require 'httparty'
require 'json'

module GTAPI
  class GaptoolServer
    include HTTParty
    default_timeout 600
    DEFAULT_AWS_AZ = 'us-west-2c'
    attr_reader :version

    def initialize(user, apikey, uri, default_aws_az=DEFAULT_AWS_AZ)
      @auth = { 'X-GAPTOOL-USER' => user, 'X-GAPTOOL-KEY' => apikey}
      default_aws_az = default_aws_az || DEFAULT_AWS_AZ
      @default_aws_az = default_aws_az
      @default_aws_region = default_aws_az[0..-2]
      @version = File.read(File.realpath(File.join(File.dirname(__FILE__), "..", 'VERSION'))).strip
      GaptoolServer.base_uri uri
    end

    def rehash()
      options = {:body => '', :headers => @auth}
      JSON::parse self.class.post("/rehash", options)
    end

    def getonenode(id)
      options = {:headers => @auth}
      JSON::parse self.class.get("/instance/#{id}", options)
    end

    def getenvroles(role, environment)
      options = {:headers => @auth}
      JSON::parse self.class.get("/hosts/#{role}/#{environment}", options)
    end

    def addnode(zone, itype, role, environment, mirror=nil, security_group=nil, ami=nil, chef_repo=nil, chef_branch=nil)
      @body = {
        'zone' => zone || @default_aws_az,
        'itype' => itype,
        'role' => role,
        'environment' => environment,
        'ami' => ami,
        'chef_repo' => chef_repo,
        'chef_branch' => chef_branch
      }
      unless security_group.nil?
        @body['security_group'] = security_group
      end
      @body = @body.to_json
      options = { :body => @body, :headers => @auth}
      JSON::parse self.class.post("/init", options)
    end

    def terminatenode(id, zone)
      @body = {'id' => id, 'zone' => zone || @default_aws_region}.to_json
      options = {:body => @body, :headers => @auth}
      JSON::parse self.class.post("/terminate", options)
    end

    def getappnodes(app, environment)
      options = {:headers => @auth}
      role = JSON::parse(self.class.get("/apps", options))["app:#{app}"]['role']
      JSON::parse self.class.get("/hosts/#{role}/#{environment}", options)
    end

    def ssh(role, environment, id)
      options = { :headers => @auth}
      JSON::parse self.class.get("/ssh/#{role}/#{environment}/#{id}", options)
    end

    def getrolenodes(role)
      options = { :headers => @auth}
      JSON::parse self.class.get("/hosts/#{role}", options)
    end

    def getenvnodes(environment)
      options = { :headers => @auth}
      JSON::parse self.class.get("/hosts/ALL/#{environment}", options)
    end

    def getallnodes()
      options = { :headers => @auth}
      JSON::parse self.class.get("/hosts", options)
    end

    def api_version()
      options = { :headers => @auth }
      JSON::parse self.class.get("/version", options)
    end
  end
end