# Continuous Deployment Workflow
# This workflow deploys your application to Kubernetes cluster
# Trigger: Manual dispatch only

name: CD - Deploy to Kubernetes

# Trigger configuration - manual dispatch only
on:
  workflow_dispatch:
    inputs:
      image_tag:
        description: 'Docker image tag to deploy (e.g., latest, v1.0.0)'
        required: false
        default: 'latest'
        type: string
      namespace:
        description: 'Kubernetes namespace (e.g., production, staging)'
        required: false
        default: 'default'
        type: string
      ingress_host:
        description: 'Ingress host domain (e.g., www.example.com)'
        required: false
        default: ''
        type: string

# Environment variables available to all jobs
env:
  # Kubernetes configuration
  KUBECONFIG_DATA: ${{ secrets.KUBECONFIG_DATA }}
  KUBERNETES_URL: ${{ secrets.KUBERNETES_URL }}
  KUBERNETES_NAMESPACE: ${{ inputs.namespace || secrets.KUBERNETES_NAMESPACE }}
  KUBERNETES_INGRESS_HOST: ${{ inputs.ingress_host || secrets.KUBERNETES_INGRESS_HOST }}
  
  # Container registry configuration
  CONTAINER_REGISTRY_URL: ${{ secrets.CONTAINER_REGISTRY_URL }}
  CONTAINER_REGISTRY_USERNAME: ${{ secrets.CONTAINER_REGISTRY_USERNAME }}
  CONTAINER_REGISTRY_NAMESPACE: ${{ secrets.CONTAINER_REGISTRY_NAMESPACE }}
  CONTAINER_REGISTRY_PASSWORD: ${{ secrets.CONTAINER_REGISTRY_PASSWORD }}
  CONTAINER_IMAGE_NAME: ${{ secrets.CONTAINER_IMAGE_NAME }}
  CONTAINER_IMAGE_TAG: ${{ inputs.image_tag || 'latest' }}

jobs:
  deploy:
    name: Deploy to Kubernetes
    runs-on: ubuntu-latest
    
    steps:
      # Step 1: Checkout code from repository
      - name: Checkout code
        uses: actions/checkout@v4
      
      # Step 2: Make CD script executable
      - name: Make CD script executable
        run: chmod +x script/cd.sh
      
      # Step 3: Deploy to Kubernetes
      - name: Deploy to Kubernetes
        run: ./script/cd.sh deploy
      
      # Step 4: Output deployment summary
      - name: Deployment Summary
        if: success()
        run: |
          echo "### :white_check_mark: Deployment Successful!" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Application:** \`${CONTAINER_IMAGE_NAME}\`" >> $GITHUB_STEP_SUMMARY
          echo "**Namespace:** \`${KUBERNETES_NAMESPACE}\`" >> $GITHUB_STEP_SUMMARY
          echo "**Image:** \`${CONTAINER_REGISTRY_URL}/${CONTAINER_REGISTRY_NAMESPACE}/${CONTAINER_IMAGE_NAME}:${CONTAINER_IMAGE_TAG}\`" >> $GITHUB_STEP_SUMMARY
          echo "**URL:** http://${KUBERNETES_INGRESS_HOST}" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "---" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Deployment Time:** $(date -u +'%Y-%m-%d %H:%M:%S UTC')" >> $GITHUB_STEP_SUMMARY
      
      # Step 5: Output failure message
      - name: Deployment Failed
        if: failure()
        run: |
          echo "### :x: Deployment Failed!" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Please check the logs above for error details." >> $GITHUB_STEP_SUMMARY