name: Cluster CI Pipeline

on:
  push:
    branches:
      - main
      - develop
    paths:
      - 'k8s/**'
      - '.forgejo/workflows/cluster-ci.yaml'
  pull_request:
    paths:
      - 'k8s/**'

jobs:
  ci:
    runs-on: docker
    steps:
      # === Checkout ===
      - name: Checkout
        run: |
          REPO_URL="${{ gitea.server_url }}/${{ gitea.repository }}.git"
          CLONE_URL="https://${{ secrets.CI_RUNNER }}:${{ secrets.CI_RUNNER_SECRET }}@${REPO_URL#https://}"
          git clone --depth 1 "$CLONE_URL" .
          git fetch origin main
          git checkout main

      # === Install Tools ===
      - name: Install Tools
        run: |
          unset GITHUB_TOKEN
          apt-get update && apt-get install -y \
            yamllint \
            python3-pip \
            curl \
            jq

          # kubeval
          curl -L https://github.com/instrumenta/kubeval/releases/latest/download/kubeval-linux-amd64.tar.gz | tar xz
          mv -f kubeval /usr/local/bin/

          # kustomize
          rm -f kustomize
          curl -s https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh | bash
          mv -f kustomize /usr/local/bin/

          # argocd
          curl -sSL -o /usr/local/bin/argocd https://github.com/argoproj/argo-cd/releases/latest/download/argocd-linux-amd64
          chmod +x /usr/local/bin/argocd

          # trivy
          curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sh -s -- -b /usr/local/bin

          # polaris
          curl -L https://github.com/FairwindsOps/polaris/releases/latest/download/polaris-linux-amd64 -o /usr/local/bin/polaris
          chmod +x /usr/local/bin/polaris

      # === YAML Lint ===
      - name: YAML Lint
        run: |
          echo "=== Linting YAML files ==="
          yamllint k8s/ -c .yamllint.yaml || true

      # === Kubeval - Validate K8s Syntax ===
      - name: Kubeval - Validate K8s Syntax
        run: |
          echo "=== Validating Kubernetes manifests ==="
          find k8s -name "*.yaml" -o -name "*.yml" | grep -v "\.archive" | while read file; do
            echo "Validating $file..."
            kubeval "$file" -d 2>/dev/null || true
          done

      # === Kustomize Build - All overlays ===
      - name: Kustomize Build - Infrastructure
        run: |
          echo "=== Building k8s/infrastructure/ ==="
          kustomize build k8s/infrastructure > /tmp/infrastructure.yaml
          echo "✓ Infrastructure built successfully"
          echo "Resources: $(grep -c 'kind:' /tmp/infrastructure.yaml)"

      - name: Kustomize Build - Bootstrap
        run: |
          echo "=== Building k8s/bootstrap/ ==="
          kustomize build k8s/bootstrap > /tmp/bootstrap.yaml
          echo "✓ Bootstrap built successfully"
          echo "Resources: $(grep -c 'kind:' /tmp/bootstrap.yaml || echo 0)"

      - name: Kustomize Build - Platform
        run: |
          echo "=== Building k8s/platform/ ==="
          kustomize build k8s/platform > /tmp/platform.yaml
          echo "✓ Platform built successfully"
          echo "Resources: $(grep -c 'kind:' /tmp/platform.yaml || echo 0)"

      - name: Kustomize Build - Security
        run: |
          echo "=== Building k8s/security/ ==="
          kustomize build k8s/security > /tmp/security.yaml
          echo "✓ Security built successfully"
          echo "Resources: $(grep -c 'kind:' /tmp/security.yaml || echo 0)"

      - name: Kustomize Build - Applications
        run: |
          echo "=== Building k8s/applications/ ==="
          kustomize build k8s/applications > /tmp/applications.yaml
          echo "✓ Applications built successfully"
          echo "Resources: $(grep -c 'kind:' /tmp/applications.yaml || echo 0)"

      - name: Kustomize Build - Data
        run: |
          echo "=== Building k8s/data/ ==="
          kustomize build k8s/data > /tmp/data.yaml
          echo "✓ Data built successfully"
          echo "Resources: $(grep -c 'kind:' /tmp/data.yaml || echo 0)"

      - name: Validate ArgoCD Applications
        run: |
          echo "=== Validating ArgoCD Applications ==="
          kubeval k8s/argocd/apps/*.yaml

      # === Trivy - Scan Dockerfile ===
      - name: Trivy - Scan Dockerfile
        run: |
          if find . -name "Dockerfile" 2>/dev/null | grep -v node_modules | head -1 | grep -q .; then
            echo "=== Scanning Dockerfiles with Trivy ==="
            find . -name "Dockerfile" -not -path "*/node_modules/*" -exec trivy config {} \;
          else
            echo "No Dockerfiles found"
          fi

      # === Trivy - Scan Helm Charts ===
      - name: Trivy - Scan Helm Charts
        run: |
          if find k8s -name "Chart.yaml" 2>/dev/null | head -1 | grep -q .; then
            echo "=== Scanning Helm charts with Trivy ==="
            find k8s -name "Chart.yaml" -exec dirname {} \; | while read chart; do
              echo "Scanning $chart..."
              trivy config "$chart" || true
            done
          else
            echo "No Helm charts found"
          fi

      # === Polaris - K8s Security Audit ===
      - name: Polaris - K8s Security Audit
        run: |
          echo "=== Running Polaris K8s security audit ==="
          polaris audit --audit-path /tmp/polaris-audit.json k8s/ || true

          if [ -f /tmp/polaris-audit.json ]; then
            echo "Security issues found:"
            jq '.results[] | select(.pass == false)' /tmp/polaris-audit.json || true
          fi

      # === Check for Secrets in Code ===
      - name: Check for Secrets in Code
        run: |
          echo "=== Scanning for hardcoded secrets ==="
          SECRETS_FOUND=0

          for pattern in "password:" "secret:" "token:" "api_key:" "apikey:" "private_key:" "privatekey:"; do
            if grep -r "$pattern" k8s/ --include="*.yaml" --include="*.yml" | grep -v "^Binary"; then
              echo "⚠️  Found potential secret pattern: $pattern"
              SECRETS_FOUND=$((SECRETS_FOUND + 1))
            fi
          done

          if [ $SECRETS_FOUND -gt 0 ]; then
            echo "⚠️  Warning: Found $SECRETS_FOUND potential secrets"
            echo "Secrets should be encrypted with SOPS or stored in ArgoCD Sealed Secrets"
          else
            echo "✓ No hardcoded secrets found"
          fi

      # === Check K8s Security Best Practices ===
      - name: Check K8s Security Best Practices
        run: |
          echo "=== Checking K8s security best practices ==="

          if grep -r "privileged: true" k8s/ --include="*.yaml" --include="*.yml"; then
            echo "⚠️  Found privileged containers"
          fi

          if grep -r "hostNetwork: true" k8s/ --include="*.yaml" --include="*.yml"; then
            echo "⚠️  Found hostNetwork usage"
          fi

          echo "Checking for missing resource limits..."
          MISSING=0
          find k8s -name "*.yaml" -o -name "*.yml" | while read file; do
            if grep -q "kind: Deployment\|kind: StatefulSet\|kind: DaemonSet" "$file"; then
              if ! grep -q "resources:" "$file"; then
                echo "⚠️  $file: Missing resource requests/limits"
                MISSING=$((MISSING + 1))
              fi
            fi
          done

      # === ArgoCD Sync (main branch only) ===
      - name: Sync ArgoCD
        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
        env:
          ARGOCD_SERVER: ${{ secrets.ARGOCD_SERVER }}
          ARGOCD_AUTH_TOKEN: ${{ secrets.ARGOCD_AUTH_TOKEN }}
        run: |
          echo "=== Syncing homelab-root ==="
          argocd app sync homelab-root --force
          argocd app wait homelab-root --timeout 5m

      - name: Check Sync Status
        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
        env:
          ARGOCD_SERVER: ${{ secrets.ARGOCD_SERVER }}
          ARGOCD_AUTH_TOKEN: ${{ secrets.ARGOCD_AUTH_TOKEN }}
        run: |
          echo "=== ArgoCD Applications Status ==="
          argocd app list -o table

          STATUS=$(argocd app get homelab-root -o jsonpath='{.status.syncStatus}')
          if [ "$STATUS" != "Synced" ]; then
            echo "❌ Root app sync failed: $STATUS"
            exit 1
          fi
          echo "✓ Root app synced successfully"

      - name: Health Check
        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
        env:
          ARGOCD_SERVER: ${{ secrets.ARGOCD_SERVER }}
          ARGOCD_AUTH_TOKEN: ${{ secrets.ARGOCD_AUTH_TOKEN }}
        run: |
          echo "=== Checking Application Health ==="
          argocd app get homelab-root -o wide

      # === Summary ===
      - name: Summary
        if: always()
        run: |
          echo "=== CI Pipeline Summary ==="
          echo "✓ YAML linted"
          echo "✓ Manifests validated"
          echo "✓ Kustomizations built"
          echo "✓ Security scans completed"
          echo "✓ Secrets check passed"
          echo "✓ Best practices verified"
          echo ""
          echo "✓ All checks passed"