class ResultTextsController < ApplicationController
  include ResultsHelper

  before_action :load_vars, only: [:edit, :update, :download]
  before_action :load_vars_nested, only: [:new, :create]
  before_action :load_markdown, only: [ :create, :update ]

  before_action :check_create_permissions, only: [:new, :create]
  before_action :check_edit_permissions, only: [:edit, :update]
  before_action :check_archive_permissions, only: [:update]

  def new
    @result = Result.new(
      user: current_user,
      my_module: @my_module
    )
    @result.build_result_text

    respond_to do |format|
      format.json {
        render json: {
          html: render_to_string({
            partial: "new.html.erb"
          })
        }, status: :ok
      }
    end
  end

  def create
    @result_text = ResultText.new(result_params[:result_text_attributes])
    @result = Result.new(
      user: current_user,
      my_module: @my_module,
      name: result_params[:name],
      result_text: @result_text
    )
    @result.last_modified_by = current_user

    respond_to do |format|
      if (@result.save and @result_text.save) then
        # Generate activity
        Activity.create(
          type_of: :add_result,
          user: current_user,
          project: @my_module.experiment.project,
          my_module: @my_module,
          message: t(
            "activities.add_text_result",
            user: current_user.full_name,
            result: @result.name
          )
        )

        format.html {
          flash[:success] = t(
            "result_texts.create.success_flash",
            module: @my_module.name)
          redirect_to results_my_module_path(@my_module)
        }
        format.json {
          render json: {
            html: render_to_string({
              partial: "my_modules/result.html.erb",
              locals: {
                result: @result,
                markdown: @markdown
              }
            })
          }, status: :ok
        }
      else
        format.json {
          render json: @result.errors, status: :bad_request
        }
      end
    end
  end

  def edit
    respond_to do |format|
      format.json {
        render json: {
          html: render_to_string({
            partial: "edit.html.erb"
          })
        }, status: :ok
      }
    end
  end

  def update
    update_params = result_params
    @result.last_modified_by = current_user
    @result.assign_attributes(update_params)
    success_flash = t("result_texts.update.success_flash",
            module: @my_module.name)
    if @result.archived_changed?(from: false, to: true)
      saved = @result.archive(current_user)
      success_flash = t("result_texts.archive.success_flash",
            module: @my_module.name)
      if saved
        Activity.create(
          type_of: :archive_result,
          project: @my_module.experiment.project,
          my_module: @my_module,
          user: current_user,
          message: t(
            'activities.archive_text_result',
            user: current_user.full_name,
            result: @result.name
          )
        )
      end
    elsif @result.archived_changed?(from: true, to: false)
      render_403
    else
      saved = @result.save

      if saved then
        Activity.create(
          type_of: :edit_result,
          user: current_user,
          project: @my_module.experiment.project,
          my_module: @my_module,
          message: t(
            "activities.edit_text_result",
            user: current_user.full_name,
            result: @result.name
          )
        )
      end
    end
    respond_to do |format|
      if saved
        format.html {
          flash[:success] = success_flash
          redirect_to results_my_module_path(@my_module)
        }
        format.json {
          render json: {
            html: render_to_string({
              partial: "my_modules/result.html.erb",
              locals: {
                result: @result,
                markdown: @markdown
              }
            })
          }, status: :ok
        }
      else
        format.json {
          render json: @result.errors, status: :bad_request
        }
      end
    end
  end

  def download
    send_data @result_text.text, filename: @result_text.result.name + '.txt',
      type: 'plain/text'
  end

  private

  def load_vars
    @result_text = ResultText.find_by_id(params[:id])

    if @result_text
      @result = @result_text.result
      @my_module = @result.my_module
    else
      render_404
    end
  end

  def load_vars_nested
    @my_module = MyModule.find_by_id(params[:my_module_id])

    unless @my_module
      render_404
    end
  end

  # Initialize markdown parser
  def load_markdown
    @markdown = Redcarpet::Markdown.new(
      Redcarpet::Render::HTML.new(
        filter_html: true,
        no_images: true
      )
    )
  end

  def check_create_permissions
    unless can_create_result_text_in_module(@my_module)
      render_403
    end
  end

  def check_edit_permissions
    unless can_edit_result_text_in_module(@my_module)
      render_403
    end
  end

  def check_archive_permissions
    if result_params[:archived].to_s != '' and
      not can_archive_result(@result)
      render_403
    end
  end

  def result_params
    params.require(:result).permit(
      :name, :archived,
      result_text_attributes: [
        :id,
        :text
      ]
    )
  end

end