module ApplicationHelper
  APP_HOST = ENV['APP_HOST']
  APP_HOST_LEGACY = ENV['APP_HOST_LEGACY']
  REGEXP_REPLACE_TRAILING_EXTENSION = /(\.\w+)+$/.freeze
  REGEXP_REPLACE_WORD_SEPARATOR = /[\s_-]+/.freeze

  def app_host_legacy?(request)
    return false if APP_HOST_LEGACY.blank?

    Regexp.new(APP_HOST_LEGACY).match?(request.base_url)
  end

  def auto_switch_domain?(request, user_signed_in)
    switch_domain_enabled?(request) && !user_signed_in && app_host_legacy?(request)
  end

  def switch_domain_enabled?(request)
    request.params.key?(:switch_domain) || Flipper.enabled?(:switch_domain, Current.user)
  end

  def html_lang
    I18n.locale.to_s
  end

  def active_locale_link(locale)
    link_to save_locale_path(locale:), {
      method: :post,
      class: "fr-translate__language fr-nav__link",
      hreflang: locale,
      lang: locale,
      "aria-current": I18n.locale == locale ? "true" : nil
    }.compact do
      yield
    end
  end

  def flash_class(level, sticky: false, fixed: false)
    class_names = []

    case level
    when 'notice'
      class_names << 'alert-success'
    when 'alert', 'error'
      class_names << 'alert-danger'
    end

    if sticky
      class_names << 'sticky'
    end
    if fixed
      class_names << 'alert-fixed'
    end
    class_names.join(' ')
  end

  def flash_role(level)
    return "status" if level == "notice"

    'alert'
  end

  def react_component(name, props = {}, html = {})
    tag.div(**html.merge(data: { controller: 'react', react_component_value: name, react_props_value: props.to_json }))
  end

  def current_email
    current_user&.email ||
      current_instructeur&.email ||
      current_administrateur&.email ||
      current_gestionnaire&.email
  end

  def staging?
    Rails.application.config.ds_env == 'staging'
  end

  def contact_link(title, options = {})
    tags, type, dossier_id = options.values_at(:tags, :type, :dossier_id)
    options.except!(:tags, :type, :dossier_id)

    params = { tags: tags, type: type, dossier_id: dossier_id }.compact
    link_to title, contact_url(params), options
  end

  def root_path_for_profile(nav_bar_profile)
    case nav_bar_profile
    when :instructeur
      instructeur_procedures_path
    when :user
      dossiers_path
    else
      root_path
    end
  end

  def root_path_info_for_profile(nav_bar_profile)
    case nav_bar_profile
    when :administrateur
      [admin_procedures_path, t("admin", scope: "layouts.root_path_link_title")]
    when :gestionnaire
      [gestionnaire_groupe_gestionnaires_path, t("gestionnaire", scope: "layouts.root_path_link_title")]
    when :instructeur
      [instructeur_procedures_path, t("instructeur", scope: "layouts.root_path_link_title")]
    when :user
      [dossiers_path, t("user", scope: "layouts.root_path_link_title")]
    else
      [root_path, t("default", scope: "layouts.root_path_link_title")]
    end
  end

  def try_format_date(date)
    date.present? ? I18n.l(date, format: :long) : ''
  end

  def try_format_datetime(datetime, format: nil)
    datetime.present? ? I18n.l(datetime, format:) : ''
  end

  def try_format_mois_effectif(etablissement)
    if etablissement.entreprise_effectif_mois.present? && etablissement.entreprise_effectif_annee.present?
      [etablissement.entreprise_effectif_mois, etablissement.entreprise_effectif_annee].join('/')
    else
      ''
    end
  end

  def show_outdated_browser_banner?
    !BrowserSupport.supported?(browser)
  end

  def external_link_attributes
    { target: "_blank", rel: "noopener noreferrer" }
  end

  def new_tab_suffix(title)
    [title, I18n.t('utils.new_tab')].compact.join(' — ')
  end

  def download_details(attachment)
    "#{attachment.filename.extension.upcase} – #{number_to_human_size(attachment.byte_size)}"
  end

  def dsfr_icon(classes, *options)
    sm = options.include?(:sm)
    mr = options.include?(:mr)

    tag.span(class: class_names(classes, 'fr-icon--sm': sm, 'fr-mr-1v': mr),
             "aria-hidden" => true)
  end

  def acronymize(str)
    str.gsub(REGEXP_REPLACE_TRAILING_EXTENSION, '')
      .split(REGEXP_REPLACE_WORD_SEPARATOR)
      .map { |word| word[0].upcase }
      .join
  end
end