require 'fiona7/builder/lazy_blob_copier'

module Fiona7
  module Controllers
    module RestAPI
      class BlobController
        def fetch(blob_id, transformation=false)
          public_get_url = BinaryHandling::UrlGenerator.new(blob_id, 'public_access', 'get', transformation).generate
          # all URLs are identical!
          # private_get_url = BinaryHandling::UrlGenerator.new(blob_id, 'private_access', 'get', false).generate
          # public_head_url = BinaryHandling::UrlGenerator.new(blob_id, 'public_access', 'head', false).generate
          # private_head_url = BinaryHandling::UrlGenerator.new(blob_id, 'private_access', 'head', false).generate
          private_head_url = public_head_url = private_get_url = public_get_url

          return {
            'public_access' => {
              'get' => {
                'url' => public_get_url
              },
              'head' => {
                'url' => public_head_url
              }
            },
            'private_access' => {
              'get' => {
                'url' => private_get_url
              },
              'head' => {
                'url' => private_head_url
              }
            }
          }
        end

        def metadata(blob_id)
          meta_binary = BinaryHandling::MetaBinary.new(blob_id)
          content_type = meta_binary.mime_type
          content_length = meta_binary.length

          if meta_binary.image?
            width = meta_binary.width
            height = meta_binary.height
          else
            width = 0
            height = 0
          end
          {
            'meta_data' => {
              'content_type' => ['string', content_type],
              'content_length' => ['number', content_length],
              'width' => ['number', width],
              'height' => ['number', height]
            }
          }
        end

        def copy(blob_id, params)
          input              = params.symbolize_keys
          blob_id            = blob_id
          destination_obj_id = input[:destination_obj_id]
          filename           = input[:filename]
          content_type       = input[:content_type]
          destination_obj    = Fiona7::WriteObj.find(destination_obj_id)

          destination_obj.reload_attributes

          binary_spec = Fiona7::Builder::LazyBlobCopier.new({
            destination_obj: destination_obj,
            source_blob_id: blob_id,
            filename: filename,
            content_type: content_type
          }).call.stringify_keys

          destination_obj.save!

          return binary_spec
        end
      end
    end
  end
end