name: ELP Release

on:
  push:
    branches:
      - main
  repository_dispatch:
    types:
      - el-sdk-updated

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

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

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

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

      # Install El SDK — try GCP Artifact Registry prod first, fall back to Gitea release
      - name: Install El SDK
        env:
          GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
          RELEASE_BASE: https://git.neuralplatform.ai/neuron-technologies/el/releases/download/latest
        run: |
          echo "${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-prod \
            --location=us-central1 \
            --project=neuron-785695 \
            --package=el/elc \
            --format="value(name)" 2>/dev/null | sort | tail -1 | sed 's|.*/||' || true)

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

          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

      # Build ELP binary (Engram Language Protocol — 31 language NLG engine)
      # Source order is defined in manifest.el
      - 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

      # Publish / update the `latest` release
      - name: Publish latest release
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          GITEA_API: https://git.neuralplatform.ai/api/v1
          REPO: neuron-technologies/elp
        run: |
          EXISTING_ID=$(curl -sf \
            -H "Authorization: token ${GITEA_TOKEN}" \
            "${GITEA_API}/repos/${REPO}/releases/tags/latest" \
            | python3 -c "import sys,json; d=json.load(sys.stdin); print(d['id'])" 2>/dev/null || true)

          if [ -n "${EXISTING_ID}" ]; then
            echo "Deleting existing release id=${EXISTING_ID}"
            curl -sf -X DELETE \
              -H "Authorization: token ${GITEA_TOKEN}" \
              "${GITEA_API}/repos/${REPO}/releases/${EXISTING_ID}"
          fi

          curl -sf -X DELETE \
            -H "Authorization: token ${GITEA_TOKEN}" \
            "${GITEA_API}/repos/${REPO}/tags/latest" || true

          RELEASE_ID=$(curl -sf -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            "${GITEA_API}/repos/${REPO}/releases" \
            -d "{
              \"tag_name\": \"latest\",
              \"name\": \"ELP (latest)\",
              \"body\": \"Latest ELP build from commit ${GITHUB_SHA}.\nBuilt $(date -u +%Y-%m-%dT%H:%M:%SZ).\",
              \"draft\": false,
              \"prerelease\": false
            }" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")

          echo "Created release id=${RELEASE_ID}"

          curl -sf -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -F "attachment=@dist/elp;filename=elp" \
            "${GITEA_API}/repos/${REPO}/releases/${RELEASE_ID}/assets"

          echo "Release published successfully"

      # Publish artifact to GCP Artifact Registry (prod)
      - name: Publish ELP to Artifact Registry (prod)
        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="${GITEA_SHA:0:8}"
          gcloud artifacts generic upload \
            --repository=foundation-prod \
            --location=us-central1 \
            --project=neuron-785695 \
            --package=elp/elp \
            --version="${VERSION}" \
            --source=dist/elp

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

      # Dispatch elp-updated to downstream dependents
      - name: Dispatch elp-updated to el-ide
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          GITEA_API: https://git.neuralplatform.ai/api/v1
        run: |
          curl -sf -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            "${GITEA_API}/repos/neuron-technologies/el-ide/dispatches" \
            -d "{\"type\":\"elp-updated\",\"inputs\":{\"elp_version\":\"latest\",\"commit\":\"${GITHUB_SHA}\"}}"
          echo "Dispatched elp-updated to neuron-technologies/el-ide"
