#!/bin/bash

#Setup a cloud-config directory with all of my yamls for each environment
source cloud-config/$1/.env

#A simple way to increment my version number
increment_version ()
{
  declare -a part=( ${1//\-/ } )
  declare    new
  declare -i carry=1

  for (( CNTR=${#part[@]}-1; CNTR>=0; CNTR-=1 )); do
    len=${#part[CNTR]}
    new=$((part[CNTR]+carry))
    [ ${#new} -gt $len ] && carry=1 || carry=0
    [ $CNTR -gt 0 ] && part[CNTR]=${new: -len} || part[CNTR]=${new}
  done
  new="${part[*]}"
  newversion="${new// /-}"
} 

#My Verions
newversion=''
version=$(cat "version.txt") 
increment_version $version

#This is important to break if the docker build breaks
set -xe

#Determine if I need to create the cluster or update the deployment image
export createcluster=${2:-"N"}
export TAG=$newversion

#Writes out where it is about to go
echo Project: $PROJECTID
echo Environment: $ENV
echo TAG: $TAG

# Are YOU SURE?!
read -p "Do you wish to continue? [y/N]" -n 1 -r
echo    # (optional) move to a new line

if [[ $REPLY =~ ^[Yy]$ ]]
then
	#Docker Build  - I don't use cloud build
    echo Docker Build
	docker build --build-arg docker_env=$ENV --build-arg tag=$TAG-$ENV -t my-app .

	#Docker Tag latest and new version number
	docker tag my-app:latest gcr.io/$PROJECTID/my-app-$ENV:$TAG
	docker tag my-app:latest gcr.io/$PROJECTID/my-app-$ENV:latest
	
	#Docker Push to gcr repo
	docker push gcr.io/$PROJECTID/my-app-$ENV:$TAG
	docker push gcr.io/$PROJECTID/my-app-$ENV:latest
	
	#Make sure the project and zone and region are configured correctly
	gcloud config set project $PROJECTID
	gcloud config set compute/zone $ZONE
	gcloud config set compute/region $REGION
	
	#If you need to create a new cluster, then TADA
	if [[ $createcluster =~ [Yy]$ ]]
	then
		if [[ $ENV =~ [staging]$ ]] 
		then
			gcloud container --project "$PROJECTID" clusters create "my-app-cluster-$ENV" --zone "$ZONE" --username "admin" --cluster-version "1.11.7-gke.12" --machine-type "n1-standard-2" --image-type "COS" --disk-type "pd-standard" --disk-size "100" --scopes "https://www.googleapis.com/auth/cloud-platform" --num-nodes "3" --enable-cloud-logging --enable-cloud-monitoring --no-enable-ip-alias --network "projects/$PROJECTID/global/networks/default" --subnetwork "projects/$PROJECTID/regions/$REGION/subnetworks/default" --addons HorizontalPodAutoscaling,HttpLoadBalancing --enable-autoupgrade --enable-autorepair --enable-autoscaling --min-nodes 3 --max-nodes 6
		else
			gcloud container --project "$PROJECTID" clusters create "my-app-cluster-$ENV" --zone "$ZONE" --username "admin" --cluster-version "1.11.7-gke.12" --machine-type "n1-standard-1" --image-type "COS" --disk-type "pd-standard" --disk-size "100" --scopes "https://www.googleapis.com/auth/cloud-platform" --num-nodes "2" --enable-cloud-logging --enable-cloud-monitoring --no-enable-ip-alias --network "projects/$PROJECTID/global/networks/default" --subnetwork "projects/$PROJECTID/regions/$REGION/subnetworks/default" --addons HorizontalPodAutoscaling,HttpLoadBalancing --enable-autorepair --enable-autoscaling --min-nodes 1 --max-nodes 4
		fi
		curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get > get_helm.sh
		chmod 700 get_helm.sh
		./get_helm.sh
		kubectl create namespace $ENV
		helm init --tiller-namespace $ENV
		kubectl create serviceaccount --namespace $ENV tiller
		kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=$ENV:tiller
		helm init --service-account tiller --tiller-namespace $ENV --upgrade
		kubectl create -f cloud-config/$ENV/app-deploy.yaml  
		kubectl expose deployment my-app-app-$ENV --port=8087 --namespace $ENV
		kubectl autoscale deployment my-app-app-$ENV --max 6 --min 2 --cpu-percent 50 -n $ENV
		kubectl create secret tls tls-secret-$ENV --key your-domain.com.key --cert your-domain.com.crt -n $ENV   
		kubectl apply -f cloud-config/$ENV/ingress-nginx.yaml
		echo $newversion > version.txt
		echo waiting for tiller to become live
		kubectl get pods -n $ENV
		sleep 20
		helm install --name nginx-ingress-my-app-$ENV stable/nginx-ingress --set rbac.create=true --tiller-namespace $ENV
		kubectl apply -f cloud-config/$ENV/controller-nginx.yaml
	else # You are only updating with the new deployment
		gcloud container clusters get-credentials my-app-cluster-$ENV
		kubectl set image deployment/my-app-app-$ENV my-app-app-$ENV=gcr.io/$PROJECTID/my-app-$ENV:$TAG --namespace $ENV
		echo $newversion > version.txt
	fi
fi