#
# Author:: Bryan McLellan (btm@loftninjas.org)
# Copyright:: Copyright 2009-2016, Bryan McLellan
# 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"

describe Chef::Provider::Route do
  before do
    @node = Chef::Node.new
    @cookbook_collection = Chef::CookbookCollection.new([])
    @events = Chef::EventDispatch::Dispatcher.new
    @run_context = Chef::RunContext.new(@node, @cookbook_collection, @events)

    @new_resource = Chef::Resource::Route.new("10.0.0.10")
    @new_resource.gateway "10.0.0.9"
    @current_resource = Chef::Resource::Route.new("10.0.0.10")
    @current_resource.gateway "10.0.0.9"

    @provider = Chef::Provider::Route.new(@new_resource, @run_context)
    @provider.current_resource = @current_resource
  end

  describe Chef::Provider::Route, "hex2ip" do
    it "should return nil if ip address is invalid" do
      expect(@provider.hex2ip("foo")).to be_nil # does not even look like an ip
      expect(@provider.hex2ip("ABCDEFGH")).to be_nil # 8 chars, but invalid
    end

    it "should return quad-dotted notation for a valid IP" do
      expect(@provider.hex2ip("01234567")).to eq("103.69.35.1")
      expect(@provider.hex2ip("0064a8c0")).to eq("192.168.100.0")
      expect(@provider.hex2ip("00FFFFFF")).to eq("255.255.255.0")
    end
  end

  describe Chef::Provider::Route, "load_current_resource" do
    context "on linux" do
      before do
        @node.automatic_attrs[:os] = "linux"
        routing_table = "Iface	Destination	Gateway 	Flags	RefCnt	Use	Metric	Mask		MTU	Window	IRTT\n" \
          "eth0	0064A8C0	0984A8C0	0003	0	0	0	00FFFFFF	0	0	0\n"
        route_file = StringIO.new(routing_table)
        allow(File).to receive(:open).with("/proc/net/route", "r").and_return(route_file)
      end

      it "should set is_running to false when a route is not detected" do
        resource = Chef::Resource::Route.new("10.10.10.0/24")
        allow(resource).to receive(:gateway).and_return("10.0.0.1")
        allow(resource).to receive(:device).and_return("eth0")
        provider = Chef::Provider::Route.new(resource, @run_context)

        provider.load_current_resource
        expect(provider.is_running).to be_falsey
      end

      it "should detect existing routes and set is_running attribute correctly" do
        resource = Chef::Resource::Route.new("192.168.100.0/24")
        allow(resource).to receive(:gateway).and_return("192.168.132.9")
        allow(resource).to receive(:device).and_return("eth0")
        provider = Chef::Provider::Route.new(resource, @run_context)

        provider.load_current_resource
        expect(provider.is_running).to be_truthy
      end

      it "should use gateway value when matching routes" do
        resource = Chef::Resource::Route.new("192.168.100.0/24")
        allow(resource).to receive(:gateway).and_return("10.10.10.10")
        allow(resource).to receive(:device).and_return("eth0")
        provider = Chef::Provider::Route.new(resource, @run_context)

        provider.load_current_resource
        expect(provider.is_running).to be_falsey
      end
    end
  end

  describe Chef::Provider::Route, "action_add" do
    it "should add the route if it does not exist" do
      allow(@provider).to receive(:shell_out!)
      allow(@current_resource).to receive(:gateway).and_return(nil)
      expect(@provider).to receive(:generate_command).with(:add).and_return(["command"])
      expect(@provider).to receive(:generate_config)
      @provider.run_action(:add)
      expect(@new_resource).to be_updated
    end

    it "should not add the route if it exists" do
      allow(@provider).to receive(:shell_out!)
      allow(@provider).to receive(:is_running).and_return(true)
      expect(@provider).not_to receive(:generate_command).with(:add)
      expect(@provider).to receive(:generate_config)
      @provider.run_action(:add)
      expect(@new_resource).not_to be_updated
    end

    it "should not delete config file for :add action (CHEF-3332)" do
      @node.automatic_attrs[:platform] = "centos"

      route_file = StringIO.new
      expect(File).to receive(:new).and_return(route_file)
      @resource_add = Chef::Resource::Route.new("192.168.1.0/24 via 192.168.0.1")
      @run_context.resource_collection << @resource_add
      allow(@provider).to receive(:shell_out!).and_return(true)

      @resource_add.action(:add)
      @provider.run_action(:add)
      expect(route_file.string.split("\n").size).to eq(1)
      expect(route_file.string).to match(/^192\.168\.1\.0\/24 via 192\.168\.0\.1$/)
    end
  end

  describe Chef::Provider::Route, "action_delete" do
    it "should delete the route if it exists" do
      allow(@provider).to receive(:shell_out!).and_return(true)
      expect(@provider).to receive(:generate_command).with(:delete).and_return(["command"])
      allow(@provider).to receive(:is_running).and_return(true)
      @provider.run_action(:delete)
      expect(@new_resource).to be_updated
    end

    it "should not delete the route if it does not exist" do
      allow(@current_resource).to receive(:gateway).and_return(nil)
      allow(@provider).to receive(:shell_out!).and_return(true)
      expect(@provider).not_to receive(:generate_command).with(:add)
      @provider.run_action(:delete)
      expect(@new_resource).not_to be_updated
    end
  end

  describe Chef::Provider::Route, "generate_command for action_add" do
    it "should include a netmask when a one is specified" do
      allow(@new_resource).to receive(:netmask).and_return("255.255.0.0")
      expect(@provider.generate_command(:add).join(" ")).to match(/\/\d{1,2}/)
    end

    it "should not include a netmask when a one is specified" do
      allow(@new_resource).to receive(:netmask).and_return(nil)
      expect(@provider.generate_command(:add).join(" ")).not_to match(/\/\d{1,2}/)
    end

    it "should include ' via $gateway ' when a gateway is specified" do
      expect(@provider.generate_command(:add).join(" ")).to match(/\svia\s#{Regexp.escape(@new_resource.gateway.to_s)}/)
    end

    it "should not include ' via $gateway ' when a gateway is not specified" do
      allow(@new_resource).to receive(:gateway).and_return(nil)
      expect(@provider.generate_command(:add).join(" ")).not_to match(/\svia\s#{Regexp.escape(@new_resource.gateway.to_s)}/)
    end
  end

  describe Chef::Provider::Route, "generate_command for action_delete" do
    it "should include a netmask when a one is specified" do
      allow(@new_resource).to receive(:netmask).and_return("255.255.0.0")
      expect(@provider.generate_command(:delete).join(" ")).to match(/\/\d{1,2}/)
    end

    it "should not include a netmask when a one is specified" do
      allow(@new_resource).to receive(:netmask).and_return(nil)
      expect(@provider.generate_command(:delete).join(" ")).not_to match(/\/\d{1,2}/)
    end

    it "should include ' via $gateway ' when a gateway is specified" do
      expect(@provider.generate_command(:delete).join(" ")).to match(/\svia\s#{Regexp.escape(@new_resource.gateway.to_s)}/)
    end

    it "should not include ' via $gateway ' when a gateway is not specified" do
      allow(@new_resource).to receive(:gateway).and_return(nil)
      expect(@provider.generate_command(:delete).join(" ")).not_to match(/\svia\s#{Regexp.escape(@new_resource.gateway.to_s)}/)
    end
  end

  describe Chef::Provider::Route, "config_file_contents for action_add" do
    it "should include a netmask when a one is specified" do
      allow(@new_resource).to receive(:netmask).and_return("255.255.0.0")
      expect(@provider.config_file_contents(:add, target: @new_resource.target, netmask: @new_resource.netmask)).to match(/\/\d{1,2}.*\n$/)
    end

    it "should not include a netmask when a one is specified" do
      expect(@provider.config_file_contents(:add, target: @new_resource.target)).not_to match(/\/\d{1,2}.*\n$/)
    end

    it "should include ' via $gateway ' when a gateway is specified" do
      expect(@provider.config_file_contents(:add, target: @new_resource.target, gateway: @new_resource.gateway)).to match(/\svia\s#{Regexp.escape(@new_resource.gateway.to_s)}\n/)
    end

    it "should not include ' via $gateway ' when a gateway is not specified" do
      expect(@provider.generate_command(:add).join(" ")).not_to match(/\svia\s#{Regexp.escape(@new_resource.gateway.to_s)}\n/)
    end
  end

  describe Chef::Provider::Route, "config_file_contents for action_delete" do
    it "should return an empty string" do
      expect(@provider.config_file_contents(:delete)).to match(/^$/)
    end
  end

  describe Chef::Provider::Route, "generate_config method" do
    %w{ centos redhat fedora }.each do |platform|
      it "should write a route file on #{platform} platform" do
        @node.automatic_attrs[:platform] = platform

        route_file = StringIO.new
        expect(File).to receive(:new).with("/etc/sysconfig/network-scripts/route-eth0", "w").and_return(route_file)
        # Chef::Log.should_receive(:debug).with("route[10.0.0.10] writing route.eth0\n10.0.0.10 via 10.0.0.9\n")
        @run_context.resource_collection << @new_resource
        @provider.generate_config
      end
    end

    it "should put all routes for a device in a route config file" do
      @node.automatic_attrs[:platform] = "centos"

      route_file = StringIO.new
      expect(File).to receive(:new).and_return(route_file)
      @run_context.resource_collection << Chef::Resource::Route.new("192.168.1.0/24 via 192.168.0.1")
      @run_context.resource_collection << Chef::Resource::Route.new("192.168.2.0/24 via 192.168.0.1")
      @run_context.resource_collection << Chef::Resource::Route.new("192.168.3.0/24 via 192.168.0.1")
      @run_context.resource_collection << Chef::Resource::Route.new("Complex Route").tap do |r|
        r.target "192.168.4.0"
        r.gateway "192.168.0.1"
        r.netmask "255.255.255.0"
      end

      @provider.action = :add
      @provider.generate_config
      expect(route_file.string.split("\n").size).to eq(4)
      expect(route_file.string).to match(/^192\.168\.1\.0\/24 via 192\.168\.0\.1$/)
      expect(route_file.string).to match(/^192\.168\.2\.0\/24 via 192\.168\.0\.1$/)
      expect(route_file.string).to match(/^192\.168\.3\.0\/24 via 192\.168\.0\.1$/)
      expect(route_file.string).to match(/^192\.168\.4\.0\/24 via 192\.168\.0\.1$/)
    end
  end
end