cmake_minimum_required(VERSION 3.18)   # find_program(... REQUIRED)

set(VMIE_VERSION "0.1.4" CACHE STRING "Library version (MAJOR.MINOR.PATCH); CI passes the tag")
project(vmi-engine VERSION ${VMIE_VERSION} LANGUAGES C)

set(CMAKE_C_STANDARD 17)               # generation B uses no C23 feature
set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_C_EXTENSIONS ON)             # deliberate: strnlen (POSIX) + void* arithmetic (GNU)
set(CMAKE_POSITION_INDEPENDENT_CODE ON) # -fPIC on all objects: static lib stays linkable into a shared object

include(GNUInstallDirs)

option(VMIE_LTO "Enable LTO" OFF)      # build-only; shipped default is -O2, no LTO

# ---- host: VMI core objects (single owner of the source list) -----------
add_library(vmie_obj OBJECT
        src/core/gpa.c
        src/engine/gva.c
        src/engine/sigphys.c
        src/engine/win32/host.c
        src/engine/win32/pe.c
        src/engine/win32/proc.c
        src/engine/win32/profile.c
        src/engine/win32/text.c
        src/handlers/scan.c
        src/handlers/sigscan.c
        src/handlers/sigset.c
        src/handlers/codescan.c
        src/handlers/codeanalysis.c
        src/handlers/siggen.c
        src/handlers/x86dec.c
        src/handlers/pmap.c
        src/handlers/snapdiff.c)
target_include_directories(vmie_obj
        PUBLIC  ${CMAKE_CURRENT_SOURCE_DIR}/include              # public API: include/*.h
        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src/core/include     # private: core.h
                ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/include   # private: engine-arch.h, pe.h
                ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32)    # private: engine-win32.h, contract.h
target_compile_options(vmie_obj PRIVATE -O2 -Wall -Wextra)
if(VMIE_LTO)
    target_compile_options(vmie_obj PRIVATE -flto)
    target_link_options(vmie_obj PRIVATE -flto)
endif()

# ---- host: static library (in-tree consumers: CLIs + test) --------------
# $<TARGET_OBJECTS:> carries object files only, not usage requirements:
# re-declare the PUBLIC include scope so vmie_cli/vmie_scan still see include/.
add_library(vmie STATIC $<TARGET_OBJECTS:vmie_obj>)
target_include_directories(vmie PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)

# ---- host: shared library (external delivery: libvmie.so.*) -------------
add_library(vmie_shared SHARED $<TARGET_OBJECTS:vmie_obj>)
target_include_directories(vmie_shared PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
set_target_properties(vmie_shared PROPERTIES
        OUTPUT_NAME vmie
        SOVERSION   ${PROJECT_VERSION_MAJOR}
        VERSION     ${PROJECT_VERSION})
if(VMIE_LTO)
    target_link_options(vmie_shared PRIVATE -flto)
endif()

# ---- host: CLI demonstrator over the library ----------------------------
add_executable(vmie_cli src/cli.c)
target_link_libraries(vmie_cli PRIVATE vmie)   # public include/ comes via vmie (PUBLIC)
target_compile_options(vmie_cli PRIVATE -Wall -Wextra)

# ---- host: dump-scan demonstrator (OS-agnostic, no win32) ----------------
add_executable(vmie_scan src/scan_cli.c)
target_link_libraries(vmie_scan PRIVATE vmie)
target_compile_options(vmie_scan PRIVATE -Wall -Wextra)

# ---- guest: cross-compile to Windows x86-64 via mingw-w64 ---------------
find_program(MINGW_CC NAMES x86_64-w64-mingw32-gcc REQUIRED)
set(VMIE_STARTUP ${CMAKE_CURRENT_BINARY_DIR}/vmie-startup.exe)
add_custom_command(
        OUTPUT  ${VMIE_STARTUP}
        COMMAND ${MINGW_CC} -O2 -Wall -Wextra -static -s
                -I${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32
                -o ${VMIE_STARTUP} ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32/guest.c
        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32/guest.c
                ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32/contract.h
        COMMENT "Cross-compiling vmie-startup.exe (mingw-w64, x86-64)"
        VERBATIM)
add_custom_target(vmie-startup ALL DEPENDS ${VMIE_STARTUP})

# ---- install: shared library + public headers ---------------------------
# Versioned file + SONAME symlink -> runtime; unversioned linker symlink -> dev.
install(TARGETS vmie_shared
        LIBRARY
          DESTINATION ${CMAKE_INSTALL_LIBDIR}
          COMPONENT runtime
          NAMELINK_COMPONENT dev)
install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/
        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/vmie
        COMPONENT dev
        FILES_MATCHING PATTERN "*.h")

# ---- package: two Debian packages (runtime + dev) -----------------------
set(CPACK_GENERATOR "DEB")
set(CPACK_DEB_COMPONENT_INSTALL ON)
set(CPACK_COMPONENTS_ALL runtime dev)
set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})

# component -> Debian package name (Debian shared-library convention)
set(CPACK_DEBIAN_RUNTIME_PACKAGE_NAME "libvmie${PROJECT_VERSION_MAJOR}")
set(CPACK_DEBIAN_DEV_PACKAGE_NAME     "libvmie-dev")

set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "amd64")
set(VMIE_DEB_MAINTAINER "Gregory Lirent <opensource@lirent.ru>"
    CACHE STRING "Debian package Maintainer field")
set(CPACK_DEBIAN_PACKAGE_MAINTAINER "${VMIE_DEB_MAINTAINER}")
set(CPACK_DEBIAN_PACKAGE_SECTION "libs")
set(CPACK_DEBIAN_PACKAGE_PRIORITY "optional")
set(CPACK_DEBIAN_FILE_NAME "DEB-DEFAULT")

set(CPACK_COMPONENT_RUNTIME_DESCRIPTION
    "VM introspection engine (Windows-guest memory introspection) - shared library")
set(CPACK_COMPONENT_DEV_DESCRIPTION
    "VM introspection engine (Windows-guest memory introspection) - development files")

# dev depends on the exact runtime version; runtime libc dependency via shlibdeps
set(CPACK_DEBIAN_DEV_PACKAGE_DEPENDS "libvmie${PROJECT_VERSION_MAJOR} (= ${PROJECT_VERSION})")
set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)

include(CPack)