# This file begins the loading sequence.
#
# Quick Overview:
# * Requires set, fastthread, support libs, and base
# * Sets the applications root and environment for compatibility with rails or merb
# * Checks for the database.yml and loads it if it exists
# * Sets up the database using the config from the yaml file or from the environment
# * 

# This line just let's us require anything in the +lib+ sub-folder
# without specifying a full path.
unless defined?(DM_PLUGINS_ROOT)
  $LOAD_PATH.unshift(File.dirname(__FILE__))

  DM_PLUGINS_ROOT = (File.dirname(__FILE__) + '/../plugins')
end

# Require the basics...
require 'rubygems'
require 'yaml'
require 'set'
require 'fastthread'
require 'data_mapper/support/blank'
require 'data_mapper/support/enumerable'
require 'data_mapper/support/symbol'
require 'data_mapper/support/string'
require 'data_mapper/support/silence'
require 'data_mapper/support/inflector'
require 'data_mapper/database'
require 'data_mapper/base'

# This block of code is for compatibility with Ruby On Rails' or Merb's database.yml
# file, allowing you to simply require the data_mapper.rb in your
# Rails application's environment.rb to configure the DataMapper.
unless defined?(DM_APP_ROOT)
  application_root, application_environment = *if defined?(MERB_ROOT)
    [MERB_ROOT, MERB_ENV]
  elsif defined?(RAILS_ROOT)
    [RAILS_ROOT, RAILS_ENV]
  end
  
  DM_APP_ROOT = application_root || Dir::pwd
  
  if application_root && File.exists?(application_root + '/config/database.yml')

    database_configurations = YAML::load_file(application_root + '/config/database.yml')
    current_database_config = database_configurations[application_environment] || database_configurations[application_environment.to_sym]
    
    config = lambda { |key| current_database_config[key.to_s] || current_database_config[key] }
    
    default_database_config = {
      :adapter  => config[:adapter],
      :host     => config[:host],
      :database => config[:database],
      :username => config[:username],
      :password => config[:password]
    }
  
    DataMapper::Database.setup(default_database_config)
    
  elsif application_root && FileTest.directory?(application_root + '/config')
    
    %w(development testing production).map do |environment|
      <<-EOS.margin
        #{environment}:
          adapter: mysql
          username: root
          password:
          host: localhost
          database: #{File.dirname(DM_APP_ROOT).split('/').last}_#{environment}
      EOS
    end
    
    #File::open(application_root + '/config/database.yml')
  end
end