class ViteRuby::DevServerProxy

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 perform_request(env)
  if vite_should_handle?(env) && dev_server_running?
    forward_to_vite_dev_server(env)
    super(env)
  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('?') }
    .sub(HOST_WITH_PORT_REGEX, '/') # Hanami adds the host and port.
    .sub('.ts.js', '.ts') # Hanami's javascript helper always adds the extension.
    .sub(/(\.\w+)\.css$/, '\1') # Rails' stylesheet_link_tag always adds the extension.
  env['PATH_INFO'], env['QUERY_STRING'] = (env['REQUEST_URI'] = uri).split('?')
end

def vite_asset_url_prefix
  @vite_asset_url_prefix ||= "/#{ config.public_output_dir }/"
end

def vite_should_handle?(env)
  path, query, referer = env['PATH_INFO'], env['QUERY_STRING'], env['HTTP_REFERER']
  return true if path.start_with?(vite_asset_url_prefix) # Vite asset
  return true if path.start_with?(VITE_DEPENDENCY_PREFIX) # Packages and imports
  return true if query&.start_with?('t=') # Hot Reload for a stylesheet
  return true if query&.start_with?('import&') # Hot Reload for an imported entrypoint
  return true if referer && URI.parse(referer).path.start_with?(vite_asset_url_prefix) # Entry imported from another entry.
end