# Copyright, 2019, by Samuel G. D. Williams. <http://www.codeotaku.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

require_relative 'console/logger'
require_relative 'console/terminal/logger'

module Console
	class << self
		attr_accessor :logger
		
		LEVELS = {
			'debug' => Logger::DEBUG,
			'info' => Logger::INFO,
		}
		
		# Set the default log level based on `$DEBUG` and `$VERBOSE`.
		# You can also specify CONSOLE_LOG_LEVEL=debug or CONSOLE_LOG_LEVEL=info in environment.
		def default_log_level(env = ENV)
			if level = env['CONSOLE_LOG_LEVEL']
				LEVELS[level] || Logger.warn
			elsif $DEBUG
				Logger::DEBUG
			elsif $VERBOSE
				Logger::INFO
			else
				Logger::WARN
			end
		end
	end
	
	# Create the logger instance:
	@logger = Logger.new(
		Terminal::Logger.new($stderr),
		level: self.default_log_level,
	)
	
	def logger= logger
		@logger = logger
	end
	
	def logger
		@logger || Console.logger
	end
	
	def self.extended(klass)
		klass.instance_variable_set(:@logger, nil)
	end
end