#!/bin/env ruby

require 'colorize'
require 'net/http'
require 'uri'
require 'json'

current = `git rev-parse HEAD`.strip
latest = current
api_url = URI.parse 'https://lesbian.ddns.net/api/v1/repos/tomas/webdl/commits?limit=1'

puts '[Daemon] '.red + 'Running WebDL daemon'
while true do
    print '[Daemon] '.red + 'Starting server...'
    out_thread = nil
    IO.popen('npm start', 'w+') do |io|
        puts ' Ok!'.green

        out_thread = Thread.new do
            begin
                for line in io.each_line do
                    puts '[WebDL] '.blue + line
                end
            rescue
                # Pipe closed
            end
        end

        while true do
            sleep 600

            print '[Daemon] '.red + 'Checking for updates...'
            res = Net::HTTP.get_response api_url
            data = JSON.parse res.body
            latest = data[0]['sha']

            if current == latest then
                puts ' Already latest'
            else
                puts ' Update available!'.cyan
                puts '[Daemon] '.red + 'Signaled server to shutdown'
                io.puts 'shutdown'
                io.flush
                break
            end
        end
    end

    puts '[Daemon] '.red + 'Server closed'
    out_thread.join

    if not current == latest then
        puts '[Daemon] '.red + 'Updating...'
        ok = system 'git pull'
        if ok then
            current = `git rev-parse HEAD`.strip
        else
            puts '[Daemon] '.red + 'Update failed!'.yellow
        end
    end
end