class Leads::AttributionMatcherService
  def initialize(conversation, inbound_ip = nil)
    @conversation = conversation
    @contact = conversation.contact
    @inbox_id = conversation.inbox_id
    @inbound_ip = inbound_ip
  end

  def perform
    return unless valid_for_matching?

    click = find_matching_click
    return unless click

    apply_attribution(click)
  end

  private

  def valid_for_matching?
    @conversation.present? && @contact.present? &&
      @conversation.custom_attributes['link_de_origem'].blank?
  end

  def find_matching_click
    base_query = LeadClick
                 .where(status: :clicked, inbox_id: @inbox_id)
                 .where('created_at > ?', 5.minutes.ago)

    return base_query.where(ip: @inbound_ip).order(created_at: :desc).first if @inbound_ip.present?

    base_query.order(created_at: :desc).first
  end

  def attribution_attrs(click)
    {
      'link_de_origem' => click.source,
      'campanha' => click.campanha,
      'lp_hostname' => click.hostname,
      'click_id' => click.click_id || click.id.to_s
    }
  end

  def apply_attribution(click)
    ActiveRecord::Base.transaction do
      click.update!(status: :converted, conversation_id: @conversation.id, contact_id: @contact.id)
      update_contact(click)
      update_conversation(click)
      apply_labels(click)
    end
  end

  def update_contact(click)
    @contact.update!(custom_attributes: @contact.custom_attributes.to_h.merge(attribution_attrs(click)))
  end

  def update_conversation(click)
    @conversation.update!(
      custom_attributes: @conversation.custom_attributes.to_h.merge(attribution_attrs(click))
    )
  end

  def apply_labels(click)
    labels = []
    labels << 'lead_meta' if click.source.to_s.downcase.include?('meta')

    host_label = auto_label_for(click)
    labels << host_label if host_label.present?

    @conversation.add_labels(labels.uniq) if labels.any?
  end

  def auto_label_for(click)
    hostname = click.hostname.to_s.strip.sub(%r{^https?://}, '').sub(%r{/.*$}, '')
    LandingHost.find_by(inbox_id: @inbox_id, hostname: hostname, active: true)&.auto_label.to_s.strip.presence
  end
end