# Windows-optimized gRPC configuration using vcpkg
# This file provides fast gRPC builds on Windows using pre-compiled packages
#
# Benefits:
# - vcpkg build: ~5 minutes (pre-compiled)
# - FetchContent build: ~45 minutes (compile from source)
#
# To use vcpkg (recommended):
#   vcpkg install grpc:x64-windows
#   cmake -DCMAKE_TOOLCHAIN_FILE=<vcpkg-root>/scripts/buildsystems/vcpkg.cmake ..

cmake_minimum_required(VERSION 3.16)

# Option to use vcpkg for gRPC on Windows
option(YAZE_USE_VCPKG_GRPC "Use vcpkg pre-compiled gRPC packages (Windows only)" ON)

if(WIN32 AND YAZE_USE_VCPKG_GRPC)
  message(STATUS "Attempting to use vcpkg gRPC packages for faster Windows builds...")
  message(STATUS "  Note: This is only for full builds with YAZE_WITH_GRPC=ON")
  
  # Try to find gRPC via vcpkg
  find_package(gRPC CONFIG QUIET)
  find_package(Protobuf CONFIG QUIET)
  
  if(gRPC_FOUND AND Protobuf_FOUND)
    message(STATUS "✓ Using vcpkg gRPC packages (fast build path)")

    # Prevent Windows macro pollution in protobuf-generated headers
    add_compile_definitions(
        WIN32_LEAN_AND_MEAN  # Exclude rarely-used Windows headers
        NOMINMAX             # Don't define min/max macros
        NOGDI                # Exclude GDI (prevents DWORD and other macro conflicts)
    )

    
    # Verify required targets exist
    if(NOT TARGET grpc++)
      message(WARNING "gRPC found but grpc++ target missing - falling back to FetchContent")
      set(YAZE_GRPC_CONFIGURED FALSE PARENT_SCOPE)
      return()
    endif()
    
    if(NOT TARGET protoc)
      # Create protoc target if it doesn't exist
      get_target_property(PROTOC_LOCATION protobuf::protoc LOCATION)
      if(PROTOC_LOCATION)
        add_executable(protoc IMPORTED)
        set_target_properties(protoc PROPERTIES IMPORTED_LOCATION "${PROTOC_LOCATION}")
      else()
        message(FATAL_ERROR "protoc executable not found in vcpkg gRPC package")
      endif()
    endif()
    
    if(NOT TARGET grpc_cpp_plugin)
      # Find grpc_cpp_plugin
      find_program(GRPC_CPP_PLUGIN grpc_cpp_plugin)
      if(GRPC_CPP_PLUGIN)
        add_executable(grpc_cpp_plugin IMPORTED)
        set_target_properties(grpc_cpp_plugin PROPERTIES IMPORTED_LOCATION "${GRPC_CPP_PLUGIN}")
      else()
        message(FATAL_ERROR "grpc_cpp_plugin not found in vcpkg gRPC package")
      endif()
    endif()
    
    # Set variables for compatibility with rest of build system
    set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE $<TARGET_FILE:protoc>)
    set(_gRPC_CPP_PLUGIN $<TARGET_FILE:grpc_cpp_plugin>)
    set(_gRPC_PROTO_GENS_DIR ${CMAKE_BINARY_DIR}/gens)
    file(MAKE_DIRECTORY ${_gRPC_PROTO_GENS_DIR})
    
    # Skip the FetchContent path
    set(YAZE_GRPC_CONFIGURED TRUE PARENT_SCOPE)
    return()
  else()
    message(WARNING "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━")
    message(WARNING "  vcpkg gRPC not found")
    message(WARNING "  For faster builds (5 min vs 45 min), install:")
    message(WARNING "  ")
    message(WARNING "    vcpkg install grpc:x64-windows")
    message(WARNING "  ")
    message(WARNING "  Then configure with:")
    message(WARNING "    cmake -DCMAKE_TOOLCHAIN_FILE=<vcpkg>/scripts/buildsystems/vcpkg.cmake ..")
    message(WARNING "  ")
    message(WARNING "  Falling back to FetchContent (slow but works)")
    message(WARNING "  Using gRPC v1.67.1 (MSVC-compatible)")
    message(WARNING "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━")
  endif()
endif()

# If we reach here, vcpkg wasn't used - fall back to standard grpc.cmake
message(STATUS "Using FetchContent for gRPC (standard path)")
set(YAZE_GRPC_CONFIGURED FALSE PARENT_SCOPE)