name: Deploy marketing to Cloud Run

# Pipeline: build → stage → smoke test → prod
# Nothing reaches prod without passing the stage smoke test.

on:
  push:
    branches: [main]
    paths:
      - 'src/**'
      - 'dist/**'
      - 'runtime/**'
      - 'migrations/**'
      - 'Dockerfile.stage'
      - 'build-stage.sh'
      - '.gitea/workflows/deploy.yaml'

  workflow_dispatch:
    inputs:
      tag:
        description: 'Image tag to build and deploy (defaults to short SHA)'
        required: false
        type: string

jobs:
  deploy:
    runs-on: ubuntu-latest
    timeout-minutes: 60

    permissions:
      contents: read
      id-token: write   # needed for the OIDC token used by WIF

    steps:
      - name: Enforce stage-only source
        # main only accepts merges from stage. Direct pushes from other branches
        # are blocked by Gitea branch protection (enable_push=false for non-admins).
        # workflow_dispatch is exempt to allow manual prod redeploy.
        if: github.event_name != 'workflow_dispatch'
        run: |
          echo "Event: ${{ github.event_name }}, ref: ${{ github.ref }}"
          echo "Source branch enforcement: OK (protected by Gitea branch rules)"

      - name: Checkout neuron-web
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Detect change type
        id: changetype
        run: |
          set -euo pipefail
          CHANGED=$(git diff --name-only HEAD~1 HEAD 2>/dev/null || git diff --name-only HEAD 2>/dev/null || echo "unknown")
          echo "Changed files:"
          echo "$CHANGED"
          # Asset-only: files that don't require rebuilding the El binary.
          # migrations/, scripts/, tests/ are data/infra/test changes — no binary rebuild needed.
          NON_ASSET=$(echo "$CHANGED" | grep -v '^src/assets/' | grep -v '^src/shares/' | grep -v '^src/index\.html' | grep -v '^src/about\.html' | grep -v '^src/terms\.html' | grep -v '^src/enterprise-terms\.html' | grep -v '^src/llms\.txt' | grep -v '^migrations/' | grep -v '^scripts/' | grep -v '^tests/' | grep -v '^\.gitea/' | grep -v '^$' || true)
          if [ -z "$NON_ASSET" ] && [ "$CHANGED" != "unknown" ]; then
            echo "asset_only=true" >> "$GITHUB_OUTPUT"
            echo "=> Asset-only change detected, will use fast path"
          else
            echo "asset_only=false" >> "$GITHUB_OUTPUT"
            echo "=> Full build required"
          fi

      - name: Authenticate to GCP
        id: auth
        uses: google-github-actions/auth@v2
        with:
          # Gitea Actions doesn't currently inject ACTIONS_ID_TOKEN_REQUEST_TOKEN,
          # so the WIF (workload_identity_provider + service_account) path fails
          # at runtime — google-github-actions/auth needs that env var to mint
          # a Gitea OIDC token. Fall back to the JSON SA key for now. The WIF
          # provider + IAM bindings remain in Terraform so we can flip back
          # once Gitea closes the gap (or once we wire act_runner into a
          # custom OIDC issuer).
          credentials_json: ${{ secrets.GCP_SA_KEY }}

      - name: Set up gcloud SDK
        uses: google-github-actions/setup-gcloud@v2
        with:
          project_id: neuron-785695

      - name: Run database migrations
        # Applies any pending migrations in migrations/*.sql to the Supabase DB.
        # Runs unconditionally (asset-only or full build) so the schema is always
        # current before the new code is deployed.
        run: python3 scripts/run_migrations.py

      - name: Configure docker auth for Artifact Registry
        run: gcloud auth configure-docker us-central1-docker.pkg.dev --quiet

      - name: Compute image tag
        id: tag
        run: |
          TAG="${{ inputs.tag }}"
          if [ -z "$TAG" ]; then TAG="ci-${GITHUB_SHA:0:8}"; fi
          IMAGE="us-central1-docker.pkg.dev/neuron-785695/neuron-marketing/marketing:${TAG}"
          echo "tag=${TAG}"     >> "$GITHUB_OUTPUT"
          echo "image=${IMAGE}" >> "$GITHUB_OUTPUT"
          echo "Will build and push: ${IMAGE}"

      - name: Touch HTML placeholder files
        # El binary regenerates these at startup via fs_write. They must exist
        # in the build context for Dockerfile COPY to succeed.
        run: touch src/index.html src/about.html src/terms.html src/enterprise-terms.html

      # ── El SDK setup ──────────────────────────────────────────────────────

      - name: Extract El SDK from ci-base
        if: steps.changetype.outputs.asset_only != 'true'
        run: |
          set -euo pipefail
          docker pull us-central1-docker.pkg.dev/neuron-785695/neuron-ci/ci-base:latest
          CID=$(docker create us-central1-docker.pkg.dev/neuron-785695/neuron-ci/ci-base:latest)
          sudo mkdir -p /opt/el
          docker cp "$CID:/opt/el" /opt/
          docker rm "$CID"
          echo "ELB=/opt/el/dist/bin/elb"              >> "$GITHUB_ENV"
          echo "ELC=/opt/el/dist/platform/elc"          >> "$GITHUB_ENV"
          echo "EL_RUNTIME=/opt/el/el-compiler/runtime" >> "$GITHUB_ENV"

      # ── Build neuron-web binary ───────────────────────────────────────────

      - name: Build neuron-web with elb
        if: steps.changetype.outputs.asset_only != 'true'
        run: |
          set -euo pipefail
          "$ELB" \
            --elc="$ELC" \
            --runtime="$EL_RUNTIME"
          echo "Binary: $(ls -lh dist/neuron-landing)"

      # ── Compile JS client sources ─────────────────────────────────────────

      - name: Compile JS El sources
        if: steps.changetype.outputs.asset_only != 'true'
        run: |
          set -euo pipefail
          cp "$EL_RUNTIME/el_runtime.js" src/js/
          mkdir -p dist/js
          for f in src/js/*.el; do
            [ -f "$f" ] || continue
            name=$(basename "$f" .el)
            "$ELC" --target=js --bundle --minify --obfuscate "$f" > "dist/js/${name}.js"
            echo "  compiled: $f -> dist/js/${name}.js"
          done
          rm -f src/js/el_runtime.js

      # ── Docker build + push ───────────────────────────────────────────────

      - name: Build and tag image
        if: steps.changetype.outputs.asset_only != 'true'
        run: |
          set -euo pipefail
          docker build \
            --build-arg BUILDKIT_INLINE_CACHE=1 \
            --cache-from us-central1-docker.pkg.dev/neuron-785695/neuron-marketing/marketing:latest \
            -f Dockerfile.stage \
            -t "marketing:${{ steps.tag.outputs.tag }}" \
            .
          docker tag "marketing:${{ steps.tag.outputs.tag }}" "${{ steps.tag.outputs.image }}"
          docker tag "marketing:${{ steps.tag.outputs.tag }}" "us-central1-docker.pkg.dev/neuron-785695/neuron-marketing/marketing:latest"

      - name: Push image
        if: steps.changetype.outputs.asset_only != 'true'
        run: |
          docker push "${{ steps.tag.outputs.image }}"
          docker push "us-central1-docker.pkg.dev/neuron-785695/neuron-marketing/marketing:latest"

      - name: Asset-only fast build
        if: steps.changetype.outputs.asset_only == 'true'
        env:
          IMAGE: ${{ steps.tag.outputs.image }}
        run: |
          set -euo pipefail
          # Pull existing image as base - no El compilation needed
          LATEST="us-central1-docker.pkg.dev/neuron-785695/neuron-marketing/marketing:latest"
          docker pull "$LATEST"
          # Build tiny patch image: just replace the assets layer
          cat > /tmp/Dockerfile.assets <<'EOF'
          ARG BASE
          FROM ${BASE}
          COPY src/assets /srv/landing/assets
          COPY src/shares /srv/landing/shares
          EOF
          # Plain `docker build` — the gitea runner ships docker without
          # the buildx plugin, so `docker buildx build --platform ...`
          # exits 125 ("unknown flag: --platform"). The runner host is
          # already linux/amd64 so cross-platform isn't needed here.
          docker build \
            --build-arg BASE="$LATEST" \
            -f /tmp/Dockerfile.assets \
            -t "marketing:${{ steps.tag.outputs.tag }}" \
            -t "$IMAGE" \
            -t "${LATEST%:*}:latest" \
            .
          docker push "$IMAGE"
          docker push "${LATEST%:*}:latest"
          echo "Fast asset build complete"

      # ── Stage deployment ──────────────────────────────────────────────────────
      # marketing-stage is a single-region Cloud Run service (us-central1).
      # It uses stage-specific Stripe keys (sk_test_...) so checkout can be
      # exercised safely. Prod deploy only runs after the smoke test below passes.
      #
      # --update-env-vars / --update-secrets merges with existing config so
      # any manually-set values on the service are preserved across deploys.

      - name: Deploy to marketing-stage
        id: deploy-stage
        env:
          IMAGE: ${{ steps.tag.outputs.image }}
        run: |
          set -euo pipefail

          gcloud run deploy marketing-stage \
            --image "$IMAGE" \
            --region us-central1 \
            --project neuron-785695 \
            --execution-environment gen2 \
            --service-account neuron-marketing-sa@neuron-785695.iam.gserviceaccount.com \
            --update-env-vars "NODE_ENV=production,STRIPE_PUBLISHABLE_KEY=pk_test_51TPoHnJg9Fv1D3AUp1FEMcy4MGlKRZqs4scW66kjQFQjWofmNc2rottzXzDaXekHvuw1OQpyp2WCIsc7O5fXIG0G00HQQrkdGX,GCS_SHARE_BUCKET=neuron-shares-prod,SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6Im9jb2pzZ2hhb25sdHVuaWRrenB3Iiwicm9sZSI6ImFub24iLCJpYXQiOjE3Nzc2NDIxNjgsImV4cCI6MjA5MzIxODE2OH0.e0FVFw1aahnrBVvnkR5R8a-RxCx095U8o_gsk7Quq3E,NEURON_LLM_0_FORMAT=anthropic,NEURON_LLM_0_MODEL=claude-sonnet-4-5,NEURON_LLM_0_URL=https://api.anthropic.com/v1/messages" \
            --update-secrets "SUPABASE_SERVICE_KEY=supabase-service-key:latest,NEURON_LLM_0_KEY=anthropic-api-key:latest,ANTHROPIC_API_KEY=anthropic-api-key:latest,STRIPE_SECRET_KEY=stripe-secret-key-stage:latest,STRIPE_WEBHOOK_SECRET=stripe-webhook-secret-stage:latest,STRIPE_PRICE_PROFESSIONAL=stripe-price-professional-stage:latest,STRIPE_PRICE_FOUNDING=stripe-price-founding-stage:latest,STRIPE_PRICE_FAMILY_CHILD=stripe-price-family-child:latest,RESEND_API_KEY=resend-api-key:latest,DOCUSEAL_WEBHOOK_TOKEN=docuseal-webhook-token:latest" \
            --allow-unauthenticated \
            --quiet

          # Get the stable Cloud Run URL and ensure NEURON_ORIGIN is set correctly.
          # --update-env-vars is idempotent: no new revision is created if the
          # value is already correct (i.e. on every deploy after the first).
          STAGE_URL=$(gcloud run services describe marketing-stage \
            --region us-central1 --project neuron-785695 \
            --format 'value(status.url)')
          echo "stage_url=${STAGE_URL}" >> "$GITHUB_OUTPUT"
          echo "Stage URL: ${STAGE_URL}"

          gcloud run services update marketing-stage \
            --region us-central1 --project neuron-785695 \
            --execution-environment gen2 \
            --update-env-vars "NEURON_ORIGIN=${STAGE_URL}" \
            --quiet

      - name: Smoke test stage
        run: |
          set -euo pipefail
          STAGE_URL="${{ steps.deploy-stage.outputs.stage_url }}"
          echo "Smoke testing stage: ${STAGE_URL}"

          # Poll up to 90s — container cold-start + El page compilation can take ~20s
          for i in $(seq 1 18); do
            STATUS=$(curl -sSo /dev/null -w "%{http_code}" --max-time 15 "${STAGE_URL}/" || echo "000")
            echo "Attempt ${i}/18: HTTP ${STATUS}"
            if [ "$STATUS" = "200" ]; then
              echo "Stage smoke test PASSED"
              exit 0
            fi
            sleep 5
          done

          echo "Stage smoke test FAILED — aborting prod deploy"
          exit 1

      # ── Prod deployment ───────────────────────────────────────────────────────
      # Only runs if the stage smoke test above passed.

      - name: Deploy to all marketing prod regions in parallel
        env:
          IMAGE: ${{ steps.tag.outputs.image }}
        run: |
          set -euo pipefail
          deploy() {
            local region="$1" svc="$2"
            gcloud run deploy "$svc" \
              --image "$IMAGE" \
              --region "$region" \
              --project neuron-785695 \
              --execution-environment gen2 \
              --quiet
          }
          deploy us-central1     marketing-prod-us   &
          deploy europe-west1    marketing-prod-eu   &
          deploy asia-northeast1 marketing-prod-apac &
          wait

      - name: Flip traffic to latest revision
        run: |
          set -euo pipefail
          for r in us-central1:marketing-prod-us europe-west1:marketing-prod-eu asia-northeast1:marketing-prod-apac; do
            REGION="${r%%:*}"; SVC="${r##*:}"
            gcloud run services update-traffic "$SVC" \
              --region "$REGION" --project neuron-785695 \
              --to-latest --quiet
          done

      - name: Smoke check production endpoints
        run: |
          set -euo pipefail
          for url in \
            https://neurontechnologies.ai/ \
            https://www.neurontechnologies.ai/ ; do
            echo "GET $url"
            curl -sSI "$url" | head -3
          done
          echo "Deployed tag: ${{ steps.tag.outputs.tag }}"