module NotesHelper
  def note_target_fields(note)
    if note.noteable
      hidden_field_tag(:target_type, note.noteable.class.name.underscore) +
        hidden_field_tag(:target_id, note.noteable.id)
    end
  end

  def note_supports_quick_actions?(note)
    Notes::QuickActionsService.supported?(note)
  end

  def noteable_json(noteable)
    {
      id: noteable.id,
      class: noteable.class.name,
      resources: noteable.class.table_name,
      project_id: noteable.project.id
    }.to_json
  end

  def diff_view_data
    return {} unless @new_diff_note_attrs

    @new_diff_note_attrs.slice(:noteable_id, :noteable_type, :commit_id)
  end

  def diff_view_line_data(line_code, position, line_type)
    return if @diff_notes_disabled

    data = {
      line_code: line_code,
      line_type: line_type
    }

    if @use_legacy_diff_notes
      data[:note_type] = LegacyDiffNote.name
    else
      data[:note_type] = DiffNote.name
      data[:position] = position.to_json
    end

    data
  end

  def add_diff_note_button(line_code, position, line_type)
    return if @diff_notes_disabled

    button_tag '',
      class: 'add-diff-note js-add-diff-note-button',
      type: 'submit', name: 'button',
      data: diff_view_line_data(line_code, position, line_type),
      title: 'Add a comment to this line' do
      icon('comment-o')
    end
  end

  def link_to_reply_discussion(discussion, line_type = nil)
    return unless current_user

    data = {
      discussion_id: discussion.reply_id,
      discussion_project_id: discussion.project&.id,
      line_type: line_type
    }

    button_tag 'Reply...', class: 'btn btn-text-field js-discussion-reply-button',
                           data: data, title: 'Add a reply'
  end

  def note_max_access_for_user(note)
    note.project.team.max_member_access(note.author_id)
  end

  def discussion_path(discussion)
    if discussion.for_merge_request?
      return unless discussion.diff_discussion?

      version_params = discussion.merge_request_version_params
      return unless version_params

      path_params = version_params.merge(anchor: discussion.line_code)

      diffs_project_merge_request_path(discussion.project, discussion.noteable, path_params)
    elsif discussion.for_commit?
      anchor = discussion.line_code if discussion.diff_discussion?

      project_commit_path(discussion.project, discussion.noteable, anchor: anchor)
    end
  end

  def notes_url(params = {})
    if @snippet.is_a?(PersonalSnippet)
      snippet_notes_path(@snippet, params)
    else
      params.merge!(target_id: @noteable.id, target_type: @noteable.class.name.underscore)

      project_noteable_notes_path(@project, params)
    end
  end

  def note_url(note, project = @project)
    if note.noteable.is_a?(PersonalSnippet)
      snippet_note_path(note.noteable, note)
    else
      project_note_path(project, note)
    end
  end

  def noteable_note_url(note)
    Gitlab::UrlBuilder.build(note)
  end

  def form_resources
    if @snippet.is_a?(PersonalSnippet)
      [@note]
    else
      [@project.namespace.becomes(Namespace), @project, @note]
    end
  end

  def new_form_url
    return nil unless @snippet.is_a?(PersonalSnippet)

    snippet_notes_path(@snippet)
  end

  def can_create_note?
    issuable = @issue || @merge_request

    if @snippet.is_a?(PersonalSnippet)
      can?(current_user, :comment_personal_snippet, @snippet)
    elsif issuable
      can?(current_user, :create_note, issuable)
    else
      can?(current_user, :create_note, @project)
    end
  end

  def initial_notes_data(autocomplete)
    {
      notesUrl: notes_url,
      notesIds: @notes.map(&:id),
      now: Time.now.to_i,
      diffView: diff_view,
      enableGFM: {
        emojis: true,
        members: autocomplete,
        issues: autocomplete,
        mergeRequests: autocomplete,
        epics: autocomplete,
        milestones: autocomplete,
        labels: autocomplete
      }
    }
  end

  def discussions_path(issuable)
    if issuable.is_a?(Issue)
      discussions_project_issue_path(@project, issuable, format: :json)
    else
      discussions_project_merge_request_path(@project, issuable, format: :json)
    end
  end

  def notes_data(issuable)
    {
      discussionsPath: discussions_path(issuable),
      registerPath: new_session_path(:user, redirect_to_referer: 'yes', anchor: 'register-pane'),
      newSessionPath: new_session_path(:user, redirect_to_referer: 'yes'),
      markdownDocsPath: help_page_path('user/markdown'),
      quickActionsDocsPath: help_page_path('user/project/quick_actions'),
      closePath: close_issuable_path(issuable),
      reopenPath: reopen_issuable_path(issuable),
      notesPath: notes_url,
      totalNotes: issuable.discussions.length,
      lastFetchedAt: Time.now.to_i
    }.to_json
  end

  def discussion_resolved_intro(discussion)
    discussion.resolved_by_push? ? 'Automatically resolved' : 'Resolved'
  end

  def rendered_for_merge_request?
    params[:from_merge_request].present?
  end

  def serialize_notes?
    rendered_for_merge_request? || params['html'].nil?
  end
end
