# frozen_string_literal: true

# Helper methods for per-User preferences
module PreferencesHelper
  def layout_choices
    [
      [s_('Layout|Fixed'), :fixed],
      [s_('Layout|Fluid'), :fluid]
    ]
  end

  # Returns an Array usable by a select field for more user-friendly option text
  def dashboard_choices
    dashboards = User.dashboards.keys

    validate_dashboard_choices!(dashboards)
    dashboards -= excluded_dashboard_choices

    dashboards.map do |key|
      # Use `fetch` so `KeyError` gets raised when a key is missing
      [localized_dashboard_choices.fetch(key), key]
    end
  end

  # Maps `dashboard` values to more user-friendly option text
  def localized_dashboard_choices
    {
      projects: _("Your Projects (default)"),
      stars:    _("Starred Projects"),
      project_activity: _("Your Projects' Activity"),
      starred_project_activity: _("Starred Projects' Activity"),
      followed_user_activity: _("Followed Users' Activity"),
      groups: _("Your Groups"),
      todos: _("Your To-Do List"),
      issues: _("Assigned Issues"),
      merge_requests: _("Assigned merge requests"),
      operations: _("Operations Dashboard")
    }.with_indifferent_access.freeze
  end

  def project_view_choices
    [
      [s_('ProjectView|Files and Readme (default)'), :files],
      [s_('ProjectView|Activity'), :activity],
      [s_('ProjectView|Readme'), :readme]
    ]
  end

  def first_day_of_week_choices
    [
      [_('Sunday'), 0],
      [_('Monday'), 1],
      [_('Saturday'), 6]
    ]
  end

  def first_day_of_week_choices_with_default
    first_day_of_week_choices.unshift([_('System default (%{default})') % { default: default_first_day_of_week }, nil])
  end

  def user_application_theme
    @user_application_theme ||= Gitlab::Themes.for_user(current_user).css_class
  end

  def user_application_dark_mode?
    user_application_theme == 'gl-dark'
  end

  def user_application_theme_css_filename
    @user_application_theme_css_filename ||= Gitlab::Themes.for_user(current_user).css_filename
  end

  def user_theme_primary_color
    Gitlab::Themes.for_user(current_user).primary_color
  end

  def user_color_scheme
    Gitlab::ColorSchemes.for_user(current_user).css_class
  end

  def user_tab_width
    Gitlab::TabWidth.css_class_for_user(current_user)
  end

  def user_diffs_colors
    {
      deletion: current_user&.diffs_deletion_color.presence,
      addition: current_user&.diffs_addition_color.presence
    }.compact
  end

  def custom_diff_color_classes
    return if request.path == profile_preferences_path

    classes = []
    classes << 'diff-custom-addition-color' if current_user&.diffs_addition_color.presence
    classes << 'diff-custom-deletion-color' if current_user&.diffs_deletion_color.presence
    classes
  end

  def language_choices
    options_for_select(
      selectable_locales_with_translation_level.sort,
      current_user.preferred_language
    )
  end

  def integration_views
    [].tap do |views|
      views << { name: 'gitpod', message: gitpod_enable_description, message_url: gitpod_url_placeholder, help_link: help_page_path('integration/gitpod.md') } if Gitlab::CurrentSettings.gitpod_enabled
      views << { name: 'sourcegraph', message: sourcegraph_url_message, message_url: Gitlab::CurrentSettings.sourcegraph_url, help_link: help_page_path('user/profile/preferences.md', anchor: 'sourcegraph') } if Gitlab::Sourcegraph.feature_available? && Gitlab::CurrentSettings.sourcegraph_enabled
    end
  end

  private

  def gitpod_url_placeholder
    Gitlab::CurrentSettings.gitpod_url.presence || 'https://gitpod.io/'
  end

  # Ensure that anyone adding new options updates `DASHBOARD_CHOICES` too
  def validate_dashboard_choices!(user_dashboards)
    if user_dashboards.size != localized_dashboard_choices.size
      raise "`User` defines #{user_dashboards.size} dashboard choices," \
        " but `localized_dashboard_choices` defined #{localized_dashboard_choices.size}."
    end
  end

  # List of dashboard choice to be excluded from CE.
  # EE would override this.
  def excluded_dashboard_choices
    ['operations']
  end

  def default_first_day_of_week
    first_day_of_week_choices.rassoc(Gitlab::CurrentSettings.first_day_of_week).first
  end

  def selectable_locales_with_translation_level
    Gitlab::I18n.selectable_locales.map do |code, language|
      [
        s_("i18n|%{language} (%{percent_translated}%% translated)") % {
          language: language,
          percent_translated: Gitlab::I18n.percentage_translated_for(code)
        },
        code
      ]
    end
  end
end

PreferencesHelper.prepend_mod_with('PreferencesHelper')
