class PostImportsController < ApplicationController
  before_action :require_member!

  def preview
    rows = PostImportPreviewer.new(existing: params[:existing]).preview_rows(
        rows: PostImportUrlListParser.parse(params[:source]))
    render json: { rows: }
  rescue ArgumentError => e
    render_bad_request(e.message)
  end

  def validate
    rows = normalised_import_rows(allow_warning_fields: true)
    changed_row = Integer(params[:changed_row], exception: false)
    result =
        PostImportPreviewer.new(existing: params[:existing])
          .preview_rows(rows:, fetch_metadata: changed_row, metadata_cache: {})
    render json: { rows: result }
  rescue ArgumentError => e
    render_bad_request(e.message)
  end

  def create
    result = PostImportRunner.new(
        actor: current_user,
        rows: normalised_import_rows,
        existing: params[:existing]).run
    render json: result, status: result[:created].positive? ? :created : :ok
  rescue ArgumentError => e
    render_bad_request(e.message)
  end

  private

  def require_member!
    return head :unauthorized unless current_user
    return if current_user.gte_member?

    head :forbidden
  end

  def normalised_import_rows allow_warning_fields: false
    PostImportRowNormaliser.normalise!(params[:rows], allow_warning_fields:)
  end
end