#!/usr/bin/env ruby

begin
  require 'depl'
rescue LoadError
  require 'rubygems'
  require 'depl'
end

require 'optparse'
require 'highline/import'
require 'colorize'

options = {}

options[:environment] = ARGV.reject{|a| a =~ /^-/}.first

options[:rev] = ENV['REV']

optparse = OptionParser.new do |opts|
  opts.banner = "Usage: depl [environment] [options]"

  opts.on("-c", "--config=CONFIG", String, "Location of .deploy configuration file") do |c|
    options[:config_file] = c
  end

  opts.on("-r", "--revision=REVISION", String, "Revision to deploy (can be sha, branch, etc)") do |r|
    options[:rev] = r
  end

  opts.on("-f", "--force", "Do not ask for confirmation") do |f|
    options[:force] = f
  end

  opts.on("-q", "--quiet", "No stdout output (only use with --force)") do |q|
    options[:quiet] = q
  end

  opts.on("-h", "--help", "Print this help information") do |h|
    if h
      puts optparse
      exit 1
    end
  end
end
begin
  optparse.parse!
rescue OptionParser::InvalidOption => e
  puts e.message
  puts optparse
  exit 1
end

unless options[:environment]
  puts "Error: environment required"
  puts optparse
  exit 1
end

def output(*msg)
  puts *msg
end

if options[:force] and options[:quiet]
  def output(*msg)
    # no-op
  end
end

deploy = Depl::Main.new(options)

if deploy.up_to_date
  output "Everything up-to-date (#{deploy.environment.green}: #{deploy.remote_sha.green})"
  exit 0
end

if deploy.remote_sha.nil?
  output "New deployment: #{deploy.local_sha}"
else
  output "Attempting to deploy #{deploy.local_sha.bold}", ""

  commits = "#{deploy.commit_count} new commit(s)".green
  output "Difference of #{commits} between #{deploy.remote_sha} and #{deploy.local_sha}:", ""

  if deploy.commit_count > 0
    output deploy.diff.yellow, ""
  else
    output "    There are no new commits.", ""
  end
end

if deploy.older_local_sha
  output "WARNING: The commit you are deploying is older than what is currently on #{deploy.environment}. Missing commits: ".bold, ""
  output deploy.reverse_diff.red
  output ""
end

if options[:force]
  confirm = 'yes'
else
  confirm = ask("Deploy #{deploy.environment}? ([y]es / [n]o / [g]ithub) : ") { |yn| yn.limit = 1, yn.validate = /([yng]|yes|no|github)/i }
end

case confirm.downcase
when 'y', 'yes'
  deploy.run!

  output "Deployed #{deploy.remote_sha}"
when 'g', 'github'
  url = Depl::Remote.comparison(deploy.remote_sha, deploy.local_sha)
  if url
    if `which open`.size > 0
      `open #{url}`
    else
      output "  Github: #{url}"
    end
  else
    output "Unrecognized repository; can't open github"
    output "(try `git config --get remote.origin.url`)"
    exit 1
  end
when 'n', 'no'
  output "Bye."
end