defmodule ExSwiftParser.MixProject do
  use Mix.Project

  def project do
    [
      app: :ex_swift_parser,
      version: "0.1.2",
      elixir: "~> 1.15",
      start_permanent: Mix.env() == :prod,
      deps: deps(),
      compilers: Mix.compilers(),
      aliases: aliases(),
      escript: escript(),
      description: description(),
      package: package(),
      source_url: "https://github.com/dockyard/ex_swift_parser",
      docs: [
        main: "readme",
        extras: ["README.md"]
      ]
    ]
  end

  defp escript do
    [
      main_module: ExSwiftParser.CLI
    ]
  end

  # Run "mix help compile.app" to learn about applications.
  def application do
    [
      extra_applications: [:logger]
    ]
  end

  # Run "mix help deps" to learn about dependencies.
  defp deps do
    [
      {:jason, "~> 1.2"},
      {:ex_doc, "~> 0.29", only: :dev, runtime: false}
    ]
  end

  defp description do
    "Elixir wrapper for Swift AST parsing using swift-ast-explorer"
  end

  defp package do
    [
      maintainers: ["DockYard"],
      licenses: ["MIT"],
      links: %{"GitHub" => "https://github.com/dockyard/ex_swift_parser"},
      files: [
        "lib",
        "mix.exs",
        "README.md",
        "LICENSE",
        ".formatter.exs",
        "Makefile",
        "third_party/swift-ast-explorer/Resources/parsers/50800/Package.swift",
        "third_party/swift-ast-explorer/Resources/parsers/50800/Sources",
        "third_party/swift-ast-explorer/Resources/parsers/50900/Package.swift",
        "third_party/swift-ast-explorer/Resources/parsers/50900/Sources",
        "third_party/swift-ast-explorer/Resources/parsers/51000/Package.swift",
        "third_party/swift-ast-explorer/Resources/parsers/51000/Sources"
      ]
    ]
  end

  defp aliases do
    [
      "deps.get": ["deps.get", "compile.swift_parsers"],
      "compile": ["compile.swift_parsers", "compile"]
    ]
  end
end

defmodule Mix.Tasks.Compile.SwiftParsers do
  @moduledoc """
  Compiles Swift parsers for ExSwiftParser
  """
  use Mix.Task

  @shortdoc "Compile Swift parsers"
  @recursive true

  def run(_args) do
    Mix.shell().info("Compiling Swift parsers...")

    # Ensure priv/parsers directory exists
    File.mkdir_p!("priv/parsers")

    parsers = [
      {"50800", "parser_50800"},
      {"50900", "parser_50900"},
      {"51000", "parser_51000"}
    ]

    for {version, parser_name} <- parsers do
      parser_path = "third_party/swift-ast-explorer/Resources/parsers/#{version}"
      target_path = "priv/parsers/#{parser_name}"

      if File.exists?(parser_path) do
        Mix.shell().info("Building Swift parser for version #{version}...")

        case System.cmd("swift", ["build", "--package-path", parser_path],
                       stderr_to_stdout: true) do
          {output, 0} ->
            Mix.shell().info("Successfully built parser #{version}")

            # Create symlink to the built parser
            built_parser = Path.join([parser_path, ".build", "debug", "parser"])
            if File.exists?(built_parser) do
              # Remove existing symlink if it exists
              if File.exists?(target_path), do: File.rm!(target_path)

              # Create relative symlink
              relative_path = Path.relative_to(built_parser, "priv/parsers")
              File.ln_s!(relative_path, target_path)
            end

          {output, exit_code} ->
            Mix.shell().error("Failed to build parser #{version} (exit code: #{exit_code})")
            Mix.shell().error(output)
        end
      else
        Mix.shell().error("Parser source not found: #{parser_path}")
      end
    end

    :ok
  end
end