#-- encoding: UTF-8

#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2020 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See docs/COPYRIGHT.rdoc for more details.
#++

module ProjectsHelper
  include WorkPackagesFilterHelper

  # Returns a set of options for a select field, grouped by project.
  def version_options_for_select(versions, selected = nil)
    grouped = Hash.new { |h, k| h[k] = [] }
    (versions + [selected]).compact.uniq.each do |version|
      grouped[version.project.name] << [version.name, version.id]
    end

    if grouped.size > 1
      grouped_options_for_select(grouped, selected && selected.id)
    else
      options_for_select((grouped.values.first || []), selected && selected.id)
    end
  end

  def filter_set?
    params[:filters].present?
  end

  def allowed_filters(query)
    query
      .available_filters
      .select { |f| whitelisted_project_filter?(f) }
      .sort_by(&:human_name)
  end

  def whitelisted_project_filter?(filter)
    whitelist = [
      Queries::Projects::Filters::ActiveFilter,
      Queries::Projects::Filters::ProjectStatusFilter,
      Queries::Projects::Filters::CreatedAtFilter,
      Queries::Projects::Filters::LatestActivityAtFilter,
      Queries::Projects::Filters::NameAndIdentifierFilter,
      Queries::Projects::Filters::TypeFilter
    ]
    whitelist << Queries::Filters::Shared::CustomFields::Base if EnterpriseToken.allows_to?(:custom_fields_in_projects_list)

    whitelist.detect { |clazz| filter.is_a? clazz }
  end

  def no_projects_result_box_params
    if User.current.allowed_to?(:add_project, nil, global: true)
      { action_url: new_project_path, display_action: true }
    else
      {}
    end
  end

  def project_more_menu_items(project)
    [project_more_menu_subproject_item(project),
     project_more_menu_settings_item(project),
     project_more_menu_archive_item(project),
     project_more_menu_unarchive_item(project),
     project_more_menu_copy_item(project),
     project_more_menu_delete_item(project)].compact
  end

  def project_more_menu_subproject_item(project)
    if User.current.allowed_to? :add_subprojects, project
      [t(:label_subproject_new),
       new_project_path(parent_id: project.id),
       class: 'icon-context icon-add',
       title: t(:label_subproject_new)]
    end
  end

  def project_more_menu_settings_item(project)
    if User.current.allowed_to?({ controller: '/project_settings/generic', action: 'show' }, project)
      [t(:label_project_settings),
       { controller: '/project_settings/generic', action: 'show', id: project },
       class: 'icon-context icon-settings',
       title: t(:label_project_settings)]
    end
  end

  def project_more_menu_archive_item(project)
    if User.current.admin? && project.active?
      [t(:button_archive),
       archive_project_path(project, status: params[:status]),
       data: { confirm: t('project.archive.are_you_sure', name: project.name) },
       method: :put,
       class: 'icon-context icon-locked',
       title: t(:button_archive)]
    end
  end

  def project_more_menu_unarchive_item(project)
    if User.current.admin? && !project.active? && (project.parent.nil? || project.parent.active?)
      [t(:button_unarchive),
       unarchive_project_path(project, status: params[:status]),
       method: :put,
       class: 'icon-context icon-unlocked',
       title: t(:button_unarchive)]
    end
  end

  def project_more_menu_copy_item(project)
    if User.current.allowed_to?(:copy_projects, project) && !project.archived?
      [t(:button_copy),
       copy_from_project_path(project, :admin),
       class: 'icon-context icon-copy',
       title: t(:button_copy)]
    end
  end

  def project_more_menu_delete_item(project)
    if User.current.admin
      [t(:button_delete),
       confirm_destroy_project_path(project),
       class: 'icon-context icon-delete',
       title: t(:button_delete)]
    end
  end

  def project_options_for_status(project)
    contract = if project.new_record?
                 Projects::CreateContract
               else
                 Projects::UpdateContract
               end

    contract
      .new(project, current_user)
      .assignable_status_codes
      .map do |code|
      [I18n.t("activerecord.attributes.project/status.codes.#{code}"), code]
    end
  end

  def shorten_text(text, length)
    text.to_s.gsub(/\A(.{#{length}[^\n\r]*).*\z/m, '\1...').strip
  end

  def projects_with_level(projects)
    ancestors = []

    projects.each do |project|
      while !ancestors.empty? && !project.is_descendant_of?(ancestors.last)
        ancestors.pop
      end

      yield project, ancestors.count

      ancestors << project
    end
  end

  def project_css_classes(project)
    s = 'project'

    s << ' root' if project.root?
    s << ' child' if project.child?
    s << (project.leaf? ? ' leaf' : ' parent')

    s
  end

  def projects_level_list_json(projects)
    projects_list = projects.map do |item|
      project = item[:project]

      {
        "id": project.id,
        "name": project.name,
        "identifier": project.identifier,
        "has_children": !project.leaf?,
        "level": item[:level]
      }
    end

    { projects: projects_list }
  end

  def projects_with_levels_order_sensitive(projects, &block)
    if sorted_by_lft?
      project_tree(projects, &block)
    else
      projects_with_level(projects, &block)
    end
  end

  # Just like sort_header tag but removes sorting by
  # lft from the sort criteria as lft is mutually exclusive with
  # the other criteria.
  def projects_sort_header_tag(*args)
    former_criteria = @sort_criteria.criteria.dup

    @sort_criteria.criteria.reject! { |a, _| a == 'lft' }

    sort_header_tag(*args)
  ensure
    @sort_criteria.criteria = former_criteria
  end

  def deactivate_class_on_lft_sort
    if sorted_by_lft?
      '-inactive'
    end
  end

  def href_only_when_not_sort_lft
    unless sorted_by_lft?
      "href=#{projects_path(sortBy: JSON::dump([['lft', 'asc']]))}"
    end
  end

  def sorted_by_lft?
    @sort_criteria.first_key == 'lft'
  end

  def allowed_parent_projects(project)
    if project.persisted?
      Projects::UpdateContract
    else
      Projects::CreateContract
    end.new(project, current_user)
       .assignable_parents
  end

  def short_project_description(project, length = 255)
    unless project.description.present?
      return ''
    end

    project.description.gsub(/\A(.{#{length}}[^\n\r]*).*\z/m, '\1...').strip
  end
end