class Tracepoint < ActiveRecord::Base
  set_table_name 'gps_points'

  validates_numericality_of :trackid, :only_integer => true
  validates_numericality_of :latitude, :only_integer => true
  validates_numericality_of :longitude, :only_integer => true
  validates_associated :trace
  validates_presence_of :timestamp

  belongs_to :trace, :foreign_key => 'gpx_id'
 
  before_save :update_tile

  def self.find_by_area(minlat, minlon, maxlat, maxlon, options)
    self.with_scope(:find => {:conditions => OSM.sql_for_area(minlat, minlon, maxlat, maxlon)}) do
      return self.find(:all, options)
    end
  end

  def update_tile
    self.tile = QuadTile.tile_for_point(lat, lon)
  end

  def lat=(l)
    self.latitude = (l * 10000000).round
  end

  def lng=(l)
    self.longitude = (l * 10000000).round
  end

  def lat
    return self.latitude.to_f / 10000000
  end

  def lon
    return self.longitude.to_f / 10000000
  end

  def to_xml_node
    el1 = XML::Node.new 'trkpt'
    el1['lat'] = self.lat.to_s
    el1['lon'] = self.lon.to_s
    return el1
  end
end