# Continuous integration.
#
# Runs on every push and pull request. The job is deliberately one sequence
# rather than a fan-out: this is a small project, the whole thing takes a
# couple of minutes, and a single log is easier to read than five.
#
# What it actually proves, in order of how likely each is to catch something:
#
#   1. Every package typechecks.
#   2. The migration chain applies to a REAL, empty Postgres. This has already
#      caught one migration that Drizzle generated but Postgres refused
#      (a jsonb -> integer cast with no USING clause).
#   3. The seed is idempotent — running it twice leaves the same row counts.
#      This caught a seed that silently duplicated 27 contacts.
#   4. The unit tests pass.
#   5. The server boots against that database and answers.
#   6. The front end builds, and the CSP hash for the inline theme script still
#      matches what the proxy is configured to allow. Editing that script
#      changes its hash, and the failure mode is a silent white flash for
#      dark-mode users rather than an error.

name: CI

on:
  push:
    branches: [main]
  pull_request:

jobs:
  verify:
    runs-on: ubuntu-latest

    # Postgres is started as a step rather than through `services:`.
    #
    # The runner here does not put service containers on the job's network, so
    # `services:` yields "getaddrinfo EAI_AGAIN postgres". Sharing the job
    # container's own network namespace (`--network container:$HOSTNAME`) puts
    # Postgres on 127.0.0.1 and works regardless of how the runner is
    # configured — which matters because this runner is shared with other
    # repositories and should not have to be reconfigured to suit this one.
    env:
      DATABASE_URL: postgres://pig:pig@127.0.0.1:5432/pig
      PG_CONTAINER: pig-ci-pg-${{ github.run_id }}

    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: '22'

      - name: Start Postgres
        run: |
          docker rm -f "$PG_CONTAINER" 2>/dev/null || true
          docker run -d --name "$PG_CONTAINER" \
            --network "container:$(cat /etc/hostname)" \
            -e POSTGRES_USER=pig -e POSTGRES_PASSWORD=pig -e POSTGRES_DB=pig \
            postgres:16-alpine
          for i in $(seq 1 60); do
            if docker exec "$PG_CONTAINER" pg_isready -U pig -q; then
              echo "Postgres ready after ${i}s"; exit 0
            fi
            sleep 1
          done
          echo "Postgres did not become ready"
          docker logs "$PG_CONTAINER" | tail -30
          exit 1

      - name: Install
        run: npm install --no-audit --no-fund

      - name: Typecheck every package
        run: |
          npx tsc --noEmit -p packages/core/tsconfig.json
          npx tsc --noEmit -p packages/db/tsconfig.json
          npx tsc --noEmit -p packages/prime/tsconfig.json
          npx tsc --noEmit -p apps/api/tsconfig.json
          npx tsc --noEmit -p apps/web/tsconfig.json
          npx tsc --noEmit -p apps/mcp/tsconfig.json

      - name: Unit tests
        run: npm test --workspaces --if-present

      - name: Migrations apply to a real Postgres
        run: npx tsx packages/db/src/migrate.ts

      - name: Migrations are re-runnable
        run: npx tsx packages/db/src/migrate.ts

      - name: Seed is idempotent
        # A seed that duplicates on a second run corrupts any database it is
        # pointed at twice, and nobody notices until the counts look odd.
        run: |
          npx tsx packages/db/src/seed/index.ts > /dev/null
          count() { docker exec "$PG_CONTAINER" psql -U pig -d pig -tAc "select count(*) from contacts"; }
          BEFORE=$(count)
          npx tsx packages/db/src/seed/index.ts > /dev/null
          AFTER=$(count)
          echo "contacts: $BEFORE -> $AFTER"
          test "$BEFORE" = "$AFTER" || { echo "SEED IS NOT IDEMPOTENT"; exit 1; }

      - name: Server boots and answers
        run: |
          NODE_ENV=development PIG_PORT=8930 npx tsx apps/api/src/server.ts &
          for i in $(seq 1 30); do
            curl -sf http://127.0.0.1:8930/api/health && break
            sleep 1
          done
          curl -sf http://127.0.0.1:8930/api/health | grep -q '"ok":true'

      - name: Front end builds
        run: npm run build -w @pig/web

      - name: Inline theme script still matches the deployed CSP hash
        # The proxy allows exactly one inline script by hash. If the script
        # changes and the CSP is not updated, dark-mode users get a white flash
        # on every load and nothing anywhere reports an error.
        run: |
          node -e "
            const fs=require('fs'), crypto=require('crypto');
            const html=fs.readFileSync('apps/web/dist/index.html','utf8');
            const m=html.match(/<script>([\s\S]*?)<\/script>/);
            if(!m){ console.error('No inline script found in index.html'); process.exit(1); }
            const hash='sha256-'+crypto.createHash('sha256').update(m[1]).digest('base64');
            const expected='sha256-1tTDwCq+TCEyPDSZeYqW5HbmP+unUg8hrgRiZBiH/IU=';
            if(hash!==expected){
              console.error('Inline script hash changed.');
              console.error('  now:      '+hash);
              console.error('  expected: '+expected);
              console.error('Update the CSP in deploy/Caddyfile.example AND on the server,');
              console.error('then update the expected hash in this workflow.');
              process.exit(1);
            }
            console.log('CSP hash unchanged: '+hash);
          "

      - name: Docker image builds
        run: docker build -t pig:ci .

      - name: Stop Postgres
        if: always()
        run: docker rm -f "$PG_CONTAINER" 2>/dev/null || true