name: Math-First Checks

on:
  pull_request:
    paths:
      - '0-Core-Formalism/lean/Semantics/**'
      - '6-Documentation/docs/distilled/**'
      - 'shared-data/artifacts/deepseek_review/**'
      - 'shared-data/data/stack_solidification/**'
      - 'shared-data/schemas/**'
      - 'scripts/math-first/**'
      - 'claims.yaml'
      - '.pre-commit-config.yaml'
      - '.github/workflows/math-check.yml'
  push:
    branches:
      - main
      - distilled
    paths:
      - '0-Core-Formalism/lean/Semantics/**'
      - '6-Documentation/docs/distilled/**'
      - 'shared-data/artifacts/deepseek_review/**'
      - 'shared-data/data/stack_solidification/**'
      - 'shared-data/schemas/**'
      - 'scripts/math-first/**'
      - 'claims.yaml'
      - '.pre-commit-config.yaml'
      - '.github/workflows/math-check.yml'
  workflow_dispatch:

permissions:
  contents: read
  pull-requests: write

concurrency:
  group: math-check-${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  validate-schemas:
    name: Validate DeepSeek receipts and claims registry
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          submodules: false

      - name: Setup Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install validator dependencies
        run: |
          python -m pip install --upgrade pip
          python -m pip install "jsonschema>=4.21" "rfc3339-validator" "PyYAML"

      - name: Validate JSON Schema files compile
        run: |
          python - <<'PY'
          import json, sys
          from pathlib import Path
          from jsonschema import Draft202012Validator
          for path in sorted(Path("shared-data/schemas").glob("*.schema.json")):
              schema = json.loads(path.read_text())
              Draft202012Validator.check_schema(schema)
              print(f"OK   {path}")
          PY

      - name: Validate all tracked DeepSeek review receipts
        run: |
          python3 scripts/math-first/validate_deepseek_receipts.py

      - name: Self-tests for receipt validator
        run: |
          python3 scripts/math-first/test_validate_deepseek_receipts.py

      - name: Validate claims registry
        run: |
          python3 scripts/math-first/validate_claims_registry.py

      - name: Verify receipt SHA-256 integrity against answer files
        # Re-run the canonical emitter in --verify-only mode against every
        # tracked receipt. This is the AGENTS.md contract for promoted
        # Ollama/DeepSeek review receipts: answer_sha256 must match the bytes
        # of the answer file on disk.
        run: |
          set -euo pipefail
          shopt -s nullglob
          emitter="5-Applications/tools-scripts/llm/ollama_deepseek_review_emitter.py"
          if [ ! -x "$emitter" ] && [ ! -f "$emitter" ]; then
            echo "skip: $emitter not present (nothing to verify)"
            exit 0
          fi
          receipts=(shared-data/artifacts/deepseek_review/*.receipt.json)
          if [ "${#receipts[@]}" -eq 0 ]; then
            echo "no receipts to verify"
            exit 0
          fi
          failures=0
          for receipt in "${receipts[@]}"; do
            if python3 "$emitter" --verify-only "$receipt"; then
              echo "OK   $receipt"
            else
              echo "FAIL $receipt"
              failures=$((failures + 1))
            fi
          done
          if [ "$failures" -gt 0 ]; then
            echo "$failures receipt(s) failed --verify-only" >&2
            exit 1
          fi

  require-evidence:
    name: Require math evidence on math-track PRs
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Require receipt or Lean change alongside math-track edits
        run: |
          python3 scripts/math-first/require_math_evidence.py \
            --from-git-diff origin/${{ github.base_ref }}

  pre-commit:
    name: Run pre-commit hooks on changed files
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          # We deliberately do not smudge LFS pointers here -- the pre-commit
          # hooks never need the actual binary content, and pulling LFS would
          # add noise. The next step disables the LFS smudge filters locally
          # so pre-commit's stash/pop cycle does not trip over pointer files.
          lfs: false

      - name: Disable LFS filters for pre-commit
        # pre-commit stashes unstaged changes before running hooks and pops
        # them back after. When the working tree contains LFS pointer files
        # but Git's LFS smudge filter is configured (per .gitattributes), the
        # stash/pop cycle reports a phantom diff against the binary content
        # Git thinks it should smudge, and the pop fails. Clearing the
        # filters locally for this job removes the disagreement without
        # mutating the repository or any LFS-tracked files.
        run: |
          git config --local filter.lfs.smudge ""
          git config --local filter.lfs.clean ""
          git config --local filter.lfs.process ""
          git config --local filter.lfs.required false

      - name: Setup Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install pre-commit
        run: python -m pip install --upgrade pip "pre-commit>=3.7"

      - name: Run pre-commit on changed files
        run: |
          base="origin/${{ github.base_ref }}"
          head="HEAD"
          pre-commit run --from-ref "$base" --to-ref "$head" --show-diff-on-failure