defmodule Ejabberd.MixProject do
  use Mix.Project

  def project do
    [app: :ejabberd,
     version: version(),
     description: description(),
     elixir: "~> 1.4",
     elixirc_paths: ["lib"],
     compile_path: ".",
     compilers: [:asn1] ++ Mix.compilers,
     erlc_options: erlc_options(),
     erlc_paths: ["asn1", "src"],
     # Elixir tests are starting the part of ejabberd they need
     aliases: [test: "test --no-start"],
     start_permanent: Mix.env() == :prod,
     language: :erlang,
     releases: releases(),
     package: package(),
     deps: deps()]
  end

  def version do
    case config(:vsn) do
      :false -> "0.0.0" # ./configure wasn't run: vars.config not created
      '0.0' -> "0.0.0" # the full git repository wasn't downloaded
      [_, _, ?., _, _] = x ->
        head = String.replace(:erlang.list_to_binary(x), ~r/0+([0-9])/, "\\1")
        <<head::binary, ".0">>
      vsn -> String.replace(:erlang.list_to_binary(vsn), ~r/0+([0-9])/, "\\1")
    end
  end

  def description do
    """
    Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)
    """
  end

  def application do
    [mod: {:ejabberd_app, []},
     extra_applications: [:mix],
     applications: [:idna, :inets, :kernel, :sasl, :ssl, :stdlib,
                    :base64url, :fast_tls, :fast_xml, :fast_yaml, :jiffy, :jose,
                    :p1_utils, :stringprep, :stun, :yconf],
     included_applications: [:lager, :mnesia, :os_mon,
                             :cache_tab, :eimp, :esip, :mqtree, :p1_acme,
                             :p1_oauth2, :pkix, :xmpp]
     ++ cond_apps()]
  end

  defp if_function_exported(mod, fun, arity, okResult) do
    :code.ensure_loaded(mod)
    if :erlang.function_exported(mod, fun, arity) do
      okResult
    else
      []
    end
  end

  defp if_version_above(ver, okResult) do
    if :erlang.system_info(:otp_release) > ver do
      okResult
    else
      []
    end
  end

  defp if_version_below(ver, okResult) do
    if :erlang.system_info(:otp_release) < ver do
      okResult
    else
      []
    end
  end

  defp erlc_options do
    # Use our own includes + includes from all dependencies
    includes = ["include"] ++ deps_include(["fast_xml", "xmpp", "p1_utils"])
    result = [:debug_info, {:d, :ELIXIR_ENABLED}] ++
             cond_options() ++
             Enum.map(includes, fn (path) -> {:i, path} end) ++
             if_version_above('20', [{:d, :DEPRECATED_GET_STACKTRACE}]) ++
             if_version_below('21', [{:d, :USE_OLD_HTTP_URI}]) ++
             if_version_below('22', [{:d, :LAGER}]) ++
             if_version_below('23', [{:d, :USE_OLD_CRYPTO_HMAC}]) ++
             if_version_below('23', [{:d, :USE_OLD_PG2}]) ++
             if_version_below('24', [{:d, :COMPILER_REPORTS_ONLY_LINES}]) ++
             if_version_below('24', [{:d, :SYSTOOLS_APP_DEF_WITHOUT_OPTIONAL}]) ++
             if_function_exported(:erl_error, :format_exception, 6, [{:d, :HAVE_ERL_ERROR}])
    defines = for {:d, value} <- result, do: {:d, value}
    result ++ [{:d, :ALL_DEFS, defines}]
  end

  defp cond_options do
    for {:true, option} <- [{config(:sip), {:d, :SIP}},
                            {config(:stun), {:d, :STUN}},
                            {config(:roster_gateway_workaround), {:d, :ROSTER_GATWAY_WORKAROUND}},
                            {config(:new_sql_schema), {:d, :NEW_SQL_SCHEMA}}
                           ], do:
    option
  end

  defp deps do
    [{:base64url, "~> 0.0.1"},
     {:cache_tab, "~> 1.0"},
     {:distillery, "~> 2.0"},
     {:eimp, "~> 1.0"},
     {:esip, "~> 1.0"},
     {:ex_doc, ">= 0.0.0", only: :dev},
     {:fast_tls, "~> 1.1"},
     {:fast_xml, "~> 1.1"},
     {:fast_yaml, "~> 1.0"},
     {:idna, "~> 6.0"},
     {:jiffy, "~> 1.0.5"},
     {:jose, "~> 1.8"},
     {:lager, "~> 3.9.1"},
     {:mqtree, "~> 1.0"},
     {:p1_acme, "~> 1.0"},
     {:p1_mysql, "~> 1.0"},
     {:p1_oauth2, "~> 0.6"},
     {:p1_pgsql, "~> 1.1"},
     {:p1_utils, "~> 1.0"},
     {:pkix, "~> 1.0"},
     {:stringprep, ">= 1.0.26"},
     {:stun, "~> 1.0"},
     {:xmpp, "~> 1.5"},
     {:yconf, "~> 1.0"}]
    ++ cond_deps()
  end

  defp deps_include(deps) do
    base = if Mix.Project.umbrella?() do
      "../../deps"
    else
      case Mix.Project.deps_paths()[:ejabberd] do
        nil -> "deps"
        _ -> ".."
      end
    end
    Enum.map(deps, fn dep -> base<>"/#{dep}/include" end)
  end

  defp cond_deps do
    for {:true, dep} <- [{config(:pam), {:epam, "~> 1.0"}},
                         {config(:redis), {:eredis, "~> 1.2.0"}},
                         {config(:zlib), {:ezlib, "~> 1.0"}},
                         {config(:lua), {:luerl, "~> 0.3.1"}},
                         {config(:sqlite), {:sqlite3, "~> 1.1"}}], do:
      dep
  end

  defp cond_apps do
    for {:true, app} <- [{config(:redis), :eredis},
                         {config(:mysql), :p1_mysql},
                         {config(:odbc), :odbc},
                         {config(:pgsql), :p1_pgsql},
                         {config(:sqlite), :sqlite3}], do:
      app
  end

  defp package do
    [# These are the default files included in the package
      files: ["include", "lib", "priv", "sql", "src",
              "COPYING", "README.md",
              "mix.exs", "rebar.config", "rebar.config.script", "vars.config"],
      maintainers: ["ProcessOne"],
      licenses: ["GPLv2"],
      links: %{"Site" => "https://www.ejabberd.im",
               "Documentation" => "http://docs.ejabberd.im",
               "Source" => "https://github.com/processone/ejabberd",
               "ProcessOne" => "http://www.process-one.net/"}]
  end

  defp vars do
    case :file.consult("vars.config") do
      {:ok,config} -> config
      _ -> [zlib: true]
    end
  end

  defp config(key) do
    case vars()[key] do
      nil -> false
      value -> value
    end
  end

  defp releases do
    maybe_tar = case Mix.env() do
      :prod -> [:tar]
      _ -> []
    end
    [
      ejabberd: [
        include_executables_for: [:unix],
        # applications: [runtime_tools: :permanent]
        steps: [&copy_extra_files/1, :assemble | maybe_tar]
      ]
    ]
  end

  defp copy_extra_files(release) do
    assigns = [
      version: version(),
      rootdir: config(:rootdir),
      installuser: config(:installuser),
      libdir: config(:libdir),
      sysconfdir: config(:sysconfdir),
      localstatedir: config(:localstatedir),
      docdir: config(:docdir),
      erl: config(:erl),
      epmd: config(:epmd),
      bindir: Path.join([config(:release_dir), "releases", version()]),
      release_dir: config(:release_dir),
      erts_vsn: "erts-#{release.erts_version}"
    ]
    ro = "rel/overlays"
    File.rm_rf(ro)

    # Elixir lower than 1.12.0 don't have System.shell
    execute = fn(command) ->
      case function_exported?(System, :shell, 1) do
        true ->
          System.shell(command)
        false ->
          :os.cmd(to_charlist(command))
      end
    end

    # Mix/Elixir lower than 1.11.0 use config/releases.exs instead of runtime.exs
    case Version.match?(System.version, ">= 1.11.0") do
      true ->
        :ok
      false ->
        execute.("cp config/runtime.exs config/releases.exs")
    end

    execute.("sed -e 's|{{\\(\[_a-z\]*\\)}}|<%= @\\1 %>|g' ejabberdctl.template > ejabberdctl.example1")
    Mix.Generator.copy_template("ejabberdctl.example1", "ejabberdctl.example2", assigns)
    execute.("sed -e 's|{{\\(\[_a-z\]*\\)}}|<%= @\\1 %>|g' ejabberdctl.example2 > ejabberdctl.example3")
    execute.("sed -e 's|ERLANG_NODE=ejabberd@localhost|ERLANG_NODE=ejabberd|g' ejabberdctl.example3 > ejabberdctl.example4")
    execute.("sed -e 's|INSTALLUSER=|ERL_OPTIONS=\"-setcookie \\$\\(cat \"\\${SCRIPT_DIR%/*}/releases/COOKIE\")\"\\nINSTALLUSER=|g' ejabberdctl.example4 > ejabberdctl.example5")
    Mix.Generator.copy_template("ejabberdctl.example5", "#{ro}/bin/ejabberdctl", assigns)
    File.chmod("#{ro}/bin/ejabberdctl", 0o755)

    File.rm("ejabberdctl.example1")
    File.rm("ejabberdctl.example2")
    File.rm("ejabberdctl.example3")
    File.rm("ejabberdctl.example4")
    File.rm("ejabberdctl.example5")

    suffix = case Mix.env() do
      :dev ->
        Mix.Generator.copy_file("test/ejabberd_SUITE_data/ca.pem", "#{ro}/etc/ejabberd/ca.pem")
        Mix.Generator.copy_file("test/ejabberd_SUITE_data/cert.pem", "#{ro}/etc/ejabberd/cert.pem")
        ".example"
      _ -> ""
    end

    Mix.Generator.copy_file("ejabberd.yml.example", "#{ro}/etc/ejabberd/ejabberd.yml#{suffix}")
    Mix.Generator.copy_file("ejabberdctl.cfg.example", "#{ro}/etc/ejabberd/ejabberdctl.cfg#{suffix}")
    Mix.Generator.copy_file("inetrc", "#{ro}/etc/ejabberd/inetrc")
    Mix.Generator.copy_template("rel/vm.args.mix", "#{ro}/etc/ejabberd/vm.args", assigns)

    Enum.each(File.ls!("sql"),
      fn x ->
        Mix.Generator.copy_file("sql/#{x}", "#{ro}/lib/ejabberd-#{release.version}/priv/sql/#{x}")
      end)

    Mix.Generator.create_directory("#{ro}/var/lib/ejabberd")

    case Mix.env() do
      :dev -> execute.("REL_DIR_TEMP=$PWD/rel/overlays/ rel/setup-dev.sh")
      _ -> :ok
    end

    release
  end

end

defmodule Mix.Tasks.Compile.Asn1 do
  use Mix.Task
  alias Mix.Compilers.Erlang

  @recursive true
  @manifest ".compile.asn1"

  def run(args) do
    {opts, _, _} = OptionParser.parse(args, switches: [force: :boolean])

    project      = Mix.Project.config
    source_paths = project[:asn1_paths] || ["asn1"]
    dest_paths    = project[:asn1_target] || ["src"]
    mappings     = Enum.zip(source_paths, dest_paths)
    options      = project[:asn1_options] || []

    force = case opts[:force] do
        :true -> [force: true]
        _ -> [force: false]
    end

    Erlang.compile(manifest(), mappings, :asn1, :erl, force, fn
      input, output ->
        options = options ++ [:noobj, outdir: Erlang.to_erl_file(Path.dirname(output))]
        case :asn1ct.compile(Erlang.to_erl_file(input), options) do
          :ok -> {:ok, :done}
          error -> error
        end
    end)
  end

  def manifests, do: [manifest()]
  defp manifest, do: Path.join(Mix.Project.manifest_path, @manifest)

  def clean, do: Erlang.clean(manifest())
end