class ModelFilesController < ApplicationController
  include ActionController::Live

  rate_limit to: 10, within: 3.minutes, only: :create

  before_action :get_model
  before_action -> { @purpose = "download" }, only: [:show, :raw]
  before_action -> { @purpose = "write" }, only: [:raw_put]
  before_action :get_file, except: [:create, :bulk_edit, :bulk_update]
  before_action -> { set_indexable @file }, except: [:create, :bulk_edit, :bulk_update]

  skip_after_action :verify_authorized, only: [:bulk_edit, :bulk_update]
  after_action :verify_policy_scoped, only: [:bulk_edit, :bulk_update]

  def configure_content_security_policy
    # If embed mode, allow any frame ancestor
    content_security_policy.frame_ancestors [:https, :http] if embedded?
  end

  def show
    if embedded?
      respond_to do |format|
        format.html { render "embedded", layout: "embed" }
      end
    elsif stale?(@file)
      @duplicates = @file.duplicates
      @related = Naturally.sort([@file, @file.related_files, @file.files_related_to_me].flatten.uniq, by: :name_and_filename) if @file.relationships.any? || @file.reverse_relationships.any?
      respond_to do |format|
        format.html
        format.manyfold_api_v0 { render json: ManyfoldApi::V0::ModelFileSerializer.new(@file, current_user: current_user).serialize }
        format.any(*MediaType.indexable_types.map(&:to_sym)) do
          attachment = @file.attachment(params[:derivative]) || @file.attachment
          send_file_content attachment, derivative: params[:derivative], disposition: (params[:download] == "true") ? :attachment : :inline
        end
      end
    end
    # i18n-tasks-use t("activerecord.attributes.model_file.filename")
    # i18n-tasks-use t("activerecord.attributes.model_file.digest")
    # i18n-tasks-use t("activerecord.attributes.model_file.size")
    # i18n-tasks-use t("activerecord.attributes.model_file.dimensions")
  end

  def raw
    request.format = params[:format].downcase
    respond_to @file.mime_type.to_sym
    send_file_content @file.attachment, disposition: (params[:download] == "true") ? :attachment : :inline
  end

  def raw_put
    body_type = request.content_type.split(";", 2).first
    body = case body_type
    when @file.mime_type.to_s
      request.body
    when Mime[:url_encoded_form].to_s
      StringIO.new(params.expect(:body))
    end
    if request.content_length > 0 && body
      @file.attachment_attacher.attach(body, metadata: {"mime_type" => @file.mime_type&.to_s}.compact)
      @file.save!
      @file.parse_metadata_later
      if body_type == Mime[:url_encoded_form].to_s
        redirect_to [@file.model, @file] # Redirect if this came from a form
      else
        head :ok
      end
    else
      head :bad_request
    end
  end

  def create
    authorize @model, :edit?
    if params[:convert]
      file = @model.model_files.find_param(params[:convert][:id])
      authorize(file, :convert?)
      file.convert_later params[:convert][:to]
      redirect_back_or_to [@model, file], notice: t(".conversion_started")
    elsif !(p = upload_params).empty?
      p.dig(:model, :file).each_pair do |_id, tus_upload|
        AddUploadedFileToModelJob.perform_later(@model.id, tus_upload)
      end
      respond_to do |format|
        format.html { redirect_to @model, notice: t(".success") }
        format.manyfold_api_v0 { head :accepted }
      end
    else
      head :unprocessable_content
    end
  end

  def update
    result = @file.update(file_params)
    respond_to do |format|
      format.html do
        if result
          current_user.set_list_state(@file, :printed, params[:model_file][:printed] === "1")
          redirect_to [@model, @file], notice: t(".success")
        else
          render :edit, alert: t(".failure"), status: :unprocessable_content
        end
      end
      format.manyfold_api_v0 do
        if result
          render json: ManyfoldApi::V0::ModelFileSerializer.new(@file).serialize
        else
          render json: @file.errors.to_json, status: :unprocessable_content
        end
      end
    end
  end

  def edit_content
    @editor = FileHandlers.handlers_for(environment: :edit, mime_type: @file.mime_type).first
    raise ActionController::BadRequest unless @editor
  end

  def extract
    ExtractArchiveJob.perform_later(@file.id)
    respond_to do |format|
      format.html do
        redirect_back_or_to [@model, @file], notice: t(".extraction_started")
      end
    end
  end

  def bulk_edit
    authorize @model, :edit?
    @files = policy_scope(@model.model_files.without_special)
  end

  def bulk_update
    authorize @model, :edit?
    hash = bulk_update_params
    ids_to_update = params[:model_files].keep_if { |key, value| value == "1" }.keys
    files = policy_scope(@model.model_files.without_special).where(public_id: ids_to_update)
    files.each do |file|
      ActiveRecord::Base.transaction do
        current_user.set_list_state(file, :printed, params[:printed] === "1")
        options = {}
        if params[:pattern].present?
          options[:filename] =
            file.filename.split(file.extension).first.gsub(params[:pattern], params[:replacement]) +
            file.extension
        end
        file.update(hash.merge(options))
      end
    end
    if params[:split]
      new_model = @model.split! files: files
      redirect_to model_path(new_model), notice: t(".success")
    else
      redirect_back_or_to model_path(@model), notice: t(".success")
    end
  end

  def destroy
    authorize @file
    @file.delete_from_disk_and_destroy
    respond_to do |format|
      format.html do
        if request.referer && (URI.parse(request.referer).path == model_model_file_path(@model, @file))
          # If we're coming from the file page itself, we can't go back there
          redirect_to model_path(@model), notice: t(".success")
        else
          redirect_back_or_to model_path(@model), notice: t(".success")
        end
      end
      format.manyfold_api_v0 { head :no_content }
    end
  end

  private

  def bulk_update_params
    params.permit(
      :presupported,
      :y_up,
      :previewable
    ).compact_blank
  end

  def file_params
    if is_api_request?
      raise ActionController::BadRequest unless params[:json]
      ManyfoldApi::V0::ModelFileDeserializer.new(object: params[:json], user: current_user, record: @file).deserialize
    else
      Form::ModelFileDeserializer.new(params: params, user: current_user, record: @file).deserialize
    end
  end

  def upload_params
    if is_api_request?
      raise ActionController::BadRequest unless params[:json]
      ManyfoldApi::V0::UploadedFileDeserializer.new(object: params[:json], user: current_user).deserialize
    else
      Form::UploadedFileDeserializer.new(params: params, user: current_user).deserialize
    end
  end

  def get_model
    @model = Model.find_param(params[:model_id])
  end

  def get_file
    scope = @model.model_files
    begin
      @file = scope.find_param(params[:id])
    rescue ActiveRecord::RecordNotFound
      @file = scope.find_by!(
        filename: [
          params[:filename],
          [params[:filename], params[:format]].join("."),
          [params[:id], params[:format]].join(".")
        ]
      )
      request.format = params[:format].downcase
    end
    # Check for signed download URLs
    if has_signed_id? && @purpose
      @signed_file = @model.model_files.find_signed!(params[:sig], purpose: @purpose)
      if @file == @signed_file
        skip_authorization
      else
        raise ActiveRecord::RecordNotFound
      end
    else
      authorize @file
    end
    @title = @file.name
  rescue ActiveSupport::MessageVerifier::InvalidSignature
    raise ActiveRecord::RecordNotFound
  end

  def embedded?
    params[:embed] == "true"
  end
end