class ApplicationController < ActionController::Base
  include SeoConcern
  # Only allow modern browsers supporting webp images, web push, badges, import maps, CSS nesting, and CSS :has.
  before_action :log_browser_info
  before_action :set_content_type_for_rss, if: -> { request.format.rss? }
  # allow_browser versions: :modern
  # allow_browser versions: :modern,
  #               patterns: [
  #                 # 鸿蒙系统相关
  #                 /OpenHarmony/,           # 鸿蒙系统标识
  #                 /ArkWeb\/[\d.]+/,        # 鸿蒙浏览器内核
  #                 /Mobile HuaweiBrowser/,  # 华为浏览器（新格式）
  #                 /HuaweiBrowser\/[\d.]+/, # 华为浏览器（旧格式）
  #
  #                 # 夸克浏览器（更宽松的匹配）
  #                 /Quark[\s\/][\d.]+/,     # 匹配 "Quark/7.4.6.681" 或 "Quark 7.4.6.681"
  #
  #                 /Mobile Safari/,
  #                 /Chrome\/[\d.]+/,
  #                 /Quark\/[\d.]+/,
  #                 /HuaweiBrowser\/[\d.]+/,
  #                 /MiuiBrowser\/[\d.]+/,
  #                 /VivoBrowser\/[\d.]+/,
  #                 /OppoBrowser\/[\d.]+/,
  #                 /UCBrowser\/[\d.]+/,
  #                 /QQBrowser\/[\d.]+/,
  #                 /MicroMessenger\/[\d.]+/,
  #                 /Alipay/,
  #                 /BaiduBoxApp/,
  #                 /baiduboxapp/i,
  #                 /SogouMobile/,
  #                 /Weibo/,
  #                 /DingTalk/,
  #                 /ToutiaoMicroApp/,
  #                 /BytedanceWebview/,
  #                 /ArkWeb/
  #               ],
  #               on_failure: ->(browser) {
  #                 Rails.logger.warn <<~BROWSER_INFO
  #                   Browser Blocked:
  #                   User Agent: #{browser.ua}
  #                   Name: #{browser.name}
  #                   Version: #{browser.version}
  #                   Platform: #{browser.platform.name}
  #                   Device: #{browser.device.name}
  #                   Mobile: #{browser.mobile?}
  #                   Modern: #{browser.modern?}
  #                   Bot: #{browser.bot?}
  #                 BROWSER_INFO
  #               }
  around_action :set_locale
  after_action :track_action

  def log_browser_info
    # 构建详细的浏览器信息
    Rails.logger.debug "User Agent: #{request.user_agent}"

    # 如果是被拦截的浏览器，记录额外信息
    # unless browser_allowed?
    #   Rails.logger.info "User Agent: #{request.user_agent}"
    # end
  end

  protected

  def track_action
    ahoy.track "Viewed Application", request.path_parameters
  end

  def authenticate_admin_user!
    unless current_user&.admin?
      flash[:alert] = "您没有权限访问该页面。"
      redirect_to root_path
    end
  end

  private

  def set_locale(&action)
    I18n.locale = extract_locale || I18n.default_locale
    I18n.fallbacks[I18n.locale] = [ I18n.locale, I18n.default_locale ].uniq
    locale = params[:locale] || extract_locale_from_accept_language_header || I18n.default_locale
    I18n.with_locale(locale, &action)
    # 重定向到带有语言前缀的相同路径
    # redirect_to "/#{locale}#{request.fullpath}"
  end

  def extract_locale_from_accept_language_header
    return I18n.default_locale.to_s unless request.env["HTTP_ACCEPT_LANGUAGE"]

    available_locales = I18n.available_locales.map(&:to_s)

    accept_language = request.env["HTTP_ACCEPT_LANGUAGE"].to_s
    # 修改正则表达式以匹配 'zh-CN' 这样的格式
    if (full_locale = accept_language.scan(/^[a-z]{2}-[A-Z]{2}/).first)
      locale = full_locale
    else
      # 否则只匹配语言代码 (例如 'en')
      locale = accept_language.scan(/^[a-z]{2}/).first || I18n.default_locale.to_s
    end

    return locale if available_locales.include?(locale)

    # 尝试基础语言匹配（例如：当请求 'zh' 时匹配 'zh-CN'）
    base_language = locale.split("-").first
    matching_locale = available_locales.find do |available_locale|
      available_locale.start_with?(base_language)
    end
    matching_locale ? matching_locale : I18n.default_locale.to_s
  end

  def sanitize_locale(locale)
    # 直接使用 I18n.available_locales
    locale = locale.to_sym
    I18n.available_locales.include?(locale) ? locale : I18n.default_locale
  end

  def extract_locale
    parsed_locale = params[:locale]
    I18n.available_locales.map(&:to_s).include?(parsed_locale) ? parsed_locale : nil
  end

  def default_url_options
    { locale: I18n.locale }
  end

  def set_content_type_for_rss
    response.headers["Content-Type"] = "application/rss+xml; charset=utf-8"
  end
end