name: CI with Native Libraries

on:
  push:
    branches: [main, master]
    paths-ignore:
      - 'docs/**'
      - 'README.md'
      - 'CHANGELOG.md'
      - '**/*.md'
  pull_request:
    branches: [main, master]
    paths-ignore:
      - 'docs/**'
      - 'README.md'
      - 'CHANGELOG.md'
      - '**/*.md'
  workflow_dispatch:
    # Manual trigger for debugging native builds

# Global timeout - fail fast if hanging
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  # Pre-flight check to ensure build environment is ready
  check-environment:
    name: Check Build Environment
    runs-on: self-hosted
    timeout-minutes: 5
    
    steps:
      - name: Install Build Dependencies
        run: |
          echo "Installing build dependencies..."
          
          # Detect OS and install dependencies
          if [[ "$OSTYPE" == "linux-gnu"* ]]; then
            if command -v apt-get &> /dev/null; then
              echo "Detected Debian/Ubuntu - installing cmake, zlib, build-essential..."
              sudo apt-get update
              sudo apt-get install -y cmake zlib1g-dev build-essential
            elif command -v yum &> /dev/null; then
              echo "Detected RHEL/CentOS - installing cmake, zlib, gcc-c++..."
              sudo yum install -y cmake zlib-devel gcc-c++
            else
              echo "WARNING: Unknown package manager. Please install manually:"
              echo "  - cmake"
              echo "  - zlib development headers"
              echo "  - C++ compiler (g++ or clang++)"
            fi
          elif [[ "$OSTYPE" == "darwin"* ]]; then
            echo "Detected macOS - checking for Homebrew..."
            if ! command -v brew &> /dev/null; then
              echo "ERROR: Homebrew not found. Install from https://brew.sh"
              exit 1
            fi
            echo "Installing cmake, zlib via Homebrew..."
            brew install cmake zlib
          else
            echo "WARNING: Unknown OS. Please install manually:"
            echo "  - cmake"
            echo "  - zlib development headers"
            echo "  - C++ compiler (g++ or clang++)"
          fi
          
          echo "Dependencies installed."
      
      - name: Check CMake Available
        run: |
          if ! command -v cmake &> /dev/null; then
            echo "❌ ERROR: cmake is not installed"
            echo ""
            echo "To fix this on your self-hosted runner:"
            echo "  Ubuntu/Debian: sudo apt-get install -y cmake zlib1g-dev"
            echo "  macOS: brew install cmake zlib"
            echo "  CentOS/RHEL: sudo yum install -y cmake zlib-devel"
            echo ""
            echo "Or add this to your runner setup script."
            exit 1
          fi
          echo "cmake: $(cmake --version | head -1)"
      
      - name: Check C++ Compiler
        run: |
          if ! command -v g++ &> /dev/null && ! command -v clang++ &> /dev/null; then
            echo "No C++ compiler found (g++ or clang++)"
            echo ""
            echo "To fix this:"
            echo "  Ubuntu/Debian: sudo apt-get install -y build-essential"
            echo "  macOS: xcode-select --install"
            exit 1
          fi
          echo "C++ compiler available"
      
      - name: Check Zlib
        run: |
          if pkg-config --exists zlib 2>/dev/null || [ -f /usr/include/zlib.h ] || [ -f /usr/local/include/zlib.h ]; then
            echo "zlib development headers found"
          else
            echo "zlib headers not found - native build may fail"
            echo "  Install: sudo apt-get install -y zlib1g-dev || brew install zlib"
          fi

  test-native:
    name: Build and Test Native Libraries
    runs-on: self-hosted
    needs: check-environment
    timeout-minutes: 30

    services:
      redis:
        image: redis:7-alpine
        ports:
          - 6379:6379
        options: >-
          --health-cmd "redis-cli ping"
          --health-interval 5s
          --health-timeout 3s
          --health-retries 3
    
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 1

      - name: Cache native libraries
        uses: actions/cache@v4
        with:
          path: |
            native/build/
          key: ${{ runner.os }}-native-${{ hashFiles('native/**/*.cpp', 'native/**/*.h', 'native/**/CMakeLists.txt') }}
          restore-keys: |
            ${{ runner.os }}-native-

      - name: Cache apt packages
        uses: actions/cache@v4
        with:
          path: /var/cache/apt/archives
          key: ${{ runner.os }}-apt-native-${{ hashFiles('.forgejo/workflows/*.yml') }}
          restore-keys: |
            ${{ runner.os }}-apt-

      - name: Install cmake and build tools
        run: |
          echo "Installing cmake and build dependencies..."
          if [[ "$OSTYPE" == "linux-gnu"* ]]; then
            if command -v apt-get &> /dev/null; then
              sudo apt-get update
              sudo apt-get install -y cmake zlib1g-dev build-essential
            elif command -v yum &> /dev/null; then
              sudo yum install -y cmake zlib-devel gcc-c++
            fi
          elif [[ "$OSTYPE" == "darwin"* ]]; then
            brew install cmake zlib
          fi
          which cmake
      
      - name: Setup Go
        run: |
          REQUIRED_GO="1.23.4"
          if command -v go &> /dev/null && go version | grep -q "go${REQUIRED_GO}"; then
            echo "Go ${REQUIRED_GO} already installed - skipping download"
          else
            echo "Installing Go ${REQUIRED_GO}..."
            if [[ "$OSTYPE" == "linux-gnu"* ]]; then
              curl -sL "https://go.dev/dl/go${REQUIRED_GO}.linux-amd64.tar.gz" | sudo tar -C /usr/local -xzf -
            elif [[ "$OSTYPE" == "darwin"* ]]; then
              curl -sL "https://go.dev/dl/go${REQUIRED_GO}.darwin-amd64.tar.gz" | sudo tar -C /usr/local -xzf -
            fi
            export PATH="/usr/local/go/bin:$PATH"
            echo "/usr/local/go/bin" >> $GITHUB_PATH
            echo "Go ${REQUIRED_GO} installed"
          fi
          go version
      
      - name: Build Native Libraries
        run: |
          echo "Building native C++ libraries..."
          make native-build 2>&1
          if [ $? -ne 0 ]; then
            echo ""
            echo "Native build failed!"
            echo ""
            echo "Common causes:"
            echo "  1. Missing cmake: Install with 'apt-get install cmake' or 'brew install cmake'"
            echo "  2. Missing C++ compiler: Install with 'apt-get install build-essential'"
            echo "  3. Missing zlib: Install with 'apt-get install zlib1g-dev'"
            echo "  4. CMakeLists.txt not found: Ensure native/CMakeLists.txt exists"
            echo ""
            echo "Check the detailed error above for more information."
            exit 1
          fi
          echo "Native libraries built successfully"
      
      - name: Test with Native Libraries
        run: |
          echo "Running tests WITH native libraries enabled..."
          CGO_ENABLED=1 go test -tags native_libs -v ./tests/...
        continue-on-error: true
      
      - name: Native Smoke Test
        run: |
          echo "Running native libraries smoke test..."
          CGO_ENABLED=1 go test -tags native_libs ./tests/benchmarks/... -run TestNative
        continue-on-error: true
      
      - name: Test Fallback (Go only)
        run: |
          echo "Running tests WITHOUT native libraries (Go fallback)..."
          go test -v ./tests/...
        continue-on-error: true
      
      - name: Run Benchmarks
        run: |
          echo "Running performance benchmarks..."
          echo "=== Go Implementation ==="
          go test -bench=. ./tests/benchmarks/ -benchmem || true
          echo ""
          echo "=== Native Implementation ==="
          CGO_ENABLED=1 go test -tags native_libs -bench=. ./tests/benchmarks/ -benchmem || true
      
      - name: Lint
        run: |
          echo "Running linters..."
          make lint || echo "Linting completed with warnings"

  build-release:
    name: Build Release Libraries
    runs-on: self-hosted
    needs: test-native
    timeout-minutes: 20
    
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 1
      
      - name: Setup Go (fast)
        run: |
          REQUIRED_GO="1.23.4"
          if command -v go &> /dev/null && go version | grep -q "go${REQUIRED_GO}"; then
            echo "Go ${REQUIRED_GO} already installed - skipping download"
          else
            echo "Installing Go ${REQUIRED_GO}..."
            if [[ "$OSTYPE" == "linux-gnu"* ]]; then
              curl -sL "https://go.dev/dl/go${REQUIRED_GO}.linux-amd64.tar.gz" | sudo tar -C /usr/local -xzf -
            elif [[ "$OSTYPE" == "darwin"* ]]; then
              curl -sL "https://go.dev/dl/go${REQUIRED_GO}.darwin-amd64.tar.gz" | sudo tar -C /usr/local -xzf -
            fi
            export PATH="/usr/local/go/bin:$PATH"
            echo "/usr/local/go/bin" >> $GITHUB_PATH
            echo "Go ${REQUIRED_GO} installed"
          fi
          go version
      
      - name: Build Release Libraries
        run: |
          echo "Building optimized release libraries..."
          make native-release 2>&1
          echo "Release libraries built"
      
      - name: List Build Artifacts
        run: |
          echo "Built libraries:"
          ls -lh native/build/lib* 2>/dev/null || echo "No libraries found in native/build/"
      
      - name: Upload Artifacts
        uses: actions/upload-artifact@v4
        with:
          name: native-libs-${{ runner.os }}-${{ runner.arch }}
          path: |
            native/build/lib*.so
            native/build/lib*.dylib
        continue-on-error: true