defmodule Superls.CLI do
  @moduledoc false
  alias Superls.{SearchCLI, Store, Password, Store}

  use Superls

  @options [
    store: :string,
    password: :boolean
  ]

  def main(argv) do
    _ = Store.maybe_create_cache_path()

    with {opts, args, []} <-
           OptionParser.parse(argv, aliases: [p: :password, s: :store], strict: @options),
         is_password? <- Keyword.get(opts, :password, false),
         password <- if(is_password?, do: Password.io_get(), else: ""),
         store <- Keyword.get(opts, :store, default_store()),
         password <- Store.check_password(store, password) do
      main_args(args, store, password)
    else
      {_, _, wrong} ->
        IO.puts("invalid command, check #{inspect(wrong)}")
    end
  catch
    err -> IO.puts("#{err}")
  end

  defp main_args(["archive", media_path], store_name, password) do
    Store.archive(media_path, store_name, password)
  end

  defp main_args(["search"], store_name_or_path, password) do
    store_name_or_path
    |> Store.get_merged_index_from_store(password)
    |> SearchCLI.command_line(store: store_name_or_path, passwd: password)
  rescue
    _e in File.Error ->
      default = default_store()

      store =
        case store_name_or_path do
          ^default -> ""
          any -> any
        end

      IO.puts("""
      ** store `#{store_name_or_path}` is missing.
      first create it with: superls archive /path/to/myfiles -s #{store} [- p]
      """)
  end

  defp main_args(["help"], _store, _passwd) do
    path = Store.cache_path()

    IO.puts("""
    Usage: superls command [params] [-p -s my_store]
      -s specifies a store name, no -s defaults to store `default`
      -p requires to enter a password, no -p defaults to no password 
    Available commands are:
      archive:\n\t  superls archive /path/to/my/files\n\t  note: links prevent archiving, executes this before archiving: `find /path/to/my/files -type l -ls`
      search:\n\t  superls search
    Stores:
      #{Enum.intersperse(Store.list_stores(), ", ")}

    Cache information:
      cache_path: #{path}
    """)
  end

  defp main_args([], store_name, passwd),
    do: main_args(["help"], store_name, passwd)

  defp main_args(cmd, _store, _passwd) do
    throw(
      "** unknown command `#{Enum.intersperse(cmd, " ")}`\n" <>
        "type: `superls help` for available commands"
    )
  end
end