name: CD - Deploy Infrastructure

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  ci-terraform:
    name: Terraform Validation
    runs-on: self-hosted
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup OpenTofu
        run: |
          if ! command -v tofu &> /dev/null; then
            curl -fsSL https://get.opentofu.org/install-opentofu.sh | bash -s -- --install-method standalone --opentofu-version 1.10.7
          fi

      - name: Terraform Format Check
        run: |
          cd terraform
          tofu fmt -check -recursive
        continue-on-error: false

      - name: Terraform Validate
        run: |
          for dir in terraform/pve*; do
            if [ -d "$dir" ]; then
              echo "--- Validating $dir ---"
              (cd "$dir" && tofu init -backend=false && tofu validate)
            fi
          done

      - name: Terraform Plan
        run: |
          for dir in terraform/pve*; do
            if [ -d "$dir" ]; then
              echo "--- Planning $dir ---"
              (
                cd "$dir" && \
                tofu init && \
                tofu plan || echo "WARNING: Plan failed for $(basename $dir) - node may be unavailable"
              )
            fi
          done
        env:
          TF_VAR_proxmox_api_url: "https://192.168.100.10:8006/api2/json"
          TF_VAR_proxmox_token_id: ${{ secrets.PROXMOX_TOKEN_ID }}
          TF_VAR_proxmox_token_secret: ${{ secrets.PROXMOX_TOKEN_SECRET }}
          TF_VAR_proxmox_tls_insecure: "true"
          TF_VAR_ssh_public_key: ${{ secrets.SSH_PUBLIC_KEY }}
          TF_VAR_forgejo_token: ${{ secrets.GIT_TOKEN }}
          TF_VAR_forgejo_repo_url: ${{ secrets.GIT_REPO_URL }}
          TF_VAR_k3s_version: "v1.28.5+k3s1"
          TF_VAR_ubuntu_template: "ubuntu-2404-cloudinit"
          TF_VAR_storage_pool: "linstor_storage"
          TF_VAR_snippets_storage: "local"
          TF_VAR_k3s_network_bridge: "k3s"
          TF_VAR_k3s_gateway: "10.100.20.1"
          TF_VAR_k3s_dns: '["10.100.20.1", "1.1.1.1"]'
          TF_VAR_k3s_token: ${{ secrets.K3S_TOKEN }}
          TF_VAR_k3s_server_1_config: '{ ip = "10.100.20.10/24", cores = 6, memory = 12288, disk_size = "40G" }'
          TF_VAR_k3s_server_2_config: '{ ip = "10.100.20.20/24", cores = 6, memory = 12288, disk_size = "40G" }'
          TF_VAR_etcd_witness_config: '{ ip = "10.100.20.30/24", cores = 2, memory = 2048, disk_size = "20G" }'

  deploy-pve1:
    name: Deploy on pve1
    runs-on: self-hosted
    needs: ci-terraform
    continue-on-error: true
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Setup OpenTofu
        run: |
          if ! command -v tofu &> /dev/null; then
            curl -fsSL https://get.opentofu.org/install-opentofu.sh | bash -s -- --install-method standalone --opentofu-version 1.10.7
          fi
      - name: Terraform Apply on pve1
        run: |
          cd terraform/pve1
          cat > terraform.tfvars <<EOF
          proxmox_token_id      = "${{ secrets.PROXMOX_TOKEN_ID }}"
          proxmox_token_secret  = "${{ secrets.PROXMOX_TOKEN_SECRET }}"
          ssh_public_key        = "${{ secrets.SSH_PUBLIC_KEY }}"
          forgejo_token         = "${{ secrets.GIT_TOKEN }}"
          forgejo_repo_url      = "${{ secrets.GIT_REPO_URL }}"
          k3s_version                = "v1.28.5+k3s1"
          k3s_token                  = "${{ secrets.K3S_TOKEN }}"
          ubuntu_template            = "ubuntu-2404-cloudinit"
          storage_pool               = "linstor_storage"
          k3s_server_1_storage_pool  = "local-nvme"
          snippets_storage           = "local"
          k3s_network_bridge         = "k3s"
          k3s_gateway                = "10.100.20.1"
          k3s_dns                    = ["10.100.20.1", "1.1.1.1"]
          k3s_server_1_config        = { ip = "10.100.20.10/24", cores = 6, memory = 12288, disk_size = "40G" }
          EOF
          tofu init
          tofu apply -auto-approve

  deploy-pve2:
    name: Deploy on pve2
    runs-on: self-hosted
    needs: ci-terraform
    continue-on-error: true
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Setup OpenTofu
        run: |
          if ! command -v tofu &> /dev/null; then
            curl -fsSL https://get.opentofu.org/install-opentofu.sh | bash -s -- --install-method standalone --opentofu-version 1.10.7
          fi
      - name: Terraform Apply on pve2
        run: |
          cd terraform/pve2
          cat > terraform.tfvars <<EOF
          proxmox_token_id           = "${{ secrets.PROXMOX_TOKEN_ID }}"
          proxmox_token_secret       = "${{ secrets.PROXMOX_TOKEN_SECRET }}"
          ssh_public_key             = "${{ secrets.SSH_PUBLIC_KEY }}"
          forgejo_token              = "${{ secrets.GIT_TOKEN }}"
          forgejo_repo_url           = "${{ secrets.GIT_REPO_URL }}"
          k3s_version                = "v1.28.5+k3s1"
          k3s_token                  = "${{ secrets.K3S_TOKEN }}"
          ubuntu_template            = "ubuntu-2404-cloudinit"
          storage_pool               = "linstor_storage"
          k3s_server_2_storage_pool  = "local-nvme"
          snippets_storage           = "local"
          k3s_network_bridge         = "k3s"
          k3s_gateway                = "10.100.20.1"
          k3s_dns                    = ["10.100.20.1", "1.1.1.1"]
          k3s_server_2_config        = { ip = "10.100.20.20/24", cores = 6, memory = 12288, disk_size = "40G" }
          EOF
          tofu init
          tofu apply -auto-approve

  deploy-pve3:
    name: Deploy on pve3
    runs-on: self-hosted
    needs: ci-terraform
    continue-on-error: true
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Setup OpenTofu
        run: |
          if ! command -v tofu &> /dev/null; then
            curl -fsSL https://get.opentofu.org/install-opentofu.sh | bash -s -- --install-method standalone --opentofu-version 1.10.7
          fi
      - name: Terraform Apply on pve3
        run: |
          cd terraform/pve3
          cat > terraform.tfvars <<EOF
          proxmox_token_id           = "${{ secrets.PROXMOX_TOKEN_ID }}"
          proxmox_token_secret       = "${{ secrets.PROXMOX_TOKEN_SECRET }}"
          ssh_public_key             = "${{ secrets.SSH_PUBLIC_KEY }}"
          forgejo_token              = "${{ secrets.GIT_TOKEN }}"
          forgejo_repo_url           = "${{ secrets.GIT_REPO_URL }}"
          k3s_version                = "v1.28.5+k3s1"
          k3s_token                  = "${{ secrets.K3S_TOKEN }}"
          ubuntu_template            = "ubuntu-2404-cloudinit"
          storage_pool               = "linstor_storage"
          etcd_witness_storage_pool  = "local-lvm"
          snippets_storage           = "local"
          k3s_network_bridge         = "k3s"
          k3s_gateway                = "10.100.20.1"
          k3s_dns                    = ["10.100.20.1", "1.1.1.1"]
          etcd_witness_config        = { ip = "10.100.20.30/24", cores = 2, memory = 2048, disk_size = "20G" }
          EOF
          tofu init
          tofu apply -auto-approve

  # Validate cluster after deployment
  validate-cluster:
    name: Validate K3s Cluster
    runs-on: self-hosted
    needs: [deploy-pve1, deploy-pve2, deploy-pve3]
    if: |
      always() &&
      github.ref == 'refs/heads/main' &&
      (
        (needs.deploy-pve1.result == 'success' && needs.deploy-pve2.result == 'success') ||
        (needs.deploy-pve1.result == 'success' && needs.deploy-pve3.result == 'success') ||
        (needs.deploy-pve2.result == 'success' && needs.deploy-pve3.result == 'success')
      )
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Wait for K3s cluster
        run: |
          echo "Waiting for K3s cluster to be ready..."
          sleep 300
      - name: Check cluster status
        run: |
          echo "Cluster validation completed"
        continue-on-error: true

  notify:
    name: Deployment Notification
    runs-on: self-hosted
    needs: [deploy-pve1, deploy-pve2, deploy-pve3, validate-cluster]
    if: always()
    steps:
      - name: Deployment Summary
        run: |
          echo "=== Deployment Summary ==="
          echo "pve1 (k3s-server-1): ${{ needs.deploy-pve1.result }}"
          echo "pve2 (k3s-server-2): ${{ needs.deploy-pve2.result }}"
          echo "pve3 (etcd-witness):  ${{ needs.deploy-pve3.result }}"
          echo "Cluster validation:  ${{ needs.validate-cluster.result }}"
          echo ""

          # Count successful deployments
          success_count=0
          [ "${{ needs.deploy-pve1.result }}" == "success" ] && ((success_count++))
          [ "${{ needs.deploy-pve2.result }}" == "success" ] && ((success_count++))
          [ "${{ needs.deploy-pve3.result }}" == "success" ] && ((success_count++))

          echo "Nodes deployed: $success_count/3"

          if [ $success_count -ge 2 ]; then
            echo "SUCCESS: HA maintained - Quorum achieved ($success_count/3 nodes)"
            exit 0
          elif [ $success_count -eq 1 ]; then
            echo "WARNING: Only 1 node deployed - No HA"
            exit 1
          else
            echo "CRITICAL: No nodes deployed"
            exit 1
          fi