class Traefik < Formula
  desc "Modern reverse proxy"
  homepage "https://traefik.io/"
  url "https://github.com/containous/traefik/releases/download/v1.7.12/traefik-v1.7.12.src.tar.gz"
  version "1.7.12"
  sha256 "cc69fa2759c2d1ed0fcb41a83c988ff167703f399f6e83fca2dac520cd6fe35c"
  head "https://github.com/containous/traefik.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "3a13c6e7c59ed61b16925a14abf0a1683d53ca73500d9824ee3a9e3b132753c2" => :mojave
    sha256 "988f40a0f95c06acec675f610da3a5ebdd83edacf6e9d6fef7d83ad7cbfe44eb" => :high_sierra
    sha256 "200fb89bdc6124bfada0f68c6efde83c4c6528c219771844552d149df8d3fd83" => :sierra
  end

  depends_on "go" => :build
  depends_on "go-bindata" => :build
  depends_on "node" => :build
  depends_on "yarn" => :build

  def install
    ENV["GOPATH"] = buildpath
    (buildpath/"src/github.com/containous/traefik").install buildpath.children

    cd "src/github.com/containous/traefik" do
      cd "webui" do
        system "yarn", "upgrade"
        system "yarn", "install"
        system "yarn", "run", "build"
      end
      system "go", "generate"
      system "go", "build", "-o", bin/"traefik", "./cmd/traefik"
      prefix.install_metafiles
    end
  end

  plist_options :manual => "traefik"

  def plist
    <<~EOS
      <?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
      <plist version="1.0">
        <dict>
          <key>KeepAlive</key>
          <false/>
          <key>Label</key>
          <string>#{plist_name}</string>
          <key>ProgramArguments</key>
          <array>
            <string>#{opt_bin}/traefik</string>
            <string>--configfile=#{etc/"traefik/traefik.toml"}</string>
          </array>
          <key>EnvironmentVariables</key>
          <dict>
          </dict>
          <key>RunAtLoad</key>
          <true/>
          <key>WorkingDirectory</key>
          <string>#{var}</string>
          <key>StandardErrorPath</key>
          <string>#{var}/log/traefik.log</string>
          <key>StandardOutPath</key>
          <string>#{var}/log/traefik.log</string>
        </dict>
      </plist>
    EOS
  end

  test do
    require "socket"

    web_server = TCPServer.new(0)
    http_server = TCPServer.new(0)
    web_port = web_server.addr[1]
    http_port = http_server.addr[1]
    web_server.close
    http_server.close

    (testpath/"traefik.toml").write <<~EOS
      [web]
      address = ":#{web_port}"

      [entryPoints.http]
      address = ":#{http_port}"
    EOS

    begin
      pid = fork do
        exec bin/"traefik", "--configfile=#{testpath}/traefik.toml"
      end
      sleep 5
      cmd = "curl -sIm3 -XGET http://localhost:#{web_port}/dashboard/"
      assert_match /200 OK/m, shell_output(cmd)
    ensure
      Process.kill("HUP", pid)
    end
  end
end