# Copyright 2025 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

cmake_minimum_required(VERSION 3.21)

project(svs_shared_library_example
    LANGUAGES CXX
)

# Try to find SVS from system/conda/pip installation first
find_package(svs QUIET)

if(NOT svs_FOUND)
    # If sourcing from pip/conda, the following steps are not necessary, simplifying workflow
    # If not found, download tarball from GitHub release and follow steps to fetch and find
    set(SVS_URL "https://github.com/intel/ScalableVectorSearch/releases/download/v0.1.0/svs-shared-library-0.1.0.tar.gz" CACHE STRINGS "URL to download SVS shared library tarball if not found in system")

    message(STATUS "SVS not found in system, downloading from: ${SVS_URL}")

    include(FetchContent)
    FetchContent_Declare(
        svs
        URL "${SVS_URL}"
    )
    FetchContent_MakeAvailable(svs)

    list(APPEND CMAKE_PREFIX_PATH "${svs_SOURCE_DIR}")
    find_package(svs REQUIRED)
else()
    message(STATUS "Found SVS: ${svs_DIR}")
endif()

set(SVS_CXX_STANDARD 20)
set(CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -O3 -DNDEBUG -std=gnu++20 -march=native -mtune=native -Werror -Wall -Wextra -Wpedantic" )

# Configure path to the datasets used in these examples
set(DATA_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/../../../data/test_dataset")

function(create_example_executable exe file)
    add_executable(${exe} ${file})
    target_compile_definitions(${exe} PRIVATE SVS_DATA_DIR="${DATA_DIRECTORY}")
    target_link_libraries(${exe} PUBLIC
        svs::svs_shared_library
        svs::svs
    )
endfunction()

create_example_executable(shared shared.cpp)
create_example_executable(example_vamana_with_compression_lvq example_vamana_with_compression_lvq.cpp)
create_example_executable(example_vamana_with_compression example_vamana_with_compression.cpp)
create_example_executable(example_vamana_with_compression_dynamic example_vamana_with_compression_dynamic.cpp)

# IVF examples with LVQ and LeanVec compression (only when IVF is enabled)
option(SVS_ENABLE_IVF_EXAMPLES "Build IVF examples" OFF)
if(SVS_ENABLE_IVF_EXAMPLES)
    # Find MKL for IVF examples (required for cblas_sgemm)
    set(MKL_THREADING sequential)
    find_package(MKL REQUIRED)

    function(create_ivf_example_executable exe file)
        add_executable(${exe} ${file})
        target_compile_definitions(${exe} PRIVATE SVS_DATA_DIR="${DATA_DIRECTORY}")
        target_link_libraries(${exe} PUBLIC
            svs::svs_shared_library
            svs::svs
            MKL::MKL
        )
    endfunction()

    create_ivf_example_executable(example_ivf_with_compression_lvq example_ivf_with_compression_lvq.cpp)
    create_ivf_example_executable(example_ivf_with_compression_leanvec example_ivf_with_compression_leanvec.cpp)
    create_ivf_example_executable(example_ivf_with_compression_dynamic example_ivf_with_compression_dynamic.cpp)
endif()