# Reusable workflow: C-Lib (Cat 2 per ADR-0025)
# Build C-Lib gegen Engine-Release-Headers + Import-Lib → on-tag zip
name: C-Lib CI

on:
  workflow_call:
    inputs:
      engine_release_tag:
        description: "Engine release to build against (e.g. 'v0.1.0' or 'latest')"
        type: string
        default: "latest"
      build_type:
        type: string
        default: "Release"

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Download engine release (headers + import lib)
        shell: bash
        env:
          GITEA_API: "https://git.davoryn.de/api/v1"
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          set -euo pipefail
          OS_TAG="${{ matrix.os }}"
          OS_TAG="${OS_TAG//-latest/}"
          TAG="${{ inputs.engine_release_tag }}"
          if [ "$TAG" = "latest" ]; then
            TAG=$(curl -sH "Authorization: token ${GITEA_TOKEN}" \
              "${GITEA_API}/repos/calic/sporel-engine/releases/latest" | \
              grep -oP '"tag_name":"\K[^"]+')
          fi
          ARTEFACT="sporel-engine-${TAG}-${OS_TAG}.zip"
          mkdir -p engine-release
          curl -sL -H "Authorization: token ${GITEA_TOKEN}" \
            -o "engine-release/${ARTEFACT}" \
            "https://git.davoryn.de/calic/sporel-engine/releases/download/${TAG}/${ARTEFACT}"
          cd engine-release && unzip "${ARTEFACT}" && rm "${ARTEFACT}"
          echo "SPOREL_ROOT=${{ github.workspace }}/engine-release" >> "$GITHUB_ENV"

      - name: Manifest validation (lib.json)
        shell: bash
        run: |
          if [ -f lib.json ]; then
            python3 -c "import json,sys; d=json.load(open('lib.json'));
          assert d.get('id'), 'missing id'; assert d.get('version'), 'missing version';
          assert d.get('api'), 'missing api field (per ADR-0022)';
          print('lib.json OK:', d['id'], d['version'])"
          else
            echo "::warning::no lib.json found"
          fi

      - name: README presence (per ADR-0026)
        shell: bash
        run: |
          test -s README.md || (echo "::error::README.md missing or empty" && exit 1)

      - name: Configure CMake
        run: cmake -B build -DCMAKE_BUILD_TYPE=${{ inputs.build_type }} -DSPOREL_ROOT=${{ env.SPOREL_ROOT }}

      - name: Build
        run: cmake --build build --config ${{ inputs.build_type }} --parallel

      - name: Package lib (on tag)
        if: startsWith(github.ref, 'refs/tags/')
        shell: bash
        run: |
          OS_TAG="${{ matrix.os }}"
          OS_TAG="${OS_TAG//-latest/}"
          ARTEFACT_NAME="${GITHUB_REPOSITORY##*/}-${GITHUB_REF_NAME}-${OS_TAG}.zip"
          cmake --install build --prefix=${{ github.workspace }}/lib-install --config ${{ inputs.build_type }}
          cd lib-install && zip -r "../${ARTEFACT_NAME}" . && cd ..
          echo "ARTEFACT_NAME=${ARTEFACT_NAME}" >> "$GITHUB_ENV"

      - name: Upload to Gitea Release (on tag)
        if: startsWith(github.ref, 'refs/tags/')
        uses: akkuman/gitea-release-action@v1
        with:
          files: ${{ env.ARTEFACT_NAME }}