#!/usr/bin/env ruby

require 'rubygems'
require 'yaml'
require 'json'
require 'net/http'
require 'uri'

class Jira
  @base
  @http
  @cookiejar

  def initialize(url)
    uri = URI.parse url
    @http = Net::HTTP.new uri.host, uri.port
    @base = File.join(uri.path, 'rest')
    @cookiejar = {}
  end

  def login(username, password)
    self.post_content '/auth/latest/session', { 'username' => username, 'password' => password }.to_json
  end

  def logout
    self.delete_request '/auth/latest/session'
  end

  def projects
    self.project
  end

  def project(key = nil)
    resp = self.get_content self.api_url('project' + (key ? "/#{key}" : ''))
    JSON.parse resp
  end

  def issues(project)
  end

  def issue(key)
    resp = self.get_content self.api_url("issue/#{key}")
    JSON.parse resp
  end

  def get_content(url = nil)
    resp = @http.get File.join(@base, url), { 'Cookie' => get_cookies }
    update_cookies resp['Set-Cookie']
    resp.body
  end

  def post_content(url, content)
    resp = @http.post File.join(@base, url), content, { 'Content-Type' => 'application/json', 'Cookie' => get_cookies }
    update_cookies resp['Set-Cookie']
    resp.body
  end

  def delete_request(url)
    resp = @http.delete File.join(@base, url), { 'Cookie' => get_cookies }
  end

  def api_url(url)
    File.join('/api/2.0.alpha1', url)
  end

  def update_cookies(jar)
    return if !jar
    jar.gsub(/Path=\S+[,]*/, '').split(/;\s+/).each do |cookie|
      next unless (pair = cookie.split(/\=/)).length == 2
      @cookiejar[pair.first] = pair.last
    end
  end

  def get_cookies
    @cookiejar.map { |x| x * '=' }.join('; ')
  end
end

jira = Jira.new ENV['JIRA_URL']
jira.login ENV['JIRA_USER'], ENV['JIRA_PASSWD']
puts jira.issue('SYS-277')['fields']['status'].to_yaml
jira.logout