module Headmin
  class ThumbnailView
    def initialize(local_assigns)
      @local_assigns = local_assigns
    end

    def class_names
      class_names = [@local_assigns[:class]]
      class_names << "img-thumbnail h-thumbnail"
      class_names.join(" ")
    end

    def width
      @local_assigns[:width] || 150
    end

    def height
      @local_assigns[:height] || 150
    end

    def src
      @local_assigns[:src]
    end

    def icon
      @local_assigns[:icon]
    end

    def mime_type
      if src
        stripped_path = URI.parse(src).path
        extension = File.extname(stripped_path)
        Rack::Mime.mime_type(extension)
      end
    end

    def image?
      mime_type&.match?(/^image/)
    end

    # https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types
    def icon_name
      return icon if icon
      type_map = {
        image: %w[image/bmp image/gif image/vnd.microsoft.icon image/jpeg image/png image/svg+xml image/tiff image/webp],
        play: %w[video/mp4 video/mpeg video/ogg video/mp2t video/webm video/3gpp video/3gpp2],
        music: %w[audio/aac audio/midi audio/x-midi audio/mpeg audio/ogg audio/opus audio/wav audio/webm audio/3gpp audio/3gpp2],
        word: %w[application/msword application/vnd.openxmlformats-officedocument.wordprocessingml.document],
        ppt: %w[application/vnd.ms-powerpoint application/vnd.openxmlformats-officedocument.presentationml.presentation],
        excel: %w[application/vnd.ms-excel application/vnd.openxmlformats-officedocument.spreadsheetml.sheet],
        slides: %w[application/vnd.oasis.opendocument.presentation],
        spreadsheet: %w[application/vnd.oasis.opendocument.spreadsheet],
        richtext: %w[application/vnd.oasis.opendocument.text],
        zip: %w[application/zip application/x-7z-compressed application/x-bzip application/x-bzip2 application/gzip application/vnd.rar],
        pdf: %w[application/pdf]
      }

      type = type_map.find { |key, mime_types| mime_types.include?(mime_type) }
      if type
        ["file", "earmark", type.first].compact.join("-")
      else
        "question"
      end
    end
  end
end