name: CI

on:
  pull_request:
    branches:
      - main

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Validate Python syntax
        run: |
          FAIL=0
          for f in $(find . -name '*.py' -not -path './venv/*'); do
            if ! python3 -c "import py_compile; py_compile.compile('$f', doraise=True)" 2>/dev/null; then
              echo "FAIL: $f"
              FAIL=1
            else
              echo "OK: $f"
            fi
          done
          exit $FAIL

      - name: Validate JSON
        run: |
          FAIL=0
          for f in $(find . -name '*.json' -not -path './venv/*'); do
            if ! python3 -c "import json; json.load(open('$f'))"; then
              echo "FAIL: $f"
              FAIL=1
            else
              echo "OK: $f"
            fi
          done
          exit $FAIL

      - name: Validate YAML
        run: |
          pip install pyyaml -q
          FAIL=0
          for f in $(find . -name '*.yaml' -o -name '*.yml' | grep -v '.gitea/'); do
            if ! python3 -c "import yaml; yaml.safe_load(open('$f'))"; then
              echo "FAIL: $f"
              FAIL=1
            else
              echo "OK: $f"
            fi
          done
          exit $FAIL

      - name: "HARD RULE: 10-line net addition limit"
        run: |
          ADDITIONS=$(git diff --numstat origin/main...HEAD | awk '{s+=$1} END {print s+0}')
          DELETIONS=$(git diff --numstat origin/main...HEAD | awk '{s+=$2} END {print s+0}')
          NET=$((ADDITIONS - DELETIONS))
          echo "Additions: +$ADDITIONS | Deletions: -$DELETIONS | Net: $NET"
          if [ "$NET" -gt 10 ]; then
            echo ""
            echo "═══════════════════════════════════════════════════"
            echo "  BLOCKED: Net addition is $NET lines (max: 10)."
            echo "  Delete code elsewhere to compensate."
            echo "═══════════════════════════════════════════════════"
            exit 1
          fi
          echo "✓ Net addition ($NET) within 10-line limit."