# .gitlab-ci-finalize-cr.yml — Rename CRxxxx.json to CRYYYY.json after merge.
#
# This job runs on pushes to "main" or "Rel-*" branches. If a CRxxxx.json file
# exists in SPEC_ROOT/history/, it reads the CR number, renames the file to
# CR0042.json (zero-padded), and pushes the commit back to the branch.
#
# This is intended to run after a merge request has been merged. The validate-cr
# job (in .gitlab-ci-validate-cr.yml) ensures the CR metadata is valid before
# the merge is allowed.
#
# Requirements:
#   - The CI runner must have push access to the repository. Configure a
#     project access token or deploy key with write access and set it as
#     CI_PUSH_TOKEN variable (Settings > CI/CD > Variables).
#   - Set CI_PUSH_USER to the username associated with the token (or use
#     "gitlab-ci-token" for project access tokens).
#
# Configure the SPEC_ROOT variable to match your specification layout.

variables:
  SPEC_ROOT: "specification"
  CI_PUSH_USER: "oauth2"
  # CI_PUSH_TOKEN: set in CI/CD variables (masked, protected)

stages:
  - finalize

finalize-cr:
  stage: finalize
  image: alpine:latest
  before_script:
    - apk add --no-cache git jq
  script:
    - |
      CR_FILE="${SPEC_ROOT}/history/CRxxxx.json"

      # Only proceed if CRxxxx.json exists (freshly merged CR branch)
      if [ ! -f "$CR_FILE" ]; then
        echo "No $CR_FILE found — nothing to finalize."
        exit 0
      fi

      # Read CR number
      CR_NUMBER=$(jq -r '.CR // empty' "$CR_FILE")
      if [ -z "$CR_NUMBER" ]; then
        echo "ERROR: $CR_FILE has no CR field — cannot rename."
        exit 1
      fi

      # Build target filename
      CR_PADDED=$(printf "CR%04d" "$CR_NUMBER")
      TARGET_FILE="${SPEC_ROOT}/history/${CR_PADDED}.json"

      # Safety check: target must not already exist
      if [ -f "$TARGET_FILE" ]; then
        echo "ERROR: $TARGET_FILE already exists — CR number conflict."
        exit 1
      fi

      echo "Renaming $CR_FILE → $TARGET_FILE"
      git mv "$CR_FILE" "$TARGET_FILE"

      # Configure git for the automated commit
      git config user.email "ci@specpress"
      git config user.name "SpecPress CI"

      git commit -m "Finalize ${CR_PADDED}: rename CRxxxx.json → ${CR_PADDED}.json"

      # Push back to the branch
      REMOTE_URL="https://${CI_PUSH_USER}:${CI_PUSH_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git"
      git push "$REMOTE_URL" HEAD:"$CI_COMMIT_REF_NAME"

      echo "✓ ${CR_PADDED}.json committed and pushed."
  rules:
    - if: $CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_REF_NAME == "main"
    - if: $CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_REF_NAME =~ /^Rel-\d+$/