cmake_minimum_required(VERSION 3.10)
set(PROJECT_EXE_NAME dropshell-tool)
project(${PROJECT_EXE_NAME} VERSION 1.0.0 LANGUAGES CXX)
cmake_policy(SET CMP0135 NEW)

# Force static linking globally
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static")
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build shared libraries" FORCE)
set(CMAKE_POSITION_INDEPENDENT_CODE OFF)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -static")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static")
set(ZLIB_USE_STATIC_LIBS ON)

# Ensure zlib is built as static only
set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
set(ZLIB_BUILD_SHARED OFF CACHE BOOL "" FORCE)
set(ZLIB_BUILD_STATIC ON CACHE BOOL "" FORCE)
# Disable zlib examples and minigzip
set(ZLIB_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
set(ZLIB_BUILD_MINIGZIP OFF CACHE BOOL "" FORCE)

set(CMAKE_CXX_STANDARD 23)
set(CMAKE_C_STANDARD 23)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# Set default build type to Release if not specified
if(NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build (Debug or Release)" FORCE)
endif()

# Configure build-specific compiler flags
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -DNDEBUG")

# Configure version information
string(TIMESTAMP CURRENT_YEAR "%Y")
string(TIMESTAMP CURRENT_MONTH "%m")
string(TIMESTAMP CURRENT_DAY "%d")
string(TIMESTAMP CURRENT_HOUR "%H")
string(TIMESTAMP CURRENT_MINUTE "%M")
set(PROJECT_VERSION "${CURRENT_YEAR}.${CURRENT_MONTH}${CURRENT_DAY}.${CURRENT_HOUR}${CURRENT_MINUTE}")
string(TIMESTAMP RELEASE_DATE "%Y-%m-%d")

# Configure version.hpp file
configure_file(
    "${CMAKE_CURRENT_SOURCE_DIR}/src/version.hpp.in"
    "${CMAKE_CURRENT_BINARY_DIR}/src/autogen/version.hpp"
    @ONLY
)

# Set CMAKE_MODULE_PATH to include our custom find modules
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

# Auto-detect source files
file(GLOB_RECURSE SOURCES "src/*.cpp")
file(GLOB_RECURSE HEADERS "src/*.hpp")

# Add custom target to run cmake_prebuild.sh at the start of the build process
add_custom_target(run_prebuild_script ALL
    COMMAND ${CMAKE_COMMAND} -E echo "Running cmake_prebuild.sh..."
    COMMAND ${CMAKE_COMMAND} -E env bash ${CMAKE_CURRENT_SOURCE_DIR}/cmake_prebuild.sh
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
)

# Add executable
add_executable(${PROJECT_EXE_NAME} ${SOURCES})
add_dependencies(${PROJECT_EXE_NAME} run_prebuild_script)

# Set include directories
# build dir goes first so that we can use the generated version.hpp
target_include_directories(${PROJECT_EXE_NAME} PRIVATE 
    $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/src/autogen>
    ${CMAKE_CURRENT_SOURCE_DIR}/src
    ${CMAKE_CURRENT_SOURCE_DIR}/src/autogen
)

# Configure libassert
include(FetchContent)
FetchContent_Declare(
  libassert
  GIT_REPOSITORY https://github.com/jeremy-rifkin/libassert.git
  GIT_TAG        v2.1.5
)
FetchContent_MakeAvailable(libassert)

# Add cpptrace
FetchContent_Declare(
  cpptrace
  GIT_REPOSITORY https://github.com/jeremy-rifkin/cpptrace.git
  GIT_TAG        v0.8.3
)
FetchContent_MakeAvailable(cpptrace)

# Add nlohmann/json
FetchContent_Declare(
  nlohmann_json
  GIT_REPOSITORY https://github.com/nlohmann/json.git
  GIT_TAG        v3.12.0
)
FetchContent_MakeAvailable(nlohmann_json)

# Fetch and build zlib from source (static)
FetchContent_Declare(
  zlib
  URL https://zlib.net/zlib-1.3.1.tar.gz
)
FetchContent_MakeAvailable(zlib)

# Link libraries
target_link_libraries(${PROJECT_EXE_NAME} PRIVATE
    libassert::assert
    cpptrace::cpptrace
    nlohmann_json::nlohmann_json
    zlibstatic
)

# Set static linking flags
set_target_properties(${PROJECT_EXE_NAME} PROPERTIES
    LINK_FLAGS "-static"
)

find_package(OpenSSL REQUIRED)
target_compile_definitions(${PROJECT_EXE_NAME} PRIVATE CPPHTTPLIB_OPENSSL_SUPPORT)
target_link_libraries(${PROJECT_EXE_NAME} PRIVATE OpenSSL::SSL OpenSSL::Crypto)

# --- MUSL CROSS-COMPILATION ---
# To ensure all dependencies (including zlib) are built with musl, set your toolchain file or:
# set(CMAKE_C_COMPILER "/path/to/musl-gcc")
# set(CMAKE_CXX_COMPILER "/path/to/musl-g++")
# BEFORE the project() call above.