# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only

defmodule Pleroma.ReleaseTasks do
  @repo Pleroma.Repo

  def run(args) do
    [task | args] = String.split(args)

    case task do
      "migrate" -> migrate(args)
      "create" -> create()
      "rollback" -> rollback(args)
      task -> mix_task(task, args)
    end
  end

  def find_module(task) do
    module_name =
      task
      |> String.split(".")
      |> Enum.map(&String.capitalize/1)
      |> then(fn x -> [Mix, Tasks, Pleroma] ++ x end)
      |> Module.concat()

    case Code.ensure_loaded(module_name) do
      {:module, _} -> module_name
      _ -> nil
    end
  end

  defp mix_task(task, args) do
    Application.load(:pleroma)

    module = find_module(task)

    if module do
      module.run(args)
    else
      IO.puts("The task #{task} does not exist")
    end
  end

  def migrate(args) do
    Mix.Tasks.Pleroma.Ecto.Migrate.run(args)
  end

  def rollback(args) do
    Mix.Tasks.Pleroma.Ecto.Rollback.run(args)
  end

  def create do
    Application.load(:pleroma)

    case @repo.__adapter__.storage_up(@repo.config) do
      :ok ->
        IO.puts("The database for #{inspect(@repo)} has been created")

      {:error, :already_up} ->
        IO.puts("The database for #{inspect(@repo)} has already been created")

      {:error, term} when is_binary(term) ->
        IO.puts(:stderr, "The database for #{inspect(@repo)} couldn't be created: #{term}")
    end
  end
end