class MailImagesController < ApplicationController
  before_action :require_current_project!

  MAX_BYTES = 5.megabytes
  ALLOWED_TYPES = %w[image/jpeg image/png image/gif image/webp].freeze

  def create
    file = params[:file]
    unless file.respond_to?(:content_type)
      return render json: { error: "Seleziona un'immagine." }, status: :unprocessable_entity
    end

    content_type = Marcel::MimeType.for(file, name: file.original_filename, declared_type: file.content_type)
    unless ALLOWED_TYPES.include?(content_type)
      return render json: { error: "Formato non valido. Usa JPG, PNG, GIF o WebP." }, status: :unprocessable_entity
    end

    if file.size > MAX_BYTES
      return render json: { error: "L'immagine supera i 5 MB." }, status: :unprocessable_entity
    end

    blob = ActiveStorage::Blob.create_and_upload!(
      io: file,
      filename: file.original_filename.presence || "immagine",
      content_type: content_type
    )

    render json: { url: url_for(blob) }
  end
end