#!/bin/bash

# 配置參數
NAMESPACE="my-app"
FRONTEND_IMAGE="my-frontend:latest"
BACKEND_IMAGE="my-backend:latest"
DB_IMAGE="mysql:5.7"
DB_ROOT_PASSWORD="mysecretpassword"

# 創建命名空間
kubectl create namespace $NAMESPACE

# 部署MySQL數據庫
kubectl apply -f - <<EOF
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
  namespace: $NAMESPACE
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
---
apiVersion: v1
kind: Service
metadata:
  name: mysql
  namespace: $NAMESPACE
spec:
  ports:
    - port: 3306
  selector:
    app: mysql
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
  namespace: $NAMESPACE
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - image: $DB_IMAGE
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: $DB_ROOT_PASSWORD
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim
EOF

# 部署后端服務
kubectl apply -f - <<EOF
apiVersion: v1
kind: Service
metadata:
  name: backend
  namespace: $NAMESPACE
spec:
  ports:
    - port: 80
      targetPort: 8080
  selector:
    app: backend
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: backend
  namespace: $NAMESPACE
spec:
  selector:
    matchLabels:
      app: backend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: backend
    spec:
      containers:
      - image: $BACKEND_IMAGE
        name: backend
        ports:
        - containerPort: 8080
EOF

# 部署前端服務
kubectl apply -f - <<EOF
apiVersion: v1
kind: Service
metadata:
  name: frontend
  namespace: $NAMESPACE
spec:
  type: LoadBalancer
  ports:
    - port: 80
      targetPort: 80
  selector:
    app: frontend
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: frontend
  namespace: $NAMESPACE
spec:
  selector:
    matchLabels:
      app: frontend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: frontend
    spec:
      containers:
      - image: $FRONTEND_IMAGE
        name: frontend
        ports:
        - containerPort: 80
EOF

echo "Application deployed successfully in namespace $NAMESPACE"