require "colorize"
require "yaml"

class Baguette::Context
	class_property verbosity = 1
end

class Baguette::Configuration
	class Base
		include YAML::Serializable

		# Check for provided file first,
		# then $XDG_CONFIG_HOME/<class>.yml,
		# then /etc/baguette/<class>.yml.
		def self.get(file : String?)
			filename = "/" + (self.name.downcase.gsub /baguette::configuration::/, "") + ".yml"
			directory = "/baguette"

			suffix = "#{directory}#{filename}"
			user_configuration   = (ENV["XDG_CONFIG_HOME"]? || "~/.config") + suffix
			system_configuration = "/etc#{suffix}"

			if ! file.nil? && ! File.exists? file.not_nil!
				Baguette::Log.warning "Provided configuration file does not exist: #{file}"
			end

			if ! file.nil? && File.exists? file.not_nil!
				Baguette::Log.info "Using configuration file: #{file}"
				self.from_yaml File.read(file.not_nil!)
			elsif File.exists? user_configuration
				Baguette::Log.info "Using user configuration: #{user_configuration}"
				self.from_yaml File.read(user_configuration)
			elsif File.exists? user_configuration
				Baguette::Log.info "Using system configuration: #{system_configuration}"
				self.from_yaml File.read(system_configuration)
			else
				Baguette::Log.warning "No configuration found"
				nil
			end
		end
	end
end

class Baguette::Log
	# FIXME: Use log files.
	# FIXME: def log(), that puts stuff as-is in the logs.

	def self.debug(text)
		return unless Baguette::Context.verbosity > 2
		STDERR.puts ":: #{text}".colorize(:cyan)
		STDERR.flush
	end
	def self.info(text)
		return unless Baguette::Context.verbosity > 1
		STDOUT
			.<<(":: ".colorize(:blue))
			.<<(text.colorize(:white))
			.<<("\n")
		STDOUT.flush
	end
	def self.title(text)
		return unless Baguette::Context.verbosity > 1
		STDOUT
			.<<("|> ".colorize(:blue).bright)
			.<<(text.colorize(:white).bright)
			.<<("\n")
		STDOUT.flush
	end
	def self.warning(text)
		return unless Baguette::Context.verbosity > 0
		STDERR.puts ":: #{text}".colorize(:yellow)
		STDERR.flush
	end
	def self.error(text)
		return unless Baguette::Context.verbosity > 0
		STDERR.puts "!! #{text}".colorize(:red)
		STDERR.flush
	end
end