name: Deploy instance

# This content repo owns its portal instance: which portal version runs,
# the service env, the systemd unit, and the Caddy route. The portal repo
# only publishes versioned release artifacts (uhhm/portal's Publish
# workflow); PORTAL_RELEASE below pins the one this site runs.
#
# Rolling out a new portal version = bumping PORTAL_RELEASE (a commit,
# so every rollout is auditable and revertable). Content-only changes
# never come through here - lint-and-reload hot-swaps those into the
# running instance over NATS.

on:
  workflow_dispatch:
  push:
    branches: [main]
    paths:
      - .gitea/workflows/deploy.yml

env:
  PORTAL_RELEASE: v0.3.1
  INSTANCE: redoal-portal

jobs:
  deploy:
    runs-on: bare
    steps:
      # Instance config comes from THIS repo's Actions variables/secrets
      # (Settings -> Actions) - not the portal repo's. Guard before
      # touching anything on the host: a missing secret must fail the
      # run, not silently write an empty value into the live env file.
      - name: Check instance secrets are configured
        run: |
          set -eu
          [ -n "${{ secrets.NATS_URL }}" ] || { echo "missing secret NATS_URL"; exit 1; }
          [ -n "${{ secrets.OAUTH2_CLIENT_SECRET }}" ] || { echo "missing secret OAUTH2_CLIENT_SECRET"; exit 1; }
          [ -n "${{ secrets.PORTAL_GITEA_API_TOKEN }}" ] || { echo "missing secret PORTAL_GITEA_API_TOKEN"; exit 1; }

      # uhhm/portal is public, so the asset download is anonymous. The
      # app@ template's ExecStart is /srv/app/%i/current/%i - the shipped
      # binary is named "portal", so link the instance name to it.
      - name: Ship pinned portal release
        run: |
          set -euo pipefail
          api="${{ github.server_url }}/api/v1/repos/uhhm/portal"
          url=$(curl -sf "$api/releases/tags/$PORTAL_RELEASE" | jq -r '.assets[0].browser_download_url')
          rel="/srv/app/$INSTANCE/releases/$PORTAL_RELEASE"
          rm -rf "$rel"
          mkdir -p "$rel"
          curl -sfL "$url" | tar -xz -C "$rel"
          ln -sfn portal "$rel/$INSTANCE"

      - name: Write service env
        run: |
          cat > /etc/app/$INSTANCE.env <<EOF
          NATS_URL=${{ secrets.NATS_URL }}
          KANIDM_URL=${{ vars.KANIDM_URL }}
          OAUTH2_CLIENT_ID=${{ vars.OAUTH2_CLIENT_ID }}
          OAUTH2_CLIENT_SECRET=${{ secrets.OAUTH2_CLIENT_SECRET }}
          PUBLIC_URL=${{ vars.PUBLIC_URL }}
          COOKIE_SECURE=true
          # This repo is its own instance's content source; branding
          # (title, wordmark, gesture hero + relay) rides in site.yaml.
          CONTENT_REPO=${{ github.server_url }}/${{ github.repository }}
          CONTENT_BRANCH=main
          LEPTOS_SITE_ADDR=0.0.0.0:3020
          # The release tarball carries the site bundle at site/ (no
          # target/ prefix), so override Cargo.toml's build-time path.
          LEPTOS_SITE_ROOT=site
          # Portal ships content-hashed pkg files (portal.<hash>.js) with
          # a hash.txt in the site root; this makes the server reference
          # them, so a stale cached bundle can never pair with new wasm.
          LEPTOS_HASH_FILES=true
          # Read-only Gitea token - here it also backs the
          # gitea_releases source for the private redoal/redoal repo,
          # so the owning user needs read access there.
          GITEA_API_TOKEN=${{ secrets.PORTAL_GITEA_API_TOKEN }}
          EOF

      # Activate only after the release and env are fully written, so a
      # failed download or missing config never takes the site down.
      #
      # No sudo: the runner's unit sets NoNewPrivileges=yes - systemctl
      # talks to PID1 over D-Bus, authorized by the polkit rule scoped
      # to deploy-runner + the app@* unit pattern.
      - name: Activate and restart
        run: |
          ln -sfn "/srv/app/$INSTANCE/releases/$PORTAL_RELEASE" /srv/app/$INSTANCE/current
          systemctl restart app@$INSTANCE.service

      # www redirects to the apex for the same single-cookie-scope
      # reason as uhhm's instance. The runner is in the docker group,
      # so no sudo here either.
      - name: Update Caddy routing
        run: |
          cat > /etc/caddy/services.d/$INSTANCE.caddy <<'EOF'
          www.redoal.com {
          	redir https://redoal.com{uri} permanent
          }

          redoal.com {
          	reverse_proxy host.docker.internal:3020
          	log {
          		output file /var/log/caddy/redoal.log
          	}
          }
          EOF
          docker exec caddy caddy reload --config /etc/caddy/Caddyfile --adapter caddyfile