#!/opt/brepo/ruby33/bin/ruby
# info: utility to prepare existing server with hestiacp to use bunkerweb
# do not run this script n the server, where bunkerweb was installed with hestiacp
# installation
# options: COMMAND
#
# example: v-bunkerweb-migrate migrate-nginx
#
# Commands:
# migratenginx - move old nginx configs to the new port and path
# migratetobunkerweb - create items of sites in the bunkerweb database
#

#------------------------------------------#
#                Variables & Functions                     #
#------------------------------------------#

# Argument definition
v_command = ARGV[0]

require "/usr/local/hestia/func_ruby/global_options"

load_ruby_options_defaults
$HESTIA = load_hestia_default_path_from_env

require "main"
require "modules"
require "HestiaBunkerWebApi"

require 'json' unless defined?(JSON)
require 'fileutils'
require 'time'
require 'pathname'


def copy_nginx_files(src_root, dest_root)
  FileUtils.mkdir_p(dest_root)
  Dir.foreach(src_root) do |entry|
    next if entry == '.' || entry == '..'
    next if entry == 'modules' || entry == 'modules-enabled'
    src_path = File.join(src_root, entry)
    dest_path = File.join(dest_root, entry)
    if File.directory?(src_path)
      FileUtils.mkdir_p(dest_path)
      copy_nginx_files(src_path, dest_path)
    else
      FileUtils.cp(src_path, dest_path)
    end
  end
end

# Function to log and execute migration stages
def log_migrate_stage(stage)
  log_file = '/usr/local/hestia/log/bunkerweb_migrate_stages.log'
  # Check if the stage has already been recorded
  if File.exist?(log_file) && File.readlines(log_file).any? { |line| line.strip == stage }
    hestia_print_error_message_to_cli "Stage #{stage} already completed, skipping."
    return
  end
  # Execute the stage block
  begin
    yield
    # Record the successful stage
    File.open(log_file, 'a') { |f| f.puts stage }
    hestia_print_info_message_to_cli "Stage #{stage} completed."
  rescue => e
    hestia_print_error_message_to_cli "Stage #{stage} failed: #{e.message}"
    exit 1
  end
end

# Function to parse and migrate nginx.conf from /usr/local/hestia/nginx-system/etc/nginx/nginx.conf
def migrate_nginx_config_from_file(source_path)
  return false unless File.exist?(source_path)

  hestia_print_info_message_to_cli "Processing nginx config from: #{source_path}"

  content = File.read(source_path)
  original_content = content.dup

  modified = false

  # Replace all paths starting with /var/ to /usr/local/hestia/nginx-system/var/
  # This pattern matches any absolute path that starts with /var/ anywhere in the line
  content = content.gsub(/\/var\//, '/usr/local/hestia/nginx-system/var/')

  # Replace pid path from /run/nginx.pid to /run/nginx-system.pid
  content = content.gsub(/pid\s+\S+/) { |match| match.gsub('/run/nginx.pid', '/run/nginx-system.pid') }

  if content != original_content
    File.write(source_path, content)
    hestia_print_info_message_to_cli "Updated config: #{source_path}"
    modified = true
  end

  modified
end

def parse_listen(line)
  # Попытка найти IP:port
  m = line.match(/^\s*listen\s+([^\s:]+):(\d+)/i)
  return [m[1], m[2]] if m
  # Если только порт после listen
  m = line.match(/^\s*listen\s+(\d+);?\s*$/i)
  return [nil, m[1]] if m
  nil
end

# Helper function to parse and replace ports in listen directives using temp placeholders
def parse_and_replace_listen_directive(line, proxy_port, proxy_ssl_port)
  return line unless line.match?(/\blisten\b/i)

  new_line = line.dup

  # Define target ports (always migrate to these values regardless of input)
  target_http_port = '8078'
  target_ssl_port = '8079'

  result = parse_listen(line)
  return line unless result
  ip, port = result

  if port == proxy_port
    if ip
      new_line.gsub!("#{ip}:#{port}", "#{ip}:#{target_http_port}")
    else
      new_line.gsub!(port, target_http_port)
    end
  elsif port == proxy_ssl_port
    if ip
      new_line.gsub!("#{ip}:#{port}", "#{ip}:#{target_ssl_port}")
    else
      new_line.gsub!(port, target_ssl_port)
    end
  end

  new_line
end

hestia_check_privileged_user

load_global_bash_variables "/etc/hestiacp/hestia.conf"
if $HESTIA.nil?
  hestia_print_error_message_to_cli "Can't find HESTIA base path"
  exit 1
end

load_global_bash_variables "#{$HESTIA}/conf/hestia.conf"

#------------------------------------------#
#                    Verifications                         #
#------------------------------------------#

check_args 1, ARGV, "COMMAND"

# Perform verification if read-only mode is enabled
check_hestia_demo_mode

#------------------------------------------#
#                       Action                             #
#------------------------------------------#

case v_command.to_sym
when :migratenginx
  log_migrate_stage('stage0') do
    # Create backup of /etc/nginx with timestamp

    timestamp = Time.now.strftime('%Y%m%d_%H%M%S')
    backup_root = "/etc/nginx_backup_#{timestamp}"
    FileUtils.mkdir_p(backup_root)

    src_root = '/etc/nginx'
    dest_root = backup_root

    # Custom copy function to handle symlinks in conf.d/domains
    def copy_with_symlinks(src, dest)
      Dir.foreach(src) do |entry|
        next if entry == '.' || entry == '..'
        src_path = File.join(src, entry)
        dest_path = File.join(dest, entry)

        if File.symlink?(src_path)
          # Check if symlink is inside conf.d/domains
          if src_path.include?(File.join('conf.d', 'domains'))
            # Resolve the target of the symlink
            target_path = File.readlink(src_path)
            # Resolve relative symlink paths
            unless Pathname.new(target_path).absolute?
              target_path = File.expand_path(target_path, File.dirname(src_path))
            end
            if File.exist?(target_path) && File.file?(target_path)
              content = File.read(target_path)
              new_file_name = "#{entry}_content.conf"
              new_file_path = File.join(dest, new_file_name)
              File.write(new_file_path, content)
            end
          else
            # Preserve the symlink as is
            FileUtils.mkdir_p(File.dirname(dest_path))
            target = File.readlink(src_path)
            FileUtils.ln_s(target, dest_path)
          end
        elsif File.directory?(src_path)
          FileUtils.mkdir_p(dest_path)
          copy_with_symlinks(src_path, dest_path)
        else
          FileUtils.cp(src_path, dest_path)
        end
      end
    end

    copy_with_symlinks(src_root, dest_root)
  end
  log_migrate_stage('stage1') do
    if $BUNKERWEB.nil?
      hestia_change_sys_config_value("BUNKERWEB", "yes")
    end
  end
  log_migrate_stage('stage2') do
    unless system('yum install -y nginx-system')
      hestia_print_error_message_to_cli "Failed to install nginx-system via yum"
      log_event E_ARGS, $ARGUMENTS
      exit 1
    end
  end
  log_migrate_stage('stage3') do
    FileUtils.rm_f Dir.glob('/usr/local/hestia/nginx-system/etc/nginx/conf.d/*.conf')
    src_root = '/etc/nginx'
    dest_root = '/usr/local/hestia/nginx-system/etc/nginx'
    copy_nginx_files(src_root, dest_root)
  end
  log_migrate_stage('stage4') do
    # Find all files under the nginx-system directory
    nginx_conf_dir = '/usr/local/hestia/nginx-system/etc/nginx'
    Dir.glob(File.join(nginx_conf_dir, '**', '*')).each do |path|
      hestia_print_info_message_to_cli "stage 4 processing file #{path}"
      next if File.directory?(path)
      content = File.read(path)
      new_content = content.gsub(/(?<!\/usr\/local\/hestia\/nginx-system)\/etc\/nginx/, '/usr/local/hestia/nginx-system/etc/nginx')
      if new_content != content
        hestia_print_info_message_to_cli "Changed path to config in file #{path}"
        File.open(path, 'w') { |f| f.write(new_content) }
      end
    end
  end
  log_migrate_stage('stage4.1') do
    # Parse nginx.conf file to replace paths
    if migrate_nginx_config_from_file("/usr/local/hestia/nginx-system/etc/nginx/nginx.conf")
      hestia_print_info_message_to_cli "Completed migration of nginx.conf paths"
    else
      hestia_print_error_message_to_cli "Warning: Could not migrate nginx.conf from #{File.expand_path('/usr/local/hestia/nginx-system/etc/nginx/nginx.conf')}"
    end
  end
  log_migrate_stage('stage5') do
    nginx_conf_dir = '/usr/local/hestia/nginx-system/etc/nginx'

    # Read proxy ports from configuration
    #proxy_port = $PROXY_PORT.nil? || $PROXY_PORT.empty? ? '80' : $PROXY_PORT
    #proxy_ssl_port = $PROXY_SSL_PORT.nil? || $PROXY_SSL_PORT.empty? ? '443' : $PROXY_SSL_PORT

    proxy_port = '80'
    proxy_ssl_port = '443'

    hestia_print_info_message_to_cli "Migrating ports: #{proxy_port} -> 8078, #{proxy_ssl_port} -> 8079"

    # Find and replace port in all .conf files
    Dir.glob(File.join(nginx_conf_dir, '**', '*.conf')).each do |conf_file|
      hestia_print_info_message_to_cli "stage 5 processing file #{conf_file}"
      content = File.read(conf_file)
      modified = false

      # Process line by line - only replace ports in listen directives
      new_lines = []

      content.each_line do |line|
        # Check if line is a listen directive (starts with optional whitespace then 'listen')
        if /^\s*listen\s+/i.match?(line) || /^listen\s+/i.match?(line)
          # This is a listen line - process it
          new_line = parse_and_replace_listen_directive(line, proxy_port, proxy_ssl_port)
          modified = true unless new_line == line
          new_lines << new_line
        else
          # Not a listen line, keep as is
          new_lines << line
        end
      end

      # Write changes back if modified
      if modified
        File.open(conf_file, 'w') { |f| f.write(new_lines.join) }
        hestia_print_info_message_to_cli "  Updated: #{conf_file}"
      end
    end
  end

  log_migrate_stage('stage6') do
    hestia_change_sys_config_value("PROXY_PORT", "8078")
    hestia_change_sys_config_value("PROXY_SSL_PORT", "8079")
  end
  log_migrate_stage('stage7') do
    if system('/usr/local/hestia/bin/v-ext-modules enable update_module')
      output = IO.popen("/usr/local/hestia/bin/v-ext-modules state update_module json").read
      begin
        parsed = JSON.parse(output)
        if parsed.is_a?(Array) && parsed.first && parsed.first['STATE'] == 'enabled'
          system('/usr/local/hestia/bin/v-ext-modules-run update_module synctemplates')
        else
          hestia_print_error_message_to_cli "update_module not enabled after enable command"
          exit 1
        end
      rescue JSON::ParserError => e
        hestia_print_error_message_to_cli "Failed to parse JSON from state command: #{e.message}"
        exit 1
      end
    else
      hestia_print_error_message_to_cli "Failed to enable update_module"
      exit 1
    end
  end
  log_migrate_stage('stage8') do
    hestia_change_sys_config_value("PROXY_PORT", "8078")
    hestia_change_sys_config_value("PROXY_SSL_PORT", "8079")
  end
  #stage8 активация из запуск nginx-system
  log_migrate_stage('stage9') do
    # Delete all contents inside /etc/nginx
    FileUtils.rm_rf Dir.glob('/etc/nginx/*')
    # Stop nginx service
    system('systemctl stop nginx')
    # Start nginx-system service
    system('systemctl enable nginx-system')
    system('systemctl start nginx-system')
  end
when :migratetobunkerweb
  log_migrate_stage('stage10') do
    if system('/usr/local/hestia/bin/v-ext-modules enable bunkerweb_module')
      output = IO.popen("/usr/local/hestia/bin/v-ext-modules state bunkerweb_module json").read
      begin
        parsed = JSON.parse(output)
        if parsed.is_a?(Array) && parsed.first && parsed.first['STATE'] == 'enabled'
          result = system('/usr/local/hestia/bin/v-ext-modules-run bunkerweb_module configure')
          unless result
            hestia_print_error_message_to_cli "bunkerweb_module configure command failed"
            exit 1
          end
        else
          hestia_print_error_message_to_cli "bunkerweb_module not enabled after enable command"
          exit 1
        end
      rescue JSON::ParserError => e
        hestia_print_error_message_to_cli "Failed to parse JSON from state command: #{e.message}"
        exit 1
      end
    else
      hestia_print_error_message_to_cli "Failed to enable bunkerweb_module"
      exit 1
    end
    hestia_print_info_message_to_cli "Ожидаем минуту для перезапуска сервиса bunkerweb..."
    sleep 60
  end
  LIST_DOMAINS=[]

  log_migrate_stage('stage11') do
    hestia_print_info_message_to_cli "Stage 11: Migrating users and domains to BunkerWeb..."

    # Get all users from HestiaCP in JSON format
    user_list_output = IO.popen("/usr/local/hestia/bin/v-list-users json").read
    begin
      user_data = JSON.parse(user_list_output)
    rescue JSON::ParserError => e
      hestia_print_error_message_to_cli "Failed to parse users JSON: #{e.message}"
      exit 1
    end

    # Iterate over each user
    user_data.each do |username, user_info|
      next unless user_info.is_a?(Hash)

      web_domains_count = user_info['U_WEB_DOMAINS']
      next unless web_domains_count && web_domains_count.to_i > 0

      hestia_print_info_message_to_cli "Processing user: #{username} (#{web_domains_count} domains)"

      # Get web domains for this user in JSON format
      domain_list_output = IO.popen("/usr/local/hestia/bin/v-list-web-domains #{username} json").read
      begin
        domain_data = JSON.parse(domain_list_output)
      rescue JSON::ParserError => e
        hestia_print_error_message_to_cli "Failed to parse domains JSON for user #{username}: #{e.message}"
        next
      end

      # Process each domain
      domain_data.each do |domain_name, domain_info|
        next unless domain_info.is_a?(Hash)

        ssl_status = domain_info['SSL'] || 'no'
        is_ssl = ssl_status == 'yes'

        # Get IP from domain info - should be available in the parsed JSON
        proxy_host = domain_info['IP'] || (domain_info['IP6'].present? ? domain_info['IP6'].strip : "127.0.0.1")
        proxy_host = proxy_host.nil? || proxy_host.empty? ? "127.0.0.1" : proxy_host

        # Create alias list from domain info (ALIAS field contains comma-separated aliases)
        raw_aliases = domain_info['ALIAS'] || ''
        if raw_aliases && !raw_aliases.empty?
          # Hestia uses comma-separated, pass as-is to v-bunkerweb-module (it handles conversion internally)
          aliases_list = raw_aliases
        else
          aliases_list = domain_name  # No aliases, use domain name only
        end

        hestia_print_info_message_to_cli "Processing domain: #{domain_name} (SSL: #{is_ssl}, IP: #{proxy_host})"

        begin
          # Add domain to BunkerWeb via module script (without SSL)
          cmd = "/usr/local/hestia/bin/v-bunkerweb-module add #{domain_name} #{proxy_host}"
          puts_cmd = "  Added #{domain_name}: Executing command: #{cmd}"
          hestia_print_info_message_to_cli puts_cmd

          result = system(cmd)

          if result
            # Команда успешно выполнена
            hestia_print_info_message_to_cli "  Status: Success"
          else
            hestia_print_error_message_to_cli "  Failed to add domain #{domain_name}"
            next
          end
        rescue => e
          hestia_print_error_message_to_cli "Failed to add domain #{domain_name} to BunkerWeb: #{e.message}"
          next
        end

        # Add aliases to the domain via module script
        begin
          cmd = "/usr/local/hestia/bin/v-bunkerweb-module alias #{domain_name} \"#{aliases_list}\""
          puts_cmd = "  Added aliases for #{domain_name}: Executing command: #{cmd}"
          hestia_print_info_message_to_cli puts_cmd

          result = system(cmd)

          if result
            hestia_print_info_message_to_cli "  Status: Success"
          else
            hestia_print_error_message_to_cli "  Failed to set aliases for #{domain_name}"
            next
          end
        rescue => e
          hestia_print_error_message_to_cli "Failed to set aliases for #{domain_name}: #{e.message}"
          next
        end

        # Handle SSL configuration if enabled
        if is_ssl
          original_ssl_dir = "/home/#{username}/conf/web/#{domain_name}/ssl"

          # Check if SSL directory and files exist
          unless Dir.exist?(original_ssl_dir) || File.exist?("#{original_ssl_dir}/#{domain_name}.pem")
            hestia_print_error_message_to_cli "Warning: SSL files not found for #{domain_name}"
            LIST_DOMAINS << {
              user: username,
              domain: domain_name,
              is_ssl: true,
              path_to_ssl: nil
            }
            next
          end

          # Define bunkerweb directory for this domain's certificates
          bunkerweb_ssl_dir = "/home/#{username}/conf/web/#{domain_name}/ssl/bunkerweb"

          begin
            # Create bunkerweb SSL directory if it doesn't exist
            FileUtils.mkdir_p(bunkerweb_ssl_dir)
            FileUtils.chmod(0755, bunkerweb_ssl_dir)

            # Define paths in bunkerweb directory
            crt_path_bunkerweb = "#{bunkerweb_ssl_dir}/#{domain_name}.crt"
            cert_path_bunkerweb = "#{bunkerweb_ssl_dir}/#{domain_name}.pem"
            key_path_bunkerweb = "#{bunkerweb_ssl_dir}/#{domain_name}.key"

            # Copy all SSL files if they exist (matching v-add-web-domain-ssl behavior)
            original_crt = "#{original_ssl_dir}/#{domain_name}.crt"
            original_pem = "#{original_ssl_dir}/#{domain_name}.pem"
            original_key = "#{original_ssl_dir}/#{domain_name}.key"
            original_ca = "#{original_ssl_dir}/#{domain_name}.ca"

            # Copy .crt file if exists
            if File.exist?(original_crt)
              FileUtils.cp(original_crt, crt_path_bunkerweb)
            end

            if File.exist?(original_pem)
              # Only use .pem if .crt doesn't exist (fallback like the backup script)
              FileUtils.cp(original_pem, cert_path_bunkerweb)
            end

            # Copy .key file if exists
            if File.exist?(original_key)
              FileUtils.cp(original_key, key_path_bunkerweb)
            end

            # Copy .ca file if exists
            if File.exist?(original_ca)
              FileUtils.cp(original_ca, "#{bunkerweb_ssl_dir}/#{domain_name}.ca")
            end

            # Set ownership and permissions (nginx user can read, others cannot)
            FileUtils.chown('root', 'nginx', bunkerweb_ssl_dir)
            FileUtils.chmod(0755, bunkerweb_ssl_dir)

            FileUtils.chown('root', 'nginx', cert_path_bunkerweb) if File.exist?(cert_path_bunkerweb)
            FileUtils.chmod(0640, cert_path_bunkerweb) if File.exist?(cert_path_bunkerweb)

            FileUtils.chown('root', 'nginx', key_path_bunkerweb) if File.exist?(key_path_bunkerweb)
            FileUtils.chmod(0640, key_path_bunkerweb) if File.exist?(key_path_bunkerweb)

            FileUtils.chown('root', 'nginx', crt_path_bunkerweb) if File.exist?(crt_path_bunkerweb)
            FileUtils.chmod(0640, crt_path_bunkerweb) if File.exist?(crt_path_bunkerweb)

            # Add SSL configuration to BunkerWeb via module script (use proxy_host from earlier)

            cmd = "/usr/local/hestia/bin/v-bunkerweb-module addssl #{domain_name} #{crt_path_bunkerweb} #{key_path_bunkerweb}"
            puts_cmd = "  Added SSL for #{domain_name}: Executing command: #{cmd}"
            hestia_print_info_message_to_cli puts_cmd

            result = system(cmd)

            if result
              hestia_print_info_message_to_cli "  Status: Success"
            else
              hestia_print_error_message_to_cli "  Failed to configure SSL for #{domain_name}"
            end

            # Update path_to_ssl to point to bunkerweb directory
            ssl_cert_path = crt_path_bunkerweb
          rescue => e
            hestia_print_error_message_to_cli "Failed to configure SSL for #{domain_name}: #{e.message}"
          end
        end

        # Populate LIST_DOMAINS array with domain info
        LIST_DOMAINS << {
          user: username,
          domain: domain_name,
          proxy_host: proxy_host.to_s,
          is_ssl: is_ssl == true ? "yes" : "no",  # Convert boolean/string to proper string format
          path_to_ssl: ssl_cert_path ? ssl_cert_path : nil
        }

        hestia_print_info_message_to_cli "Successfully migrated #{domain_name} for user #{username}"
      end
    end

    # Output the populated LIST_DOMAINS array
    if !LIST_DOMAINS.empty?
      hestia_print_info_message_to_cli "\n=== Populated LIST_DOMAINS ==="
      LIST_DOMAINS.each_with_index do |entry, idx|
        hestia_print_info_message_to_cli "#{idx + 1}. user: #{entry[:user]}, domain: #{entry[:domain]}, is_ssl: #{entry[:is_ssl].to_s}, path_to_ssl: #{entry[:path_to_ssl]}"
      end
    else
      hestia_print_error_message_to_cli "No domains were migrated to BunkerWeb"
    end

    hestia_print_info_message_to_cli "Stage 11 completed."
  end
else
  hestia_print_error_message_to_cli "unknown command (use migratetobunkerweb or migratenginx)"
  log_event E_ARGS, $ARGUMENTS
  exit 1
end

exit 0