#!/usr/bin/env bash

# This script runs e2e tests for Canary initialization, analysis and promotion
# Prerequisites: Kubernetes Kind, Helm and NGINX ingress controller

set -o errexit

REPO_ROOT=$(git rev-parse --show-toplevel)
export KUBECONFIG="$(kind get kubeconfig-path --name="kind")"

echo '>>> Creating test namespace'
kubectl create namespace test

echo '>>> Installing load tester'
kubectl -n test apply -f ${REPO_ROOT}/artifacts/loadtester/
kubectl -n test rollout status deployment/flagger-loadtester

echo '>>> Initialising canary'
kubectl apply -f ${REPO_ROOT}/test/e2e-workload.yaml

cat <<EOF | kubectl apply -f -
apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: podinfo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - '*'
    name: podinfo
    routes:
      - matcher:
          prefix: /
        routeAction:
          upstreamGroup:
            name: podinfo
            namespace: test
EOF

cat <<EOF | kubectl apply -f -
apiVersion: flagger.app/v1alpha3
kind: Canary
metadata:
  name: podinfo
  namespace: test
spec:
  targetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: podinfo
  progressDeadlineSeconds: 60
  service:
    port: 9898
  canaryAnalysis:
    interval: 15s
    threshold: 15
    maxWeight: 50
    stepWeight: 10
    metrics:
    - name: request-success-rate
      threshold: 99
      interval: 1m
    webhooks:
      - name: load-test
        url: http://flagger-loadtester.test/
        timeout: 5s
        metadata:
          type: cmd
          cmd: "hey -z 10m -q 10 -c 2 -host app.example.com http://gateway-proxy.gloo-system"
          logCmdOutput: "true"
EOF

echo '>>> Waiting for primary to be ready'
retries=50
count=0
ok=false
until ${ok}; do
    kubectl -n test get canary/podinfo | grep 'Initialized' && ok=true || ok=false
    sleep 5
    count=$(($count + 1))
    if [[ ${count} -eq ${retries} ]]; then
        kubectl -n gloo-system logs deployment/flagger
        echo "No more retries left"
        exit 1
    fi
done

echo '✔ Canary initialization test passed'

echo '>>> Triggering canary deployment'
kubectl -n test set image deployment/podinfo podinfod=quay.io/stefanprodan/podinfo:1.4.1

echo '>>> Waiting for canary promotion'
retries=50
count=0
ok=false
until ${ok}; do
    kubectl -n test describe deployment/podinfo-primary | grep '1.4.1' && ok=true || ok=false
    sleep 10
    kubectl -n gloo-system logs deployment/flagger --tail 1
    count=$(($count + 1))
    if [[ ${count} -eq ${retries} ]]; then
        kubectl -n test describe deployment/podinfo
        kubectl -n test describe deployment/podinfo-primary
        kubectl -n gloo-system logs deployment/flagger
        kubectl -n gloo-system get virtualservice podinfo -oyaml
        echo "No more retries left"
        exit 1
    fi
done

echo '✔ Canary promotion test passed'
