class LicenseFinder::Gradle

def build_file_from_settings(project_path)
  settings_gradle_path = project_path.join 'settings.gradle'
  return nil unless File.exist? settings_gradle_path
  settings_gradle = File.read settings_gradle_path
  match = /rootProject.buildFileName = ['"](?<build_file>.*)['"]/.match settings_gradle
  return nil unless match
  project_path.join match[:build_file]
end

def build_gradle_file
  kotlin_gradle_path = project_path.join('build.gradle.kts')
  return kotlin_gradle_path if File.exist? kotlin_gradle_path
  project_path.join('build.gradle')
end

def current_packages
  WithEnv.with_env('TERM' => 'dumb') do
    command = "#{@command} downloadLicenses"
    _stdout, stderr, status = Dir.chdir(project_path) { Cmd.run(command) }
    raise "Command '#{command}' failed to execute: #{stderr}" unless status.success?
    dependencies = GradleDependencyFinder.new(project_path).dependencies
    packages = dependencies.flat_map do |xml_file|
      options = { 'GroupTags' => { 'dependencies' => 'dependency' } }
      contents = XmlSimple.xml_in(xml_file, options).fetch('dependency', [])
      contents.map do |dep|
        GradlePackage.new(dep, logger: logger, include_groups: @include_groups)
      end
    end
    packages.uniq
  end
end

def detected_package_path
  alternate_build_file = build_file_from_settings(project_path)
  return alternate_build_file if alternate_build_file
  build_gradle_file
end

def initialize(options = {})
  super
  @command = options[:gradle_command] || package_management_command
  @include_groups = options[:gradle_include_groups]
end

def package_management_command
  if Platform.windows?
    wrapper = 'gradlew.bat'
    gradle = 'gradle.bat'
  else
    wrapper = './gradlew'
    gradle = 'gradle'
  end
  File.exist?(File.join(project_path, wrapper)) ? wrapper : gradle
end

def project_root?
  active? && root_module?
end

def root_module?
  return false if project_path.to_s.include?('buildSrc')
  command = "#{package_management_command} -Dorg.gradle.jvmargs=-Xmx6144m properties | grep 'parent: '"
  stdout, stderr, status = Dir.chdir(project_path) { Cmd.run(command) }
  if stderr&.include?('not part of the build defined by settings file')
    Dir.chdir(project_path) do
      Cmd.run('touch settings.gradle')
      stdout, stderr, status = Cmd.run(command)
      Cmd.run('rm settings.gradle')
    end
  end
  raise "Command '#{command}' failed to execute in #{project_path}: #{stderr}" unless status.success?
  root_project_name = stdout.gsub(/\s|parent:|\n/, '')
  root_project_name == 'null'
end