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# Load the appropriate libraries, or set a class indicating they aren't available

require 'facter'
require 'puppet'

module Puppet::Rails
    TIME_DEBUG = true

    def self.connect
        # This global init does not work for testing, because we remove
        # the state dir on every test.
        return if ActiveRecord::Base.connected?

        Puppet.settings.use(:main, :rails, :master)

        ActiveRecord::Base.logger = Logger.new(Puppet[:railslog])
        begin
            loglevel = Logger.const_get(Puppet[:rails_loglevel].upcase)
            ActiveRecord::Base.logger.level = loglevel
        rescue => detail
            Puppet.warning "'#{Puppet[:rails_loglevel]}' is not a valid Rails log level; using debug"
            ActiveRecord::Base.logger.level = Logger::DEBUG
        end

        if (::ActiveRecord::VERSION::MAJOR == 2 and ::ActiveRecord::VERSION::MINOR <= 1)
            ActiveRecord::Base.allow_concurrency = true
        end

        ActiveRecord::Base.verify_active_connections!

        begin
            args = database_arguments
            Puppet.info "Connecting to #{args[:adapter]} database: #{args[:database]}"
            ActiveRecord::Base.establish_connection(args)
        rescue => detail
            puts detail.backtrace if Puppet[:trace]
            raise Puppet::Error, "Could not connect to database: #{detail}"
        end
    end

    # The arguments for initializing the database connection.
    def self.database_arguments
        adapter = Puppet[:dbadapter]

        args = {:adapter => adapter, :log_level => Puppet[:rails_loglevel]}

        case adapter
        when "sqlite3"
            args[:database] = Puppet[:dblocation]
        when "mysql", "postgresql"
            args[:host]     = Puppet[:dbserver] unless Puppet[:dbserver].to_s.empty?
            args[:port]     = Puppet[:dbport] unless Puppet[:dbport].to_s.empty?
            args[:username] = Puppet[:dbuser] unless Puppet[:dbuser].to_s.empty?
            args[:password] = Puppet[:dbpassword] unless Puppet[:dbpassword].to_s.empty?
            args[:database] = Puppet[:dbname]
            args[:reconnect]= true

            socket          = Puppet[:dbsocket]
            args[:socket]   = socket unless socket.to_s.empty?

            connections     = Puppet[:dbconnections].to_i
            args[:pool]     = connections if connections > 0
        when "oracle_enhanced":
            args[:database] = Puppet[:dbname] unless Puppet[:dbname].to_s.empty?
            args[:username] = Puppet[:dbuser] unless Puppet[:dbuser].to_s.empty?
            args[:password] = Puppet[:dbpassword] unless Puppet[:dbpassword].to_s.empty?

            connections     = Puppet[:dbconnections].to_i
            args[:pool]     = connections if connections > 0
        else
            raise ArgumentError, "Invalid db adapter #{adapter}"
        end
        args
    end

    # Set up our database connection.  It'd be nice to have a "use" system
    # that could make callbacks.
    def self.init
        raise Puppet::DevError, "No activerecord, cannot init Puppet::Rails" unless Puppet.features.rails?

        connect()

        unless ActiveRecord::Base.connection.tables.include?("resources")
            require 'puppet/rails/database/schema'
            Puppet::Rails::Schema.init
        end

        migrate() if Puppet[:dbmigrate]
    end

    # Migrate to the latest db schema.
    def self.migrate
        dbdir = nil
        $LOAD_PATH.each { |d|
            tmp = File.join(d, "puppet/rails/database")
            if FileTest.directory?(tmp)
                dbdir = tmp
                break
            end
        }

        raise Puppet::Error, "Could not find Puppet::Rails database dir" unless dbdir

        raise Puppet::Error, "Database has problems, can't migrate." unless ActiveRecord::Base.connection.tables.include?("resources")

        Puppet.notice "Migrating"

        begin
            ActiveRecord::Migrator.migrate(dbdir)
        rescue => detail
            puts detail.backtrace if Puppet[:trace]
            raise Puppet::Error, "Could not migrate database: #{detail}"
        end
    end

    # Tear down the database.  Mostly only used during testing.
    def self.teardown
        raise Puppet::DevError, "No activerecord, cannot init Puppet::Rails" unless Puppet.features.rails?

        Puppet.settings.use(:master, :rails)

        begin
            ActiveRecord::Base.establish_connection(database_arguments())
        rescue => detail
            puts detail.backtrace if Puppet[:trace]
            raise Puppet::Error, "Could not connect to database: #{detail}"
        end

        ActiveRecord::Base.connection.tables.each do |t|
            ActiveRecord::Base.connection.drop_table t
        end
    end
end

require 'puppet/rails/host' if Puppet.features.rails?