module ApplicationHelper
  include Pagy::Frontend if defined?(Pagy)

  # Helper method for time period selector styling
  def time_period_class(period)
    base_classes = "px-4 py-2 text-sm font-medium border-r border-gray-300 last:border-r-0"

    if @time_period == period
      base_classes + " bg-blue-600 text-white"
    else
      base_classes + " text-gray-700 hover:bg-gray-50"
    end
  end

  # Custom pagination with Tailwind CSS styling
  def pagy_nav_tailwind(pagy, pagy_id: nil)
    return '' if pagy.pages <= 1

    html = '<nav class="flex items-center justify-between" aria-label="Pagination">'
    html += '<div class="flex-1 flex justify-between sm:hidden">'

    if pagy.prev
      html += link_to('← Previous', pagy_url_for(pagy, pagy.prev),
                      class: 'relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50')
    else
      html += '<span class="relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-300 bg-gray-100 cursor-not-allowed">← Previous</span>'
    end

    if pagy.next
      html += link_to('Next →', pagy_url_for(pagy, pagy.next),
                      class: 'ml-3 relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50')
    else
      html += '<span class="ml-3 relative inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-300 bg-gray-100 cursor-not-allowed">Next →</span>'
    end

    html += '</div>'
    html += '<div class="hidden sm:flex-1 sm:flex sm:items-center sm:justify-between">'
    html += '<div>'
    html += '<p class="text-sm text-gray-700">'
    html += 'Showing'
    html += " <span class=\"font-medium\">#{pagy.from}</span>"
    html += ' to'
    html += " <span class=\"font-medium\">#{pagy.to}</span>"
    html += ' of'
    html += " <span class=\"font-medium\">#{pagy.count}</span>"
    html += ' results'
    html += '</p>'
    html += '</div>'
    html += '<div>'
    html += '<nav class="relative z-0 inline-flex rounded-md shadow-sm -space-x-px" aria-label="Pagination">'

    # Previous button
    if pagy.prev
      html += link_to('←', pagy_url_for(pagy, pagy.prev),
                      class: 'relative inline-flex items-center px-2 py-2 rounded-l-md border border-gray-300 bg-white text-sm font-medium text-gray-500 hover:bg-gray-50')
    else
      html += '<span class="relative inline-flex items-center px-2 py-2 rounded-l-md border border-gray-300 bg-gray-50 text-sm font-medium text-gray-300 cursor-not-allowed">←</span>'
    end

    # Page numbers
    pagy.series.each do |item|
      case item
      when Integer
        if item == pagy.page
          html += "<span aria-current=\"page\" class=\"relative inline-flex items-center px-4 py-2 border border-blue-500 bg-blue-500 text-sm font-medium text-white\">#{item}</span>"
        else
          html += link_to(item, pagy_url_for(pagy, item),
                          class: 'relative inline-flex items-center px-4 py-2 border border-gray-300 bg-white text-sm font-medium text-gray-700 hover:bg-gray-50')
        end
      when String
        html += "<span class=\"relative inline-flex items-center px-4 py-2 border border-gray-300 bg-white text-sm font-medium text-gray-700\">#{item}</span>"
      when :gap
        html += "<span class=\"relative inline-flex items-center px-4 py-2 border border-gray-300 bg-white text-sm font-medium text-gray-700\">...</span>"
      end
    end

    # Next button
    if pagy.next
      html += link_to('→', pagy_url_for(pagy, pagy.next),
                      class: 'relative inline-flex items-center px-2 py-2 rounded-r-md border border-gray-300 bg-white text-sm font-medium text-gray-500 hover:bg-gray-50')
    else
      html += '<span class="relative inline-flex items-center px-2 py-2 rounded-r-md border border-gray-300 bg-gray-50 text-sm font-medium text-gray-300 cursor-not-allowed">→</span>'
    end

    html += '</nav>'
    html += '</div>'
    html += '</div>'
    html += '</nav>'

    raw html
  end

  # Helper methods for job queue status colors
  def job_queue_status_color(status)
    case status.to_s
    when 'healthy'
      'bg-green-500'
    when 'warning'
      'bg-yellow-500'
    when 'critical'
      'bg-red-500'
    when 'error'
      'bg-gray-500'
    else
      'bg-blue-500'
    end
  end

  def job_queue_status_text_color(status)
    case status.to_s
    when 'healthy'
      'text-green-600'
    when 'warning'
      'text-yellow-600'
    when 'critical'
      'text-red-600'
    when 'error'
      'text-gray-600'
    else
      'text-blue-600'
    end
  end

  # Parse user agent string into readable components
  def parse_user_agent(user_agent)
    return nil if user_agent.blank?

    client = DeviceDetector.new(user_agent)

    {
      name: client.name,
      version: client.full_version,
      os_name: client.os_name,
      os_version: client.os_full_version,
      device_type: client.device_type || "desktop",
      device_name: client.device_name,
      bot: client.bot?,
      bot_name: client.bot_name,
      raw: user_agent
    }
  end

  # Convert country code to flag emoji
  def country_flag(country_code)
    return "" if country_code.blank?

    # Convert ISO 3166-1 alpha-2 country code to flag emoji
    # Each letter is converted to its regional indicator symbol
    country_code.upcase.chars.map { |c| (c.ord + 127397).chr(Encoding::UTF_8) }.join
  rescue
    ""
  end
end