name: Deploy Prod (NATIVE)

on:
  push:
    branches:
      - main

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Code
        uses: https://github.com/actions/checkout@v4

      - name: Generate CloudWatch Config Locally
        run: |
          mkdir -p tmp
          cat << 'EOF' > tmp/amazon-cloudwatch-agent.json
          {
            "agent": { "metrics_collection_interval": 60, "run_as_user": "root" },
            "metrics": {
              "metrics_collected": {
                "disk": { "measurement": ["used_percent"], "metrics_collection_interval": 60, "resources": ["/"] },
                "mem":  { "measurement": ["mem_used_percent"], "metrics_collection_interval": 60 }
              }
            },
            "logs": {
              "logs_collected": {
                "files": {
                  "collect_list": [
                    { "file_path": "/home/ubuntu/emailservice/logs/app.log",      "log_group_name": "/emailservice/app",      "log_stream_name": "{instance_id}", "retention_in_days": 30 },
                    { "file_path": "/home/ubuntu/emailservice/logs/error.log",    "log_group_name": "/emailservice/error",    "log_stream_name": "{instance_id}", "retention_in_days": 30 },
                    { "file_path": "/home/ubuntu/emailservice/logs/requests.log", "log_group_name": "/emailservice/requests", "log_stream_name": "{instance_id}", "retention_in_days": 30 },
                    { "file_path": "/home/ubuntu/emailservice/logs/gunicorn-access.log", "log_group_name": "/emailservice/gunicorn-access", "log_stream_name": "{instance_id}", "retention_in_days": 30 },
                    { "file_path": "/home/ubuntu/emailservice/logs/gunicorn-error.log",  "log_group_name": "/emailservice/gunicorn-error",  "log_stream_name": "{instance_id}", "retention_in_days": 30 }
                  ]
                }
              }
            }
          }
          EOF

      - name: Package Application
        run: |
          tar -czf app.tar.gz --exclude=.git --exclude=tmp .

      - name: Deploy to Prod EC2
        run: |
          apk add --no-cache openssh-client aws-cli
          mkdir -p ~/.ssh
          echo "${{ secrets.EC2_SSH_KEY }}" > ~/.ssh/id_rsa
          chmod 600 ~/.ssh/id_rsa

          # Copy app archive and configuration files
          scp -o StrictHostKeyChecking=no -i ~/.ssh/id_rsa app.tar.gz tmp/amazon-cloudwatch-agent.json emailservice.service ${{ secrets.EC2_USERNAME }}@${{ secrets.EC2_HOST }}:/tmp/

          # Execute deployment commands on remote server
          ssh -o StrictHostKeyChecking=no -i ~/.ssh/id_rsa ${{ secrets.EC2_USERNAME }}@${{ secrets.EC2_HOST }} << 'EOF'
            set -e

            # ── 2. Install Host Dependencies ──────────────────────────────
            sudo apt-get update
            sudo apt-get install -y python3-pip python3-venv python3-dev default-libmysqlclient-dev pkg-config libpq-dev build-essential

            # ── 3. Extract codebase to target directory ───────────────────
            sudo mkdir -p /home/ubuntu/emailservice
            sudo chown -R ubuntu:ubuntu /home/ubuntu/emailservice
            tar -xzf /tmp/app.tar.gz -C /home/ubuntu/emailservice

            # ── 4. Set up python virtual environment & dependencies ────────
            cd /home/ubuntu/emailservice
            mkdir -p logs
            python3 -m venv venv
            ./venv/bin/pip install --upgrade pip
            ./venv/bin/pip install -r requirements.txt

            # ── 5. Configure environment variables ─────────────────────────
            echo "DEBUG=0" > .env
            echo "DB_USER=vignesh" >> .env
            echo "DB_PASSWORD=vtechnosoft@123A" >> .env
            echo "DB_HOST=127.0.0.1" >> .env
            echo "DB_PORT=5432" >> .env

            # ── 6. Run Database Migrations ─────────────────────────────────
            ./venv/bin/python manage.py migrate --noinput

            # ── 7. Configure and restart Systemd service ───────────────────
            sudo mv /tmp/emailservice.service /etc/systemd/system/emailservice.service
            sudo systemctl daemon-reload
            sudo systemctl enable emailservice
            sudo systemctl restart emailservice

            # ── 8. Configure CloudWatch Agent ──────────────────────────────
            sudo mv /tmp/amazon-cloudwatch-agent.json /opt/aws/amazon-cloudwatch-agent/etc/amazon-cloudwatch-agent.json
            sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl \
              -a fetch-config -m ec2 -s \
              -c file:/opt/aws/amazon-cloudwatch-agent/etc/amazon-cloudwatch-agent.json

            # ── 9. Cleanup tmp files ───────────────────────────────────────
            rm -f /tmp/app.tar.gz
          EOF