#!/bin/bash

################################################################################
# Plex Media Server Management Script
################################################################################
#
# Author: Peter Wood <peter@peterwood.dev>
# Description: Modern, user-friendly Plex Media Server management script with
#              styled output and comprehensive service control capabilities.
#              Provides an interactive interface for common Plex operations.
#
# Features:
#   - Service start/stop/restart/status operations
#   - Web interface launcher
#   - Styled console output with Unicode symbols
#   - Service health monitoring
#   - Process management and monitoring
#   - Interactive menu system
#
# Related Scripts:
#   - backup-plex.sh: Comprehensive backup solution
#   - restore-plex.sh: Backup restoration utilities
#   - monitor-plex-backup.sh: Backup system monitoring
#   - validate-plex-backups.sh: Backup validation tools
#   - test-plex-backup.sh: Testing framework
#
# Usage:
#   ./plex.sh start     # Start Plex service
#   ./plex.sh stop      # Stop Plex service
#   ./plex.sh restart   # Restart Plex service
#   ./plex.sh status    # Show service status
#   ./plex.sh web       # Open web interface
#   ./plex.sh           # Interactive menu
#
# Dependencies:
#   - systemctl (systemd service management)
#   - Plex Media Server package
#   - Web browser (for web interface launching)
#
# Exit Codes:
#   0 - Success
#   1 - General error
#   2 - Service operation failure
#   3 - Invalid command or option
#
################################################################################

# 🎬 Plex Media Server Management Script
# A sexy, modern script for managing Plex Media Server with style
# Author: acedanger
# Version: 2.0

set -euo pipefail

# 🎨 Color definitions for sexy output
readonly RED='\033[0;31m'
readonly GREEN='\033[0;32m'
readonly YELLOW='\033[1;33m'
readonly BLUE='\033[0;34m'
readonly PURPLE='\033[0;35m'
readonly CYAN='\033[0;36m'
readonly WHITE='\033[1;37m'
readonly BOLD='\033[1m'
readonly DIM='\033[2m'
readonly RESET='\033[0m'

# 🔧 Configuration
readonly PLEX_SERVICE="plexmediaserver"
SCRIPT_NAME="$(basename "$0")"
readonly SCRIPT_NAME
SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
readonly SCRIPT_DIR

# 🎭 ASCII symbols for compatible output
readonly CHECKMARK="[✓]"
readonly CROSS="[✗]"
readonly ROCKET="[>]"
readonly STOP_SIGN="[■]"
readonly RECYCLE="[~]"
readonly INFO="[i]"
readonly HOURGLASS="[*]"
readonly SPARKLES="[*]"

# 📊 Function to print fancy headers
print_header() {
    echo -e "\n${PURPLE}${BOLD}+==============================================================+${RESET}"
    echo -e "${PURPLE}${BOLD}|                    [*] PLEX MEDIA SERVER [*]                |${RESET}"
    echo -e "${PURPLE}${BOLD}+==============================================================+${RESET}\n"
}

# 🎉 Function to print completion footer
print_footer() {
    echo -e "\n${DIM}${CYAN}--- Operation completed [*] ---${RESET}\n"
}

# 🎯 Function to print status with style
print_status() {
    local status="$1"
    local message="$2"
    local color="$3"
    echo -e "${color}${BOLD}[${status}]${RESET} ${message}"
}

# ⏱️ Function to show loading animation
show_loading() {
    local message="$1"
    local pid="$2"
    local spin='-\|/'
    local i=0

    echo -ne "${CYAN}${HOURGLASS} ${message}${RESET}"
    while kill -0 "$pid" 2>/dev/null; do
        i=$(( (i+1) %4 ))
        printf "\r%s%s %s %s%s" "${CYAN}" "${HOURGLASS}" "${message}" "${spin:$i:1}" "${RESET}"
        sleep 0.1
    done
    printf "\r%s%s %s %s%s\n" "${CYAN}" "${HOURGLASS}" "${message}" "${CHECKMARK}" "${RESET}"
}

# 🔧 Function to repair database issues
repair_database() {
    print_status "${INFO}" "Attempting to repair Plex database..." "${BLUE}"
    
    local db_dir="/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases"
    local main_db="$db_dir/com.plexapp.plugins.library.db"
    local backup_db="$db_dir/com.plexapp.plugins.library.db.backup.$(date +%Y%m%d_%H%M%S)"
    
    if [[ ! -f "$main_db" ]]; then
        print_status "${CROSS}" "Main database not found at: $main_db" "${RED}"
        return 1
    fi
    
    # Stop Plex service first
    print_status "${INFO}" "Stopping Plex service..." "${BLUE}"
    sudo systemctl stop "$PLEX_SERVICE" 2>/dev/null || true
    sleep 2
    
    # Create backup of current database
    print_status "${INFO}" "Creating backup of current database..." "${BLUE}"
    if ! sudo cp "$main_db" "$backup_db"; then
        print_status "${CROSS}" "Failed to create database backup!" "${RED}"
        return 1
    fi
    
    print_status "${CHECKMARK}" "Database backed up to: $backup_db" "${GREEN}"
    
    # Try to vacuum the database
    print_status "${INFO}" "Running VACUUM on database..." "${BLUE}"
    if sudo -u plex sqlite3 "$main_db" "VACUUM;"; then
        print_status "${CHECKMARK}" "Database VACUUM completed successfully" "${GREEN}"
        
        # Test integrity again
        if sudo -u plex sqlite3 "$main_db" "PRAGMA integrity_check;" | grep -q "ok"; then
            print_status "${CHECKMARK}" "Database integrity restored!" "${GREEN}"
            print_status "${INFO}" "You can now try starting Plex again" "${BLUE}"
            return 0
        else
            print_status "${CROSS}" "Database still corrupted after VACUUM" "${RED}"
        fi
    else
        print_status "${CROSS}" "VACUUM operation failed" "${RED}"
    fi
    
    # If VACUUM failed, suggest restore options
    print_status "${INFO}" "VACUUM repair failed. Consider these options:" "${YELLOW}"
    echo -e "${DIM}${YELLOW}   1. Restore from a backup using restore-plex.sh${RESET}"
    echo -e "${DIM}${YELLOW}   2. Delete corrupted database (Plex will rebuild, but you'll lose metadata)${RESET}"
    echo -e "${DIM}${YELLOW}   3. Check for corrupted database backups in: $db_dir/corrupted-*/${RESET}"
    
    return 1
}

# 🔍 Function to check database integrity
check_database_integrity() {
    print_status "${INFO}" "Checking database integrity..." "${BLUE}"
    
    local db_dir="/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases"
    local main_db="$db_dir/com.plexapp.plugins.library.db"
    local repair_script="${SCRIPT_DIR}/plex-database-repair.sh"
    
    if [[ ! -f "$main_db" ]]; then
        print_status "${CROSS}" "Main database not found at: $main_db" "${RED}"
        return 1
    fi
    
    # Use shared repair script for integrity checking if available
    if [[ -f "$repair_script" ]]; then
        if "$repair_script" check "$main_db" >/dev/null 2>&1; then
            print_status "${CHECKMARK}" "Database integrity check passed" "${GREEN}"
            return 0
        else
            print_status "${CROSS}" "Database integrity check failed!" "${RED}"
            print_status "${INFO}" "Consider running database repair: plex repair" "${YELLOW}"
            return 1
        fi
    else
        # Fallback to basic sqlite3 check
        if ! sudo -u plex sqlite3 "$main_db" "PRAGMA integrity_check;" >/dev/null 2>&1; then
            print_status "${CROSS}" "Database integrity check failed!" "${RED}"
            print_status "${INFO}" "Consider running database repair or restore from backup" "${YELLOW}"
            return 1
        fi
        
        print_status "${CHECKMARK}" "Database integrity check passed" "${GREEN}"
        return 0
    fi
}

# �🚀 Enhanced start function
start_plex() {
    print_status "${ROCKET}" "Starting Plex Media Server..." "${GREEN}"

    if systemctl is-active --quiet "$PLEX_SERVICE"; then
        print_status "${INFO}" "Plex is already running!" "${YELLOW}"
        show_detailed_status
        return 0
    fi

    # Reset any failed state first
    sudo systemctl reset-failed "$PLEX_SERVICE" 2>/dev/null || true
    
    # Check database integrity before starting
    if ! check_database_integrity; then
        print_status "${CROSS}" "Database integrity issues detected. Service may fail to start." "${RED}"
        echo -e "${DIM}${YELLOW}   Try: sudo systemctl stop plexmediaserver && sudo -u plex sqlite3 /var/lib/plexmediaserver/Library/Application\ Support/Plex\ Media\ Server/Plug-in\ Support/Databases/com.plexapp.plugins.library.db 'VACUUM;'${RESET}"
        return 1
    fi

    print_status "${INFO}" "Attempting to start service..." "${BLUE}"
    
    if ! sudo systemctl start "$PLEX_SERVICE"; then
        print_status "${CROSS}" "Failed to start Plex Media Server!" "${RED}"
        print_status "${INFO}" "Checking service logs..." "${BLUE}"
        
        # Show recent error logs
        echo -e "\n${DIM}${RED}Recent error logs:${RESET}"
        sudo journalctl -u "$PLEX_SERVICE" --no-pager -n 5 --since "1 minute ago" | tail -5
        
        return 1
    fi

    # Wait and verify startup
    sleep 3
    local timeout=30
    local elapsed=0
    
    print_status "${HOURGLASS}" "Waiting for service to initialize..." "${CYAN}"
    
    while [[ $elapsed -lt $timeout ]]; do
        if systemctl is-active --quiet "$PLEX_SERVICE"; then
            print_status "${CHECKMARK}" "Plex Media Server started successfully!" "${GREEN}"
            print_footer
            return 0
        fi
        
        sleep 2
        elapsed=$((elapsed + 2))
        echo -ne "${DIM}${CYAN}   Waiting... ${elapsed}s/${timeout}s${RESET}\r"
    done
    
    echo ""
    print_status "${CROSS}" "Service startup timeout or failed!" "${RED}"
    
    # Show current status
    local status
    status=$(systemctl is-active "$PLEX_SERVICE" 2>/dev/null || echo "unknown")
    print_status "${INFO}" "Current status: $status" "${YELLOW}"
    
    if [[ "$status" == "failed" ]]; then
        echo -e "\n${DIM}${RED}Recent error logs:${RESET}"
        sudo journalctl -u "$PLEX_SERVICE" --no-pager -n 10 --since "2 minutes ago"
    fi
    
    return 1
}

# 🛑 Enhanced stop function
stop_plex() {
    print_status "${STOP_SIGN}" "Stopping Plex Media Server..." "${YELLOW}"

    if ! systemctl is-active --quiet "$PLEX_SERVICE"; then
        print_status "${INFO}" "Plex is already stopped!" "${YELLOW}"
        return 0
    fi

    sudo systemctl stop "$PLEX_SERVICE" &
    local pid=$!
    show_loading "Gracefully shutting down Plex" $pid
    wait $pid

    if ! systemctl is-active --quiet "$PLEX_SERVICE"; then
        print_status "${CHECKMARK}" "Plex Media Server stopped successfully!" "${GREEN}"
        print_footer
    else
        print_status "${CROSS}" "Failed to stop Plex Media Server!" "${RED}"
        return 1
    fi
}

# ♻️ Enhanced restart function
restart_plex() {
    print_status "${RECYCLE}" "Restarting Plex Media Server..." "${BLUE}"

    if systemctl is-active --quiet "$PLEX_SERVICE"; then
        stop_plex
        echo ""
    fi

    start_plex
}

# 📊 Enhanced status function with detailed info
show_detailed_status() {
    local service_status
    service_status=$(systemctl is-active "$PLEX_SERVICE" 2>/dev/null || echo "inactive")

    echo -e "\n${BOLD}${BLUE}+==============================================================+${RESET}"
    echo -e "${BOLD}${BLUE}|                        SERVICE STATUS                        |${RESET}"
    echo -e "${BOLD}${BLUE}+==============================================================+${RESET}"

    case "$service_status" in
        "active")
            print_status "${CHECKMARK}" "Service Status: ${GREEN}${BOLD}ACTIVE${RESET}" "${GREEN}"

            # Get additional info
            local uptime
            uptime=$(systemctl show "$PLEX_SERVICE" --property=ActiveEnterTimestamp --value | xargs -I {} date -d {} "+%Y-%m-%d %H:%M:%S" 2>/dev/null || echo "Unknown")

            local memory_usage
            memory_usage=$(systemctl show "$PLEX_SERVICE" --property=MemoryCurrent --value 2>/dev/null || echo "0")
            if [[ "$memory_usage" != "0" ]] && [[ "$memory_usage" =~ ^[0-9]+$ ]]; then
                memory_usage="$(( memory_usage / 1024 / 1024 )) MB"
            else
                memory_usage="Unknown"
            fi

            echo -e "${DIM}${CYAN}   Started: ${WHITE}${uptime}${RESET}"
            echo -e "${DIM}${CYAN}   Memory Usage: ${WHITE}${memory_usage}${RESET}"
            echo -e "${DIM}${CYAN}   Service Name: ${WHITE}${PLEX_SERVICE}${RESET}"
            ;;
        "inactive")
            print_status "${CROSS}" "Service Status: ${RED}${BOLD}INACTIVE${RESET}" "${RED}"
            echo -e "${DIM}${YELLOW}   Use '${SCRIPT_NAME} start' to start the service${RESET}"
            ;;
        "failed")
            print_status "${CROSS}" "Service Status: ${RED}${BOLD}FAILED${RESET}" "${RED}"
            echo -e "${DIM}${RED}   Check logs with: ${WHITE}journalctl -u ${PLEX_SERVICE}${RESET}"
            ;;
        *)
            print_status "${INFO}" "Service Status: ${YELLOW}${BOLD}${service_status^^}${RESET}" "${YELLOW}"
            ;;
    esac

    # Show recent logs
    echo -e "\n${DIM}${CYAN}+--- Recent Service Logs (24h) ---+${RESET}"
    
    # Try to get logs with sudo, fall back to user permissions
    local logs
    if logs=$(sudo journalctl -u "$PLEX_SERVICE" --no-pager -n 5 --since "24 hours ago" --output=short 2>/dev/null); then
        if [[ -n "$logs" && "$logs" != "-- No entries --" ]]; then
            echo -e "${DIM}${logs}${RESET}"
        else
            echo -e "${DIM}${YELLOW}No recent log entries found${RESET}"
        fi
    else
        # Fallback: try without sudo
        logs=$(journalctl -u "$PLEX_SERVICE" --no-pager -n 5 --since "24 hours ago" 2>/dev/null || echo "Unable to access logs")
        if [[ "$logs" == "Unable to access logs" || "$logs" == "-- No entries --" ]]; then
            echo -e "${DIM}${YELLOW}Unable to access recent logs (try: sudo journalctl -u ${PLEX_SERVICE})${RESET}"
        else
            echo -e "${DIM}${logs}${RESET}"
        fi
    fi
    
    echo -e "${DIM}${CYAN}+----------------------------------+${RESET}"
}

# 🔧 Show available commands
show_help() {
    echo -e "${BOLD}${WHITE}Usage:${RESET} ${CYAN}${SCRIPT_NAME}${RESET} ${YELLOW}<command>${RESET}"
    echo ""
    echo -e "${BOLD}${WHITE}Available Commands:${RESET}"
    echo -e "  ${GREEN}${BOLD}start${RESET}     ${ROCKET} Start Plex Media Server"
    echo -e "  ${YELLOW}${BOLD}stop${RESET}      ${STOP_SIGN} Stop Plex Media Server"
    echo -e "  ${BLUE}${BOLD}restart${RESET}   ${RECYCLE} Restart Plex Media Server"
    echo -e "  ${CYAN}${BOLD}status${RESET}    ${INFO} Show detailed service status"
    echo -e "  ${RED}${BOLD}repair${RESET}    [!] Repair database corruption issues"
    echo -e "  ${PURPLE}${BOLD}help${RESET}      [*] Show this help message"
    echo ""
    echo -e "${DIM}${WHITE}Examples:${RESET}"
    echo -e "  ${DIM}${SCRIPT_NAME} start     # Start the Plex service${RESET}"
    echo -e "  ${DIM}${SCRIPT_NAME} status    # Show current status${RESET}"
    echo -e "  ${DIM}${SCRIPT_NAME} repair    # Fix database issues${RESET}"
    echo ""
}

# Database repair function using shared script
repair_plex() {
    print_header "DATABASE REPAIR"
    print_status "${INFO}" "Attempting to repair Plex database..." "${YELLOW}"
    
    local db_dir="/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases"
    local main_db="$db_dir/com.plexapp.plugins.library.db"
    local repair_script="${SCRIPT_DIR}/plex-database-repair.sh"
    
    if [[ ! -f "$repair_script" ]]; then
        print_status "${CROSS}" "Database repair script not found: $repair_script" "${RED}"
        return 2
    fi
    
    if [[ ! -f "$main_db" ]]; then
        print_status "${CROSS}" "Main database not found at: $main_db" "${RED}"
        return 1
    fi
    
    # Stop Plex service first
    print_status "${INFO}" "Stopping Plex service for repair..." "${BLUE}"
    if ! sudo systemctl stop "$PLEX_SERVICE"; then
        print_status "${CROSS}" "Failed to stop Plex service!" "${RED}"
        return 1
    fi
    
    # Run the repair
    print_status "${INFO}" "Running database repair (this may take a while)..." "${BLUE}"
    
    if "$repair_script" repair "$main_db"; then
        print_status "${CHECKMARK}" "Database repair completed successfully!" "${GREEN}"
        
        # Try to start the service
        print_status "${INFO}" "Starting Plex service..." "${BLUE}"
        if sudo systemctl start "$PLEX_SERVICE"; then
            print_status "${CHECKMARK}" "Plex service started successfully!" "${GREEN}"
            print_footer
            return 0
        else
            print_status "${CROSS}" "Failed to start Plex service after repair!" "${RED}"
            return 1
        fi
    else
        local repair_exit_code=$?
        print_status "${CROSS}" "Database repair failed!" "${RED}"
        
        # Try to start the service anyway
        print_status "${INFO}" "Attempting to start Plex service anyway..." "${BLUE}"
        sudo systemctl start "$PLEX_SERVICE" 2>/dev/null || true
        
        if [[ $repair_exit_code -eq 2 ]]; then
            print_status "${INFO}" "Critical error - manual intervention required" "${YELLOW}"
        else
            print_status "${INFO}" "Repair failed but service may still work with corrupted database" "${YELLOW}"
        fi
        
        print_footer
        return $repair_exit_code
    fi
}

# 🎯 Main script logic
main() {
    # Check if running as root
    if [[ $EUID -eq 0 ]]; then
        print_header
        print_status "${CROSS}" "Don't run this script as root! Use your regular user account." "${RED}"
        exit 1
    fi

    # Check if no arguments provided
    if [[ $# -eq 0 ]]; then
        print_header
        show_help
        exit 1
    fi

    # Show header for all operations except help
    if [[ "${1,,}" != "help" ]] && [[ "${1,,}" != "--help" ]] && [[ "${1,,}" != "-h" ]]; then
        print_header
    fi

    case "${1,,}" in  # Convert to lowercase
        "start")
            start_plex
            ;;
        "stop")
            stop_plex
            ;;
        "restart"|"reload")
            restart_plex
            ;;
        "status"|"info")
            show_detailed_status
            ;;
        "repair"|"fix")
            repair_plex
            ;;
        "help"|"--help"|"-h")
            print_header
            show_help
            ;;
        *)
            print_status "${CROSS}" "Unknown command: ${RED}${BOLD}$1${RESET}" "${RED}"
            echo ""
            show_help
            exit 1
            ;;
    esac
}

# 🚀 Execute main function with all arguments
main "$@"