name: Build Multi-Platform Binaries

on:
  push:
    paths:
      - '**.go'
      - 'go.mod'
      - 'go.sum'
      - 'web/**'
      - '.gitea/workflows/**'

jobs:
  # =======================
  # Frontend Build
  # =======================
  build-frontend:
    runs-on: node-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Build Frontend
        run: |
          cd web
          npm ci
          npm run build

      - name: Upload Frontend Artifact
        uses: actions/upload-artifact@v3
        with:
          name: frontend-dist
          path: web/dist
          retention-days: 1

  # =======================
  # Backend Build Matrix
  # =======================
  build-binaries:
    needs: build-frontend
    runs-on: golang-latest

    strategy:
      fail-fast: false
      matrix:
        include:
          # ---------- Linux amd64 ----------
          - goos: linux
            goarch: amd64
            target: server
            upx: true

          - goos: linux
            goarch: amd64
            target: client
            upx: true

          # ---------- Linux arm64 ----------
          - goos: linux
            goarch: arm64
            target: server
            upx: true

          - goos: linux
            goarch: arm64
            target: client
            upx: true

          # ---------- Linux ARMv7 / ARMv8l ----------
          - goos: linux
            goarch: arm
            goarm: 7
            target: server
            upx: false

          - goos: linux
            goarch: arm
            goarm: 7
            target: client
            upx: false

          # ---------- (Optional) ARMv6 ----------
          - goos: linux
            goarch: arm
            goarm: 6
            target: client
            upx: false

          # ---------- macOS ----------
          - goos: darwin
            goarch: amd64
            target: server
            upx: false

          - goos: darwin
            goarch: arm64
            target: server
            upx: false

          # ---------- Windows ----------
          - goos: windows
            goarch: amd64
            target: server
            upx: true

          - goos: windows
            goarch: amd64
            target: client
            upx: true

          - goos: windows
            goarch: arm64
            target: server
            upx: true

          - goos: windows
            goarch: arm64
            target: client
            upx: true

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      # ---------- Download frontend ----------
      - name: Download Frontend Artifact
        uses: actions/download-artifact@v4
        with:
          name: frontend-dist
          path: internal/server/app/dist

      # ---------- Build ----------
      - name: Build Binary
        env:
          GOOS: ${{ matrix.goos }}
          GOARCH: ${{ matrix.goarch }}
          GOARM: ${{ matrix.goarm }}
          CGO_ENABLED: 0
        run: |
          set -e

          OUTPUT_NAME="${{ matrix.target }}-${{ matrix.goos }}-${{ matrix.goarch }}"

          if [ "${{ matrix.goarch }}" = "arm" ]; then
            OUTPUT_NAME="${OUTPUT_NAME}v${{ matrix.goarm }}"
          fi

          if [ "${{ matrix.goos }}" = "windows" ]; then
            OUTPUT_NAME="${OUTPUT_NAME}.exe"
          fi

          echo "Building $OUTPUT_NAME"

          go build \
            -trimpath \
            -ldflags="-s -w" \
            -o "$OUTPUT_NAME" \
            ./cmd/${{ matrix.target }}

          echo "BINARY_NAME=$OUTPUT_NAME" >> $GITHUB_ENV

      # ---------- UPX (safe only) ----------
      - name: Install and Run UPX
        if: matrix.upx == true && matrix.goarch != 'arm'
        run: |
          if command -v apk >/dev/null; then
            apk add --no-cache upx
          else
            apt-get update && apt-get install -y upx-ucl
          fi

          upx -9 "${{ env.BINARY_NAME }}" || true

      # ---------- Upload ----------
      - name: Upload Binary
        uses: actions/upload-artifact@v4
        with:
          name: ${{ env.BINARY_NAME }}
          path: ${{ env.BINARY_NAME }}