cmake_minimum_required(VERSION 3.25)

set(CMAKE_TOOLCHAIN_FILE "${CMAKE_CURRENT_LIST_DIR}/cmake/toolchain.cmake")

project(
	psbw
	LANGUAGES    C CXX ASM
	VERSION      1.0.0
)

find_package(Python3 REQUIRED COMPONENTS Interpreter)

set(GAME_NAME game)

file(GLOB audio_files "${PROJECT_SOURCE_DIR}/assets/music/*.mp3")

set(audio_tracks "")
foreach(audio_file IN LISTS audio_files)
    get_filename_component(audio_filename ${audio_file} NAME)
    set(audio_tracks "${audio_tracks}\n<track type=\"audio\" source=\"${audio_file}\" />")
endforeach()

configure_file(
	"${PROJECT_SOURCE_DIR}/iso.xml"
	"${PROJECT_BINARY_DIR}/iso.xml"
)

configure_file(
    "${PROJECT_SOURCE_DIR}/system.cnf"
    "${PROJECT_BINARY_DIR}/system.cnf"
)

# Create common library which contains things like CPP support and libc
add_library(
	common OBJECT
	lib/libc/crt0.c
	lib/libc/cxxsupport.cpp
	lib/libc/malloc.c
	lib/libc/memset.s
	lib/libc/misc.c
	lib/libc/misc.s
	lib/libc/string.c
	lib/ps1/system.c
	lib/ps1/system.s
	lib/ps1/unhandledexc.c
	lib/vendor/printf.c
)

target_include_directories(
	common PUBLIC
	lib
	inc
	lib/libc
)

# Create the Game library which contains the actual game code
add_library(
	${GAME_NAME} OBJECT
	game/main.cpp
	game/scenes/MainMenu.cpp
	game/scenes/Psxris.cpp
	game/scenes/Test3D.cpp
)

target_include_directories(
	${GAME_NAME} PUBLIC
	lib
	inc
	lib/libc
)

# Create the final executable of the engine and link common and game into it
add_executable(${PROJECT_NAME} 

	#Internal
	src/main.cpp 
	src/interrupts.c
	src/draw.cpp 
	src/vsync.c 
	src/cdrom.c 
	src/cdread.c 
	src/cdmisc.c
	src/filesystem.c  
	src/gte.c
	src/trig.c
	src/sio0.cpp
	 
	#API
	src/psbw/Sio.cpp 
	src/psbw/Scene.cpp
	src/psbw/GameObject.cpp 
	src/psbw/Sprite.cpp 
	src/psbw/Mesh.cpp
	src/psbw/Text.cpp
	src/psbw/Manager.cpp 
	src/psbw/Controller.cpp 
	src/psbw/Sound.cpp 
	src/psbw/Fudgebundle.cpp
	src/psbw/Font.cpp
)
target_link_libraries(${PROJECT_NAME} PRIVATE ${GAME_NAME} common)
target_include_directories(${PROJECT_NAME} PUBLIC inc)

# The final executable requires conversion to be ran on the PSX
add_custom_command(
	TARGET     ${PROJECT_NAME} POST_BUILD
	BYPRODUCTS ${GAME_NAME}.psexe
	COMMAND
		"${Python3_EXECUTABLE}" "${PROJECT_SOURCE_DIR}/tools/convertExecutable.py"
		"$<TARGET_FILE:${PROJECT_NAME}>" ${GAME_NAME}.psexe
	VERBATIM
)



function(addBinaryFile target name path)
	set(_file "${PROJECT_BINARY_DIR}/${target}_${name}.s")
	cmake_path(ABSOLUTE_PATH path OUTPUT_VARIABLE _path)

	file(
		CONFIGURE
		OUTPUT  "${_file}"
		CONTENT [[
.section .data.${name}, "aw"
.balign 8

.global ${name}
.type ${name}, @object
.size ${name}, (${name}_end - ${name})

${name}:
	.incbin "${_path}"
${name}_end:
		]]
		ESCAPE_QUOTES
		NEWLINE_STYLE LF
	)

	target_sources(${target} PRIVATE "${_file}")
	set_source_files_properties("${_file}" PROPERTIES OBJECT_DEPENDS "${_path}")
endfunction()

function(convertImage input bpp)
	add_custom_command(
		OUTPUT  ${ARGN}
		DEPENDS "${PROJECT_SOURCE_DIR}/${input}"
		COMMAND
			"${Python3_EXECUTABLE}" "${PROJECT_SOURCE_DIR}/tools/convertImage.py"
			-b ${bpp} "${PROJECT_SOURCE_DIR}/${input}" ${ARGN}
		VERBATIM
	)
endfunction()

function(psn00bsdk_add_cd_image name image_name config_file)
	if (CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
	set(MKPSXISO mkpsxiso.exe)
	ELSE()
	set(MKPSXISO ${PROJECT_BINARY_DIR}/tree/bin/mkpsxiso)
	ENDIF()
	
	cmake_path(HASH config_file _hash)

	add_custom_command(
		OUTPUT ${image_name}.bin ${image_name}.cue
		COMMAND
			${MKPSXISO} -y
			-o ${image_name}.bin -c ${image_name}.cue ${PROJECT_BINARY_DIR}/iso.xml
		COMMENT "Building CD image ${image_name}"
		VERBATIM
		${ARGN}
	)
	add_custom_target(
		${name} ALL
		DEPENDS
			${CMAKE_CURRENT_BINARY_DIR}/${image_name}.bin
			${CMAKE_CURRENT_BINARY_DIR}/${image_name}.cue
	)
endfunction()

if (NOT CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
	include(ExternalProject)
    ExternalProject_Add(
        mkpsxiso
        PREFIX subprojects
        SOURCE_DIR ${PROJECT_SOURCE_DIR}/tools/mkpsxiso
        INSTALL_DIR tree
        CMAKE_CACHE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${PROJECT_BINARY_DIR}/tree
    )
ENDIF()

if (CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
    psn00bsdk_add_cd_image(
        iso      # Target name
        ${GAME_NAME} # Output file name (= template.bin + template.cue)
        iso.xml  # Path to config file
        DEPENDS psbw system.cnf
    )
ELSE()
    psn00bsdk_add_cd_image(
        iso      # Target name
        ${GAME_NAME} # Output file name (= template.bin + template.cue)
        iso.xml  # Path to config file
        DEPENDS psbw system.cnf mkpsxiso
    )
ENDIF()

include(${PROJECT_SOURCE_DIR}/cmake/defines.cmake)
read_yaml_and_set_defines(GameSettings.yaml)

convertImage(font.png 4 font.dat fontPalette.dat)

addBinaryFile(${PROJECT_NAME} debugFont "${PROJECT_BINARY_DIR}/font.dat")
addBinaryFile(${PROJECT_NAME} debugFontPalette "${PROJECT_BINARY_DIR}/font.dat")