# core/ produces TWO targets (ADR 0009):
#   veloxcore  — the download engine. No JSON, no SQL, no Qt, no RPC. Ever (CLAUDE.md §3).
#   veloxproto — the generated wire types, which ARE JSON. NOT linked by veloxcore.
# The `no JSON in core/` rule constrains core/src/ and core/include/; core/generated/ is
# the sanctioned exception. Wired in by PKG via add_subdirectory(core) in the root file.

find_package(Threads REQUIRED)
find_package(CURL 8.0 REQUIRED)

add_library(veloxcore STATIC
    src/util/error.cpp
    src/util/log.cpp
    src/util/thread_pool.cpp
    src/net/curl_error.cpp
    src/net/http_client.cpp
    src/net/text_codec.cpp
    src/net/content_disposition.cpp
    src/net/url.cpp
    src/net/probe.cpp
    src/io/sparse_file.cpp
    src/io/write_buffer.cpp
    src/meta/veloxpart.cpp
)
add_library(velox::core ALIAS veloxcore)

target_include_directories(veloxcore
    PUBLIC  ${CMAKE_CURRENT_SOURCE_DIR}/include
    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src   # net/*.cpp -> "net/curl_error.hpp"
)

target_compile_features(veloxcore PUBLIC cxx_std_23)

# Warnings are set at target scope, not via CMAKE_CXX_FLAGS: the dev/tsan presets
# overwrite that cache variable wholesale (see core/docs/pkg-requests-m1.md P4).
target_compile_options(veloxcore PRIVATE
    -Wall -Wextra -Wpedantic -Werror
)

target_link_libraries(veloxcore PUBLIC Threads::Threads CURL::libcurl)

# Later stages add: find_package(OpenSSL) for meta/ (streaming SHA-256 + resume CRC).

# --- libveloxproto — generated wire code (ADR 0009) --------------------------------------
# Its own target so libveloxcore stays JSON-free. Consumed by veloxd, the CLI, the GUI and
# the conformance runner. The root CMakeLists only find_package(nlohmann_json)'s when
# daemon/ has landed, so find it here too — this must build even if core is the only lane.
if(NOT TARGET nlohmann_json::nlohmann_json)
    find_package(nlohmann_json 3.11 REQUIRED)
endif()

add_library(veloxproto STATIC generated/velox_proto.cpp)
add_library(velox::proto ALIAS veloxproto)

target_include_directories(veloxproto PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/generated)
target_compile_features(veloxproto PUBLIC cxx_std_23)
target_link_libraries(veloxproto PUBLIC nlohmann_json::nlohmann_json)

# Generated code is committed and never hand-edited (CLAUDE.md §2); do not fail the build
# on a codegen quirk that trips -Werror. Warnings stay on for visibility.
target_compile_options(veloxproto PRIVATE -Wall -Wextra -Wno-error)

# A build-time tripwire for the split ADR 0009 exists to protect: veloxcore must never end
# up linking veloxproto.
get_target_property(_core_links veloxcore LINK_LIBRARIES)
if(_core_links AND "veloxproto" IN_LIST _core_links)
    message(FATAL_ERROR "veloxcore links veloxproto — ADR 0009 violation (engine sees JSON).")
endif()

if(VELOX_BUILD_TESTS)
    add_subdirectory(tests)
endif()

# Fuzz targets live in ${CMAKE_SOURCE_DIR}/tools/fuzz (lane CORE) and are wired in by the
# top-level CMakeLists.txt, which add_subdirectory()s every tools/* with a CMakeLists.
# tools/fuzz/CMakeLists.txt self-guards on VELOX_BUILD_FUZZ + a Clang compiler.
# Present: Content-Disposition, URL (stage 3). Coming: .veloxpart.meta (stage 5).