require 'ipaddr'

module JamRuby
  class JamIsp < ActiveRecord::Base

    self.table_name = 'jamisp'
    COMPANY_TABLE = 'jamcompany'
    GEOIPISP_TABLE = 'geoipisp'

    def self.ip_to_num(ip_addr)
      begin
        i = IPAddr.new(ip_addr)
        return i.to_i if i.ipv4?
        nil
      rescue IPAddr::InvalidAddressError
        nil
      end
    end

    def self.lookup(ipnum)
      JamIsp.select(:coid)
      .where('geom && ST_MakePoint(?, 0) AND ? BETWEEN beginip AND endip', ipnum, ipnum)
      .limit(1)
      .first
    end

    def self.createx(beginip, endip, coid)
      c = connection.raw_connection
      c.exec_params("insert into #{self.table_name} (beginip, endip, coid, geom) values($1::bigint, $2::bigint, $3, ST_MakeEnvelope($1::bigint, -1, $2::bigint, 1))",
        [beginip, endip, coid])
    end

    def self_delete()
      raise "mother trucker"
    end

    def self.delete_all()
      raise "mother trucker"
    end

    def self.import_from_max_mind(file)

      # File Geo-124
      # Format:
      # startIpNum,endIpNum,isp

      self.transaction do
        self.connection.execute "delete from #{GEOIPISP_TABLE}"
        File.open(file, 'r:ISO-8859-1') do |io|
          #s = io.gets.strip # eat the copyright line. gah, why do they have that in their file??
          #unless s.eql? 'Copyright (c) 2012 MaxMind LLC.  All Rights Reserved.'
          #  puts s
          #  puts 'Copyright (c) 2012 MaxMind LLC.  All Rights Reserved.'
          #  raise 'file does not start with expected copyright (line 1): Copyright (c) 2012 MaxMind LLC.  All Rights Reserved.'
          #end

          #s = io.gets.strip # eat the headers line
          #unless s.eql? 'locId,country,region,city,postalCode,latitude,longitude,metroCode,areaCode'
          #  puts s
          #  puts 'locId,country,region,city,postalCode,latitude,longitude,metroCode,areaCode'
          #  raise 'file does not start with expected header (line 2): locId,country,region,city,postalCode,latitude,longitude,metroCode,areaCode'
          #end

          saved_level = ActiveRecord::Base.logger ? ActiveRecord::Base.logger.level : 0
          count = 0

          stmt = "insert into #{GEOIPISP_TABLE} (beginip, endip, company) values"

          vals = ''
          sep = ''
          i = 0
          n = 20

          csv = ::CSV.new(io, {encoding: 'ISO-8859-1', headers: false})
          csv.each do |row|
            raise "file does not have expected number of columns (3): #{row.length}" unless row.length == 3

            beginip = MaxMindIsp.ip_address_to_int(MaxMindIsp.strip_quotes(row[0]))
            endip = MaxMindIsp.ip_address_to_int(MaxMindIsp.strip_quotes(row[1]))
            company = row[2]

            vals = vals+sep+"(#{beginip}, #{endip}, #{MaxMindIsp.quote_value(company)})"
            sep = ','
            i += 1

            if count == 0 or i >= n then
              GeoIpLocations.connection.execute stmt+vals
              count += i
              vals = ''
              sep = ''
              i = 0

              if ActiveRecord::Base.logger and ActiveRecord::Base.logger.level > 1 then
                ActiveRecord::Base.logger.debug "... logging inserts into #{GEOIPISP_TABLE} suspended ..."
                ActiveRecord::Base.logger.level = 1
              end

              if ActiveRecord::Base.logger and count%10000 < n then
                ActiveRecord::Base.logger.level = saved_level
                ActiveRecord::Base.logger.debug "... inserted #{count} into #{GEOIPISP_TABLE} ..."
                ActiveRecord::Base.logger.level = 1
              end
            end
          end

          if i > 0 then
            GeoIpLocations.connection.execute stmt+vals
            count += i
          end

          if ActiveRecord::Base.logger then
            ActiveRecord::Base.logger.level = saved_level
            ActiveRecord::Base.logger.debug "loaded #{count} records into #{GEOIPISP_TABLE}"
          end

          sts = GeoIpLocations.connection.execute "DELETE FROM #{COMPANY_TABLE};"
          ActiveRecord::Base.logger.debug "DELETE FROM #{COMPANY_TABLE} returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          sts.check

          sts = GeoIpLocations.connection.execute "ALTER SEQUENCE #{COMPANY_TABLE}_coid_seq RESTART WITH 1;"
          ActiveRecord::Base.logger.debug "ALTER SEQUENCE #{COMPANY_TABLE}_coid_seq returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          sts.check

          sts = GeoIpLocations.connection.execute "INSERT INTO #{COMPANY_TABLE} (company) SELECT DISTINCT company FROM #{GEOIPISP_TABLE} ORDER BY company;"
          ActiveRecord::Base.logger.debug "INSERT INTO #{COMPANY_TABLE} returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          sts.check

          sts = GeoIpLocations.connection.execute "DELETE FROM #{self.table_name};"
          ActiveRecord::Base.logger.debug "DELETE FROM #{self.table_name} returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          sts.check

          sts = GeoIpLocations.connection.execute "INSERT INTO #{self.table_name} (beginip, endip, coid) SELECT x.beginip, x.endip, y.coid FROM #{GEOIPISP_TABLE} x, #{COMPANY_TABLE} y WHERE x.company = y.company;"
          ActiveRecord::Base.logger.debug "INSERT INTO #{self.table_name} returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          sts.check

          sts = GeoIpLocations.connection.execute "ALTER TABLE #{self.table_name} DROP COLUMN geom;"
          ActiveRecord::Base.logger.debug "DROP COLUMN geom returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          #sts.check [we don't care]

          sts = GeoIpLocations.connection.execute "ALTER TABLE #{self.table_name} ADD COLUMN geom geometry(polygon);"
          ActiveRecord::Base.logger.debug "ADD COLUMN geom returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          sts.check

          sts = GeoIpLocations.connection.execute "UPDATE #{self.table_name} SET geom = ST_MakeEnvelope(beginip, -1, endip, 1);"
          ActiveRecord::Base.logger.debug "SET geom returned sts #{sts.cmd_tuples}" if ActiveRecord::Base.logger
          sts.check

          sts = GeoIpLocations.connection.execute "CREATE INDEX #{self.table_name}_geom_gix ON #{self.table_name} USING GIST (geom);"
          ActiveRecord::Base.logger.debug "CREATE INDEX #{self.table_name}_geom_gix returned sts #{sts.cmd_status}" if ActiveRecord::Base.logger
          sts.check
        end
      end
    end
  end
end