#!/usr/bin/env bash

# Copyright 2022 The Kubernetes Authors.
#
# 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.

set -o errexit
set -o nounset
set -o pipefail

# Runs tests for kubectl diff
run_kubectl_events_tests() {
    set -o nounset
    set -o errexit

    create_and_use_new_namespace
    kube::log::status "Testing kubectl events"

    ### Create a new namespace
    # Pre-condition: the test-events namespace does not exist
    kube::test::get_object_assert 'namespaces' "{{range.items}}{{ if eq ${id_field:?} \"test-events\" }}found{{end}}{{end}}:" ':'
    # Command
    kubectl create namespace test-events
    # Post-condition: namespace 'test-events' is created.
    kube::test::get_object_assert 'namespaces/test-events' "{{$id_field}}" 'test-events'

    # Pre-condition: event does not exist for Cronjob/pi in any namespace
    output_message=$(kubectl events -A "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_not_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Pre-condition: cronjob does not exist in test-events namespace
    kube::test::get_object_assert 'cronjob --namespace=test-events' "{{range.items}}{{ if eq $id_field \"pi\" }}found{{end}}{{end}}:" ':'
    ### Create a cronjob in a specific namespace
    kubectl create cronjob pi --schedule="59 23 31 2 *" --namespace=test-events "--image=$IMAGE_PERL" -- perl -Mbignum=bpi -wle 'print bpi(20)' "${kube_flags[@]:?}"
    ### Create a crd
    kubectl create -f - << __EOF__
{
  "kind": "CustomResourceDefinition",
  "apiVersion": "apiextensions.k8s.io/v1",
  "metadata": {
    "name": "cronjobs.example.com"
  },
  "spec": {
    "group": "example.com",
    "scope": "Namespaced",
    "names": {
      "plural": "cronjobs",
      "singular": "cronjob",
      "kind": "Cronjob"
    },
    "versions": [
      {
        "name": "v1",
        "served": true,
        "storage": true,
        "schema": {
          "openAPIV3Schema": {
            "type": "object",
            "properties": {
              "spec": {
                "type": "object",
                "properties": {
                  "image": {"type": "string"}
                }
              }
            }
          }
        }
      }
    ]
  }
}
__EOF__

    ### Create a example.com/v1 Cronjob in a specific namespace
    kubectl create -f - << __EOF__
{
  "kind": "Cronjob",
  "apiVersion": "example.com/v1",
  "metadata": {
    "name": "pi",
    "namespace": "test-events"
  },
  "spec": {
    "image": "test"
  }
}
__EOF__

    # Post-Condition: assertion object exists
    kube::test::get_object_assert 'cronjob/pi --namespace=test-events' "{{$id_field}}" 'pi'

    # Post-Condition: events --all-namespaces returns event for Cronjob/pi
    output_message=$(kubectl events -A "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events for test-events namespace returns event for Cronjob/pi
    output_message=$(kubectl events -n test-events "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for Cronjob/pi when --for flag is used
    output_message=$(kubectl events -n test-events --for=Cronjob/pi "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for fully qualified Cronjob.v1.batch/pi when --for flag is used
    output_message=$(kubectl events -n test-events --for Cronjob.v1.batch/pi "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events not returns event for fully qualified Cronjob.v1.example.com/pi when --for flag is used
    output_message=$(kubectl events -n test-events --for Cronjob.v1.example.com/pi "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_not_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for fully qualified without version Cronjob.batch/pi when --for flag is used
    output_message=$(kubectl events -n test-events --for=Cronjob.batch/pi "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for Cronjob/pi when watch is enabled
    output_message=$(kubectl events -n test-events --for=Cronjob/pi --watch --request-timeout=1 "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for Cronjob/pi when filtered by Warning
    output_message=$(kubectl events -n test-events --for=Cronjob/pi --types=Warning "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events not returns event for Cronjob/pi when filtered only by Normal
    output_message=$(kubectl events -n test-events --for=Cronjob/pi --types=Normal "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_not_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for Cronjob/pi without headers
    output_message=$(kubectl events -n test-events --for=Cronjob/pi --no-headers "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_not_string "${output_message}" "LAST SEEN" "TYPE" "REASON"
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for Cronjob/pi in json format
    output_message=$(kubectl events -n test-events --for=Cronjob/pi --output=json "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    # Post-Condition: events returns event for Cronjob/pi in yaml format
    output_message=$(kubectl events -n test-events --for=Cronjob/pi --output=yaml "${kube_flags[@]:?}" 2>&1)
    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"

    #Clean up
    kubectl delete cronjob pi --namespace=test-events
    kubectl delete cronjobs.v1.example.com pi --namespace=test-events
    kubectl delete crd cronjobs.example.com
    kubectl delete namespace test-events

    set +o nounset
    set +o errexit
}