class SvelteOnRails::Lib::Utils

def self.asset_path(filename)
  config = SvelteOnRails::Configuration.instance
  path = (config.frontend_folder + config.components_folder).join(filename)
  manifest = config.ssr_manifest
  manifest[path.to_s.sub(/\.svelte$/, '') + '.svelte']['file']
end

def self.component_files(filename, base_path: SvelteOnRails::Configuration.instance.components_folder_full)
  fn = (filename.match(/\.svelte$/) ? filename[0..-8] : filename)
  svelte_file = (base_path + fn).to_s + '.svelte'
  svelte_filename = fn + '.svelte'
  cnf = SvelteOnRails::Configuration.instance
  cf = cnf.rails_root.join('public', 'vite-ssr', asset_path(filename).sub(/.js$/, ''))
  {
    svelte_file: svelte_file,
    svelte_filename: svelte_filename,
    compiled_file: cf.to_s
  }
end

def self.file_exist_case_sensitive?(containing_dir, filename)
  # Combine the directory path and filename
  full_path = File.join(containing_dir, filename)
  # Check if the file exists and the path matches case-sensitively
  File.exist?(full_path) && Dir[File.join(containing_dir, "**/*")].any? do |f|
    f == full_path
  end
end

def self.gem_app_dir
  File.expand_path('../../svelte_on_rails', __dir__) + '/'
end

def self.precompile(last_mtime = nil)
  config = SvelteOnRails::Configuration.instance
  Dir.chdir(config.rails_root) do
    cmd = "./node_modules/.bin/vite build --config vite-ssr.config.ts"
    puts `#{cmd}`
  end
  unless Dir.exist?(config.ssr_dist_folder)
    raise "Could not find dist folder: #{config.ssr_dist_folder}"
  end
  if last_mtime
    mtime_path = config.ssr_dist_folder.join('last_mtime')
    File.write(mtime_path, last_mtime.to_s)
  end
end

def self.watch_changes_and_precompile
  config = SvelteOnRails::Configuration.instance
  return unless config.watch_changes?
  mtime = Dir[File.join(config.components_folder_full, '**/*.svelte')].map do |file|
    File.mtime(file).to_f
  end.max || 0.0
  last = if Dir.exist?(config.ssr_dist_folder)
           mtime_path = config.ssr_dist_folder.join('last_mtime')
           (File.exist?(mtime_path) ? File.read(mtime_path).to_f : 0.0)
         end
  if !last || mtime > last
    precompile(mtime)
  end
end