defmodule Mix.Tasks.Npm.Install do
  @shortdoc "`npm install` in web_dir + npm install server side dependencies"
  def run(_args) do
    System.cmd("npm",["install"], into: IO.stream(:stdio, :line), cd: "web")
    System.cmd("npm",["install","#{:code.priv_dir(:reaxt)}/commonjs_reaxt"], into: IO.stream(:stdio, :line), cd: "web")
  end
end

defmodule Mix.Tasks.Webpack.Analyseapp do
  @shortdoc "Generate webpack stats analysing application, resulting priv/static is meant to be versionned"
  def run(_args) do
    File.rm_rf!("priv/static")
    {_,0} = System.cmd("git",["clone","-b","ajax-sse-loading","https://github.com/awetzel/analyse"], into: IO.stream(:stdio, :line))
    {_,0} = System.cmd("npm",["install"], into: IO.stream(:stdio, :line), cd: "analyse")
    {_,0} = System.cmd("grunt",[], into: IO.stream(:stdio, :line), cd: "analyse")
    File.cp_r!("analyse/dist", "priv/static")
    File.rm_rf!("analyse")
  end
end

defmodule Mix.Tasks.Webpack.Compile do
  @shortdoc "Compiles Webpack"
  @webpack "./node_modules/webpack/bin/webpack.js"
  def run(_) do
    {_res,0} = compile_server
    {json,0} = compile_client
    File.write!("priv/webpack.stats.json",json)
  end
  def compile_server() do
    server_config = "./node_modules/reaxt/server.webpack.config.js"
    System.cmd("node",[@webpack,"--config",server_config,"--colors"], into: IO.stream(:stdio, :line), cd: "web")
  end
  def compile_client() do
    client_config = "./node_modules/reaxt/client.webpack.config.js"
    System.cmd("node",[@webpack,"--config",client_config,"--json"], into: "", cd: "web")
  end
end

defmodule Mix.Tasks.Compile.Reaxt_webpack do
  def run(args) do
    if !File.exists?("web/node_modules") do
      Mix.Task.run("npm.install", args)
    else
      installed_version = Poison.decode!(File.read!("web/node_modules/reaxt/package.json"))["version"]
      current_version = Poison.decode!(File.read!("#{:code.priv_dir(:reaxt)}/commonjs_reaxt/package.json"))["version"]
      if  installed_version !== current_version, do:
        Mix.Task.run("npm.install", args)
    end

    if !Application.get_env(:reaxt,:hot), do:
      Mix.Task.run("webpack.compile", args)
  end
end