#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
#
# Copyright (C) 2012-2013 the OpenProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

module CustomFieldsHelper

  def custom_fields_tabs
    tabs = [{:name => 'IssueCustomField', :partial => 'custom_fields/index', :label => :label_issue_plural},
            {:name => 'TimeEntryCustomField', :partial => 'custom_fields/index', :label => :label_spent_time},
            {:name => 'ProjectCustomField', :partial => 'custom_fields/index', :label => :label_project_plural},
            {:name => 'VersionCustomField', :partial => 'custom_fields/index', :label => :label_version_plural},
            {:name => 'UserCustomField', :partial => 'custom_fields/index', :label => :label_user_plural},
            {:name => 'GroupCustomField', :partial => 'custom_fields/index', :label => :label_group_plural},
            {:name => 'TimeEntryActivityCustomField', :partial => 'custom_fields/index', :label => TimeEntryActivity::OptionName},
            {:name => 'IssuePriorityCustomField', :partial => 'custom_fields/index', :label => IssuePriority::OptionName},
            {:name => 'DocumentCategoryCustomField', :partial => 'custom_fields/index', :label => DocumentCategory::OptionName}
            ]
  end

  # Return custom field html tag corresponding to its format
  def custom_field_tag(name, custom_value)
    custom_field = custom_value.custom_field
    field_name = "#{name}[custom_field_values][#{custom_field.id}]"
    field_id = "#{name}_custom_field_values_#{custom_field.id}"

    field_format = Redmine::CustomFieldFormat.find_by_name(custom_field.field_format)

    tag = case field_format.try(:edit_as)
    when "date"
      text_field_tag(field_name, custom_value.value, :id => field_id, :size => 10) +
      calendar_for(field_id)
    when "text"
      text_area_tag(field_name, custom_value.value, :id => field_id, :rows => 3, :style => 'width:90%')
    when "bool"
      hidden_field_tag(field_name, '0') + check_box_tag(field_name, '1', custom_value.true?, :id => field_id)
    when "list"
      blank_option = custom_field.is_required? ?
                       (custom_field.default_value.blank? ? "<option value=\"\">--- #{l(:actionview_instancetag_blank_option)} ---</option>".html_safe : '') :
                       '<option></option>'.html_safe
      select_tag(field_name, blank_option + options_for_select(custom_field.possible_values_options(custom_value.customized), custom_value.value), :id => field_id)
    else
      text_field_tag(field_name, custom_value.value, :id => field_id)
    end

    custom_value.errors.empty? ?
      tag :
      ActionView::Base.wrap_with_error_span(tag, custom_value, "value")
  end

  # Return custom field label tag
  def custom_field_label_tag(name, custom_value)
    content_tag "label", h(custom_value.custom_field.name) +
      (custom_value.custom_field.is_required? ? content_tag("span", ' *', :class => "required") : ""),
      :for => "#{name}_custom_field_values_#{custom_value.custom_field.id}",
      :class => (custom_value.errors.empty? ? nil : "error" )
  end

  def blank_custom_field_label_tag(name, custom_field)
    content_tag "label", h(custom_field.name) +
    (custom_field.is_required? ? content_tag("span", ' *', :class => "required") : ""),
    :for => "#{name}_custom_field_values_#{custom_field.id}"
  end

  # Return custom field tag with its label tag
  def custom_field_tag_with_label(name, custom_value)
    custom_field_label_tag(name, custom_value) + custom_field_tag(name, custom_value)
  end

  def custom_field_tag_for_bulk_edit(name, custom_field)
    field_name = "#{name}[custom_field_values][#{custom_field.id}]"
    field_id = "#{name}_custom_field_values_#{custom_field.id}"
    field_format = Redmine::CustomFieldFormat.find_by_name(custom_field.field_format)
    case field_format.try(:edit_as)
      when "date"
        text_field_tag(field_name, '', :id => field_id, :size => 10) +
        calendar_for(field_id)
      when "text"
        text_area_tag(field_name, '', :id => field_id, :rows => 3, :style => 'width:90%')
      when "bool"
        select_tag(field_name, options_for_select([[l(:label_no_change_option), ''],
                                                   [l(:general_text_yes), '1'],
                                                   [l(:general_text_no), '0']]), :id => field_id)
      when "list"
        select_tag(field_name, options_for_select([[l(:label_no_change_option), '']] + custom_field.possible_values_options), :id => field_id)
      else
        text_field_tag(field_name, '', :id => field_id)
    end
  end

  # Return a string used to display a custom value
  def show_value(custom_value)
    return "" unless custom_value
    format_value(custom_value.value, custom_value.custom_field.field_format)
  end

  # Return a string used to display a custom value
  def format_value(value, field_format)
    Redmine::CustomFieldFormat.format_value(value, field_format) # Proxy
  end

  # Return an array of custom field formats which can be used in select_tag
  def custom_field_formats_for_select(custom_field)
    Redmine::CustomFieldFormat.as_select(custom_field.class.customized_class.name)
  end

  # Renders the custom_values in api views
  def render_api_custom_values(custom_values, api)
    api.array :custom_fields do
      custom_values.each do |custom_value|
        api.custom_field :id => custom_value.custom_field_id, :name => custom_value.custom_field.name do
          api.value custom_value.value
        end
      end
    end unless custom_values.empty?
  end
end