require 'tty-spinner'
require 'yaml'
require 'tty-table'
require 'zip'
require 'colorize'
require 'faastruby/cli/commands'
require 'faastruby/cli/package'
require 'faastruby/cli/template'
require 'erb'

module FaaStRuby
  FAASTRUBY_YAML = 'faastruby.yml'
  SPINNER_FORMAT = :spin_2
  SUPPORTED_RUNTIMES = ['ruby:2.5.3', 'ruby:2.6.0', 'ruby:2.6.1', 'crystal:0.27.0', 'crystal:0.27.1']
  class CLI
    def self.error(message, color: :red)
      message.each {|m| STDERR.puts m.colorize(color)} if message.is_a?(Array)
      STDERR.puts message.colorize(color) if message.is_a?(String)
      exit 1
    end

    def self.run(command, args)
      if command.nil?
        FaaStRuby::Command::Help.new(args).run
        return
      end
      start_server(args) if command == 'server'
      # check_version
      check_region
      error("Unknown command: #{command}") unless FaaStRuby::Command::COMMANDS.has_key?(command)
      FaaStRuby::Command::COMMANDS[command].new(args).run
    end

    # def self.check_version
    #   latest = RestClient.get('https://faastruby.io/gem/minimum.txt').body rescue '0.0.1'
    #   if Gem::Version.new(FaaStRuby::VERSION) < Gem::Version.new(latest)
    #     FaaStRuby.error([
    #       "You are using an old version of the gem. Please run 'gem update faastruby'.".red,
    #       "Installed version: #{FaaStRuby::VERSION}",
    #       "Latest version: #{latest}"
    #     ], color: nil)
    #   end
    # end

    def self.check_region
      ENV['FAASTRUBY_REGION'] ||= DEFAULT_REGION
      error(["No such region: #{ENV['FAASTRUBY_REGION']}".red, "Valid regions are:  #{FaaStRuby::REGIONS.join(' | ')}"], color: nil) unless FaaStRuby::REGIONS.include?(ENV['FAASTRUBY_REGION'])
    end

    def self.start_server(args)
      exec("faastruby-server #{args.join(' ')}")
    end
  end
end