#
# Author:: Daniel DeLeo (<dan@chef.io>)
# Copyright:: Copyright (c) Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require "spec_helper"
require "tiny_server"

describe Chef::Knife::Ssh do

  before(:each) do
    Chef::Knife::Ssh.load_deps
    @server = TinyServer::Manager.new
    @server.start
  end

  after(:each) do
    @server.stop
  end

  let(:ssh_config) { {} }
  before do
    allow(Net::SSH).to receive(:configuration_for).and_return(ssh_config)
  end

  describe "identity file" do
    context "when knife[:ssh_identity_file] is set" do
      before do
        Chef::Config[:knife][:ssh_identity_file] = "~/.ssh/aws.rsa"
        setup_knife(["*:*", "uptime"])
      end

      it "uses the ssh_identity_file" do
        @knife.run
        expect(@knife.config[:ssh_identity_file]).to eq("~/.ssh/aws.rsa")
      end
    end

    context "when knife[:ssh_identity_file] is set and frozen" do
      before do
        Chef::Config[:knife][:ssh_identity_file] = "~/.ssh/aws.rsa".freeze
        setup_knife(["*:*", "uptime"])
      end

      it "uses the ssh_identity_file" do
        @knife.run
        expect(@knife.config[:ssh_identity_file]).to eq("~/.ssh/aws.rsa")
      end
    end

    context "when -i is provided" do
      before do
        Chef::Config[:knife][:ssh_identity_file] = nil
        setup_knife(["-i ~/.ssh/aws.rsa", "*:*", "uptime"])
      end

      it "should use the value on the command line" do
        @knife.run
        expect(@knife.config[:ssh_identity_file]).to eq("~/.ssh/aws.rsa")
      end

      it "should override what is set in knife.rb" do
        Chef::Config[:knife][:ssh_identity_file] = "~/.ssh/other.rsa"
        @knife.merge_configs
        @knife.run
        expect(@knife.config[:ssh_identity_file]).to eq("~/.ssh/aws.rsa")
      end
    end

    context "when knife[:ssh_identity_file] is not provided]" do
      before do
        Chef::Config[:knife][:ssh_identity_file] = nil
        setup_knife(["*:*", "uptime"])
      end

      it "uses the default" do
        @knife.run
        expect(@knife.config[:ssh_identity_file]).to eq(nil)
      end
    end
  end

  describe "port" do
    context "when -p 31337 is provided" do
      before do
        setup_knife(["-p 31337", "*:*", "uptime"])
      end

      it "uses the ssh_port" do
        @knife.run
        expect(@knife.config[:ssh_port]).to eq("31337")
      end
    end
  end

  describe "user" do
    context "when knife[:ssh_user] is set" do
      before do
        Chef::Config[:knife][:ssh_user] = "ubuntu"
        setup_knife(["*:*", "uptime"])
      end

      it "uses the ssh_user" do
        @knife.run
        expect(@knife.config[:ssh_user]).to eq("ubuntu")
      end
    end

    context "when knife[:ssh_user] is set and frozen" do
      before do
        Chef::Config[:knife][:ssh_user] = "ubuntu".freeze
        setup_knife(["*:*", "uptime"])
      end

      it "uses the ssh_user" do
        @knife.run
        expect(@knife.config[:ssh_user]).to eq("ubuntu")
      end
    end

    context "when -x is provided" do
      before do
        Chef::Config[:knife][:ssh_user] = nil
        setup_knife(["-x ubuntu", "*:*", "uptime"])
      end

      it "should use the value on the command line" do
        @knife.run
        expect(@knife.config[:ssh_user]).to eq("ubuntu")
      end

      it "should override what is set in knife.rb" do
        Chef::Config[:knife][:ssh_user] = "root"
        @knife.merge_configs
        @knife.run
        expect(@knife.config[:ssh_user]).to eq("ubuntu")
      end
    end

    context "when knife[:ssh_user] is not provided]" do
      before do
        Chef::Config[:knife][:ssh_user] = nil
        setup_knife(["*:*", "uptime"])
      end

      it "uses the default (current user)" do
        @knife.run
        expect(@knife.config[:ssh_user]).to eq(nil)
      end
    end
  end

  describe "attribute" do
    context "when knife[:ssh_attribute] is set" do
      before do
        Chef::Config[:knife][:ssh_attribute] = "ec2.public_hostname"
        setup_knife(["*:*", "uptime"])
      end

      it "uses the ssh_attribute" do
        @knife.run
        expect(@knife.get_ssh_attribute({ "target" => "ec2.public_hostname" })).to eq("ec2.public_hostname")
      end
    end

    context "when knife[:ssh_attribute] is not provided" do
      before do
        Chef::Config[:knife][:ssh_attribute] = nil
        setup_knife(["*:*", "uptime"])
      end

      it "uses the default" do
        @knife.run
        expect(@knife.get_ssh_attribute({ "fqdn" => "fqdn" })).to eq("fqdn")
      end
    end

    context "when -a ec2.public_public_hostname is provided" do
      before do
        Chef::Config[:knife][:ssh_attribute] = nil
        setup_knife(["-a", "ec2.public_hostname", "*:*", "uptime"])
      end

      it "should use the value on the command line" do
        @knife.run
        expect(@knife.config[:ssh_attribute]).to eq("ec2.public_hostname")
      end

      it "should override what is set in knife.rb" do
        # This is the setting imported from knife.rb
        Chef::Config[:knife][:ssh_attribute] = "fqdn"
        @knife.merge_configs
        # Then we run knife with the -a flag, which sets the above variable
        setup_knife(["-a", "ec2.public_hostname", "*:*", "uptime"])
        @knife.run
        expect(@knife.config[:ssh_attribute]).to eq("ec2.public_hostname")
      end
    end
  end

  describe "prefix" do
    context "when knife[:prefix_attribute] is set" do
      before do
        Chef::Config[:knife][:prefix_attribute] = "name"
        setup_knife(["*:*", "uptime"])
      end

      it "uses the prefix_attribute" do
        @knife.run
        expect(@knife.get_prefix_attribute({ "prefix" => "name" })).to eq("name")
      end
    end

    context "when knife[:prefix_attribute] is not provided" do
      before do
        Chef::Config[:knife][:prefix_attribute] = nil
        setup_knife(["*:*", "uptime"])
      end

      it "falls back to nil" do
        @knife.run
        expect(@knife.get_prefix_attribute({})).to eq(nil)
      end
    end

    context "when --prefix-attribute ec2.public_public_hostname is provided" do
      before do
        Chef::Config[:knife][:prefix_attribute] = nil
        setup_knife(["--prefix-attribute", "ec2.public_hostname", "*:*", "uptime"])
      end

      it "should use the value on the command line" do
        @knife.run
        expect(@knife.config[:prefix_attribute]).to eq("ec2.public_hostname")
      end

      it "should override what is set in knife.rb" do
        # This is the setting imported from knife.rb
        Chef::Config[:knife][:prefix_attribute] = "fqdn"
        @knife.merge_configs
        # Then we run knife with the -b flag, which sets the above variable
        setup_knife(["--prefix-attribute", "ec2.public_hostname", "*:*", "uptime"])
        @knife.run
        expect(@knife.config[:prefix_attribute]).to eq("ec2.public_hostname")
      end
    end
  end

  describe "gateway" do
    context "when knife[:ssh_gateway] is set" do
      before do
        Chef::Config[:knife][:ssh_gateway] = "user@ec2.public_hostname"
        setup_knife(["*:*", "uptime"])
      end

      it "uses the ssh_gateway" do
        expect(@knife.session).to receive(:via).with("ec2.public_hostname", "user", { append_all_supported_algorithms: true })
        @knife.run
        expect(@knife.config[:ssh_gateway]).to eq("user@ec2.public_hostname")
      end
    end

    context "when -G user@ec2.public_hostname is provided" do
      before do
        Chef::Config[:knife][:ssh_gateway] = nil
        setup_knife(["-G user@ec2.public_hostname", "*:*", "uptime"])
      end

      it "uses the ssh_gateway" do
        expect(@knife.session).to receive(:via).with("ec2.public_hostname", "user", { append_all_supported_algorithms: true })
        @knife.run
        expect(@knife.config[:ssh_gateway]).to eq("user@ec2.public_hostname")
      end
    end

    context "when knife[:ssh_gateway_identity] is set" do
      before do
        Chef::Config[:knife][:ssh_gateway] = "user@ec2.public_hostname"
        Chef::Config[:knife][:ssh_gateway_identity] = "~/.ssh/aws-gateway.rsa"
        setup_knife(["*:*", "uptime"])
      end

      it "uses the ssh_gateway_identity file" do
        expect(@knife.session).to receive(:via).with("ec2.public_hostname", "user", { append_all_supported_algorithms: true, keys: File.expand_path("#{ENV["HOME"]}/.ssh/aws-gateway.rsa").squeeze("/"), keys_only: true })
        @knife.run
        expect(@knife.config[:ssh_gateway_identity]).to eq("~/.ssh/aws-gateway.rsa")
      end
    end

    context "when -ssh-gateway-identity is provided and knife[:ssh_gateway] is set" do
      before do
        Chef::Config[:knife][:ssh_gateway] = "user@ec2.public_hostname"
        Chef::Config[:knife][:ssh_gateway_identity] = nil
        setup_knife(["--ssh-gateway-identity", "~/.ssh/aws-gateway.rsa", "*:*", "uptime"])
      end

      it "uses the ssh_gateway_identity file" do
        expect(@knife.session).to receive(:via).with("ec2.public_hostname", "user", { append_all_supported_algorithms: true, keys: File.expand_path("#{ENV["HOME"]}/.ssh/aws-gateway.rsa").squeeze("/"), keys_only: true })
        @knife.run
        expect(@knife.config[:ssh_gateway_identity]).to eq("~/.ssh/aws-gateway.rsa")
      end
    end

    context "when the gateway requires a password" do
      before do
        Chef::Config[:knife][:ssh_gateway] = nil
        setup_knife(["-G user@ec2.public_hostname", "*:*", "uptime"])
        allow(@knife.session).to receive(:via) do |host, user, options|
          raise Net::SSH::AuthenticationFailed unless options[:password]
        end
      end

      it "should prompt the user for a password" do
        expect(@knife.ui).to receive(:ask).with("Enter the password for user@ec2.public_hostname: ", echo: false).and_return("password")
        @knife.run
      end
    end
  end

  def setup_knife(params = [])
    @knife = Chef::Knife::Ssh.new(params)
    # We explicitly avoid running #configure_chef, which would read a knife.rb
    # if available, but #merge_configs (which is called by #configure_chef) is
    # necessary to have default options merged in.
    @knife.merge_configs
    allow(@knife).to receive(:ssh_command) { 0 }
    @api = TinyServer::API.instance
    @api.clear

    Chef::Config[:node_name] = nil
    Chef::Config[:client_key] = nil
    Chef::Config[:chef_server_url] = "http://localhost:9000"

    @api.post("/search/node?q=*:*&start=0&rows=1000", 200) do
      %({"total":1, "start":0, "rows":[{"data": {"fqdn":"the.fqdn", "target": "the_public_hostname"}}]})
    end
  end

end