#!/usr/bin/env ruby

require 'yaml'
require 'erb'

$queue = Queue.new
$panel_data = Hash.new("")
$children = []

class ModBasic
	def mainloop()
		thread = Thread.new {
			self.data_loop()
		}

		return thread
	end

	def data_loop()
		while true do
			t = Time.new
			$panel_data[:dummy] = "#{t}: I am a dummy!"
			$queue << 1
			sleep(1)
		end
	end
end

class ::String
	def erb
		return ERB.new(self).result
	end
end

def get_x_dims
	return `xrandr`.scan(/current (\d+) x (\d+)/).flatten
end

at_exit do
	$children.each do |pid|
		puts "Killing pid: #{pid}"
		Process.kill("TERM", pid)
	end
end

if ENV["XDG_CONFIG_HOME"] == nil
	conf_dir = ENV["HOME"] + "/.config/moltenbar"
else
	conf_dir = ENV["XDG_CONFIG_HOME"] + "/moltenbar"
end

config_file = conf_dir + "/rc.yaml"
mod_dir = conf_dir + "/mod"

$config = YAML.load_file(config_file)

Dir["#{mod_dir}/*"].each do |file|
	load file
end

if $config['geometry'] == nil
	$config['gap'] ||= 0
	$config['height'] ||= 14
	
	gap = $config['gap'].to_i

	if $config['width'] == nil
		y, x = get_x_dims()
		$config['width'] = y.to_i - (gap * 2)
	end

	$config['geometry'] = "#{$config['width']}x#{$config['height']}+#{gap}+#{gap}"
end

lemonbar_cmd = [
	"lemonbar",
	"-g", $config['geometry'],
	"-f", $config['fontspec'],
	"-n", $config['window_name'],
	"-a", $config['active_areas'],
	"-F", $config['colours']['fg'],
	"-B", $config['colours']['bg']
]

puts "Launching lemonbar as: " + lemonbar_cmd.join(" ")

trap("SIGINT") { exit 0 }
trap("SIGUSR1") { $queue << 1 }

IO.popen(lemonbar_cmd, "w") do |pipe|
	while true do
		data = $queue.pop
		pipe.puts $config['format'].erb
	end
end