name: CI

on:
  push:
  pull_request:

jobs:
  build:
    name: Build wasm engine
    runs-on: ubuntu-latest
    steps:
      - uses: https://github.com/actions/checkout@v4

      - name: Install build dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y bison cmake curl python3

      # Gitea Actions doesn't support the built-in hashFiles() expression
      # function (unlike GitHub Actions) - it silently evaluates to an empty
      # string, which turned every cache key below into the same constant
      # string regardless of what actually changed, so a cache entry from
      # before a dependency-version or patch change would still be reused
      # forever. Hash the same inputs by hand instead.
      - name: Compute cache keys
        id: cache-keys
        run: |
          echo "emsdk=$(sha256sum scripts/versions.sh | cut -d' ' -f1)" >> "$GITHUB_OUTPUT"
          echo "deps-wasm32=$(cat scripts/versions.sh $(find patches -type f | sort) | sha256sum | cut -d' ' -f1)" >> "$GITHUB_OUTPUT"
          echo "libwinevbs=$(cat scripts/versions.sh $(find patches/libwinevbs -type f | sort) | sha256sum | cut -d' ' -f1)" >> "$GITHUB_OUTPUT"

      - name: Cache emsdk
        uses: https://github.com/actions/cache@v4
        with:
          path: emsdk
          key: emsdk-${{ steps.cache-keys.outputs.emsdk }}

      - name: Cache wasm32 dependency builds
        uses: https://github.com/actions/cache@v4
        with:
          path: build/deps-wasm32
          key: deps-wasm32-${{ steps.cache-keys.outputs.deps-wasm32 }}

      - name: Cache libwinevbs build
        uses: https://github.com/actions/cache@v4
        with:
          path: vendor/libwinevbs/build
          key: libwinevbs-wasm32-${{ steps.cache-keys.outputs.libwinevbs }}

      - name: Setup (fetch + patch vendor sources)
        run: ./scripts/setup.sh

      - name: Build wasm32 dependencies
        run: |
          source emsdk/emsdk_env.sh
          ./scripts/build-deps.sh

      - name: Build vpinball
        run: |
          source emsdk/emsdk_env.sh
          ./scripts/build.sh

      - name: Verify build output
        run: |
          test -f dist/vpinball.wasm
          test -f dist/vpinball.js
          echo "Build artifacts present:"
          ls -la dist/

      - name: Build npm wrapper
        run: |
          npm install --no-save typescript
          npx tsc -p package/tsconfig.json

      # Everything below only runs on a tag push (a release) - reuses the
      # exact build just done above instead of the previous separate
      # "publish" job, which had `needs: build` but still redundantly
      # re-ran the *entire* checkout/cache/setup/build-deps/build/wrapper
      # pipeline from scratch, doubling CI time on every release for no
      # benefit (Gitea Actions' artifact-passing story is also awkward
      # here - upload-artifact@v4+/download-artifact@v4+ aren't supported
      # on Gitea at all, see the upload-artifact removal above).
      - name: Set package version from the tag
        if: startsWith(github.ref, 'refs/tags/')
        run: npm pkg set version="${GITHUB_REF_NAME#v}"

      # Scoped to this one registry host+path (via publishConfig.registry in
      # package.json) rather than actions/setup-node's registry-url, which
      # would set it as the *default* registry for every install.
      - name: Configure registry auth for publish
        if: startsWith(github.ref, 'refs/tags/')
        run: npm config set "//dev.pivoine.art/api/packages/valknar/npm/:_authToken" "$PACKAGE_TOKEN"
        env:
          PACKAGE_TOKEN: ${{ secrets.PACKAGE_TOKEN }}

      - name: Publish to Gitea npm registry
        if: startsWith(github.ref, 'refs/tags/')
        run: npm publish