defmodule EffusionWeb.Schema do
  use Absinthe.Schema
  alias EffusionWeb.Resolvers

  import_types Absinthe.Type.Custom
  import_types Effusion.Schema.Binary

  enum :torrent_status do
    description "The current downloading state of a torrent."
    value :paused, as: "paused", description: "The torrent has been halted."
    value :downloading, as: "downloading", description: "The torrent is actively looking for connections and downloading data."
    value :finished, as: "finished", description: "The torrent has downloaded and written all pieces."
  end

  object :torrent do
    description """
    A torrent that Effusion is currently downloading.
    """

    field :id, :string do
      description "The torrent's info hash."
      resolve fn torrent, _, _ ->
        {:ok, torrent.info_hash |> Effusion.Hash.encode()}
      end
    end
    field :name, :string, description: "The name of the torrent."
    field :downloaded, :integer do
      description "How many of this torrent's bytes have been downloaded."
      resolve &Resolvers.Torrents.downloaded/3
    end
    field :left, :integer, description: "How many of this torrent's bytes still need to be downloaded before the download is complete."
    field :started, :datetime, description: "When Effusion started downloading this torrent"
    field :state, :torrent_status, description: "The current downloading state of the torrent."
    field :announce, :string, description: "The main announce URL to send download updates to."
    field :size, :integer, description: "The total number of bytes in this torrent."
    field :piece_size, :integer, description: "The nominal number of bytes in each piece of this torrent."
    field :comment, :string, description: "The comment left in the torrent's metadata file."
    field :created_by, :string, description: "The person or program that assembled this torrent's metadata file."
    field :creation_date, :datetime, description: "The date the torrent file was created."
    field :last_announce, :datetime, description: "The last time the announce server was contacted."
    field :next_announce, :datetime, description: "The next time the announce server should be contacted."
    field :connected_peers_count, :integer do
      description "The number of peers we are currently connected to."
      resolve &Resolvers.Torrents.connected_peers_count/3
    end
    field :available_peers_count, :integer do
      description "The number of peers for this torrent that the application can contact."
      resolve &Resolvers.Torrents.available_peers_count/3
    end
  end

  object :session do
    description "Global statistics across all torrents"
    field :download_bytes_per_second, :integer do
      description "The average number of downloaded bytes per second."
      resolve &Resolvers.Sessions.download_bytes_per_second/3
    end
    field :upload_bytes_per_second, :integer do
      description "The average number of uploaded bytes per second."
      resolve &Resolvers.Sessions.upload_bytes_per_second/3
    end
  end

  query do
    field :session, :session do
      description "Get global statistics across all torrents."
      # all stats will come from field resolvers
      resolve fn _, _, _ -> {:ok, %{}} end
    end

    field :torrents, list_of(:torrent) do
      description "Get all torrents that are being downloaded."
      resolve &Resolvers.Torrents.all_torrents/3
    end

    field :torrent, :torrent do
      description "Get a torrent"
      arg :id, non_null(:id), description: "The info hash of the torrent to get."
      resolve &Resolvers.Torrents.find_torrent/3
    end
  end

  mutation do
    field :add_torrent, type: :torrent do
      description "Add a torrent metainfo file to start downloading"
      arg :meta, non_null(:binary), description: "The base64-encoded metadata file (.torrent file) of the torrent to download."
      resolve &Resolvers.Torrents.add_torrent/3
    end

    field :pause_torrent, type: :torrent do
      description "Halt a torrent's downloading."
      arg :id, non_null(:id), description: "The info hash of the torrent to pause."
      resolve &Resolvers.Torrents.pause_torrent/3
    end

    field :start_torrent, type: :torrent do
      description "Start or restart torrent's downloading."
      arg :id, non_null(:id), description: "The info hash of the torrent to start."
      resolve &Resolvers.Torrents.start_torrent/3
    end
  end
end