# GitLab CI pipeline for verifying ATProto signatures

variables:
  REGISTRY: atcr.io
  IMAGE_NAME: $CI_PROJECT_PATH
  IMAGE_TAG: $REGISTRY/$IMAGE_NAME:$CI_COMMIT_SHA

stages:
  - build
  - verify
  - deploy

build_image:
  stage: build
  image: docker:latest
  services:
    - docker:dind
  script:
    - docker build -t $IMAGE_TAG .
    - docker push $IMAGE_TAG

verify_signature:
  stage: verify
  image: alpine:latest
  before_script:
    - apk add --no-cache curl jq
  script:
    - |
      echo "Verifying signature for $IMAGE_TAG"

      # Install crane
      wget https://github.com/google/go-containerregistry/releases/download/v0.15.2/go-containerregistry_Linux_x86_64.tar.gz
      tar -xzf go-containerregistry_Linux_x86_64.tar.gz crane
      mv crane /usr/local/bin/

      # Get image digest
      DIGEST=$(crane digest "$IMAGE_TAG")
      echo "Image digest: $DIGEST"

      # Extract repository path
      REPO=$(echo "$IMAGE_TAG" | cut -d: -f1)
      REPO_PATH=${REPO#$REGISTRY/}

      # Check for ATProto signature
      REFERRERS=$(curl -s "https://$REGISTRY/v2/$REPO_PATH/referrers/${DIGEST}?artifactType=application/vnd.atproto.signature.v1+json")

      SIG_COUNT=$(echo "$REFERRERS" | jq '.manifests | length')

      if [ "$SIG_COUNT" -eq 0 ]; then
        echo "❌ No ATProto signature found"
        exit 1
      fi

      echo "✓ Found $SIG_COUNT signature(s)"

verify_full:
  stage: verify
  image: alpine:latest
  before_script:
    - apk add --no-cache curl jq bash
  script:
    - |
      # Option 1: Use atcr-verify CLI (when available)
      # wget https://github.com/atcr-io/atcr/releases/latest/download/atcr-verify
      # chmod +x atcr-verify
      # ./atcr-verify "$IMAGE_TAG" --policy .atcr/trust-policy.yaml

      # Option 2: Use shell script
      chmod +x examples/verification/atcr-verify.sh
      ./examples/verification/atcr-verify.sh "$IMAGE_TAG"

      echo "✓ Signature verified successfully"

verify_trust:
  stage: verify
  image: alpine:latest
  before_script:
    - apk add --no-cache curl jq
  script:
    - |
      # Install crane and ORAS
      wget https://github.com/google/go-containerregistry/releases/download/v0.15.2/go-containerregistry_Linux_x86_64.tar.gz
      tar -xzf go-containerregistry_Linux_x86_64.tar.gz crane
      mv crane /usr/local/bin/

      wget https://github.com/oras-project/oras/releases/download/v1.0.0/oras_1.0.0_linux_amd64.tar.gz
      tar -xzf oras_1.0.0_linux_amd64.tar.gz
      mv oras /usr/local/bin/

      # Get signature metadata
      DIGEST=$(crane digest "$IMAGE_TAG")
      REPO=$(echo "$IMAGE_TAG" | cut -d: -f1)
      REPO_PATH=${REPO#$REGISTRY/}

      REFERRERS=$(curl -s "https://$REGISTRY/v2/$REPO_PATH/referrers/${DIGEST}?artifactType=application/vnd.atproto.signature.v1+json")
      SIG_DIGEST=$(echo "$REFERRERS" | jq -r '.manifests[0].digest')

      # Pull signature artifact
      oras pull "${REPO}@${SIG_DIGEST}" -o /tmp/sig

      # Extract DID
      DID=$(jq -r '.atproto.did' /tmp/sig/atproto-signature.json)
      echo "Signed by DID: $DID"

      # Check against trusted DIDs (from CI/CD variables)
      if [[ ",$TRUSTED_DIDS," == *",$DID,"* ]]; then
        echo "✓ DID is trusted"
      else
        echo "❌ DID $DID is not in trusted list"
        exit 1
      fi

deploy_production:
  stage: deploy
  image: bitnami/kubectl:latest
  dependencies:
    - verify_signature
    - verify_full
    - verify_trust
  only:
    - main
  script:
    - |
      # Configure kubectl
      echo "$KUBE_CONFIG" | base64 -d > /tmp/kubeconfig
      export KUBECONFIG=/tmp/kubeconfig

      # Deploy to production
      kubectl set image deployment/myapp \
        myapp=$IMAGE_TAG \
        -n production

      kubectl rollout status deployment/myapp -n production

      # Verify deployment
      kubectl get pods -n production -l app=myapp

# Alternative: Manual approval before deploy
deploy_production_manual:
  stage: deploy
  image: bitnami/kubectl:latest
  dependencies:
    - verify_signature
  when: manual
  only:
    - main
  script:
    - |
      echo "Deploying $IMAGE_TAG to production"

      echo "$KUBE_CONFIG" | base64 -d > /tmp/kubeconfig
      export KUBECONFIG=/tmp/kubeconfig

      kubectl set image deployment/myapp \
        myapp=$IMAGE_TAG \
        -n production