defmodule Bump.Database do
  alias Bump.Repo
  alias Bump.Messages.Message
  alias Bump.Senders.Sender
  import Ecto.Query

  def pop(sender) do
    query = from m in "messages",
            where: m.sender == ^sender,
            order_by: [desc: m.timestamp],
            limit: 1,
            select: %{id: m.id, title: m.title, data: m.data, timestamp: m.timestamp}

    res = Repo.one(query)

    if not is_nil(res) do
      Repo.delete_all(from m in "messages", where: m.id == ^res.id)
    %{title: res.title, data: res.data, timestamp: res.timestamp}
    else
    %{} 
    end

  end

  def peek(sender) do
    query = from m in "messages",
            where: m.sender == ^sender,
            order_by: [desc: m.timestamp],
            limit: 1,
            select: %{title: m.title, data: m.data, timestamp: m.timestamp}
    Repo.one(query)
  end

  def list(sender, minutes) do

    ago = DateTime.utc_now 
          |> Timex.shift(minutes: -minutes) 
          |> DateTime.truncate(:second)

    query = from m in "messages",
            where: m.sender == ^sender and
            m.timestamp >= ^ago,
            select: %{title: m.title, data: m.data, timestamp: m.timestamp}

    Repo.all(query)
  end

  def clear(sender) do
    query = from m in "messages",
            where: m.sender == ^sender

    Repo.delete_all(query)
  end


  def push(sender, title, data) do
    time = DateTime.utc_now |> DateTime.truncate(:second)

    Repo.insert(%Message{sender: sender, title: title, data: data, timestamp: time})

  end

  def addSender(sender, %{"firebase" => firebase}) do
    query = from s in "senders",
            where: s.sender == ^sender and
            s.firebase_token == ^firebase,
            select: %{id: s.id} 

    if(Repo.all(query) == []) do
      IO.puts("Adding sender: #{sender}")
      Repo.insert(%Sender{sender: sender, firebase_token: firebase})
    end
  end

  def deleteSender(sender) do
    query = from s in "senders",
            where: s.sender == ^sender

    Repo.delete_all(query)
  end

  def tokens(sender) do
    query = from s in "senders",
            where: s.sender == ^sender,
            select: %{firebase_token: s.firebase_token}

    Repo.all(query)
  end

end