module Browser

# Representation of the navigator application.
#
# @see https://developer.mozilla.org/en-US/docs/Web/API/Navigator
class Navigator
  include Browser::NativeCachedWrapper

  Version = Struct.new(:major, :minor, :build)
  Product = Struct.new(:name, :version)
  Vendor  = Struct.new(:name, :version)

  # Representation of a MIME type.
  class MimeType
    include Browser::NativeCachedWrapper

    # @!attribute [r] plugin
    # @return [Plugin] the plugin for the MIME type
    def plugin
      Plugin.new(`#@native.enabledPlugin`)
    end

    # @!attribute [r] description
    # @return [String] the description for the MIME type
    alias_native :description

    # @!attribute [r] extensions
    # @return [Array<String>] the extensions for this MIME type
    def extensions
      `#@native.suffixes`.split(/\s*/)
    end

    # @!attribute [r] type
    # @return [String] the MIME type
    alias_native :type
  end

  # Representation of a navigator plugin.
  #
  # @see https://developer.mozilla.org/en-US/docs/Web/API/Plugin
  class Plugin < Native::Array
    def initialize(plugin)
      super plugin do |m|
        MimeType.new(m)
      end
    end

    # @!attribute [r] description
    # @return [String] the plugin description
    alias_native :description

    # @!attribute [r] file
    # @return [String] the file associated with the plugin
    alias_native :file, :filename

    # @!attribute [r] name
    # @return [String] the plugin name
    alias_native :name

    # @!attribute [r] version
    # @return [String] the plugin version
    alias_native :version
  end

  # Representation for the array of plugins.
  #
  # @see https://developer.mozilla.org/en-US/docs/Web/API/NavigatorPlugins
  class Plugins < Native::Array
    def initialize(plugins)
      super plugins do |p|
        Plugin.new(p)
      end
    end

    # Reload all browser plugins.
    def refresh
      `#@native.refresh(false)`
    end

    # Reload all browser plugins reloading pages that contain `<embed>`s.
    def refresh!
      `#@native.refresh(true)`
    end
  end

  # @!attribute [r] code
  # @return [String] the browser code name
  alias_native :code, :appCodeName

  # @!attribute [r] name
  # @return [String] the browser name
  alias_native :name, :appName

  # @!attribute [r] version
  # @return [Version] the browser version
  def version
    Version.new(`#@native.appVersion`, `#@native.appMinorVersion`, `#@native.buildID`)
  end

  # Check if cookies are enabled.
  alias_native :cookies?, :cookieEnabled

  # Check if DNT is disabled.
  def track?
    `!#@native.doNotTrack`
  end

  # @!attribute [r] language
  # @return [String] the browser language
  alias_native :language

  # @!attribute [r] mime_types
  # @return [Native::Array<MimeType>] the supported MIME types
  def mime_types
    Native::Array.new `#@native.mimeTypes`, get: :item, named: :namedItem do |m|
      MimeType.new(m)
    end
  end

  # Check if the browser is in offline mode.
  def offline?
    `!#@native.onLine`
  end

  # @!attribute [r] operating_system
  # @return [String] the operating system the browser is running on
  alias_native :operating_system, :oscpu

  alias os operating_system

  # @!attribute [r] platform
  # @return [String] the platform the browser is running on
  alias_native :platform

  # @!attribute [r] plugins
  # @return [Plugins] the enabled plugins
  def plugins
    Plugins.new(`#@native.plugins`)
  end

  # @!attribute [r] product
  # @return [Product] the product name and version
  def product
    Product.new(`#@native.product`, `#@native.productSub`)
  end

  # @!attribute [r] user_agent
  # @return [String] the browser's user agent
  alias_native :user_agent, :userAgent

  # @!attribute [r] vendor
  # @return [Vendor] the vendor name and version
  def vendor
    Vendor.new(`#@native.vendor`, `#@native.vendorSub`)
  end

  # Check if Java is enabled.
  def java?
    `#@native.javaEnabled()`
  rescue
    false
  end

  # Representation of user location based on Geolocation API
  #
  # Example usage:
  # ```
  # $window.navigator.geolocate.then do |pos|
  #   puts "#{pos.coords.latitude}, #{pos.coords.longitude}, #{pos.coords.accuracy}"
  # end
  # ```
  #
  # @see https://developer.mozilla.org/en-US/docs/Web/API/Position
  class Position
    include Browser::NativeCachedWrapper

    class Coords
      include Native::Wrapper

      # @!attribute [r] latitude
      alias_native :latitude
      # @!attribute [r] longitude
      alias_native :longitude
      # @!attribute [r] altitude
      alias_native :altitude
      # @!attribute [r] accuracy
      alias_native :accuracy
      # @!attribute [r] altitude_accuracy
      alias_native :altitude_accuracy, :altitudeAccuracy
      # @!attribute [r] heading
      alias_native :heading
      # @!attribute [r] speed
      alias_native :speed
    end

    # @!attribute [r] timestamp
    alias_native :timestamp

    def coords
      @coords ||= Coords.new(`#@native.coords`)
    end
  end

  # Geolocates the user once
  #
  # @return [Promise] promise that resolves to the {Position} object
  def geolocate(max_age: 0, timeout: Float::INFINITY, high_accuracy: false)
    promise = Promise.new
    succ = proc { |i| promise.resolve(Position.new(i)) }
    fail = proc { |i| promise.reject(Native(i)) }
    opts = {maxAge: max_age, timeout: timeout, enableHighAccuracy: high_accuracy}
    `#@native.geolocation.getCurrentPosition(#{succ.to_n}, #{fail.to_n}, #{opts.to_n})`
    promise
  end

  # Geolocates the user multiple times and calls a block with his location
  # until #stop_tracking is called with a returned id. Calls a proc named error
  # if error happens.
  #
  # @return [Integer] an ID that can be used as an argument to #stop_tracking
  def track(max_age: 0, timeout: Float::INFINITY, high_accuracy: false, error: proc{|i|}, &block)
    opts = {maxAge: max_age, timeout: timeout, enableHighAccuracy: high_accuracy}
    succ = proc { |i| block.call(Position.new(i)) }
    fail = proc { |i| error.call(Native(i)) }
    `#@native.geolocation.watchPosition(#{succ.to_n}, #{fail.to_n}, #{opts.to_n})`
  end

  def stop_tracking(id)
    `#@native.geolocation.clearWatch(#{id})`
  end

  # Triggers a vibration on a device. A pattern can be either a number of
  # miliseconds for a vibration length, or an array of lengths (in
  # miliseconds) which describes a vibration pattern - first element of said
  # array describes how long the device should vibrate, second - how long to
  # stop for and so on.
  def vibrate(pattern)
    `#@native.vibrate(#{pattern.to_n})`
  end

  # Check a battery status of user device. This API is deprecated in the browser
  # context and usable mainly in privileged contexts.
  #
  # @return [Promise] a promise that resolves with a battery status
  #
  # @see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/getBattery
  def get_battery
    promise = Promise.new
    yes = proc { |r| promise.resolve(Native(r)) }
    no = proc { |r| promise.reject(Native(r)) }
    `#@native.getBattery().then(#{yes.to_n}).catch(#{no.to_n})`
    promise
  end

  # Queue to send a small amount of data to a server.
  #
  # @param url [String] url to trigger
  # @param payload [String, Blob, FormData, Hash] data to send
  #
  # @see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/sendBeacon
  def send_beacon(url, payload=nil)
    `#@native.sendBeacon(#{url}, #{payload.to_n})`
  end
end

class Window
  # @!attribute [r] navigator
  # @return [Navigator] the navigator
  def navigator
    @navigator ||= Navigator.new(`#@native.navigator`) if `#@native.navigator`
  end
end

end