# frozen_string_literal: true

module API
  class MarkdownUploads < ::API::Base
    include PaginationParams

    feature_category :team_planning

    FILENAME_QUERY_PARAM_REQUIREMENTS = API::NAMESPACE_OR_PROJECT_REQUIREMENTS.merge(
      filename: API::NO_SLASH_URL_PART_REGEX
    )

    helpers do
      def find_uploads(parent)
        uploads = Banzai::UploadsFinder.new(parent: parent).execute
        uploads.preload_uploaded_by_user
      end

      def find_upload(parent, upload_id: nil, secret: nil, filename: nil)
        finder = Banzai::UploadsFinder.new(parent: parent)

        if upload_id
          finder.find(upload_id)
        else
          finder.find_by_secret_and_filename(secret, filename)
        end
      end
    end

    resource :projects, requirements: API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
      desc 'Workhorse authorize the file upload' do
        detail 'This feature was introduced in GitLab 13.11'
        success code: 200
        failure [
          { code: 404, message: 'Not found' }
        ]
        tags %w[projects]
      end
      post ':id/uploads/authorize' do
        require_gitlab_workhorse!

        status 200
        content_type Gitlab::Workhorse::INTERNAL_API_CONTENT_TYPE
        FileUploader.workhorse_authorize(has_length: false, maximum_size: user_project.max_attachment_size)
      end

      desc 'Upload a file' do
        success code: 201, model: Entities::ProjectUpload
        failure [
          { code: 404, message: 'Not found' }
        ]
        tags %w[projects]
      end
      params do
        requires :file, types: [Rack::Multipart::UploadedFile, ::API::Validations::Types::WorkhorseFile],
          desc: 'The attachment file to be uploaded', documentation: { type: 'file' }
      end
      post ':id/uploads' do
        upload = UploadService.new(user_project, params[:file], uploaded_by_user_id: current_user&.id).execute

        present upload, with: Entities::ProjectUpload
      end

      desc 'Get the list of uploads of a project' do
        success code: 200, model: Entities::MarkdownUploadAdmin
        failure [
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        is_array true
        tags %w[projects]
      end
      params do
        use :pagination
      end
      get ':id/uploads' do
        authorize! :admin_upload, user_project

        uploads = find_uploads(user_project)

        present paginate(uploads), with: Entities::MarkdownUploadAdmin
      end

      desc 'Download a single project upload by ID' do
        success File
        failure [
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[projects]
      end
      params do
        requires :upload_id, type: Integer, desc: 'The ID of a project upload'
      end
      get ':id/uploads/:upload_id' do
        # Fetching uploads by ID is maintainer-only because it can be used to enumerate uploads
        # even without the secret
        authorize! :admin_upload, user_project

        upload = find_upload(user_project, upload_id: params[:upload_id])

        present_carrierwave_file!(upload.retrieve_uploader)
      end

      desc 'Download a single project upload by secret and filename' do
        success File
        failure [
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[projects]
      end
      params do
        requires :secret, type: String, desc: 'The 32-character secret of a project upload'
        requires :filename, type: String, file_path: true, desc: 'The filename of a project upload'
      end
      get ':id/uploads/:secret/:filename', requirements: FILENAME_QUERY_PARAM_REQUIREMENTS do
        authorize! :read_upload, user_project

        upload = find_upload(user_project, secret: params[:secret], filename: params[:filename])

        present_carrierwave_file!(upload&.retrieve_uploader)
      end

      desc 'Delete a single project upload by ID' do
        success code: 204
        failure [
          { code: 400, message: 'Bad request' },
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[projects]
      end
      params do
        requires :upload_id, type: Integer, desc: 'The ID of a project upload'
      end
      delete ':id/uploads/:upload_id' do
        authorize! :destroy_upload, user_project

        upload = find_upload(user_project, upload_id: params[:upload_id])
        result = Uploads::DestroyService.new(user_project, current_user).execute(upload)

        if result[:status] == :success
          status 204
        else
          bad_request!(result[:message])
        end
      end

      desc 'Delete a single project upload by secret and filename' do
        success code: 204
        failure [
          { code: 400, message: 'Bad request' },
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[projects]
      end
      params do
        requires :secret, type: String, desc: 'The 32-character secret of a project upload'
        requires :filename, type: String, file_path: true, desc: 'The filename of a project upload'
      end
      delete ':id/uploads/:secret/:filename', requirements: FILENAME_QUERY_PARAM_REQUIREMENTS do
        authorize! :destroy_upload, user_project

        upload = find_upload(user_project, secret: params[:secret], filename: params[:filename])
        result = Uploads::DestroyService.new(user_project, current_user).execute(upload)

        if result[:status] == :success
          status 204
        else
          bad_request!(result[:message])
        end
      end
    end

    resource :groups, requirements: API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
      desc 'Get the list of uploads of a group' do
        success code: 200, model: Entities::MarkdownUploadAdmin
        failure [
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        is_array true
        tags %w[groups]
      end
      params do
        use :pagination
      end
      get ':id/uploads' do
        authorize! :admin_upload, user_group

        uploads = find_uploads(user_group)

        present paginate(uploads), with: Entities::MarkdownUploadAdmin
      end

      desc 'Download a single group upload by ID' do
        success File
        failure [
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[groups]
      end
      params do
        requires :upload_id, type: Integer, desc: 'The ID of a group upload'
      end
      get ':id/uploads/:upload_id' do
        # Fetching uploads by ID is maintainer-only because it can be used to enumerate uploads
        # even without the secret
        authorize! :admin_upload, user_group

        upload = find_upload(user_group, upload_id: params[:upload_id])

        present_carrierwave_file!(upload.retrieve_uploader)
      end

      desc 'Download a single project upload by secret and filename' do
        success File
        failure [
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[groups]
      end
      params do
        requires :secret, type: String, desc: 'The 32-character secret of a group upload'
        requires :filename, type: String, file_path: true, desc: 'The filename of a group upload'
      end
      get ':id/uploads/:secret/:filename', requirements: FILENAME_QUERY_PARAM_REQUIREMENTS do
        authorize! :read_upload, user_group

        upload = find_upload(user_group, secret: params[:secret], filename: params[:filename])

        present_carrierwave_file!(upload&.retrieve_uploader)
      end

      desc 'Delete a single group upload' do
        success code: 204
        failure [
          { code: 400, message: 'Bad request' },
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[groups]
      end
      params do
        requires :upload_id, type: Integer, desc: 'The ID of a group upload'
      end
      delete ':id/uploads/:upload_id' do
        authorize! :destroy_upload, user_group

        upload = find_upload(user_group, upload_id: params[:upload_id])
        result = Uploads::DestroyService.new(user_group, current_user).execute(upload)

        if result[:status] == :success
          status 204
        else
          bad_request!(result[:message])
        end
      end

      desc 'Delete a single group upload by secret and filename' do
        success code: 204
        failure [
          { code: 400, message: 'Bad request' },
          { code: 403, message: 'Unauthenticated' },
          { code: 404, message: 'Not found' }
        ]
        tags %w[groups]
      end
      params do
        requires :secret, type: String, desc: 'The 32-character secret of a group upload'
        requires :filename, type: String, file_path: true, desc: 'The filename of a group upload'
      end
      delete ':id/uploads/:secret/:filename', requirements: FILENAME_QUERY_PARAM_REQUIREMENTS do
        authorize! :destroy_upload, user_group

        upload = find_upload(user_group, secret: params[:secret], filename: params[:filename])
        result = Uploads::DestroyService.new(user_group, current_user).execute(upload)

        if result[:status] == :success
          status 204
        else
          bad_request!(result[:message])
        end
      end
    end
  end
end