import os
import sys
import json
import platform
import uuid
import functools
import subprocess

# NOTE: The multiprocessing module is not compatible with SCons due to conflict on cPickle

JSON_SERIALIZABLE_TYPES = (bool, int, float, str)


def run_in_subprocess(builder_function):
    @functools.wraps(builder_function)
    def wrapper(target, source, env):
        # Convert SCons Node instances to absolute paths
        target = [node.srcnode().abspath for node in target]
        source = [node.srcnode().abspath for node in source]

        # Short circuit on non-Windows platforms, no need to run in subprocess
        if sys.platform not in ("win32", "cygwin"):
            return builder_function(target, source, env)

        # Identify module
        module_name = builder_function.__module__
        function_name = builder_function.__name__
        module_path = sys.modules[module_name].__file__
        if module_path.endswith(".pyc") or module_path.endswith(".pyo"):
            module_path = module_path[:-1]

        # Subprocess environment
        subprocess_env = os.environ.copy()
        subprocess_env["PYTHONPATH"] = os.pathsep.join([os.getcwd()] + sys.path)

        # Keep only JSON serializable environment items
        filtered_env = dict((key, value) for key, value in env.items() if isinstance(value, JSON_SERIALIZABLE_TYPES))

        # Save parameters
        args = (target, source, filtered_env)
        data = dict(fn=function_name, args=args)
        json_path = os.path.join(os.environ["TMP"], uuid.uuid4().hex + ".json")
        with open(json_path, "wt", encoding="utf-8", newline="\n") as json_file:
            json.dump(data, json_file, indent=2)
        json_file_size = os.stat(json_path).st_size

        if env["verbose"]:
            print(
                "Executing builder function in subprocess: "
                "module_path=%r, parameter_file=%r, parameter_file_size=%r, target=%r, source=%r"
                % (module_path, json_path, json_file_size, target, source)
            )
        try:
            exit_code = subprocess.call([sys.executable, module_path, json_path], env=subprocess_env)
        finally:
            try:
                os.remove(json_path)
            except OSError as e:
                # Do not fail the entire build if it cannot delete a temporary file
                print(
                    "WARNING: Could not delete temporary file: path=%r; [%s] %s" % (json_path, e.__class__.__name__, e)
                )

        # Must succeed
        if exit_code:
            raise RuntimeError(
                "Failed to run builder function in subprocess: module_path=%r; data=%r" % (module_path, data)
            )

    return wrapper


def subprocess_main(namespace):
    with open(sys.argv[1]) as json_file:
        data = json.load(json_file)

    fn = namespace[data["fn"]]
    fn(*data["args"])


# CPU architecture options.
architectures = ["x86_32", "x86_64", "arm32", "arm64", "rv64", "ppc32", "ppc64", "wasm32"]
architecture_aliases = {
    "x86": "x86_32",
    "x64": "x86_64",
    "amd64": "x86_64",
    "armv7": "arm32",
    "armv8": "arm64",
    "arm64v8": "arm64",
    "aarch64": "arm64",
    "rv": "rv64",
    "riscv": "rv64",
    "riscv64": "rv64",
    "ppcle": "ppc32",
    "ppc": "ppc32",
    "ppc64le": "ppc64",
}


def detect_arch():
    host_machine = platform.machine().lower()
    if host_machine in architectures:
        return host_machine
    elif host_machine in architecture_aliases.keys():
        return architecture_aliases[host_machine]
    elif "86" in host_machine:
        # Catches x86, i386, i486, i586, i686, etc.
        return "x86_32"
    else:
        print("Unsupported CPU architecture: " + host_machine)
        print("Falling back to x86_64.")
        return "x86_64"


def generate_export_icons(platform_path, platform_name):
    """
    Generate headers for logo and run icon for the export plugin.
    """
    export_path = platform_path + "/export"
    svg_names = []
    if os.path.isfile(export_path + "/logo.svg"):
        svg_names.append("logo")
    if os.path.isfile(export_path + "/run_icon.svg"):
        svg_names.append("run_icon")

    for name in svg_names:
        svgf = open(export_path + "/" + name + ".svg", "rb")
        b = svgf.read(1)
        svg_str = " /* AUTOGENERATED FILE, DO NOT EDIT */ \n"
        svg_str += " static const char *_" + platform_name + "_" + name + '_svg = "'
        while len(b) == 1:
            svg_str += "\\" + hex(ord(b))[1:]
            b = svgf.read(1)

        svg_str += '";\n'

        svgf.close()

        # NOTE: It is safe to generate this file here, since this is still executed serially.
        wf = export_path + "/" + name + "_svg.gen.h"
        with open(wf, "w", encoding="utf-8", newline="\n") as svgw:
            svgw.write(svg_str)


def get_build_version(short):
    import version

    name = "custom_build"
    if os.getenv("BUILD_NAME") != None:
        name = os.getenv("BUILD_NAME")
    v = "%d.%d" % (version.major, version.minor)
    if version.patch > 0:
        v += ".%d" % version.patch
    status = version.status
    if not short:
        if os.getenv("GODOT_VERSION_STATUS") != None:
            status = str(os.getenv("GODOT_VERSION_STATUS"))
        v += ".%s.%s" % (status, name)
    return v


def lipo(prefix, suffix):
    from pathlib import Path

    target_bin = ""
    lipo_command = ["lipo", "-create"]
    arch_found = 0

    for arch in architectures:
        bin_name = prefix + "." + arch + suffix
        if Path(bin_name).is_file():
            target_bin = bin_name
            lipo_command += [bin_name]
            arch_found += 1

    if arch_found > 1:
        target_bin = prefix + ".fat" + suffix
        lipo_command += ["-output", target_bin]
        subprocess.run(lipo_command)

    return target_bin


def get_mvk_sdk_path(osname):
    def int_or_zero(i):
        try:
            return int(i)
        except:
            return 0

    def ver_parse(a):
        return [int_or_zero(i) for i in a.split(".")]

    dirname = os.path.expanduser("~/VulkanSDK")
    if not os.path.exists(dirname):
        return ""

    ver_min = ver_parse("1.3.231.0")
    ver_num = ver_parse("0.0.0.0")
    files = os.listdir(dirname)
    lib_name_out = dirname
    for file in files:
        if os.path.isdir(os.path.join(dirname, file)):
            ver_comp = ver_parse(file)
            if ver_comp > ver_num and ver_comp >= ver_min:
                # Try new SDK location.
                lib_name = os.path.join(os.path.join(dirname, file), "macOS/lib/MoltenVK.xcframework/" + osname + "/")
                if os.path.isfile(os.path.join(lib_name, "libMoltenVK.a")):
                    ver_num = ver_comp
                    lib_name_out = os.path.join(os.path.join(dirname, file), "macOS/lib/MoltenVK.xcframework")
                else:
                    # Try old SDK location.
                    lib_name = os.path.join(
                        os.path.join(dirname, file), "MoltenVK/MoltenVK.xcframework/" + osname + "/"
                    )
                    if os.path.isfile(os.path.join(lib_name, "libMoltenVK.a")):
                        ver_num = ver_comp
                        lib_name_out = os.path.join(os.path.join(dirname, file), "MoltenVK/MoltenVK.xcframework")

    return lib_name_out


def detect_mvk(env, osname):
    mvk_list = [
        get_mvk_sdk_path(osname),
        "/opt/homebrew/Frameworks/MoltenVK.xcframework",
        "/usr/local/homebrew/Frameworks/MoltenVK.xcframework",
        "/opt/local/Frameworks/MoltenVK.xcframework",
    ]
    if env["vulkan_sdk_path"] != "":
        mvk_list.insert(0, os.path.expanduser(env["vulkan_sdk_path"]))
        mvk_list.insert(
            0,
            os.path.join(os.path.expanduser(env["vulkan_sdk_path"]), "macOS/lib/MoltenVK.xcframework"),
        )
        mvk_list.insert(
            0,
            os.path.join(os.path.expanduser(env["vulkan_sdk_path"]), "MoltenVK/MoltenVK.xcframework"),
        )

    for mvk_path in mvk_list:
        if mvk_path and os.path.isfile(os.path.join(mvk_path, osname + "/libMoltenVK.a")):
            mvk_found = True
            print("MoltenVK found at: " + mvk_path)
            return mvk_path

    return ""