require 'kaminari'

module RailsAdminImageManager
  class File < ApplicationRecord

    # == Extensions ===========================================================

    paginates_per RailsAdminImageManager.options[:paginates_per]

    # == Constants ============================================================

    # == Attributes ===========================================================

    has_dynamic_attached_file :image, styles: { show: '680x480', index: '250x250#', rails_admin: '75x75' }, url: '/rails_admin_image_manager/:id/:style/:filename'

    attr_accessor :src
    attr_accessor :src_for_wysiwyg

    # == Callbacks ============================================================
    before_validation :decode_base64_image

    # == Relationships ========================================================

    has_and_belongs_to_many :tags, class_name: 'RailsAdminImageManager::Tag', join_table: 'image_manager_files_tags', foreign_key: :image_manager_file_id, association_foreign_key: :image_manager_tag_id

    accepts_nested_attributes_for :tags
    # == Validations ==========================================================

    validates_presence_of :name

    validates_attachment  :image, presence: true, content_type: { content_type: /\Aimage\/.*\Z/ }

    # == Scopes ===============================================================

    scope :filter_by_text, -> (text) { where("image_manager_files.name LIKE ? OR image_manager_files.description LIKE ?", "%#{text}%", "%#{text}%") }
    scope :filter_by_tags, -> (tags) { joins(:tags).where('image_manager_files_tags.image_manager_tag_id IN (?)', tags).distinct }
    scope :order_by_date, -> (term) { order("created_at #{term}") }
    scope :order_by_title, -> (term) { order("name #{term}") }

    # == Instance Methods =====================================================

    # To avoid the 500 error when the foreign key constraint fails
    def destroy
      begin
        super
      rescue
        return false
      end
    end

    def decode_base64_image
      if src.present? && src.include?('data:image')
        new_image = Paperclip.io_adapters.for(src)
        new_image.original_filename = "base64.png"
        self.image = new_image
      end
    end

    def src_for_wysiwyg=(params)
      width   = params[:width].to_i
      height  = params[:height].to_i
      if width > 0 && height > 0
        @src_for_wysiwyg = image.dynamic_url("#{width}x#{height}")
      else
        @src_for_wysiwyg = image(:rails_admin)
      end
    end

    def tags_list
      tags.collect { |t| t.name }
    end

    # == Class Methods ========================================================

    self.table_name = 'image_manager_files'

  end
end