name: Build Backend

on:
  push:
    branches: [main]
    paths:
      - 'grpc-backend/**'
  pull_request:
    paths:
      - 'grpc-backend/**'
  workflow_dispatch:

jobs:
  build-backend:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          submodules: recursive
          fetch-depth: 0

      - name: Install Protobuf
        run: |
          curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v21.12/protoc-21.12-linux-x86_64.zip
          unzip protoc-21.12-linux-x86_64.zip -d protoc3
          sudo mv protoc3/bin/* /usr/local/bin/
          sudo mv protoc3/include/* /usr/local/include/
          rm -rf protoc*

      - name: Install protoc-gen plugins
        run: |
          go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
          go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
          go install github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-grpc-gateway@latest
          go install github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2@latest
          echo "$(go env GOPATH)/bin" >> $GITHUB_PATH

      - name: Generate protobuf code
        run: |
          protoc \
            -I grpc-backend/proto \
            -I grpc-backend/googleapis \
            --go_out=grpc-backend/gen --go_opt=paths=source_relative \
            --go-grpc_out=grpc-backend/gen --go-grpc_opt=paths=source_relative \
            --grpc-gateway_out=grpc-backend/gen --grpc-gateway_opt=paths=source_relative \
            --openapiv2_out=grpc-backend/gen/swagger \
            grpc-backend/proto/osu_music.proto

      - name: Build osu-server binary
        working-directory: grpc-backend
        run: go build -o osu-server .

      - name: Upload osu-server binary artifact
        uses: actions/upload-artifact@v4
        with:
          name: osu-server
          path: grpc-backend/osu-server