import os
import shutil
import subprocess
import time
from multiprocessing import Pool


ARCH_FLAGS = "-m64 -march=x86-64 -mabi=sysv -mno-red-zone -mcmodel=kernel -MMD -MP"
WARN_FLAGS = "-Wall -Wextra -nostdlib "
STANDART_FLAGS = "-std=gnu11"
PROTECT_FLAGS = "-O0 -pipe -ffreestanding -fno-stack-protector -fno-lto -fno-stack-check -fno-PIC -fno-PIE"
CHARSET_FLAGS = "-finput-charset=UTF-8 -fexec-charset=cp1251"
LIBS_FLAGS = "-Ilimine -Iinclude"

def version_build():
    with open("include/version.h", "r") as file:
        lines = file.readlines()

    major = 0
    minor = 0
    build = 0

    with open("include/version.h", "w") as file:
        for line in lines:
            if line.startswith("#define VERSION_BUILD"):
                parts = line.split()
                build = int(parts[2]) + 1
                if build > 999:
                    build = 0
                    minor += 1
                    file.write(f"#define VERSION_MINOR {minor}\n")
                file.write(f"#define VERSION_BUILD {build}\n")
            elif line.startswith("#define VERSION_MAJOR"):
                parts = line.split()
                major = int(parts[2])
                file.write(line)
            elif line.startswith("#define VERSION_MINOR"):
                parts = line.split()
                minor = int(parts[2])
                file.write(line)
            else:
                file.write(line)

    return [major, minor, build]

def sort_strings(strings):
    return sorted(strings, key=lambda x: not x.endswith('.s.o'))

def find_files(directory, extensions):
    file_list = []
    for root, dirs, files in os.walk(directory):
        for file in files:
            if any(file.endswith(extension) for extension in extensions):
                file_list.append(os.path.join(root, file))
    return file_list


def compile(file: str):
    CC = "gcc"
    output_file = file.replace('/', '_')
    obj_file = f"bin/{output_file}.o"
    cmd = f"{CC} {WARN_FLAGS} {PROTECT_FLAGS} {ARCH_FLAGS} {CHARSET_FLAGS} {LIBS_FLAGS} -c {file} -o {obj_file}"
    print(cmd)
    os.system(cmd)
    return obj_file


def compile_all():
    file_list = find_files("kernel/", [".s", ".cpp", ".c"])
    file_list += find_files("kernel/*/*", [".s", ".cpp", ".c"])

    with Pool() as pool:
        results = pool.map(compile, file_list)

    while not all(results):
        print(results)
        time.sleep(1)
    print(results)
    cmd = f"ld -nostdlib -static -m elf_x86_64 -z max-page-size=0x1000 -T configs/linker.ld -o kernel.elf {' '.join(sort_strings(results))}"
    print(cmd)
    os.system(cmd)


def check_limine():
    if not os.path.isdir("limine"):
        subprocess.run(["git", "clone", "https://git.synapseos.ru/Aren/limine.git", "--branch=v5.x-branch-binary", "--depth=1"])
    else:
        os.chdir("limine")
        subprocess.run(["git", "pull"])
        os.chdir("..")
    os.chdir("limine")
    subprocess.run(["make"])
    os.chdir("..")



def check_os():
    import platform
    using_distro = False
    try:
        import distro
        using_distro = True
    except ImportError:
        pass
    if using_distro:
        linux_distro = distro.like()
    else:
        linux_distro = platform.linux_distribution()[0]
    if linux_distro.lower() in ['debian', 'ubuntu']:
        return 1
    return 0

def check_tools():
    required_tools = ["gcc", "g++", "xorriso", "make", "mtools", "curl"]
    missing_tools = []

    for tool in required_tools:
        if shutil.which(tool) is None:
            missing_tools.append(tool)

    if len(missing_tools) > 0:
        if check_os():
            subprocess.run(["sudo", "apt", "install"] + missing_tools)
            return
        subprocess.run(["sudo", "pacman", "-S"] + missing_tools)


def create_hdd(IMAGE_NAME):
    os.system(f"rm -f {IMAGE_NAME}.hdd".format())
    os.system(f"dd if=/dev/zero bs=1M count=0 seek=4 of={IMAGE_NAME}.hdd")
    os.system(f"sgdisk {IMAGE_NAME}.hdd -n 1:2048 -t 1:ef00")
    os.system(f"./limine/limine bios-install {IMAGE_NAME}.hdd")
    os.system(f"mformat -i {IMAGE_NAME}.hdd@@1M")
    os.system(f"mmd -i {IMAGE_NAME}.hdd@@1M ::/mod ::/EFI ::/EFI/BOOT")
    os.system(f"mcopy -i {IMAGE_NAME}.hdd@@1M kernel.elf configs/limine.cfg limine/limine-bios.sys ::/")
    os.system(f"mcopy -i {IMAGE_NAME}.hdd@@1M modules/bin/*.ko ::/mod")
    os.system(f"mcopy -i {IMAGE_NAME}.hdd@@1M limine/BOOTX64.EFI limine/BOOTIA32.EFI ::/EFI/BOOT")
    os.system(f"mcopy -i {IMAGE_NAME}.hdd@@1M boot.jpg boot.tga ::/")
    os.system(f"./limine/limine bios-install {IMAGE_NAME}.hdd")


def create_iso(IMAGE_NAME):
    os.system(f"rm -f {IMAGE_NAME}.iso")
    os.system(f"rm -rf iso_root")
    os.system(f"mkdir -p iso_root")
    os.system(f"cp -v kernel.elf boot.jpg boot.tga configs/limine.cfg limine/limine-bios.sys limine/limine-bios-cd.bin limine/limine-uefi-cd.bin iso_root/")
    os.system(f"mkdir -p iso_root/EFI/BOOT")
    shutil.copytree("modules/bin", "iso_root/mod")
    os.system(f"cp -v limine/BOOTX64.EFI iso_root/EFI/BOOT/")
    os.system(f"cp -v limine/BOOTIA32.EFI iso_root/EFI/BOOT/")
    os.system(f"xorriso -as mkisofs -b limine-bios-cd.bin -no-emul-boot -boot-load-size 4 -boot-info-table --efi-boot limine-uefi-cd.bin -efi-boot-part --efi-boot-image --protective-msdos-label iso_root -o {IMAGE_NAME}.iso")
    os.system(f"./limine/limine bios-install {IMAGE_NAME}.iso")

if __name__ == "__main__":
    os.system("""find . \( -name "*.c" -o -name "*.h" -o -name "*.cpp" -o -name "*.hpp" \) -print0 | xargs -0 clang-format -i -style=file""")
    subprocess.run(["rm", "-rf", "bin"])
    subprocess.run(["mkdir", "-p", "bin"])

    if not os.path.isdir("ovmf"):
        subprocess.run(["mkdir", "-p", "ovmf"])
        os.chdir("ovmf")
        subprocess.run(["curl", "-Lo", "OVMF.fd", "https://retrage.github.io/edk2-nightly/bin/RELEASEX64_OVMF.fd"])
        os.chdir("..")

    if not os.path.isdir("limine"):
        check_limine()
    check_tools()
    major, minor, build = version_build()
    compile_all()
    create_iso("bmosp")
    create_hdd("bmosp")

    print(f"Не забудьте сохранить изменения! Номер сборки: {major}.{minor}.{build}")