name: Build & Publish Images

on:
  push:
    branches: [ main, dev ]
    tags: [ '*' ]
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_BACKEND: papercrate-dms/papercrate-backend
  IMAGE_FRONTEND: papercrate-dms/papercrate-frontend

jobs:
  publish:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Cache Cargo
        uses: actions/cache@v3
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            backend/target
          key: ${{ runner.os }}-cargo-${{ hashFiles('backend/Cargo.lock') }}
          restore-keys: |
            ${{ runner.os }}-cargo-

      - name: Install system dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y pkg-config libssl-dev libpq-dev zig

      - name: Install Rust targets and tools
        run: |
          rustup target add aarch64-unknown-linux-gnu
          cargo install cargo-zigbuild cross

      - name: Build backend binaries (amd64)
        working-directory: backend
        run: |
          cargo build --release --bin backend --bin worker --bin webdav --bin admin
          cargo install diesel_cli --no-default-features --features postgres --root target/diesel-amd64

      - name: Build backend binaries (arm64)
        working-directory: backend
        run: |
          cargo zigbuild --target aarch64-unknown-linux-gnu --release --bin backend --bin worker --bin webdav --bin admin
          cross install diesel_cli --no-default-features --features postgres --target aarch64-unknown-linux-gnu --root target/diesel-arm64

      - name: Prepare backend artifacts
        run: |
          set -eux
          mkdir -p build-artifacts/backend/amd64 build-artifacts/backend/arm64
          cp backend/target/release/backend build-artifacts/backend/amd64/papercrate-backend
          cp backend/target/release/worker build-artifacts/backend/amd64/papercrate-worker
          cp backend/target/release/webdav build-artifacts/backend/amd64/papercrate-webdav
          cp backend/target/release/admin build-artifacts/backend/amd64/papercrate-admin
          cp backend/target/diesel-amd64/bin/diesel build-artifacts/backend/amd64/diesel
          cp backend/target/aarch64-unknown-linux-gnu/release/backend build-artifacts/backend/arm64/papercrate-backend
          cp backend/target/aarch64-unknown-linux-gnu/release/worker build-artifacts/backend/arm64/papercrate-worker
          cp backend/target/aarch64-unknown-linux-gnu/release/webdav build-artifacts/backend/arm64/papercrate-webdav
          cp backend/target/aarch64-unknown-linux-gnu/release/admin build-artifacts/backend/arm64/papercrate-admin
          cp backend/target/diesel-arm64/bin/diesel build-artifacts/backend/arm64/diesel
          chmod +x build-artifacts/backend/*/*

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: 'npm'
          cache-dependency-path: frontend/package-lock.json

      - name: Install frontend dependencies
        working-directory: frontend
        run: npm ci --no-audit --no-fund

      - name: Build frontend
        working-directory: frontend
        run: npm run build

      - name: Compute image tags
        id: tags
        env:
          GITHUB_SHA: ${{ github.sha }}
          GITHUB_REF: ${{ github.ref }}
          REGISTRY: ${{ env.REGISTRY }}
        run: |
          SHORT_SHA=${GITHUB_SHA::7}
          TAGS=("$SHORT_SHA")

          BRANCH=${GITHUB_REF##*/}
          if [ "$BRANCH" = "dev" ]; then
            TAGS+=("${SHORT_SHA}-dev")
          fi

          if [[ "$GITHUB_REF" == refs/tags/* ]]; then
            TAGS+=("${GITHUB_REF#refs/tags/}")
          fi

          UNIQUE=()
          for tag in "${TAGS[@]}"; do
            [[ -z "$tag" ]] && continue
            skip=false
            for seen in "${UNIQUE[@]}"; do
              if [ "$tag" = "$seen" ]; then
                skip=true
                break
              fi
            done
            if [ "$skip" = false ]; then
              UNIQUE+=("$tag")
            fi
          done

          {
            echo "BASE_TAGS<<EOF"
            for tag in "${UNIQUE[@]}"; do
              printf '%s\n' "$tag"
            done
            echo "EOF"
            echo "BACKEND_TAGS<<EOF"
            for tag in "${UNIQUE[@]}"; do
              printf '%s\n' "$REGISTRY/$IMAGE_BACKEND:$tag"
            done
            echo "EOF"
            echo "FRONTEND_TAGS<<EOF"
            for tag in "${UNIQUE[@]}"; do
              printf '%s\n' "$REGISTRY/$IMAGE_FRONTEND:$tag"
            done
            echo "EOF"
          } >> "$GITHUB_ENV"

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: papercrate-dms
          password: ${{ secrets.GHCR_PAT }}

      - name: Build & push backend image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: backend/Dockerfile
          push: true
          platforms: linux/amd64,linux/arm64
          tags: ${{ env.BACKEND_TAGS }}
          cache-from: type=gha,scope=backend
          cache-to: type=gha,scope=backend,mode=max

      - name: Build & push frontend image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: frontend/Dockerfile
          push: true
          platforms: linux/amd64,linux/arm64
          tags: ${{ env.FRONTEND_TAGS }}
          cache-from: type=gha,scope=frontend
          cache-to: type=gha,scope=frontend,mode=max