class ViteRuby::DevServerProxy

def file_in_vite_root?(path)
  path.include?(".") && # Check for extension, avoid filesystem if possible.
    config.vite_root_dir.join(path.start_with?("/") ? path[1..] : path).file?
end

def forward_to_vite_dev_server(env)
  rewrite_uri_for_vite(env)
  env["QUERY_STRING"] ||= ""
  env["HTTP_HOST"] = env["HTTP_X_FORWARDED_HOST"] = config.host
  env["HTTP_X_FORWARDED_SERVER"] = config.host_with_port
  env["HTTP_PORT"] = env["HTTP_X_FORWARDED_PORT"] = config.port.to_s
  env["HTTP_X_FORWARDED_PROTO"] = env["HTTP_X_FORWARDED_SCHEME"] = config.protocol
  env["HTTPS"] = env["HTTP_X_FORWARDED_SSL"] = "off" unless config.https
  env["SCRIPT_NAME"] = ""
end

def initialize(app = nil, options = {})
  @vite_ruby = options.delete(:vite_ruby) || ViteRuby.instance
  options[:streaming] = false if config.mode == "test" && !options.key?(:streaming)
  super
end

def normalize_uri(uri)
  uri
    .sub(HOST_WITH_PORT_REGEX, "/") # Hanami adds the host and port.
    .sub(".ts.js", ".ts") # Hanami's javascript helper always adds the extension.
    .sub(/\.(sass|scss|styl|stylus|less|pcss|postcss)\.css$/, '.\1') # Rails' stylesheet_link_tag always adds the extension.
end

def perform_request(env)
  if vite_should_handle?(env) && dev_server_running?
    forward_to_vite_dev_server(env)
    super
  else
    @app.call(env)
  end
end

def rewrite_uri_for_vite(env)
  uri = env.fetch("REQUEST_URI") { [env["PATH_INFO"], env["QUERY_STRING"]].reject { |str| str.to_s.strip.empty? }.join("?") }
  env["PATH_INFO"], env["QUERY_STRING"] = (env["REQUEST_URI"] = normalize_uri(uri)).split("?")
end

def vite_should_handle?(env)
  path = normalize_uri(env["PATH_INFO"])
  return true if path.start_with?(vite_url_prefix) # Vite asset
  true if file_in_vite_root?(path) # Fallback if Vite can serve the file
end

def vite_url_prefix
  @vite_url_prefix ||= config.public_output_dir.empty? ? VITE_DEPENDENCY_PREFIX : "/#{config.public_output_dir}/"
end