name: Builds

on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master
  workflow_dispatch:

permissions:
  contents: write

jobs:
  build:
    name: Build (${{ matrix.target }})
    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-latest
            target: x86_64-unknown-linux-gnu
            artifact_name: pacman
            toolchain: 1.86.0
          - os: macos-15-intel
            target: x86_64-apple-darwin
            artifact_name: pacman
            toolchain: 1.86.0
          - os: macos-15
            target: aarch64-apple-darwin
            artifact_name: pacman
            toolchain: 1.86.0
          - os: windows-latest
            target: x86_64-pc-windows-gnu
            artifact_name: pacman.exe
            toolchain: 1.86.0
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Setup Rust Toolchain
        uses: dtolnay/rust-toolchain@master
        with:
          target: ${{ matrix.target }}
          toolchain: ${{ matrix.toolchain }}

      - name: Rust Cache
        uses: Swatinem/rust-cache@v2

      - name: Cache cargo-vcpkg (Non-macOS)
        if: runner.os != 'macOS'
        uses: actions/cache@v4
        with:
          path: target/vcpkg
          key: A-vcpkg-${{ runner.os }}-${{ matrix.target }}-${{ hashFiles('Cargo.toml', 'Cargo.lock') }}
          restore-keys: |
            A-vcpkg-${{ runner.os }}-${{ matrix.target }}-

      - name: Cache vcpkg (macOS)
        if: runner.os == 'macOS'
        uses: actions/cache@v4
        with:
          path: |
            ${{ github.workspace }}/vcpkg/installed
            ${{ github.workspace }}/vcpkg/packages
          key: vcpkg-2025.10.17-${{ matrix.target }}
          restore-keys: |
            vcpkg-2025.10.17-

      - name: Vcpkg Linux Dependencies
        if: runner.os == 'Linux'
        run: |
          sudo apt-get update
          sudo apt-get install -y libltdl-dev

      - name: Setup vcpkg (macOS)
        if: runner.os == 'macOS'
        run: |
          # Clone vcpkg at latest stable release
          git clone https://github.com/microsoft/vcpkg.git ${{ github.workspace }}/vcpkg
          cd ${{ github.workspace }}/vcpkg
          git checkout 2025.10.17

          # Bootstrap vcpkg
          ./bootstrap-vcpkg.sh -disableMetrics

          # Determine triplet based on target
          if [ "${{ matrix.target }}" = "aarch64-apple-darwin" ]; then
            TRIPLET="arm64-osx"
          else
            TRIPLET="x64-osx"
          fi

          # Install SDL2 packages
          ./vcpkg install sdl2 sdl2-image sdl2-ttf sdl2-gfx sdl2-mixer --triplet=$TRIPLET

          # Set VCPKG_ROOT for rust-sdl2 to find it
          echo "VCPKG_ROOT=${{ github.workspace }}/vcpkg" >> $GITHUB_ENV

      - name: Vcpkg (Non-macOS)
        if: runner.os != 'macOS'
        run: |
          cargo install cargo-vcpkg
          cargo vcpkg -v build
        working-directory: pacman

      - name: Build
        run: cargo build --release
        working-directory: pacman

      - name: Acquire Package Version
        id: get_version
        shell: bash # required to prevent Windows runners from failing
        run: |
          set -euo pipefail # exit on error
          echo "version=$(cargo metadata --format-version 1 --no-deps | jq '.packages[0].version' -r)" >> $GITHUB_OUTPUT
        working-directory: pacman

      - name: Upload Artifact
        uses: actions/upload-artifact@v4
        with:
          name: "pacman-${{ steps.get_version.outputs.version }}-${{ matrix.target }}"
          path: ./target/release/${{ matrix.artifact_name }}
          retention-days: 7
          if-no-files-found: error

  wasm:
    name: Build (wasm32-unknown-emscripten)
    runs-on: ubuntu-latest
    permissions:
      pages: write
      id-token: write
    # concurrency group is used to prevent multiple page deployments from being attempted at the same time
    concurrency:
      group: ${{ github.workflow }}-wasm

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Setup Emscripten SDK
        uses: pyodide/setup-emsdk@v15
        with:
          version: 3.1.43
          actions-cache-folder: "emsdk-cache-b"

      - name: Setup Rust (WASM32 Emscripten)
        uses: dtolnay/rust-toolchain@master
        with:
          target: wasm32-unknown-emscripten
          toolchain: 1.86.0

      - name: Rust Cache
        uses: Swatinem/rust-cache@v2

      - name: Setup Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: latest

      - name: Build with Emscripten
        shell: bash
        run: |
          # Retry mechanism for Emscripten build - only retry on specific hash errors
          MAX_RETRIES=3
          RETRY_DELAY=30

          for attempt in $(seq 1 $MAX_RETRIES); do
            echo "Build attempt $attempt of $MAX_RETRIES"

            # Capture output and check for specific error while preserving real-time output
            if bun run -i pacman/web.build.ts 2>&1 | tee /tmp/build_output.log; then
              echo "Build successful on attempt $attempt"
              break
            else
              echo "Build failed on attempt $attempt"

              # Check if the failure was due to the specific hash error
              if grep -q "emcc: error: Unexpected hash:" /tmp/build_output.log; then
                echo "::warning::Detected 'emcc: error: Unexpected hash:' error - will retry (attempt $attempt of $MAX_RETRIES)"

                if [ $attempt -eq $MAX_RETRIES ]; then
                  echo "::error::All retry attempts failed. Exiting with error."
                  exit 1
                fi

                echo "Waiting $RETRY_DELAY seconds before retry..."
                sleep $RETRY_DELAY

                # Exponential backoff: double the delay for next attempt
                RETRY_DELAY=$((RETRY_DELAY * 2))
              else
                echo "Build failed but not due to hash error - not retrying"
                exit 1
              fi
            fi
          done

      - name: Upload Artifact
        uses: actions/upload-pages-artifact@v4
        if: github.ref == 'refs/heads/master' && github.event_name == 'push'
        with:
          path: "./dist/"
          retention-days: 7

      - name: Deploy
        if: github.ref == 'refs/heads/master' && github.event_name == 'push'
        uses: actions/deploy-pages@v4