 1

    fi

}

# Function to install dependencies

install_dependencies() {

    log_info "📦 Installing system dependencies..."

    # First check if dependencies are already installed

    if verify_dependencies >/dev/null 2>&1; then

        log_success "All dependencies already installed"

        return 0

    fi

    log_info "Installing missing dependencies..."

    if command -v apt-get &> /dev/null; then

        # Debian/Ubuntu

        log_info "Updating package lists..."

        apt-get update -qq

        PACKAGES=(

            "perl"

            "libdbi-perl"

            "libdbd-pg-perl"

            "libjson-perl"

            "libfile-slurp-perl"

            "libgetopt-long-descriptive-perl"

            "libconfig-simple-perl"

            "smartmontools"

            "postgresql-client"

            "curl"

            "wget"

        )

        for package in "${PACKAGES[@]}"; do

            if ! check_package_installed "$package" "apt-get"; then

                log_info "Installing $package..."

                if ! apt-get install -y "$package" >/dev/null 2>&1; then

                    log_error "Failed to install $package"

                    exit 1

                fi

            fi

        done

    elif command -v dnf &> /dev/null; then

        # Fedora/RHEL 8+

        log_info "Updating package lists..."

        dnf update -y -q

        PACKAGES=(

            "perl"

            "perl-DBI"

            "perl-DBD-Pg"

            "perl-JSON"

            "perl-File-Slurp"

            "perl-Getopt-Long"

            "perl-Config-Simple"

            "smartmontools"

            "postgresql"

            "curl"

            "wget"

        )

        for package in "${PACKAGES[@]}"; do

            if ! check_package_installed "$package" "dnf"; then

                log_info "Installing $package..."

                if ! dnf install -y "$package" >/dev/null 2>&1; then

                    log_error "Failed to install $package"

                    exit 1

                fi

            fi

        done

    elif command -v yum &> /dev/null; then

        # RHEL/CentOS 7

        log_info "Updating package lists..."

        yum update -y -q

        PACKAGES=(

            "perl"

            "perl-DBI"

            "perl-DBD-Pg"

            "perl-JSON"

            "perl-File-Slurp"

            "perl-Getopt-Long"

            "perl-Config-Simple"

            "smartmontools"

            "postgresql"

            "curl"

            "wget"

        )

        for package in "${PACKAGES[@]}"; do

            if ! check_package_installed "$package" "yum"; then

                log_info "Installing $package..."

                if ! yum install -y "$package" >/dev/null 2>&1; then

                    log_error "Failed to install $package"

                    exit 1

                fi

            fi

        done

    elif command -v zypper &> /dev/null; then

        # openSUSE

        log_info "Updating package lists..."

        zypper refresh -q

        PACKAGES=(

            "perl"

            "perl-DBI"

            "perl-DBD-Pg"

            "perl-JSON"

            "perl-File-Slurp"

            "perl-Getopt-Long-Descriptive"

            "perl-Config-Simple"

            "smartmontools"

            "postgresql"

            "curl"

            "wget"

        )

        for package in "${PACKAGES[@]}"; do

            if ! check_package_installed "$package" "zypper"; then

                log_info "Installing $package..."

                if ! zypper install -y "$package" >/dev/null 2>&1; then

                    log_error "Failed to install $package"

                    exit 1

                fi

            fi

        done

    elif command -v pacman &> /dev/null; then

        # Arch Linux

        log_info "Updating package lists..."

        pacman -Sy --noconfirm

        PACKAGES=(

            "perl"

            "perl-dbi"

            "perl-dbd-pg"

            "perl-json"

            "perl-file-slurp"

            "smartmontools"

            "postgresql"

            "curl"

            "wget"

        )

        for package in "${PACKAGES[@]}"; do

            if ! check_package_installed "$package" "pacman"; then

                log_info "Installing $package..."

                if ! pacman -S --noconfirm "$package" >/dev/null 2>&1; then

                    log_error "Failed to install $package"

                    exit 1

                fi

            fi

        done

    else

        log_error "Unsupported package manager. Please install dependencies manually:"

        log_error "  - perl, smartmontools, postgresql-client, curl, wget"

        log_error "  - Perl modules: DBI, DBD::Pg, JSON, File::Slurp, Getopt::Long, Config::Simple"

        exit 1

    fi

    # Verify installation was successful

    if verify_dependencies >/dev/null 2>&1; then

        log_success "✅ All dependencies installed successfully"

    else

        log_error "Some dependencies may not have installed correctly"

        exit 1

    fi

}

create_directories() {

    log_info "📁 Creating directory structure..."

    # Create main directories

    mkdir -p "$INSTALL_DIR"/{scripts,lib,config,docs}

    mkdir -p "$CONFIG_DIR"

    # Set permissions

    chmod 755 "$INSTALL_DIR"

    chmod 755 "$CONFIG_DIR"

    log_success "Directories created"

}

copy_files() {

    log_info "📋 Copying autoSMART files..."

    # Copy scripts

    if [[ -d "$PROJECT_ROOT/scripts" ]]; then

        cp -r "$PROJECT_ROOT/scripts"/* "$INSTALL_DIR/scripts/"

        chmod +x "$INSTALL_DIR/scripts"/*.sh 2>/dev/null || true

        chmod +x "$INSTALL_DIR/scripts"/*.pl 2>/dev/null || true

    fi

    # Copy libraries

    if [[ -d "$PROJECT_ROOT/lib" ]]; then

        cp -r "$PROJECT_ROOT/lib"/* "$INSTALL_DIR/lib/"

    fi

    # Copy documentation

    if [[ -d "$PROJECT_ROOT/docs" ]]; then

        cp -r "$PROJECT_ROOT/docs"/* "$INSTALL_DIR/docs/"

    fi

    # Copy SQL files

    if [[ -d "$PROJECT_ROOT/sql" ]]; then

        cp -r "$PROJECT_ROOT/sql" "$INSTALL_DIR/"

    fi

    log_success "Files copied"

}

create_configuration() {

    log_info "⚙️  Creating configuration files..."

    # Main configuration file

    cat > "$CONFIG_DIR/autosmart.conf" << EOF

# autoSMART Configuration File

# Generated on $(date)

[database]

host = $DB_HOST

port = 5432

user = $DB_USER

password = $DB_PASS

database = $DB_NAME

timeout = 30

[node]

id = $NODE_ID

scan_interval = $SCAN_INTERVAL

full_scan_interval = $FULL_SCAN_INTERVAL

store_unchanged = false

max_retries = 3

[collection]

temperature_threshold = 5

parameter_changes_only = true

enable_predictive_analysis = true

health_check_interval = 86400

[logging]

level = INFO

max_size = 10M

rotate_count = 5

syslog = true

[alerts]

enable = true

temperature_critical = 60

reallocated_sectors_warning = 1

pending_sectors_critical = 5

EOF

    # YAML format configuration for Perl daemon

    cat > "$CONFIG_DIR/cluster-$NODE_ID.conf" << EOF

# autoSMART YAML Configuration for $NODE_ID

database:

  host: $DB_HOST

  port: 5432

  user: $DB_USER

  password: $DB_PASS

  database: $DB_NAME

node:

  id: $NODE_ID

  scan_interval: $SCAN_INTERVAL

  store_unchanged: false

collection:

  temperature_threshold: 5

  parameter_changes_only: true

  full_scan_interval: $FULL_SCAN_INTERVAL

EOF

    # Set secure permissions on config files

    chmod 600 "$CONFIG_DIR"/*.conf

    log_success "Configuration created"

}

create_systemd_service() {

    log_info "🔧 Creating systemd service..."

    cat > "$SYSTEMD_SERVICE" << EOF

[Unit]

Description=autoSMART SMART Data Collector

Documentation=file://$INSTALL_DIR/docs/README.md

After=network.target postgresql.service

Wants=postgresql.service

[Service]

Type=simple

ExecStart=$INSTALL_DIR/scripts/smart-collector-daemon.pl --config $CONFIG_DIR/cluster-$NODE_ID.conf --foreground

ExecReload=/bin/kill -HUP \$MAINPID

KillMode=process

Restart=always

RestartSec=30

User=root

Group=root

# Security settings

NoNewPrivileges=true

ProtectSystem=strict

ProtectHome=true

ReadWritePaths=$CONFIG_DIR

PrivateTmp=true

# Resource limits

LimitNOFILE=1024

MemoryMax=100M

CPUQuota=10%

# Logging

StandardOutput=journal

StandardError=journal

SyslogIdentifier=autosmart

[Install]

WantedBy=multi-user.target

EOF

    # Reload systemd

    systemctl daemon-reload

    log_success "Systemd service created"

}

test_database_connection() {

    log_info "🔗 Testing database connection..."

    # Test connection using psql

    if command -v psql &> /dev/null; then

        if PGPASSWORD="$DB_PASS" psql -h "$DB_HOST" -U "$DB_USER" -d "$DB_NAME" -c "SELECT version();" >/dev/null 2>&1; then

            log_success "Database connection successful"

        else

            log_warning "Database connection failed. Service may not start correctly."

            log_info "Please ensure:"

            log_info "  • PostgreSQL server is running on $DB_HOST"

            log_info "  • Database '$DB_NAME' exists"

            log_info "  • User '$DB_USER' has proper permissions"

        fi

    else

        log_warning "psql not found. Cannot test database connection."

    fi

}

test_smart_detection() {

    log_info "🔍 Testing SMART device detection..."

    DEVICES_FOUND=0

    for device in /dev/sd? /dev/nvme?n?; do

        if [[ -b "$device" ]] && smartctl -i "$device" >/dev/null 2>&1; then

            MODEL=$(smartctl -i "$device" | grep "Device Model\|Model Number" | head -1 | cut -d: -f2 | xargs)

            if [[ -n "$MODEL" ]]; then

                log_info "  Found: $device - $MODEL"

                ((DEVICES_FOUND++))

            fi

        fi

    done

    if [[ $DEVICES_FOUND -gt 0 ]]; then

        log_success "Detected $DEVICES_FOUND SMART-capable devices"

    else

        log_warning "No SMART-capable devices detected"

    fi

}

finalize_installation() {

    log_info "🎯 Finalizing installation..."

    # Enable service (but don't start yet)

    systemctl enable "$SERVICE_NAME"

    # Create log rotation

    cat > "/etc/logrotate.d/autosmart" << EOF

/var/log/autosmart/*.log {

    daily

    rotate 7

    compress

    delaycompress

    missingok

    notifempty

    postrotate

        systemctl reload-or-restart autosmart

    endscript

}

EOF

    log_success "Installation finalized"

}

show_completion_message() {

    log_success "✅ autoSMART installation completed successfully!"

    log_info ""

    log_info "📋 Installation Summary:"

    log_info "  • Install Directory: $INSTALL_DIR"

    log_info "  • Config Directory: $CONFIG_DIR"

    log_info "  • Service Name: $SERVICE_NAME"

    log_info "  • Node ID: $NODE_ID"

    log_info ""

    log_info "🚀 Next Steps:"

    log_info "  1. Start the service:"

    log_info "     systemctl start $SERVICE_NAME"

    log_info ""

    log_info "  2. Check service status:"

    log_info "     systemctl status $SERVICE_NAME"

    log_info ""

    log_info "  3. View logs:"

    log_info "     journalctl -u $SERVICE_NAME -f"

    log_info ""

    log_info "📖 Documentation: $INSTALL_DIR/docs/README.md"

    log_info "⚙️  Configuration: $CONFIG_DIR/autosmart.conf"

    log_info ""

    log_info "🎉 autoSMART is ready to monitor your storage devices!"

}

# Main execution

main() {

    parse_arguments "$@"

    show_header

    case "$COMMAND" in

        uninstall)

            handle_uninstall

            ;;

        install)

            check_requirements

            # Handle force reinstall

            if [[ "$FORCE_REINSTALL" == true ]]; then

                log_info "🗑️  Force reinstall: cleaning previous installation..."

                handle_uninstall 2>/dev/null || true

                sleep 2

            fi

            # Handle config-only mode

            if [[ "$CONFIG_ONLY" == true ]]; then

                log_info "⚙️  Configuration-only mode"

                if [[ ! -d "$INSTALL_DIR" ]]; then

                    log_error "autoSMART is not installed. Run full installation first."

                    exit 1

                fi

                create_configuration

                log_success "✅ Configuration updated successfully!"

                exit 0

            fi

            # Full installation

            install_dependencies

            create_directories

            copy_files

            create_configuration

            create_systemd_service

            test_database_connection

            test_smart_detection

            finalize_installation

            show_completion_message

            ;;

        *)

            log_error "Unknown command: $COMMAND"

            show_usage

            exit 1

            ;;

    esac

}

# Run main function

main "$@"