#!/usr/bin/env bash

KUBECTL_URL="https://storage.googleapis.com/kubernetes-release/release"
KUBERNETES_VERSION=1.13.0
MINIKUBE_VERSION=0.28.1
ETCD_VERSION=3.3.10
FLANNEL_VERSION=0.10.0

# HELM_SERVICES=("redis" "mysql" "nginx-php" "registry")

################################################################################

if ! [ -f lnmp-k8s ];then if ! [ -z "$LNMP_PATH" ];then cd $LNMP_PATH/kubernetes; else exit; fi; fi

source_path=$PWD

if ! [ -f .env ];then cp .env.example .env; fi
if ! [ -f coreos/.env ];then cp coreos/.env.example coreos/.env; fi

source ./.env.example
source ./.env

set -e

os=`uname -s`

print_help_info(){
  echo "
Usage: lnmp-k8s COMMAND

Commands:
  kubernetes-server  Download kubernetes server files

  kubectl-install    Install kubectl
  kubectl-getinfo    Get kubectl latest version info

  minikube-install   Install minikube
  minikube           Start minikube

  single-install     Install Local Kubernetes（Manager by systemd）
  single-start       Print how to start Local Kubernetes (Manager by systemd)
  single-cleanup     Cleanup Kubernetes Env.

  create             Deploy lnmp on k8s
  delete             Stop lnmp on k8s, keep data resource(pv and pvc)
  cleanup            Stop lnmp on k8s, and remove all resource(pv and pvc)

  registry           Up Registry

  create-pv          Create PV and PVC

  helm-development   Install Helm LNMP In Development
  helm-testing       Install Helm LNMP In Testing
  helm-staging       Install Helm LNMP In Staging
  helm-production    Install Helm LNMP In Production

  dashboard          How to open Dashboard
"
}

if ! [ -f systemd/.env ];then
  cp systemd/.env.example systemd/.env
fi

_kubernetes_server(){

echo "install kubernetes"

cd coreos

if ! [ -d kubernetes-release/release/v${KUBERNETES_VERSION} ];then
  command -v docker
  if [ $? -eq 0 ];then
    docker container ls > /dev/null 2>&1
    mkdir -p kubernetes-release/release/v${KUBERNETES_VERSION}
    mkdir -p kubernetes-release/release/v${KUBERNETES_VERSION}/kubernetes

    docker container rm khs1994-coreos-kubernetes > /dev/null 2>&1 || echo > /dev/null
    docker container create --name khs1994-coreos-kubernetes \
      ccr.ccs.tencentyun.com/khs1994/kubernetes:v${KUBERNETES_VERSION}
    docker container cp khs1994-coreos-kubernetes:/srv.tar.gz kubernetes-release/release
    docker container rm khs1994-coreos-kubernetes

    cd kubernetes-release/release
    tar -zxvf srv.tar.gz
    cd srv
    tar -zxvf kubernetes-server-linux-amd64.tar.gz
    # srv/kubernetes
    cd ..
    mv srv/kubernetes v${KUBERNETES_VERSION}/
    rm -rf srv
    mv srv.tar.gz kubernetes-server-linux-amd64-v${KUBERNETES_VERSION}.tar.gz
  fi
fi
}

_delete(){
  kubectl delete deployment -l app=lnmp -n lnmp
  kubectl delete service -l app=lnmp -n lnmp
  kubectl delete secret -l app=lnmp -n lnmp
  kubectl delete configmap -l app=lnmp -n lnmp

  kubectl delete cronjob -l app=lnmp -n lnmp
}

_minikube(){
  if [ `uname -s` = 'Darwin' ];then
    minikube start \
      -v 10 \
      --registry-mirror=https://registry.docker-cn.com \
      --vm-driver="hyperkit" \
      --memory=4096
  else
    minikube start \
      -v 10 \
      --registry-mirror=https://registry.docker-cn.com \
      --vm-driver="none"
  fi
}

_minikube-install(){
  if [ $os = 'Linux' ];then
    url=http://kubernetes.oss-cn-hangzhou.aliyuncs.com/minikube/releases/v${MINIKUBE_VERSION}/minikube-linux-amd64
  elif [ $os = 'Darwin' ];then
    url=http://kubernetes.oss-cn-hangzhou.aliyuncs.com/minikube/releases/v${MINIKUBE_VERSION}/minikube-darwin-amd64
  fi

  curl -L $url -o minikube

  chmod +x minikube

  sudo mv minikube /usr/local/bin/ || echo "Please move minikube to your PATH"
}

_cleanup(){
  _delete
  kubectl delete pvc -l app=lnmp -n lnmp
  kubectl delete pv -l app=lnmp -n lnmp
  kubectl delete ingress -l app=lnmp -n lnmp
}

_create_pv(){
  if [ "$os" = 'Linux' ];then
    # sed "s#/home/username#$HOME#g" deployment/lnmp-volume.linux.example.yaml \
    # | kubectl create -f -
    kubectl create -f deployment/lnmp-volume.linux.nfs.yaml
    kubectl -n lnmp create -f deployment/lnmp-pvc.linux.nfs.yaml
  elif [ "$os" = 'Darwin' ];then
    sed "s#/Users/username#$HOME#g" deployment/lnmp-volume.macos.example.yaml \
    | kubectl create -f -

    kubectl -n lnmp create -f deployment/lnmp-pvc.yaml
  fi
}

_registry(){
  kubectl -n lnmp create configmap lnmp-registry-conf-0.0.1 --from-file=config.yml=helm/registry/config/config.development.yml
  kubectl -n lnmp label configmap lnmp-registry-conf-0.0.1 app=lnmp version=0.0.1

  kubectl -n lnmp create secret generic lnmp-registry-tls-0.0.1 --from-file=tls.crt=helm/registry/config/ssl/public.crt \
      --from-file=tls.key=helm/registry/config/ssl/private.key
  kubectl -n lnmp label secret lnmp-registry-tls-0.0.1 app=lnmp version=0.0.1

  kubectl -n lnmp create -f addons/registry.yaml
}

_create(){
  current_context=`kubectl config current-context`

  if [ $current_context != "docker-for-desktop" -a $os = 'Darwin' ];then
     echo "This Script Support Docker for Desktop Only"
     exit
  fi

  kubectl create namespace lnmp > /dev/null 2>&1 || echo > /dev/null

  _create_pv

  kubectl -n lnmp create configmap lnmp-php-conf-0.0.1 \
             --from-file=php.ini=helm/nginx-php/config/php/ini/php.development.ini \
                     --from-file=helm/nginx-php/config/php/docker-xdebug.ini \
      --from-file=zz-docker.conf=helm/nginx-php/config/php/zz-docker.development.conf \
--from-file=composer.config.json=helm/nginx-php/config/php/composer/config.development.json \
          --from-file=docker.ini=helm/nginx-php/config/php/conf.d/docker.development.ini
  kubectl -n lnmp label configmap lnmp-php-conf-0.0.1 app=lnmp version=0.0.1

  kubectl -n lnmp create configmap lnmp-mysql-cnf-0.0.1 \
   --from-file=docker.cnf=helm/mysql/config/docker.development.cnf
  kubectl -n lnmp label configmap lnmp-mysql-cnf-0.0.1 app=lnmp version=0.0.1

  kubectl -n lnmp create configmap lnmp-nginx-conf-0.0.1 \
   --from-file=nginx.conf=helm/nginx-php/config/nginx/nginx.development.conf
  kubectl -n lnmp label configmap lnmp-nginx-conf-0.0.1 app=lnmp version=0.0.1

  kubectl -n lnmp create configmap lnmp-nginx-conf-d-0.0.1 --from-file=deployment/configMap/nginx-conf-d
  kubectl -n lnmp label configmap lnmp-nginx-conf-d-0.0.1 app=lnmp version=0.0.1

  kubectl -n lnmp create -f deployment/lnmp-configMap.yaml

  kubectl -n lnmp create -f deployment/lnmp-secret.yaml

  kubectl -n lnmp create -f deployment/lnmp-mysql.yaml

  kubectl -n lnmp create -f deployment/lnmp-redis.yaml

  kubectl -n lnmp create -f deployment/lnmp-php7.yaml

  if [ "$os" = 'Linux' ];then
    kubectl -n lnmp create -f deployment/lnmp-nginx.service.linux.yaml
  elif [ "$os" = 'Darwin' ];then
    kubectl -n lnmp create -f deployment/lnmp-nginx.service.yaml
  fi

  kubectl -n lnmp create -f deployment/lnmp-nginx.yaml
}

kubectl-install(){
  if [ $os = 'Linux' ];then
    command -v docker
    if [ $? -eq 0 ];then
      docker container rm -f khs1994-kubectl > /dev/null 2>&1 || echo > /dev/null
      docker container create --name=khs1994-kubectl khs1994/coreos:cert
      docker container cp khs1994-kubectl:/usr/local/bin/kubectl .
      docker container rm -f khs1994-kubectl
      sudo mv kubectl /usr/local/bin
      kubectl version
      return
    fi
  fi

  KUBECTL_VERSION=$(curl https://storage.googleapis.com/kubernetes-release/release/stable.txt)

  if [ $OS = 'Linux' ];then
    curl -L ${KUBECTL_URL}/${KUBECTL_VERSION}/bin/linux/amd64/kubectl > kubectl-Linux-x86_64
    sudo mv kubectl-Linux-x86_64 /usr/local/bin/kubectl
  elif [ $OS = 'Darwin' ];then
    curl -L ${KUBECTL_URL}/${KUBECTL_VERSION}/bin/darwin/amd64/kubectl > kubectl-Darwin-x86_64
    sudo mv kubectl-Darwin-x86_64 /usr/local/bin/kubectl
  fi

  kubectl version
}

kubectl-getinfo(){
  echo "kubectl latest version is
  "
  curl https://storage.googleapis.com/kubernetes-release/release/stable.txt
}

_etcd(){
  if ! [ -f /opt/bin/etcd ];then
      cd /opt/bin
      rm -rf etcd-v${ETCD_VERSION}-linux-amd64.tar.gz
      sudo wget https://github.com/etcd-io/etcd/releases/download/v${ETCD_VERSION}/etcd-v${ETCD_VERSION}-linux-amd64.tar.gz
      sudo tar -zxvf etcd-v${ETCD_VERSION}-linux-amd64.tar.gz
      sudo mv etcd-v${ETCD_VERSION}-linux-amd64/etcd* ./
      sudo rm -rf *.tar.gz
      cd -
      return
  fi

  echo "etcd already install"
}

_flanneld(){
  if ! [ -f /opt/bin/flanneld ];then
    sudo curl -fsSL https://github.com/coreos/flannel/releases/download/v${FLANNEL_VERSION}/flanneld-amd64 -o /opt/bin/flanneld
    return
  fi

  echo "flanneld already install"
}

_k8s_install(){
  # 安装依赖软件
  command -v dnf && sudo dnf install -y conntrack ipvsadm ipset jq iptables curl \
    sysstat libseccomp && sudo /usr/sbin/modprobe ip_vs

  command -v yum && sudo yum install -y conntrack ipvsadm ipset jq iptables curl \
    sysstat libseccomp && sudo /usr/sbin/modprobe ip_vs

  command -v apt && sudo apt install -y conntrack ipvsadm ipset jq iptables curl \
    sysstat libseccomp && sudo /usr/sbin/modprobe ip_vs

  # 关闭防火墙
  sudo systemctl stop firewalld && sudo systemctl disable firewalld
  sudo mkdir -p /opt/bin
  _etcd
  _flanneld

  sudo mkdir -p /etc/kubernetes/certs

  sudo cp systemd/*.service /etc/systemd/system/
  sudo cp systemd/certs/*.pem /etc/kubernetes/certs/
  sudo cp coreos/disk/bin/*.sh /opt/bin/

  sudo chmod +x /opt/bin/*

  if ! [ -f systemd/certs/admin-key.pem ];then \
    echo "Please Generate certs first $ docker-compose up cfssl-single"; exit; fi

  if ! [ -f /opt/bin/kubeadm ];then
    _kubernetes_server
    cd $source_path
    sudo cp $PWD/coreos/kubernetes-release/release/v${KUBERNETES_VERSION}/kubernetes/server/bin/* /opt/bin/ || \
    rm -rf $PWD/coreos/kubernetes-release/release/v${KUBERNETES_VERSION}
    cd $source_path
    sudo cp $PWD/coreos/kubernetes-release/release/v${KUBERNETES_VERSION}/kubernetes/server/bin/* /opt/bin/
  fi

  sudo chmod +x /opt/bin/*

  sudo cp systemd/certs/*.kubeconfig /etc/kubernetes/

  sudo cp systemd/kubelet.config.json systemd/kube-proxy.config.yaml /etc/kubernetes/
  sudo cp coreos/disk/system/csr-crb.yaml /etc/kubernetes/

  source systemd/.env.example

  sudo cp systemd/encryption-config.yaml /etc/kubernetes/encryption-config.yaml

  sudo sed -i "s#ENCRYPTION_KEY#${ENCRYPTION_KEY}#g" /etc/kubernetes/encryption-config.yaml

  sudo mkdir -p /etc/systemd/system/docker.service.d

  sudo cp systemd/docker.conf /etc/systemd/system/docker.service.d/

  sudo systemctl daemon-reload

  sudo useradd -m -s /bin/bash -G root k8s > /dev/null 2>&1 || echo > /dev/null

  # sudo rm -rf /var/log/kubernetes /var/log/kube-apiserver-audit.log

  sudo mkdir --parents /var/log/kubernetes
  sudo mkdir --parents /var/lib/kubelet
  sudo mkdir -p /var/lib/kube-proxy

  sudo chown k8s:root /var/log/kubernetes

  sudo touch /var/log/kube-apiserver-audit.log
  sudo chown k8s:root /var/log/kube-apiserver-audit.log

  sudo mkdir -p /home/k8s/.kube
  sudo cp systemd/certs/kubectl.kubeconfig /home/k8s/.kube/config

}

_k8s_start(){
  sudo systemctl start kube-apiserver kube-controller-manager kube-scheduler \
                       kube-proxy kubelet
}

if [ -z "$1" ];then
  print_help_info
  exit
fi

_helm(){
  cd helm
  lnmp_app_env=$1

  if [ "--debug" = "$2" ];then opt="--dry-run --debug"; fi
  set +e
  for service in ${HELM_SERVICES[@]}
  do
    helm install ./$service \
        --name lnmp-$service-${lnmp_app_env} \
        --namespace lnmp-${lnmp_app_env} \
        --set APP_ENV=${lnmp_app_env} \
        --set platform=$(uname -s) \
        --set username=$(whoami) \
        --tls $opt
  done
}

_single_start(){
  echo "
$ sudo systemctl start etcd
$ sudo systemctl start flanneld
$ sudo systemctl start docker
$ sudo systemctl start kube-apiserver
$ sudo systemctl start kube-controller-manager
$ sudo systemctl start kube-scheduler
$ sudo systemctl start kube-proxy
$ sudo systemctl start kubelet
"
}

_single_cleanup(){
  sudo systemctl stop etcd flanneld docker kube-apiserver \
    kube-controller-manager kube-scheduler kube-proxy kubelet docker

  sudo rm -rf /opt/bin
  sudo rm -rf /var/lib/etcd
  sudo rm -rf /var/log/ku*
  sudo rm -rf /var/lib/kubelet
  sudo rm -rf /var/lib/kube-proxy

  sudo rm -rf /etc/kubernetes
}

case $1 in
    kubernetes_server )
      _kubernetes_server
      ;;
    kubectl-install )
      kubectl-install
    ;;
    kubectl-getinfo )
      kubectl-getinfo
    ;;

    create )
      _create
    ;;

    delete )
      set +e
      _delete
    ;;

    cleanup )
      set +e
      _cleanup
    ;;

    registry )
      set +e
      _create_pv
      _registry
    ;;

    create-pv )
      _create_pv
    ;;

    single-install )
      _k8s_install
    ;;

    single-start )
      _single_start
    ;;

    single-cleanup )

      _single_cleanup
    ;;

    minikube )
      _minikube
    ;;

    minikube-install )
      _minikube-install
    ;;

    helm-development )
    shift
    _helm development "$@"
    ;;
    helm-testing )
    shift
    _helm testing "$@"
    ;;
    helm-staging )
    shift
    _helm staging "$@"
    ;;
    helm-production )
    shift
    _helm production "$@"
    ;;

    dashboard )
      echo "
$ kubectl proxy

open http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/

"
    ;;

    * )
    echo "command not found"
    ;;
esac