class AssetsController < ApplicationController
  include WopiUtil
  # include ActionView::Helpers
  include ActionView::Helpers::AssetTagHelper
  include ActionView::Helpers::TextHelper
  include ActionView::Helpers::UrlHelper
  include ActionView::Context
  include InputSanitizeHelper
  include FileIconsHelper
  include WopiHelper

  before_action :load_vars
  before_action :check_read_permission, except: :file_present
  before_action :check_edit_permission, only: :edit

  def file_present
    respond_to do |format|
      format.json do
        if @asset.file.processing?
          render json: {}, status: 404
        else
          # Only if file is present,
          # check_read_permission
          check_read_permission

          # If check_read_permission already rendered error,
          # stop execution
          return if performed?

          # If check permission passes, return :ok
          render json: {
            'asset-id' => @asset.id,
            'image-tag-url' => @asset.url(:medium),
            'preview-url' => large_image_url_asset_path(@asset),
            'filename' => truncate(@asset.file_file_name,
                                   length:
                                     Constants::FILENAME_TRUNCATION_LENGTH),
            'download-url' => download_asset_path(@asset),
            'type' => asset_data_type(@asset),
            'wopi-file-name' => wopi_asset_file_name(@asset, true),
            'wopi-edit' => (wopi_asset_edit_button(@asset) if wopi_file?(@asset)),
            'wopi-view' => (wopi_asset_view_button(@asset) if wopi_file?(@asset))
          }, status: 200
        end
      end
    end
  end

  def large_image_url
    respond_to do |format|
      format.json do
        render json: {
          'large-preview-url' => @asset.url(:large),
          'filename' => truncate(@asset.file_file_name,
                                 length:
                                   Constants::FILENAME_TRUNCATION_LENGTH),
          'download-url' => download_asset_path(@asset),
          'type' => (@asset.is_image? ? 'image' : 'file')
        }
      end
    end
  end

  def download
    if !@asset.file_present
      render_404 and return
    elsif @asset.file.is_stored_on_s3?
      redirect_to @asset.presigned_url(download: true), status: 307
    else
      send_file @asset.file.path, filename: URI.unescape(@asset.file_file_name),
        type: @asset.file_content_type
    end
  end

  def edit
    @action_url = append_wd_params(@asset
                                   .get_action_url(current_user, 'edit', false))
    @favicon_url = @asset.favicon_url('edit')
    tkn = current_user.get_wopi_token
    @token = tkn.token
    @ttl = (tkn.ttl * 1000).to_s
    create_wopi_file_activity(current_user, true)

    render layout: false
  end

  def view
    @action_url = append_wd_params(@asset
                                   .get_action_url(current_user, 'view', false))
    @favicon_url = @asset.favicon_url('view')
    tkn = current_user.get_wopi_token
    @token = tkn.token
    @ttl = (tkn.ttl * 1000).to_s

    render layout: false
  end

  private

  def load_vars
    @asset = Asset.find_by_id(params[:id])
    render_404 unless @asset

    step_assoc = @asset.step
    result_assoc = @asset.result
    @assoc = step_assoc unless step_assoc.nil?
    @assoc = result_assoc unless result_assoc.nil?

    if @assoc.class == Step
      @protocol = @asset.step.protocol
    else
      @my_module = @assoc.my_module
    end
  end

  def check_read_permission
    if @assoc.class == Step
      if @protocol.in_module? && !can_view_or_download_step_assets(@protocol) ||
         @protocol.in_repository? && !can_read_protocol_in_repository?(@protocol)
        render_403 and return
      end
    elsif @assoc.class == Result
      unless can_view_or_download_result_assets(@my_module)
        render_403 and return
      end
    end
  end

  def check_edit_permission
    if @assoc.class == Step
      if @protocol.in_module? && !can_edit_step_in_protocol(@protocol) ||
         @protocol.in_repository? && !can_update_protocol_in_repository?(@protocol)
        render_403 and return
      end
    elsif @assoc.class == Result
      unless can_edit_result_asset_in_module(@my_module)
        render_403 and return
      end
    end
  end

  def append_wd_params(url)
    wd_params = ''
    params.keys.select { |i| i[/^wd.*/] }.each do |wd|
      next if wd == 'wdPreviousSession' || wd == 'wdPreviousCorrelation'
      wd_params += "&#{wd}=#{params[wd]}"
    end
    url + wd_params
  end

  def asset_params
    params.permit(
      :file
    )
  end

  def asset_data_type(asset)
    return 'wopi' if wopi_file?(asset)
    return 'image' if asset.is_image?
    'file'
  end
end