name: CI Build Workflow

on:
  workflow_call:
    inputs:
      os:
        required: true
        type: string
      compiler:
        required: true
        type: string
      platform:
        required: true
        type: string
      config:
        required: true
        type: string
      runs-on:
        required: true
        type: string
      warnings-as-errors:
        required: false
        type: boolean
        default: true
      build-llvm:
        required: false
        type: boolean
        default: true
      server-count:
        required: false
        type: number
        default: 8

jobs:
  build:
    runs-on: ${{ fromJSON(inputs.runs-on) }}
    timeout-minutes: 60

    defaults:
      run:
        shell: bash

    steps:
      - uses: actions/checkout@v4
        with:
          submodules: "recursive"
          fetch-depth: "2"

      - name: Setup
        uses: ./.github/actions/common-setup
        with:
          os: ${{ inputs.os }}
          compiler: ${{ inputs.compiler }}
          platform: ${{ inputs.platform }}
          config: ${{ inputs.config }}
          build-llvm: ${{ inputs.build-llvm }}

      # Don't need to check this on every config
      - name: Check Stable Names Table
        if: ${{ inputs.os == 'linux' && inputs.config == 'debug' }}
        run: ./extras/check-ir-stable-names-gh-actions.sh

      - name: Check Version Constants
        id: check-ir-versions
        if: ${{ inputs.os == 'linux' && inputs.config == 'debug' && github.event_name == 'pull_request' }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GITHUB_EVENT_NAME: ${{ github.event_name }}
          GITHUB_EVENT_PULL_REQUEST_NUMBER: ${{ github.event.pull_request.number }}
          GITHUB_BASE_REF: ${{ github.base_ref }}
        run: ./extras/check-inst-version-changes.sh

      - name: Upload IR version check results
        if: ${{ steps.check-ir-versions.outputs.artifact_created == 'true' }}
        uses: actions/upload-artifact@v4
        with:
          name: ir-version-check-results
          path: ir-version-check-artifact/
          retention-days: 1

      - name: Build Slang
        run: |
          echo "cmake version: $(cmake --version)"

          # Show ccache status if available
          if command -v ccache &> /dev/null; then
            echo "🔧 ccache configuration:"
            ccache --show-config | head -20 || true
            echo "📊 ccache statistics (pre-build):"
            ccache --show-stats || true
          else
            echo "ℹ️  ccache not available"
          fi

          if [[ "${{ inputs.platform }}" == "wasm" ]]; then
            git clone https://github.com/emscripten-core/emsdk.git
            pushd emsdk
              ./emsdk install latest
              ./emsdk activate latest
              source ./emsdk_env.sh
            popd
            cmake --workflow --preset generators --fresh
            mkdir generators
            cmake --install build --config Release --component generators --prefix generators
            emcmake cmake -DSLANG_GENERATORS_PATH=generators/bin --preset emscripten -DSLANG_SLANG_LLVM_FLAVOR=DISABLE
            cmake --build --preset emscripten --config "$cmake_config" --target slang-wasm
            mkdir "build.em/$cmake_config/bin/smoke"
            cp tests/wasm/smoke/* "build.em/$cmake_config/bin/smoke/"
            cd "build.em/$cmake_config/bin"
            [ -f "slang-wasm.wasm" ]
            [ -f "slang-wasm.js" ]
            node smoke/smoke-test.js smoke/rand_float.slang computeMain
          else
            # Prepare ccache launcher arguments if ccache is available
            cmake_launcher_defines=()
            if [[ -n "${ccache_symlinks_path:-}" ]]; then
              echo "🔧 Using ccache with launcher: ${ccache_symlinks_path}"
              echo "🔧 CCACHE_DIR is set to: ${CCACHE_DIR:-'not set'}"
              cmake_launcher_defines+=("-DCMAKE_C_COMPILER_LAUNCHER=${ccache_symlinks_path}")
              cmake_launcher_defines+=("-DCMAKE_CXX_COMPILER_LAUNCHER=${ccache_symlinks_path}")
            else
              echo "ℹ️  ccache_symlinks_path not set - building without ccache"
            fi

            if [[ "${{ inputs.os }}" =~ "windows" && "${{ inputs.config }}" == "debug" ]]; then
              # Doing a debug build will try to link against a release built llvm, this
              # is a problem on Windows, so make slang-llvm in release build and use
              # that as though it's a fetched binary via these presets.
              cmake --workflow --preset slang-llvm
              
              # Configure, pointing to our just-generated slang-llvm archive
              cmake --preset default --fresh \
                -DSLANG_SLANG_LLVM_FLAVOR=FETCH_BINARY \
                "-DSLANG_SLANG_LLVM_BINARY_URL=$(pwd)/build/dist-release/slang-llvm.zip" \
                "-DCMAKE_COMPILE_WARNING_AS_ERROR=${{ inputs.warnings-as-errors }}" \
                "${cmake_launcher_defines[@]}"
              cmake --workflow --preset "${{ inputs.config }}"
            elif [[ "${{ inputs.build-llvm }}" = "false" ]]; then
              # linux aarch64 cannot build llvm.
              cmake --preset default --fresh \
                -DSLANG_SLANG_LLVM_FLAVOR=DISABLE \
                -DCMAKE_COMPILE_WARNING_AS_ERROR=${{ inputs.warnings-as-errors }} \
                "${cmake_launcher_defines[@]}"
              cmake --workflow --preset "${{ inputs.config }}"
            else
              # Otherwise, use the "system" llvm we have just build or got from the
              # cache in the setup phase
              cmake --preset default --fresh \
                -DSLANG_SLANG_LLVM_FLAVOR=USE_SYSTEM_LLVM \
                -DCMAKE_COMPILE_WARNING_AS_ERROR=${{ inputs.warnings-as-errors }} \
                "${cmake_launcher_defines[@]}"
              cmake --workflow --preset "${{ inputs.config }}"
            fi
          fi

          # Show ccache statistics after build
          if command -v ccache &> /dev/null; then
            echo "📊 ccache statistics (post-build):"
            ccache --show-stats || true
          fi

      - name: Check documented compiler versions
        run: bash extras/verify-documented-compiler-version.sh

      - name: Prepare artifacts for upload
        run: |
          # Create a staging directory for artifacts with config-specific subdirectory
          mkdir -p "artifacts-staging/${cmake_config}"

          # Copy artifacts from the specific configuration directory
          if [ -d "build/${cmake_config}" ]; then
            echo "Copying artifacts from build/${cmake_config} to github_artifact/${cmake_config}..."
            
            # Copy bin directory excluding debug files
            if [ -d "build/${cmake_config}/bin" ]; then
              mkdir -p "artifacts-staging/${cmake_config}/bin"
              find "build/${cmake_config}/bin" -type f ! -name "*.pdb" ! -name "*.ilk" ! -name "*.dwarf" ! -name "*.debug" ! -name "*.dSYM" -exec cp {} "artifacts-staging/${cmake_config}/bin/" \; || echo "Failed to copy bin directory"

              cp -r "build/${cmake_config}/bin/D3D12" "artifacts-staging/${cmake_config}/bin/" || echo "Failed to copy bin/D3D12 directory"
            fi
            
            # Copy everything from lib directory
            if [ -d "build/${cmake_config}/lib" ]; then
              cp -r "build/${cmake_config}/lib" "artifacts-staging/${cmake_config}/" || echo "Failed to copy lib directory"
            fi
            
            # Copy share directory if it exists
            if [ -d "build/${cmake_config}/share" ]; then
              cp -r "build/${cmake_config}/share" "artifacts-staging/${cmake_config}/" || echo "Failed to copy share directory"
            fi
            
            # Copy include directory if it exists
            if [ -d "build/${cmake_config}/include" ]; then
              cp -r "build/${cmake_config}/include" "artifacts-staging/${cmake_config}/" || echo "Failed to copy include directory"
            fi
            
            # Copy examples directory if it exists (contains shader files for examples)
            if [ -d "build/examples" ]; then
              cp -r "build/examples" "artifacts-staging/" || echo "Failed to copy examples directory"
            fi
            
          echo "Artifacts staging directory contents (recursive):"
          ls -laR artifacts-staging/
          else
            echo "Configuration directory build/${cmake_config} not found!"
            echo "Available build directories:"
            ls -la build/ || echo "No build directory found"
            exit 1
          fi

      - uses: actions/upload-artifact@v4
        with:
          name: slang-build-${{ inputs.os }}-${{ inputs.platform }}-${{ inputs.compiler }}-${{ inputs.config }}
          path: |
            build/dist-${{inputs.config}}/**/ZIP/slang/*
            build.em/Release

      - uses: actions/upload-artifact@v4
        with:
          name: slang-tests-${{ inputs.os }}-${{ inputs.platform }}-${{ inputs.compiler }}-${{ inputs.config }}
          path: artifacts-staging/
          retention-days: 1