module WorkPackagesHelper
  def work_package_breadcrumb
    full_path = ancestors_links.unshift(work_package_index_link)

    breadcrumb_paths(*full_path)
  end

  def ancestors_links
    ancestors = controller.ancestors.map do |parent|
      link_to '#' + h(parent.id), work_package_path(parent.id)
    end
  end

  def work_package_index_link
    # TODO: will need to change to work_package index
    link_to(t(:label_issue_plural), {:controller => '/issues', :action => 'index'})
  end

  def work_package_list(work_packages, &block)
    ancestors = []
    work_packages.each do |work_package|
      while (ancestors.any? && !work_package.is_descendant_of?(ancestors.last))
        ancestors.pop
      end
      yield work_package, ancestors.size
      ancestors << work_package unless work_package.leaf?
    end
  end

  def render_work_package_tree_row(work_package, level, relation)
    css_classes = ["work-package"]
    css_classes << "work-package-#{work_package.id}"
    css_classes << "idnt" << "idnt-#{level}" if level > 0

    if relation == "root"
      issue_text = link_to("#{(work_package.kind.nil?) ? '' : h(work_package.kind.name)} ##{work_package.id}",
                             'javascript:void(0)',
                             :style => "color:inherit; font-weight: bold; text-decoration:none; cursor:default;")
    else
      title = []

      if relation == "parent"
        title << content_tag(:span, l(:description_parent_work_package), :class => "hidden-for-sighted")
      elsif relation == "child"
        title << content_tag(:span, l(:description_sub_work_package), :class => "hidden-for-sighted")
      end
      title << ((work_package.kind.nil?) ? '' : h(work_package.kind.name))
      title << "##{work_package.id}"

      issue_text = link_to(title.join(' ').html_safe, work_package_path(work_package))
    end
    issue_text << ": "
    issue_text << truncate(work_package.subject, :length => 60)

    content_tag :tr, :class => css_classes.join(' ') do
      concat content_tag :td, check_box_tag("ids[]", work_package.id, false, :id => nil), :class => 'checkbox'
      concat content_tag :td, issue_text, :class => 'subject'
      concat content_tag :td, h(work_package.status)
      concat content_tag :td, link_to_user(work_package.assigned_to)
      concat content_tag :td, link_to_version(work_package.fixed_version)
    end
  end

  WorkPackageAttribute = Struct.new(:attribute, :field)

  def work_package_form_two_column_attributes(form, work_package, locals = {})
    [
      work_package_form_status_attribute(form, work_package, locals),
      work_package_form_priority_attribute(form, work_package, locals),
      work_package_form_assignee_attribute(form, work_package, locals),
      work_package_form_responsible_attribute(form, work_package, locals),
      work_package_form_issue_category_attribute(form, work_package, locals),
      work_package_form_assignable_versions_attribute(form, work_package, locals),
      work_package_form_start_date_attribute(form, work_package, locals),
      work_package_form_due_date_attribute(form, work_package, locals),
      work_package_form_estimated_hours_attribute(form, work_package, locals),
      work_package_form_done_ratio_attribute(form, work_package, locals),
    ].compact
  end

  def work_package_form_top_attributes(form, work_package, locals = {})
    [
      work_package_form_tracker_attribute(form, work_package, locals),
      work_package_form_type_attribute(form, work_package, locals),
      work_package_form_subject_attribute(form, work_package, locals),
      work_package_form_parent_attribute(form, work_package, locals),
      work_package_form_description_attribute(form, work_package, locals)
    ].compact
  end

  def work_package_form_tracker_attribute(form, work_package, locals = {})
    if work_package.is_a?(Issue)
      field = form.select :tracker_id, locals[:project].trackers.collect {|t| [t.name, t.id]}, :required => true

      field += observe_field :work_package_tracker_id, :url => new_tracker_project_work_packages_path(locals[:project]),
                                                       :update => :attributes,
                                                       :method => :get,
                                                       :with => "Form.serialize('work_package-form')"

      WorkPackageAttribute.new(:tracker, field)
    end
  end

  def work_package_form_type_attribute(form, work_package, locals = {})
    if work_package.is_a?(PlanningElement)
      field = form.select :planning_element_type_id,
                          (locals[:project].planning_element_types.collect { |m| [m.name, m.id] }),
                          :include_blank => true

      WorkPackageAttribute.new(:type, field)
    end
  end

  def work_package_form_subject_attribute(form, work_package, locals = {})
    WorkPackageAttribute.new :subject, form.text_field(:subject, :size => 80, :required => true)
  end

  def work_package_form_parent_attribute(form, work_package, locals = {})
    if User.current.allowed_to?(:manage_subtasks, locals[:project])
      field = if work_package.is_a?(Issue)
                form.text_field :parent_issue_id, :size => 10, :title => l(:description_autocomplete)
              else
                form.text_field :parent_id, :size => 10, :title => l(:description_autocomplete)
              end

      field += '<div id="parent_issue_candidates" class="autocomplete"></div>'.html_safe
      field += javascript_tag "observeWorkPackageParentField('#{issues_auto_complete_path(:id => work_package, :project_id => locals[:project], :escape => false) }')"

      WorkPackageAttribute.new(:parent_issue, field)
    end
  end

  def work_package_form_description_attribute(form, work_package, locals = {})
    field = form.text_area :description,
                           :cols => 60,
                           :rows => (work_package.description.blank? ? 10 : [[10, work_package.description.length / 50].max, 100].min),
                           :accesskey => accesskey(:edit),
                           :class => 'wiki-edit'

    WorkPackageAttribute.new(:description, field)
  end

  def work_package_form_status_attribute(form, work_package, locals = {})
    if work_package.is_a?(Issue)
      allowed = work_package.new_statuses_allowed_to(User.current, true)

      field = if allowed.any?
                form.select(:status_id, (allowed.map {|p| [p.name, p.id]}), :required => true)
              else
                form.label(:status) + work_package.status.name
              end

      WorkPackageAttribute.new(:status, field)
    end
  end

  def work_package_form_priority_attribute(form, work_package, locals = {})
    WorkPackageAttribute.new(:priority,
                             form.select(:priority_id, (locals[:priorities].map {|p| [p.name, p.id]}), {:required => true}, :disabled => attrib_disabled?(work_package, 'priority_id')))
  end

  def work_package_form_assignee_attribute(form, work_package, locals = {})
    WorkPackageAttribute.new(:assignee,
                             form.select(:assigned_to_id, (work_package.assignable_users.map {|m| [m.name, m.id]}), :include_blank => true))
  end

  def work_package_form_responsible_attribute(form, work_package, locals = {})
    WorkPackageAttribute.new(:assignee,
                             form.select(:responsible_id, options_for_responsible(locals[:project]), :include_blank => true))
  end

  def work_package_form_issue_category_attribute(form, work_package, locals = {})
    unless locals[:project].issue_categories.empty?
      field = form.select(:category_id, (locals[:project].issue_categories.collect {|c| [c.name, c.id]}), :include_blank => true)
      field += prompt_to_remote(image_tag('plus.png', :style => 'vertical-align: middle;'),
                                         l(:label_issue_category_new),
                                         'category[name]',
                                         {:controller => '/issue_categories', :action => 'new', :project_id => project},
                                         :title => l(:label_issue_category_new)) if authorize_for('issue_categories', 'new')

      WorkPackageAttribute.new(:category, field)
    end
  end

  def work_package_form_assignable_versions_attribute(form, work_package, locals = {})
    unless work_package.assignable_versions.empty?
      field = form.select(:fixed_version_id,
                          version_options_for_select(work_package.assignable_versions, work_package.fixed_version),
                          :include_blank => true)
      field += prompt_to_remote(image_tag('plus.png', :style => 'vertical-align: middle;'),
                             l(:label_version_new),
                             'version[name]',
                             new_project_version_path(locals[:project]),
                             :title => l(:label_version_new)) if authorize_for('versions', 'new')

      WorkPackageAttribute.new(:fixed_version, field)
    end
  end

  def work_package_form_start_date_attribute(form, work_package, locals = {})
    start_date_field = form.text_field :start_date, :size => 10, :disabled => attrib_disabled?(work_package, 'start_date')
    start_date_field += calendar_for("#{form.object_name}_start_date") unless attrib_disabled?(work_package, 'start_date')

    WorkPackageAttribute.new(:start_date, start_date_field)
  end

  def work_package_form_due_date_attribute(form, work_package, locals = {})
    due_date_field = form.text_field :due_date, :size => 10, :disabled => attrib_disabled?(work_package, 'due_date')
    due_date_field += calendar_for("#{form.object_name}_due_date") unless attrib_disabled?(work_package, 'due_date')

    WorkPackageAttribute.new(:due_date, due_date_field)
  end

  def work_package_form_estimated_hours_attribute(form, work_package, locals = {})
    estimated_hours_field = form.text_field :estimated_hours,
                                            :size => 3,
                                            :disabled => attrib_disabled?(work_package, 'estimated_hours')
    estimated_hours_field += TimeEntry.human_attribute_name(:hours)

    WorkPackageAttribute.new(:estimated_hours, estimated_hours_field)
  end

  def work_package_form_done_ratio_attribute(form, work_package, locals = {})
    if !attrib_disabled?(work_package, 'done_ratio') && Issue.use_field_for_done_ratio?

      field = form.select(:done_ratio, ((0..10).to_a.collect {|r| ["#{r*10} %", r*10] }))

      WorkPackageAttribute.new(:done_ratio, field)
    end
  end
end