name: ELP CI — stage

on:
  push:
    branches:
      - stage
  pull_request:
    branches:
      - stage

jobs:
  build-and-test:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Enforce source branch (stage ← dev only)
        if: github.event_name == 'pull_request'
        run: |
          SOURCE="${GITHUB_HEAD_REF}"
          if [ "${SOURCE}" != "dev" ]; then
            echo "ERROR: Stage branch only accepts PRs from 'dev'. Source was: '${SOURCE}'"
            exit 1
          fi
          echo "Source branch check passed: ${SOURCE} → stage"

      - name: Install build dependencies
        run: |
          apt-get update -qq
          apt-get install -y gcc libcurl4-openssl-dev

      - name: Install El SDK from stage registry
        env:
          GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
        run: |
          echo "${GCP_SA_KEY}" > /tmp/gcp-key.json
          apt-get install -y -qq apt-transport-https ca-certificates gnupg curl
          curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | gpg --dearmor -o /usr/share/keyrings/cloud.google.gpg
          echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] https://packages.cloud.google.com/apt cloud-sdk main" > /etc/apt/sources.list.d/google-cloud-sdk.list
          apt-get update -qq && apt-get install -y google-cloud-cli
          gcloud auth activate-service-account --key-file=/tmp/gcp-key.json
          gcloud config set project neuron-785695

          mkdir -p /usr/local/bin /usr/local/lib/el

          LATEST_VERSION=$(gcloud artifacts versions list \
            --repository=foundation-stage \
            --location=us-central1 \
            --project=neuron-785695 \
            --package=el/elc \
            --format="value(name)" 2>/dev/null | sort | tail -1 | sed 's|.*/||' || true)

          if [ -n "${LATEST_VERSION}" ]; then
            gcloud artifacts generic download \
              --repository=foundation-stage \
              --location=us-central1 \
              --project=neuron-785695 \
              --package=el/elc \
              --version="${LATEST_VERSION}" \
              --destination=/usr/local/bin/elc
            chmod +x /usr/local/bin/elc
          else
            echo "Falling back to Gitea latest release..."
            curl -fsSL "https://git.neuralplatform.ai/neuron-technologies/el/releases/download/latest/elc" \
              -o /usr/local/bin/elc
            chmod +x /usr/local/bin/elc
          fi

          RELEASE_BASE="https://git.neuralplatform.ai/neuron-technologies/el/releases/download/latest"
          curl -fsSL "${RELEASE_BASE}/el_runtime.c" -o /usr/local/lib/el/el_runtime.c
          curl -fsSL "${RELEASE_BASE}/el_runtime.h" -o /usr/local/lib/el/el_runtime.h

          echo "El SDK installed:"; elc --version || true
          rm -f /tmp/gcp-key.json

      - name: Build ELP binary
        run: |
          mkdir -p dist
          cat src/language-profile.el \
              src/vocabulary.el \
              src/morphology.el \
              src/morphology-es.el src/morphology-fr.el src/morphology-de.el \
              src/morphology-ru.el src/morphology-ja.el src/morphology-fi.el \
              src/morphology-ar.el src/morphology-hi.el src/morphology-sw.el \
              src/morphology-la.el src/morphology-he.el src/morphology-grc.el \
              src/morphology-ang.el src/morphology-sa.el src/morphology-got.el \
              src/morphology-non.el src/morphology-enm.el src/morphology-pi.el \
              src/morphology-fro.el src/morphology-goh.el src/morphology-sga.el \
              src/morphology-txb.el src/morphology-peo.el src/morphology-akk.el \
              src/morphology-uga.el src/morphology-egy.el src/morphology-sux.el \
              src/morphology-gez.el src/morphology-cop.el \
              src/grammar.el \
              src/realizer.el \
              src/semantics.el \
              src/elp.el \
            > /tmp/elp-combined.el
          elc /tmp/elp-combined.el > dist/elp.c
          cc -std=c11 -O2 \
            -I /usr/local/lib/el \
            -o dist/elp \
            dist/elp.c \
            /usr/local/lib/el/el_runtime.c \
            -lcurl -lpthread
          chmod +x dist/elp
          echo "Built dist/elp"
          ls -lh dist/elp

      - name: Run tests
        run: |
          ELC=/usr/local/bin/elc \
          EL_HOME="$(pwd)" \
          bash tests/run.sh

      - name: Publish ELP to Artifact Registry (stage)
        env:
          GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
        run: |
          echo "${GCP_SA_KEY}" > /tmp/gcp-key.json
          gcloud auth activate-service-account --key-file=/tmp/gcp-key.json
          gcloud config set project neuron-785695

          VERSION="${GITEA_SHA:0:8}"
          gcloud artifacts generic upload \
            --repository=foundation-stage \
            --location=us-central1 \
            --project=neuron-785695 \
            --package=elp/elp \
            --version="${VERSION}" \
            --source=dist/elp

          echo "Published elp version=${VERSION} to foundation-stage/elp/elp"
          rm -f /tmp/gcp-key.json
