# SPDX-License-Identifier: Apache-2.0
#
#  The OpenSearch Contributors require contributions made to
#  this file be licensed under the Apache-2.0 license or a
#  compatible open source license.
#
#  Modifications Copyright OpenSearch Contributors. See
#  GitHub history for details.

require_relative "../../../spec/opensearch_spec_helper"

describe "Update actions using painless scripts", :integration => true, :update_tests => 'painless' do
  require "logstash/outputs/opensearch"

  def get_output( options={} )
    settings = {
      "manage_template" => true,
      "index" => "logstash-update",
      "template_overwrite" => true,
      "hosts" => get_host_port(),
      "action" => "update"
    }
    LogStash::Outputs::OpenSearch.new(settings.merge!(options))
  end

  before :each do
    @client = get_client
    # Delete all templates first.
    # Clean OpenSearch of data before we start.
    @client.indices.delete_template(:name => "*")
    # This can fail if there are no indexes, ignore failure.
    @client.indices.delete(:index => "*") rescue nil
    @client.index(
      :index => 'logstash-update',
      :type => doc_type,
      :id => "123",
      :body => { :message => 'Test', :counter => 1 }
    )
    @client.indices.refresh
  end

  context "scripted updates" do

    it "should increment a counter with event/doc 'count' variable with inline script" do
      subject = get_output({
        'document_id' => "123",
        'script' => 'ctx._source.counter += params.event.counter',
        'script_type' => 'inline'
      })
      subject.register
      subject.multi_receive([LogStash::Event.new("counter" => 3 )])
      r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "123", :refresh => true)
      expect(r["_source"]["counter"]).to eq(4)
    end

    it "should increment a counter with event/doc 'count' variable with event/doc as upsert and inline script" do
      subject = get_output({
        'document_id' => "123",
        'doc_as_upsert' => true,
        'script' => 'if( ctx._source.containsKey("counter") ){ ctx._source.counter += params.event.counter; } else { ctx._source.counter = params.event.counter; }',
        'script_type' => 'inline'
      })
      subject.register
      subject.multi_receive([LogStash::Event.new("counter" => 3 )])
      r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "123", :refresh => true)
      expect(r["_source"]["counter"]).to eq(4)
    end

    it "should, with new doc, set a counter with event/doc 'count' variable with event/doc as upsert and inline script" do
      subject = get_output({
        'document_id' => "456",
        'doc_as_upsert' => true,
        'script' => 'if( ctx._source.containsKey("counter") ){ ctx._source.counter += params.event.counter; } else { ctx._source.counter = params.event.counter; }',
        'script_type' => 'inline'
      })
      subject.register
      subject.multi_receive([LogStash::Event.new("counter" => 3 )])
      r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "456", :refresh => true)
      expect(r["_source"]["counter"]).to eq(3)
    end

    context 'with an indexed script' do
      it "should increment a counter with event/doc 'count' variable with indexed script" do
        @client.perform_request(:put, "_scripts/indexed_update", {}, {"script" => {"source" => "ctx._source.counter += params.event.count", "lang" => "painless"}})
        plugin_parameters = {
          'document_id' => "123",
          'script' => 'indexed_update',
          'script_type' => 'indexed'
        }

        plugin_parameters.merge!('script_lang' => '')

        subject = get_output(plugin_parameters)
        subject.register
        subject.multi_receive([LogStash::Event.new("count" => 4 )])
        r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "123", :refresh => true)
        expect(r["_source"]["counter"]).to eq(5)
      end
    end
   end

  context "when update with upsert" do
    it "should create new documents with provided upsert" do
      subject = get_output({ 'document_id' => "456", 'upsert' => '{"message": "upsert message"}' })
      subject.register
      subject.multi_receive([LogStash::Event.new("message" => "sample message here")])
      r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "456", :refresh => true)
      expect(r["_source"]["message"]).to eq('upsert message')
    end

    it "should create new documents with event/doc as upsert" do
      subject = get_output({ 'document_id' => "456", 'doc_as_upsert' => true })
      subject.register
      subject.multi_receive([LogStash::Event.new("message" => "sample message here")])
      r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "456", :refresh => true)
      expect(r["_source"]["message"]).to eq('sample message here')
    end

    it "should fail on documents with event/doc as upsert at external version" do
      subject = get_output({ 'document_id' => "456", 'doc_as_upsert' => true, 'version' => 999, "version_type" => "external" })
      expect { subject.register }.to raise_error(LogStash::ConfigurationError)
    end
  end

  context "updates with scripted upsert" do

    context 'with an inline script' do
      it "should create new documents with upsert content" do
        subject = get_output({ 'document_id' => "456", 'script' => 'ctx._source.counter = params.event.counter', 'upsert' => '{"message": "upsert message"}', 'script_type' => 'inline' })
        subject.register

        subject.multi_receive([LogStash::Event.new("message" => "sample message here")])
        r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "456", :refresh => true)
        expect(r["_source"]["message"]).to eq('upsert message')
      end

      it "should create new documents with event/doc as script params" do
        subject = get_output({ 'document_id' => "456", 'script' => 'ctx._source.counter = params.event.counter', 'scripted_upsert' => true, 'script_type' => 'inline' })
        subject.register
        subject.multi_receive([LogStash::Event.new("counter" => 1)])
        @client.indices.refresh
        r = @client.get(:index => 'logstash-update', :type => doc_type, :id => "456", :refresh => true)
        expect(r["_source"]["counter"]).to eq(1)
      end
    end
  end
end