#! /bin/bash
# Copyright 2021 Google LLC
#
# 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.

# DEPLOYSTACK - this file is a test script that is used by DeployStack's
# testing rig to make sure that the Terraform script installs and uninstalls
# cleanly

# DON'T REMOVE FROM test script.

CYAN='\033[0;36m'
BCYAN='\033[1;36m'
NC='\033[0m' # No Color
DIVIDER=$(printf %"$(tput cols)"s | tr " " "*")
DIVIDER+="\n"

function get_project_id() {
    local __resultvar=$1
    VALUE=$(gcloud config get-value project | xargs)
    eval $__resultvar="'$VALUE'"
}

function get_project_number() {
    local __resultvar=$1
    local PRO=$2
    VALUE=$(gcloud projects list --filter="project_id=$PRO" --format="value(PROJECT_NUMBER)" | xargs)
    eval $__resultvar="'$VALUE'"
}

# DISPLAY HELPERS

function section_open() {
    section_description=$1
    printf "$DIVIDER"
    printf "${CYAN}$section_description${NC} \n"
    printf "$DIVIDER"
}

function section_close() {
    printf "$DIVIDER"
    printf "${CYAN}$section_description ${BCYAN}- done${NC}\n"
    printf "\n\n"
}

function evalTest() {
    local command=$1
    local expected=$2

    local ERR=""
    got=$(eval $command 2>errFile)
    ERR=$(<errFile)

    if [ ${#ERR} -gt 0 ]; then
        if [ "$expected" = "EXPECTERROR" ]; then
            printf "ok \n"
            return
        fi

        printf "expecting no error, got error='$ERR'   \n"
        exit 1
    fi

    if [ "$got" != "$expected" ]; then
        printf "expecting: '$expected' got: '$got'  \n"
        exit 1
    fi

    printf "$expected is ok\n"
}

function generateProject(){
    local __resultvar
    local __STACKSUFFIX
    local __BA
    local __RANDOMSUFFIX
    local __DATELABEL
    local PROJECTID
    local current


    __resultvar=$1
    __STACKSUFFIX=$2
    __BA=$3
    __RANDOMSUFFIX=$(
        LC_ALL=C tr -dc 'a-z0-9' </dev/urandom | head -c 8
        echo
    )
    __DATELABEL=$(date +%F)
    PROJECTID=ds-test-$__STACKSUFFIX-$__RANDOMSUFFIX
    current=$(gcloud config list account --format "value(core.account)")
    # shellcheck disable=SC2034
    GOOGLE_APPLICATION_CREDENTIALS=.deploystack/creds.json

    gcloud projects create "$PROJECTID" --labels="deploystack-disposable-test-project=$__DATELABEL" --folder="155265971980"
    
    gcloud auth activate-service-account --project="$PROJECTID" --key-file=.deploystack/creds.json -q
    gcloud config set account test-runner@ds-tester-helper.iam.gserviceaccount.com -q

    gcloud beta billing projects link "$PROJECTID" --billing-account="$__BA" -q
    gcloud config set account "$current" -q
    eval "$__resultvar"="'$PROJECTID'"
    
}

# END DON'T REMOVE FROM test script.

suffix=ms

# This is only needed if you tests fail alot because of overlapping runs of the
# same set of tests.
section_open "Generate random test project"
    generateProject PROJECT "$suffix" "$BA"
section_close

# We need to force the use of gke-gcloud-auth-plugin (for GKE authentication)
# if we're using kubectl 1.25 or lower.
export USE_GKE_GCLOUD_AUTH_PLUGIN=True

DIR="terraform"
gcloud services enable cloudresourcemanager.googleapis.com --project=$PROJECT
REGION="us-central1"
NAME="online-boutique"
NAMESPACE="default"
FILEPATH_MANIFEST="../kustomize/"
MEMORYSTORE="false"

gcloud config set project ${PROJECT}

terraform -chdir="$DIR" init
terraform -chdir="$DIR" apply -auto-approve \
    -var gcp_project_id="${PROJECT}" \
    -var name="${NAME}" \
    -var region="${REGION}" \
    -var namespace="${NAMESPACE}"  \
    -var filepath_manifest="${FILEPATH_MANIFEST}" \
    -var memorystore="${MEMORYSTORE}"

section_open "Testing Google Kubernetes Engine cluster exists"
    evalTest 'gcloud container clusters describe online-boutique --format="value(name)" --region $REGION' "online-boutique"
section_close

section_open "Testing Online Boutique's services are running"
    evalTest "kubectl get deployment adservice --no-headers -o=name 2> /dev/null"  "deployment.apps/adservice"
    evalTest "kubectl get deployment cartservice --no-headers -o=name 2> /dev/null"  "deployment.apps/cartservice"
    evalTest "kubectl get deployment checkoutservice --no-headers -o=name 2> /dev/null"  "deployment.apps/checkoutservice"
    evalTest "kubectl get deployment currencyservice --no-headers -o=name 2> /dev/null"  "deployment.apps/currencyservice"
    evalTest "kubectl get deployment emailservice --no-headers -o=name 2> /dev/null"  "deployment.apps/emailservice"
    evalTest "kubectl get deployment loadgenerator --no-headers -o=name 2> /dev/null"  "deployment.apps/loadgenerator"
    evalTest "kubectl get deployment paymentservice --no-headers -o=name 2> /dev/null"  "deployment.apps/paymentservice"
    evalTest "kubectl get deployment productcatalogservice --no-headers -o=name 2> /dev/null"  "deployment.apps/productcatalogservice"
    evalTest "kubectl get deployment recommendationservice --no-headers -o=name 2> /dev/null"  "deployment.apps/recommendationservice"
    evalTest "kubectl get deployment redis-cart --no-headers -o=name 2> /dev/null"  "deployment.apps/redis-cart"
    evalTest "kubectl get deployment shippingservice --no-headers -o=name 2> /dev/null"  "deployment.apps/shippingservice"
section_close

sleep 120

ENDPOINT=$( kubectl get service frontend-external --no-headers 2> /dev/null | awk '{print $4}')

section_open "Testing Online Boutique's front-end is working"
    evalTest 'curl -s -o /dev/null -w "%{http_code}" $ENDPOINT' "200"
section_close

# Uncomment the line: "deletion_protection = false"
sed -i "s/# deletion_protection/deletion_protection/g" ${DIR}/main.tf
terraform -chdir="$DIR" apply -auto-approve \
    -var gcp_project_id="${PROJECT}" \
    -var name="${NAME}" \
    -var region="${REGION}" \
    -var namespace="${NAMESPACE}"  \
    -var filepath_manifest="${FILEPATH_MANIFEST}" \
    -var memorystore="${MEMORYSTORE}"

terraform -chdir="$DIR" destroy -auto-approve \
    -var gcp_project_id="${PROJECT}" \
    -var name="${NAME}" \
    -var region="${REGION}" \
    -var namespace="${NAMESPACE}"  \
    -var filepath_manifest="${FILEPATH_MANIFEST}" \
    -var memorystore="${MEMORYSTORE}"

section_open "Testing Google Kubernetes Engine cluster does NOT exist"
    evalTest 'gcloud container clusters describe online-boutique --format="value(name)" --region $REGION' "EXPECTERROR"
section_close

# This is only needed if you tests fail alot because of overlapping runs of the
# same set of tests. Really don't do this if you don't want to severely irritate
# @tpryan
section_open "Delete Test Project"
    gcloud projects delete $PROJECT -q
section_close

printf "$DIVIDER"
printf "CONGRATS!!!!!!! \n"
printf "You got the end the of your test with everything working. \n"
printf "$DIVIDER"