#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2018 the OpenProject Foundation (OPF)
#
# 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.
#++

require 'securerandom'

module SettingsHelper
  include OpenProject::FormTagHelper

  def administration_settings_tabs
    [
      { name: 'general', partial: 'settings/general', label: :label_general },
      { name: 'display', partial: 'settings/display', label: :label_display },
      { name: 'authentication', partial: 'settings/authentication', label: :label_authentication },
      { name: 'users', partial: 'settings/users', label: :label_user_plural },
      { name: 'projects', partial: 'settings/projects', label: :label_project_plural },
      { name: 'work_packages', partial: 'settings/work_packages', label: :label_work_package_tracking },
      { name: 'notifications', partial: 'settings/notifications', label: Proc.new { User.human_attribute_name(:mail_notification) } },
      { name: 'mail_handler', partial: 'settings/mail_handler', label: :label_incoming_emails },
      { name: 'repositories', partial: 'settings/repositories', label: :label_repository_plural }
    ]
  end

  def setting_select(setting, choices, options = {})
    if blank_text = options.delete(:blank)
      choices = [[blank_text.is_a?(Symbol) ? I18n.t(blank_text) : blank_text, '']] + choices
    end

    setting_label(setting, options) +
      wrap_field_outer(options) do
        styled_select_tag("settings[#{setting}]",
                          options_for_select(choices, Setting.send(setting).to_s), options)
      end
  end

  def setting_multiselect(setting, choices, options = {})
    setting_label(setting, options) +
      content_tag(:span, class: 'form--field-container -vertical') do
        hidden_field_tag("settings[#{setting}][]", '') +
          choices.map do |choice|
            text, value = (choice.is_a?(Array) ? choice : [choice, choice])

            content_tag(:label, class: 'form--label-with-check-box') do
              styled_check_box_tag("settings[#{setting}][]", value,
                                   Setting.send(setting).include?(value), options.merge(id: nil)) + text.to_s
            end
          end.join.html_safe
      end
  end

  def settings_matrix(settings, choices, options = {})
    content_tag(:table, class: 'form--matrix') do
      content_tag(:thead, build_settings_matrix_head(settings, options)) +
        content_tag(:tbody, build_settings_matrix_body(settings, choices))
    end
  end

  def setting_text_field(setting, options = {})
    unit = options.delete(:unit)
    unit_html = ''

    if unit
      unit_id = SecureRandom.uuid
      options[:'aria-describedby'] = unit_id
      unit_html = content_tag(:span,
                              unit,
                              class: 'form--field-affix',
                              :'aria-hidden' => true,
                              id: unit_id)
    end

    setting_label(setting, options) +
      wrap_field_outer(options) do
        styled_text_field_tag("settings[#{setting}]", Setting.send(setting), options) +
          unit_html
      end
  end

  def setting_text_area(setting, options = {})
    setting_label(setting, options) +
      wrap_field_outer(options) do
        styled_text_area_tag("settings[#{setting}]", Setting.send(setting), options)
      end
  end

  def setting_check_box(setting, options = {})
    setting_label(setting, options) +
      wrap_field_outer(options) do
        tag(:input, type: 'hidden', name: "settings[#{setting}]", value: 0, id: "settings_#{setting}_hidden") +
          styled_check_box_tag("settings[#{setting}]", 1, Setting.send("#{setting}?"), options)
      end
  end

  def setting_password(setting, options = {})
    setting_label(setting, options) +
      wrap_field_outer(options) do
        styled_password_field_tag("settings[#{setting}]", Setting.send(setting), options)
      end
  end

  def setting_label(setting, options = {})
    label = options[:label]
    return ''.html_safe if label == false

    styled_label_tag(
      "settings_#{setting}", I18n.t(label || "setting_#{setting}"),
      options.slice(:title)
    )
  end

  def setting_block(setting, options = {}, &block)
    setting_label(setting, options) + wrap_field_outer(options, &block)
  end

  # Renders a notification field for a Redmine::Notifiable option
  def notification_field(notifiable, options = {})
    content_tag(:label, class: 'form--label-with-check-box' + (notifiable.parent.present? ? ' parent' : '')) do
      styled_check_box_tag('settings[notified_events][]',
                           notifiable.name,
                           Setting.notified_events.include?(notifiable.name),
                           options.merge(id: nil)) +
        l_or_humanize(notifiable.name, prefix: 'label_')
    end
  end

  private

  def wrap_field_outer(options, &block)
    if options[:label] != false
      content_tag(:span, class: 'form--field-container', &block)
    else
      block.call
    end
  end

  def build_settings_matrix_head(settings, options = {})
    content_tag(:tr, class: 'form--matrix-header-row') do
      content_tag(:th, I18n.t(options[:label_choices] || :label_choices),
                  class: 'form--matrix-header-cell') +
        settings.map do |setting|
          content_tag(:th, class: 'form--matrix-header-cell') do
            hidden_field_tag("settings[#{setting}][]", '') +
              I18n.t("setting_#{setting}")
          end
        end.join.html_safe
    end
  end

  def build_settings_matrix_body(settings, choices)
    choices.map do |choice|
      value = choice[:value]
      caption = choice[:caption] || value.to_s
      exceptions = Array(choice[:except]).compact
      content_tag(:tr, class: 'form--matrix-row') do
        content_tag(:td, caption, class: 'form--matrix-cell') +
          settings.map do |setting|
            content_tag(:td, class: 'form--matrix-checkbox-cell') do
              unless exceptions.include?(setting)
                styled_check_box_tag("settings[#{setting}][]", value,
                                     Setting.send(setting).include?(value),
                                     id: "#{setting}_#{value}")
              end
            end
          end.join.html_safe
      end
    end.join.html_safe
  end
end
