cmake_minimum_required(VERSION 3.10)
project(TerraVisor VERSION 0.0.3)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

configure_file(
  "${PROJECT_SOURCE_DIR}/include/config.h.in"
  "${PROJECT_BINARY_DIR}/config.h"  
)
include_directories("${PROJECT_BINARY_DIR}")

# Find packages using vcpkg
find_package(GLEW CONFIG REQUIRED)
find_package(glfw3 CONFIG REQUIRED)
find_package(glm CONFIG REQUIRED)
find_package(assimp CONFIG REQUIRED)

# Set Debug and Release directories
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG "${CMAKE_BINARY_DIR}")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE "${CMAKE_BINARY_DIR}")

# Add source files
file(GLOB_RECURSE SOURCES "${CMAKE_SOURCE_DIR}/source/*.cpp")
file(GLOB_RECURSE HEADERS "${CMAKE_SOURCE_DIR}/include/*.h")
file(GLOB SHADERS "${CMAKE_SOURCE_DIR}/shaders/*.glsl")
file(GLOB IMGUI_SOURCES
  "${CMAKE_SOURCE_DIR}/imgui/*.cpp"
  "${CMAKE_SOURCE_DIR}/imgui/backends/imgui_impl_glfw.cpp"
  "${CMAKE_SOURCE_DIR}/imgui/backends/imgui_impl_opengl3.cpp"
)
file(GLOB FREEIMAGE_HEADER "${CMAKE_SOURCE_DIR}/dependencies/FreeImage/include/*.h")

# Add the executable
add_executable(TerraVisor ${SOURCES} ${HEADERS} ${IMGUI_SOURCES} ${FREEIMAGE_HEADER})

# Include directories (handled by find_package now)
include_directories(
  ${CMAKE_SOURCE_DIR}/include
  ${CMAKE_SOURCE_DIR}/imgui
  ${CMAKE_SOURCE_DIR}/imgui/backends
  ${CMAKE_SOURCE_DIR}/dependencies/FreeImage/include
)

link_directories(${CMAKE_SOURCE_DIR}/dependencies/FreeImage/lib)

# Link libraries using vcpkg
if (UNIX)
  target_link_libraries(TerraVisor PRIVATE 
    GLEW::GLEW 
    glfw 
    glm::glm 
    assimp::assimp
    ${CMAKE_SOURCE_DIR}/dependencies/FreeImage/lib/UNIX/libfreeimage.a
    /vcpkg/installed/x64-linux/debug/lib/libtiffd.a
    /vcpkg/installed/x64-linux/debug/lib/libjpeg.a
    /vcpkg/installed/x64-linux/debug/lib/libz.a
    /vcpkg/installed/x64-linux/debug/lib/liblzma.a
    /usr/lib/x86_64-linux-gnu/libGL.so
    /usr/lib/x86_64-linux-gnu/libGLU.so
    /usr/lib/x86_64-linux-gnu/libX11.so
    /usr/lib/x86_64-linux-gnu/libXext.so
    -lm
    -ldl
    -lrt
  )
else()
  target_link_libraries(TerraVisor PRIVATE GLEW::GLEW glfw glm::glm assimp::assimp ${CMAKE_SOURCE_DIR}/dependencies/FreeImage/lib/WIN32/FreeImage.lib)
endif()

# Custom targets
add_custom_target(copy_shaders ALL
  COMMAND ${CMAKE_COMMAND} -E copy_directory
  ${CMAKE_SOURCE_DIR}/shaders ${CMAKE_BINARY_DIR}/shaders
)
add_custom_target(copy_hgt ALL
  COMMAND ${CMAKE_COMMAND} -E copy_directory
  ${CMAKE_SOURCE_DIR}/hgt ${CMAKE_BINARY_DIR}/hgt
)
# Set paths for FreeImage DLL
set(FREEIMAGE_DLL_PATH "${CMAKE_SOURCE_DIR}/dependencies/FreeImage/bin/FreeImage.dll")

# Add custom command to copy FreeImage.dll to the output directory for both Debug and Release
add_custom_command(TARGET TerraVisor POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
    ${FREEIMAGE_DLL_PATH} 
    $<TARGET_FILE_DIR:TerraVisor>
)

# Set subsystem based on build type
if (WIN32)
    if (CMAKE_BUILD_TYPE STREQUAL "Release")
        set_target_properties(TerraVisor PROPERTIES LINK_FLAGS "-Wl,--subsystem,windows")
    else()
        set_target_properties(TerraVisor PROPERTIES LINK_FLAGS "-Wl,--subsystem,console")
    endif()
endif()

# Ensure shaders are copied before building the executable
add_dependencies(TerraVisor copy_shaders copy_hgt)