#!/usr/bin/env ruby
require 'thor'
require_relative '../lib/convection/control/cloud'

module Convection
  ##
  # Convection CLI
  ##
  class CLI < Thor
    class_option :cloudfile, :type => :string, :default => 'Cloudfile'
    def initialize(*args)
      super
      @cloud = Control::Cloud.new
      @cwd = Dir.getwd
    end

    desc 'converge STACK', 'Converge your cloud'
    option :stack_group, :type => :string, :desc => 'The name of a stack group defined in your cloudfile to converge'
    option :stacks, :type => :array, :desc => 'A ordered space separated list of stacks to converge'
    def converge(stack = nil)
      @cloud.configure(File.absolute_path(options['cloudfile'], @cwd))
      @cloud.converge(stack, stack_group: options[:stack_group], stacks: options[:stacks]) do |event, errors|
        say_status(*event.to_thor)
        errors.each do |error|
          say "* #{ error.message }"
          error.backtrace.each { |b| say "    #{ b }" }
        end unless errors.nil?
      end
    end

    desc 'diff STACK', 'Show changes that will be applied by converge'
    option :verbose, :type => :boolean, :aliases => '--v', :desc => 'Show stack progress'
    option :'very-verbose', :type => :boolean, :aliases => '--vv', :desc => 'Show unchanged stacks'
    option :stack_group, :type => :string, :desc => 'The name of a stack group defined in your cloudfile to diff'
    option :stacks, :type => :array, :desc => 'A ordered space separated list of stacks to diff'
    def diff(stack = nil)
      @cloud.configure(File.absolute_path(options['cloudfile'], @cwd))
      last_event = nil

      @cloud.diff(stack, stack_group: options[:stack_group], stacks: options[:stacks]) do |d|
        if d.is_a? Model::Event
          if options[:'very-verbose'] || d.name == :error
            say_status(*d.to_thor)
          elsif options[:verbose]
            say_status(*d.to_thor) if d.name == :compare
          end
          last_event = d
        elsif d.is_a? Model::Diff
          if !options[:'very-verbose'] && !options[:verbose]
            say_status(*last_event.to_thor) unless last_event.nil?
            last_event = nil
          end
          say_status(*d.to_thor)
        else
          say_status(*d.to_thor)
        end
      end
    end

    desc 'print STACK', 'Print the rendered template for STACK'
    def print(stack)
      @cloud.configure(File.absolute_path(options['cloudfile'], @cwd))
      puts @cloud.stacks[stack].to_json(true)
    end

    desc 'validate STACK', 'Validate the rendered template for STACK'
    def validate(stack)
      @cloud.configure(File.absolute_path(options['cloudfile'], @cwd))
      @cloud.stacks[stack].validate
    end
  end
end

Convection::CLI.start(ARGV)