# frozen_string_literal: true
require 'bundler/setup'
require 'time'

MAX_PK = 10_000
ID_RANGE = (1..MAX_PK).freeze
ALL_IDS = ID_RANGE.to_a
QUERIES_MIN = 1
QUERIES_MAX = 500
SEQUEL_NO_ASSOCIATIONS = true

SERVER_STRING =
  if defined?(PhusionPassenger)
    'passenger'
  elsif defined?(Puma)
    'puma'
  elsif defined?(Unicorn)
    'unicorn'
  elsif defined?(Agoo)
    'agoo'
  end

Bundler.require(:default) # Load core modules

def connect(dbtype)
  Bundler.require(dbtype) # Load database-specific modules

  adapters = {
    :mysql=>{ :jruby=>'jdbc:mysql', :mri=>'mysql2' },
    :postgresql=>{ :jruby=>'jdbc:postgresql', :mri=>'postgres' }
  }

  opts = {}

  # Determine threading/thread pool size and timeout
  if defined?(JRUBY_VERSION)
    opts[:max_connections] = (2 * Math.log(Integer(ENV.fetch('MAX_CONCURRENCY')))).floor
    opts[:pool_timeout] = 10
  elsif defined?(Puma) && (threads = Puma.cli_config.options.fetch(:max_threads)) > 1
    opts[:max_connections] = (2 * Math.log(threads)).floor
    opts[:pool_timeout] = 10
  else
    Sequel.single_threaded = true
  end

  Sequel.connect \
    '%{adapter}://%{host}/%{database}?user=%{user}&password=%{password}' % {
      :adapter=>adapters.fetch(dbtype).fetch(defined?(JRUBY_VERSION) ? :jruby : :mri),
      :host=>'tfb-database',
      :database=>'hello_world',
      :user=>'benchmarkdbuser',
      :password=>'benchmarkdbpass'
    }, opts
end

DB = connect ENV.fetch('DBTYPE').to_sym

# Define ORM models
class World < Sequel::Model(:World)
  def_column_alias(:randomnumber, :randomNumber) if DB.database_type == :mysql

  def self.batch_update(worlds)
    if DB.database_type == :mysql
      worlds.map(&:save_changes)
    else
      ids = []
      sql = String.new("UPDATE world SET randomnumber = CASE id ")
      worlds.each do |world|
        sql << "when #{world.id} then #{world.randomnumber} "
        ids << world.id
      end
      sql << "ELSE randomnumber END WHERE id IN ( #{ids.join(',')})"
      DB.run(sql)
    end
  end
end

class Fortune < Sequel::Model(:Fortune)
  # Allow setting id to zero (0) per benchmark requirements
  unrestrict_primary_key
end

[World, Fortune].each(&:freeze)
DB.freeze