#!/usr/bin/env ruby

module Script
  class Jira

    JIRA_URL = ENV['JIRA_URL'][0] == '/' ? ENV['JIRA_URL'] : "#{ENV['JIRA_URL']}/".freeze

    def self.launch
      new.launch
    end

    def initialize
      if File.exists?('.git')
        @branch = branch
      end
    end

    def branch
      current_branch = `git branch | grep "\*"`
      !!current_branch.match(/^fatal/) || current_branch.gsub('* ', '').strip
    end

    def open
      case `uname -s`
      when /Darwin/i
        'open'
      when /Linux/i
        'xdg-open'
      end
    end

    def launch
      if JIRA_URL && @branch
        puts "Launching Jira in your default browser..."
        if ['master', 'develop'].include?(@branch)
          `#{open} #{JIRA_URL}`
          JIRA_URL
        else
          url = "#{JIRA_URL}browse/#{@branch}"
          `#{open} #{url}`
          url
        end
      else
        puts "You need a JIRA_URL in your environment variables." if !JIRA_URL
        puts "There's something wrong with git. Are you sure you're in a directory with git init'd?" if !@branch
      end
    end
  end
end

Script::Jira.launch