name: El SDK Release

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  build-and-release:
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: lang

    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

      # Gen2: compile the bootstrap C source into a working elc binary
      - name: Build elc from bootstrap (gen2)
        run: |
          # -Wl,--allow-multiple-definition: elc-bootstrap.c and el_runtime.c both define
          # is_digit/is_whitespace; bootstrap predates the text-processing primitives commit
          gcc -O2 \
            -I el-compiler/runtime \
            dist/elc-bootstrap.c \
            el-compiler/runtime/el_runtime.c \
            -lcurl -lpthread -lm \
            -Wl,--allow-multiple-definition \
            -o dist/elc-gen2
          chmod +x dist/elc-gen2
          echo "gen2 elc built"
          dist/elc-gen2 --version || true

      # Gen3: use gen2 to compile the El compiler from its own El source (self-host)
      - name: Self-host compile El compiler with gen2 (gen3)
        run: |
          mkdir -p dist/platform
          dist/elc-gen2 el-compiler/src/compiler.el > dist/elc-gen3.c
          gcc -O2 \
            -I el-compiler/runtime \
            dist/elc-gen3.c \
            el-compiler/runtime/el_runtime.c \
            -lcurl -lpthread -lm \
            -o dist/platform/elc
          chmod +x dist/platform/elc
          echo "gen3 (self-hosted) elc built"
          dist/platform/elc --version || true

      # Build elb binary
      - name: Build elb
        run: |
          mkdir -p dist/bin
          dist/platform/elc elb.el > dist/elb.c
          gcc -O2 \
            -I el-compiler/runtime \
            dist/elb.c \
            el-compiler/runtime/el_runtime.c \
            -lcurl -lpthread -lm \
            -o dist/bin/elb
          chmod +x dist/bin/elb
          echo "elb built"

      # Build epm binary (epm lives at repo root, not inside lang/)
      - name: Build epm
        run: |
          dist/platform/elc ../epm/src/epm.el > dist/epm.c
          gcc -O2 \
            -I el-compiler/runtime \
            dist/epm.c \
            el-compiler/runtime/el_runtime.c \
            -lcurl -lpthread -lm \
            -o dist/bin/epm
          chmod +x dist/bin/epm
          echo "epm built"

      # Build el-install binary
      - name: Build el-install
        run: |
          dist/platform/elc tools/install/el-install.el > dist/el-install.c
          gcc -O2 \
            -I el-compiler/runtime \
            dist/el-install.c \
            el-compiler/runtime/el_runtime.c \
            -lcurl -lpthread -lm \
            -o dist/bin/el-install
          chmod +x dist/bin/el-install
          echo "el-install built"

      - name: Run tests - text
        run: |
          ELC="$(pwd)/dist/platform/elc" \
          EL_HOME="$(pwd)" \
          bash tests/text/run.sh

      - name: Run tests - calendar
        run: |
          ELC="$(pwd)/dist/platform/elc" \
          EL_HOME="$(pwd)" \
          bash tests/calendar/run.sh

      - name: Run tests - time
        run: |
          ELC="$(pwd)/dist/platform/elc" \
          EL_HOME="$(pwd)" \
          bash tests/time/run.sh

      - name: Run tests - html_sanitizer
        run: |
          ELC="$(pwd)/dist/platform/elc" \
          EL_HOME="$(pwd)" \
          bash tests/html_sanitizer/run.sh

      # Native El test suites (elc --test, compile-link-run)
      - name: Run tests - native (core)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_core.el > /tmp/el_native_core.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_core.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_core
          /tmp/el_native_core

      - name: Run tests - native (text)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_text.el > /tmp/el_native_text.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_text.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_text
          /tmp/el_native_text

      - name: Run tests - native (string)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_string.el > /tmp/el_native_string.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_string.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_string
          /tmp/el_native_string

      - name: Run tests - native (math)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_math.el > /tmp/el_native_math.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_math.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_math
          /tmp/el_native_math

      - name: Run tests - native (state)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_state.el > /tmp/el_native_state.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_state.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_state
          /tmp/el_native_state

      - name: Run tests - native (time)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_time.el > /tmp/el_native_time.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_time.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_time
          /tmp/el_native_time

      - name: Run tests - native (json)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_json.el > /tmp/el_native_json.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_json.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_json
          /tmp/el_native_json

      - name: Run tests - native (env)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_env.el > /tmp/el_native_env.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_env.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_env
          /tmp/el_native_env

      - name: Run tests - native (fs)
        run: |
          set -euo pipefail
          ELC="$(pwd)/dist/platform/elc"
          RUNTIME="$(pwd)/el-compiler/runtime"
          "$ELC" --test tests/native/test_fs.el > /tmp/el_native_fs.c
          gcc -O2 -I "$RUNTIME" /tmp/el_native_fs.c "$RUNTIME/el_runtime.c" \
            -lcurl -lpthread -lm -o /tmp/el_native_fs
          /tmp/el_native_fs

      # Bundle the SDK tarball - runs from the repo root to reference lang/ paths correctly
      - name: Bundle SDK tarball
        if: github.event_name == 'push'
        working-directory: ${{ github.workspace }}
        run: |
          mkdir -p dist/sdk/bin dist/sdk/runtime
          cp lang/dist/platform/elc          dist/sdk/bin/elc
          cp lang/dist/bin/elb               dist/sdk/bin/elb
          cp lang/dist/bin/epm               dist/sdk/bin/epm
          cp lang/el-compiler/runtime/el_runtime.c  dist/sdk/runtime/
          cp lang/el-compiler/runtime/el_runtime.h  dist/sdk/runtime/
          cp lang/runtime/*.el               dist/sdk/runtime/
          tar -czf dist/el-sdk-latest.tar.gz -C dist/sdk .
          echo "SDK tarball bundled: dist/el-sdk-latest.tar.gz"
          ls -lh dist/el-sdk-latest.tar.gz

      # Publish / update the `latest` release with all SDK assets
      - name: Publish latest release
        if: github.event_name == 'push'
        working-directory: ${{ github.workspace }}
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          GITEA_API: https://git.neuralplatform.ai/api/v1
          REPO: neuron-technologies/el
        run: |
          EXISTING_ID=$(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\": \"El SDK (latest)\",
              \"body\": \"Latest El SDK 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}"

          upload_asset() {
            local filepath="$1"
            local name="$2"
            echo "Uploading ${name}..."
            curl -sf -X POST \
              -H "Authorization: token ${GITEA_TOKEN}" \
              -F "attachment=@${filepath};filename=${name}" \
              "${GITEA_API}/repos/${REPO}/releases/${RELEASE_ID}/assets"
          }

          # Per-file assets (downstream CI needs these individually)
          upload_asset lang/dist/platform/elc                elc
          upload_asset lang/el-compiler/runtime/el_runtime.c el_runtime.c
          upload_asset lang/el-compiler/runtime/el_runtime.h el_runtime.h

          # SDK bundle and installer binary
          upload_asset dist/el-sdk-latest.tar.gz             el-sdk-latest.tar.gz
          upload_asset lang/dist/bin/el-install              el-install

          echo "Release published successfully"

      - name: Publish El SDK to Artifact Registry (prod)
        if: github.event_name == 'push'
        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

          VERSION="${GITEA_SHA:0:8}"

          gcloud artifacts generic upload \
            --repository=foundation-prod \
            --location=us-central1 \
            --project=neuron-785695 \
            --package=el/elc \
            --version="${VERSION}" \
            --source=dist/platform/elc

          gcloud artifacts generic upload \
            --repository=foundation-prod \
            --location=us-central1 \
            --project=neuron-785695 \
            --package=el/el_runtime.c \
            --version="${VERSION}" \
            --source=el-compiler/runtime/el_runtime.c

          gcloud artifacts generic upload \
            --repository=foundation-prod \
            --location=us-central1 \
            --project=neuron-785695 \
            --package=el/el_runtime.h \
            --version="${VERSION}" \
            --source=el-compiler/runtime/el_runtime.h

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

      - name: Dispatch el-sdk-updated to downstream repos
        if: github.event_name == 'push'
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          GITEA_API: https://git.neuralplatform.ai/api/v1
        run: |
          for repo in neuron-technologies/forge; do
            curl -sf -X POST \
              -H "Authorization: token ${GITEA_TOKEN}" \
              -H "Content-Type: application/json" \
              "${GITEA_API}/repos/${repo}/dispatches" \
              -d "{
                \"type\": \"el-sdk-updated\",
                \"inputs\": {\"el_version\": \"latest\", \"commit\": \"${GITHUB_SHA}\"}
              }" && echo "Dispatched to ${repo}" || echo "Warning: dispatch to ${repo} failed"
          done