# Require a modern version of CMake 
cmake_minimum_required(VERSION 3.15)

# Define the workspace/project
project(SakuraVNE LANGUAGES CXX)

# Enforce C++20 globally
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF) # Disables compiler-specific extensions (like gnu++20)

# ------------------------------------------------------------------------------
# Output Directory Configuration (Mirrors your Premake setup)
# ------------------------------------------------------------------------------
# This mimics: build/bin/{Config}-{System}-{Architecture}
set(OUTPUT_DIR_SUFFIX "$<CONFIG>-${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_PROCESSOR}")

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/${OUTPUT_DIR_SUFFIX}")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/${OUTPUT_DIR_SUFFIX}")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/${OUTPUT_DIR_SUFFIX}")

# ------------------------------------------------------------------------------
# Dependencies
# ------------------------------------------------------------------------------
# 1. SDL3
set(SDL_TESTS OFF CACHE BOOL "Disable SDL3 tests" FORCE)
set(SDL_EXAMPLES OFF CACHE BOOL "Disable SDL3 examples" FORCE)
add_subdirectory(libs/sdl3)

# 2. spdlog
set(SPDLOG_BUILD_COMPILED ON CACHE BOOL "Build spdlog as a compiled library" FORCE)
set(SPDLOG_BUILD_EXAMPLE OFF CACHE BOOL "Disable spdlog examples" FORCE)
set(SPDLOG_BUILD_TESTS OFF CACHE BOOL "Disable spdlog tests" FORCE)
add_subdirectory(libs/spdlog)

# 3. ImGui & ImGui Node Editor
add_subdirectory(libs/imgui)
add_subdirectory(libs/imgui-node-editor)

# 4. Catch2
add_subdirectory(libs/catch2)


# ------------------------------------------------------------------------------
# Source Gathering
# ------------------------------------------------------------------------------
# Gather all .cpp and .h files in the src folder
file(GLOB_RECURSE SAKURA_SRCS "SakuraVNE/src/*.cpp" "SakuraVNE/src/*.h")

# CRITICAL: Remove main.cpp from the list so Catch2 can provide its own main()
list(REMOVE_ITEM SAKURA_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/SakuraVNE/src/main.cpp")


# ------------------------------------------------------------------------------
# SakuraVNE Executable Target
# ------------------------------------------------------------------------------
# Create the ConsoleApp executable (explicitly adding main.cpp back in here)
add_executable(SakuraVNE "SakuraVNE/src/main.cpp" ${SAKURA_SRCS})

# Tell the compiler where the headers are
target_include_directories(SakuraVNE PRIVATE
    "SakuraVNE/src"
    "libs/spdlog/include"
    "libs/imgui"
    "libs/imgui/misc"
    "libs/imgui/backends"
    "libs/imgui-node-editor"
    "libs/sdl3/include"
)

# Link the libraries. CMake handles all the libdirs automatically! [cite: 5]
target_link_libraries(SakuraVNE PRIVATE
    ImGui               
    ImGuiNodeEditor     
    SDL3::SDL3          
    spdlog::spdlog      
)


# ------------------------------------------------------------------------------
# Tests Executable Target
# ------------------------------------------------------------------------------
# These tests can use the Catch2-provided main, plus ALL your engine source files
add_executable(tests "SakuraVNE/test/test.cpp" ${SAKURA_SRCS})

# The tests need the exact same include directories so your engine #includes work
target_include_directories(tests PRIVATE
    "SakuraVNE/src"
    "libs/spdlog/include"
    "libs/imgui"
    "libs/imgui/misc"
    "libs/imgui/backends"
    "libs/imgui-node-editor"
    "libs/sdl3/include"
)

# Link Catch2 AND the exact same dependencies your game uses
target_link_libraries(tests PRIVATE 
    Catch2::Catch2WithMain
    ImGui               
    ImGuiNodeEditor     
    SDL3::SDL3          
    spdlog::spdlog 
)


# ------------------------------------------------------------------------------
# Platform & Configuration Filters
# ------------------------------------------------------------------------------
if(WIN32)
    # Apply to Game
    target_compile_definitions(SakuraVNE PRIVATE PLATFORM_WINDOWS)
    target_link_options(SakuraVNE PRIVATE "/NODEFAULTLIB:MSVCRT")
    
    # Apply to Tests
    target_compile_definitions(tests PRIVATE PLATFORM_WINDOWS)
    target_link_options(tests PRIVATE "/NODEFAULTLIB:MSVCRT")

elseif(UNIX AND NOT APPLE)
    # Apply to Game
    target_compile_definitions(SakuraVNE PRIVATE PLATFORM_LINUX)
    target_link_libraries(SakuraVNE PRIVATE dl pthread)
    
    # Apply to Tests
    target_compile_definitions(tests PRIVATE PLATFORM_LINUX)
    target_link_libraries(tests PRIVATE dl pthread)
endif()

# Debug vs Release definitions for Game
target_compile_definitions(SakuraVNE PRIVATE
    $<$<CONFIG:Debug>:DEBUG>
    $<$<CONFIG:Release>:RELEASE>
)

# Debug vs Release definitions for Tests
target_compile_definitions(tests PRIVATE
    $<$<CONFIG:Debug>:DEBUG>
    $<$<CONFIG:Release>:RELEASE>
)