/*
Copyright 2016 The Kubernetes Authors All rights reserved.

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.
*/

package framework

import (
	"flag"
	"os"
	"time"

	"github.com/onsi/ginkgo/config"
	"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
	"k8s.io/kubernetes/pkg/cloudprovider"
)

type TestContextType struct {
	KubeConfig         string
	KubeContext        string
	KubeAPIContentType string
	KubeVolumeDir      string
	CertDir            string
	Host               string
	RepoRoot           string
	Provider           string
	CloudConfig        CloudConfig
	KubectlPath        string
	OutputDir          string
	ReportDir          string
	ReportPrefix       string
	Prefix             string
	MinStartupPods     int
	// Timeout for waiting for system pods to be running
	SystemPodsStartupTimeout time.Duration
	UpgradeTarget            string
	PrometheusPushGateway    string
	OSDistro                 string
	ContainerRuntime         string
	VerifyServiceAccount     bool
	DeleteNamespace          bool
	CleanStart               bool
	// If set to 'true' or 'all' framework will start a goroutine monitoring resource usage of system add-ons.
	// It will read the data every 30 seconds from all Nodes and print summary during afterEach. If set to 'master'
	// only master Node will be monitored.
	GatherKubeSystemResourceUsageData string
	GatherLogsSizes                   bool
	GatherMetricsAfterTest            bool
	// Currently supported values are 'hr' for human-readable and 'json'. It's a comma separated list.
	OutputPrintType string
	// CreateTestingNS is responsible for creating namespace used for executing e2e tests.
	// It accepts namespace base name, which will be prepended with e2e prefix, kube client
	// and labels to be applied to a namespace.
	CreateTestingNS CreateTestingNSFn
	// If set to true test will dump data about the namespace in which test was running.
	DumpLogsOnFailure bool
	// Name of the node to run tests on (node e2e suite only).
	NodeName string
}

type CloudConfig struct {
	ProjectID         string
	Zone              string
	Cluster           string
	MasterName        string
	NodeInstanceGroup string
	NumNodes          int
	ClusterTag        string
	ServiceAccount    string

	Provider cloudprovider.Interface
}

var TestContext TestContextType
var federatedKubeContext string

// Register flags common to all e2e test suites.
func RegisterCommonFlags() {
	// Turn on verbose by default to get spec names
	config.DefaultReporterConfig.Verbose = true

	// Turn on EmitSpecProgress to get spec progress (especially on interrupt)
	config.GinkgoConfig.EmitSpecProgress = true

	// Randomize specs as well as suites
	config.GinkgoConfig.RandomizeAllSpecs = true

	flag.StringVar(&TestContext.GatherKubeSystemResourceUsageData, "gather-resource-usage", "false", "If set to 'true' or 'all' framework will be monitoring resource usage of system all add-ons in (some) e2e tests, if set to 'master' framework will be monitoring master node only, if set to 'none' of 'false' monitoring will be turned off.")
	flag.BoolVar(&TestContext.GatherLogsSizes, "gather-logs-sizes", false, "If set to true framework will be monitoring logs sizes on all machines running e2e tests.")
	flag.BoolVar(&TestContext.GatherMetricsAfterTest, "gather-metrics-at-teardown", false, "If set to true framwork will gather metrics from all components after each test.")
	flag.StringVar(&TestContext.OutputPrintType, "output-print-type", "hr", "Comma separated list: 'hr' for human readable summaries 'json' for JSON ones.")
	flag.BoolVar(&TestContext.DumpLogsOnFailure, "dump-logs-on-failure", true, "If set to true test will dump data about the namespace in which test was running.")
}

// Register flags specific to the cluster e2e test suite.
func RegisterClusterFlags() {
	// TODO: Move to common flags once namespace deletion is fixed for node e2e.
	flag.BoolVar(&TestContext.DeleteNamespace, "delete-namespace", true, "If true tests will delete namespace after completion. It is only designed to make debugging easier, DO NOT turn it off by default.")

	flag.BoolVar(&TestContext.VerifyServiceAccount, "e2e-verify-service-account", true, "If true tests will verify the service account before running.")
	flag.StringVar(&TestContext.KubeConfig, clientcmd.RecommendedConfigPathFlag, os.Getenv(clientcmd.RecommendedConfigPathEnvVar), "Path to kubeconfig containing embedded authinfo.")
	flag.StringVar(&TestContext.KubeContext, clientcmd.FlagContext, "", "kubeconfig context to use/override. If unset, will use value from 'current-context'")
	flag.StringVar(&TestContext.KubeAPIContentType, "kube-api-content-type", "", "ContentType used to communicate with apiserver")
	flag.StringVar(&federatedKubeContext, "federated-kube-context", "federation-cluster", "kubeconfig context for federation-cluster.")

	flag.StringVar(&TestContext.KubeVolumeDir, "volume-dir", "/var/lib/kubelet", "Path to the directory containing the kubelet volumes.")
	flag.StringVar(&TestContext.CertDir, "cert-dir", "", "Path to the directory containing the certs. Default is empty, which doesn't use certs.")
	flag.StringVar(&TestContext.Host, "host", "", "The host, or apiserver, to connect to")
	flag.StringVar(&TestContext.RepoRoot, "repo-root", "../../", "Root directory of kubernetes repository, for finding test files.")
	flag.StringVar(&TestContext.Provider, "provider", "", "The name of the Kubernetes provider (gce, gke, local, vagrant, etc.)")
	flag.StringVar(&TestContext.KubectlPath, "kubectl-path", "kubectl", "The kubectl binary to use. For development, you might use 'cluster/kubectl.sh' here.")
	flag.StringVar(&TestContext.OutputDir, "e2e-output-dir", "/tmp", "Output directory for interesting/useful test data, like performance data, benchmarks, and other metrics.")
	flag.StringVar(&TestContext.ReportDir, "report-dir", "", "Path to the directory where the JUnit XML reports should be saved. Default is empty, which doesn't generate these reports.")
	flag.StringVar(&TestContext.ReportPrefix, "report-prefix", "", "Optional prefix for JUnit XML reports. Default is empty, which doesn't prepend anything to the default name.")
	flag.StringVar(&TestContext.Prefix, "prefix", "e2e", "A prefix to be added to cloud resources created during testing.")
	flag.StringVar(&TestContext.OSDistro, "os-distro", "debian", "The OS distribution of cluster VM instances (debian, trusty, or coreos).")
	flag.StringVar(&TestContext.ContainerRuntime, "container-runtime", "docker", "The container runtime of cluster VM instances (docker or rkt).")

	// TODO: Flags per provider?  Rename gce-project/gce-zone?
	cloudConfig := &TestContext.CloudConfig
	flag.StringVar(&cloudConfig.MasterName, "kube-master", "", "Name of the kubernetes master. Only required if provider is gce or gke")
	flag.StringVar(&cloudConfig.ProjectID, "gce-project", "", "The GCE project being used, if applicable")
	flag.StringVar(&cloudConfig.Zone, "gce-zone", "", "GCE zone being used, if applicable")
	flag.StringVar(&cloudConfig.ServiceAccount, "gce-service-account", "", "GCE service account to use for GCE API calls, if applicable")
	flag.StringVar(&cloudConfig.Cluster, "gke-cluster", "", "GKE name of cluster being used, if applicable")
	flag.StringVar(&cloudConfig.NodeInstanceGroup, "node-instance-group", "", "Name of the managed instance group for nodes. Valid only for gce, gke or aws. If there is more than one group: comma separated list of groups.")
	flag.IntVar(&cloudConfig.NumNodes, "num-nodes", -1, "Number of nodes in the cluster")

	flag.StringVar(&cloudConfig.ClusterTag, "cluster-tag", "", "Tag used to identify resources.  Only required if provider is aws.")
	flag.IntVar(&TestContext.MinStartupPods, "minStartupPods", 0, "The number of pods which we need to see in 'Running' state with a 'Ready' condition of true, before we try running tests. This is useful in any cluster which needs some base pod-based services running before it can be used.")
	flag.DurationVar(&TestContext.SystemPodsStartupTimeout, "system-pods-startup-timeout", 10*time.Minute, "Timeout for waiting for all system pods to be running before starting tests.")
	flag.StringVar(&TestContext.UpgradeTarget, "upgrade-target", "ci/latest", "Version to upgrade to (e.g. 'release/stable', 'release/latest', 'ci/latest', '0.19.1', '0.19.1-669-gabac8c8') if doing an upgrade test.")
	flag.StringVar(&TestContext.PrometheusPushGateway, "prom-push-gateway", "", "The URL to prometheus gateway, so that metrics can be pushed during e2es and scraped by prometheus. Typically something like 127.0.0.1:9091.")
	flag.BoolVar(&TestContext.CleanStart, "clean-start", false, "If true, purge all namespaces except default and system before running tests. This serves to Cleanup test namespaces from failed/interrupted e2e runs in a long-lived cluster.")
}

// Register flags specific to the node e2e test suite.
func RegisterNodeFlags() {
	flag.StringVar(&TestContext.NodeName, "node-name", "", "Name of the node to run tests on (node e2e suite only).")
}