import os
import sys
import re
import glob
import subprocess
from collections import OrderedDict
from collections.abc import Mapping
from typing import Iterator
from pathlib import Path
from os.path import normpath, basename

# Get the "Godot" folder name ahead of time
base_folder_path = str(os.path.abspath(Path(__file__).parent)) + "/"
base_folder_only = os.path.basename(os.path.normpath(base_folder_path))
# Listing all the folders we have converted
# for SCU in scu_builders.py
_scu_folders = set()


def set_scu_folders(scu_folders):
    global _scu_folders
    _scu_folders = scu_folders


def add_source_files_orig(self, sources, files, allow_gen=False):
    # Convert string to list of absolute paths (including expanding wildcard)
    if isinstance(files, (str, bytes)):
        # Keep SCons project-absolute path as they are (no wildcard support)
        if files.startswith("#"):
            if "*" in files:
                print("ERROR: Wildcards can't be expanded in SCons project-absolute path: '{}'".format(files))
                return
            files = [files]
        else:
            # Exclude .gen.cpp files from globbing, to avoid including obsolete ones.
            # They should instead be added manually.
            skip_gen_cpp = "*" in files
            dir_path = self.Dir(".").abspath
            files = sorted(glob.glob(dir_path + "/" + files))
            if skip_gen_cpp and not allow_gen:
                files = [f for f in files if not f.endswith(".gen.cpp")]

    # Add each path as compiled Object following environment (self) configuration
    for path in files:
        obj = self.Object(path)
        if obj in sources:
            print('WARNING: Object "{}" already included in environment sources.'.format(obj))
            continue
        sources.append(obj)


# The section name is used for checking
# the hash table to see whether the folder
# is included in the SCU build.
# It will be something like "core/math".
def _find_scu_section_name(subdir):
    section_path = os.path.abspath(subdir) + "/"

    folders = []
    folder = ""

    for i in range(8):
        folder = os.path.dirname(section_path)
        folder = os.path.basename(folder)
        if folder == base_folder_only:
            break
        folders += [folder]
        section_path += "../"
        section_path = os.path.abspath(section_path) + "/"

    section_name = ""
    for n in range(len(folders)):
        # section_name += folders[len(folders) - n - 1] + " "
        section_name += folders[len(folders) - n - 1]
        if n != (len(folders) - 1):
            section_name += "/"

    return section_name


def add_source_files_scu(self, sources, files, allow_gen=False):
    if self["scu_build"] and isinstance(files, str):
        if "*." not in files:
            return False

        # If the files are in a subdirectory, we want to create the scu gen
        # files inside this subdirectory.
        subdir = os.path.dirname(files)
        if subdir != "":
            subdir += "/"

        section_name = _find_scu_section_name(subdir)
        # if the section name is in the hash table?
        # i.e. is it part of the SCU build?
        global _scu_folders
        if section_name not in (_scu_folders):
            return False

        if self["verbose"]:
            print("SCU building " + section_name)

        # Add all the gen.cpp files in the SCU directory
        add_source_files_orig(self, sources, subdir + "scu/scu_*.gen.cpp", True)
        return True
    return False


# Either builds the folder using the SCU system,
# or reverts to regular build.
def add_source_files(self, sources, files, allow_gen=False):
    if not add_source_files_scu(self, sources, files, allow_gen):
        # Wraps the original function when scu build is not active.
        add_source_files_orig(self, sources, files, allow_gen)
        return False
    return True


def disable_warnings(self):
    # 'self' is the environment
    if self.msvc:
        # We have to remove existing warning level defines before appending /w,
        # otherwise we get: "warning D9025 : overriding '/W3' with '/w'"
        self["CCFLAGS"] = [x for x in self["CCFLAGS"] if not (x.startswith("/W") or x.startswith("/w"))]
        self["CFLAGS"] = [x for x in self["CFLAGS"] if not (x.startswith("/W") or x.startswith("/w"))]
        self["CXXFLAGS"] = [x for x in self["CXXFLAGS"] if not (x.startswith("/W") or x.startswith("/w"))]
        self.AppendUnique(CCFLAGS=["/w"])
    else:
        self.AppendUnique(CCFLAGS=["-w"])


def force_optimization_on_debug(self):
    # 'self' is the environment
    if self["target"] == "template_release":
        return

    if self.msvc:
        # We have to remove existing optimization level defines before appending /O2,
        # otherwise we get: "warning D9025 : overriding '/0d' with '/02'"
        self["CCFLAGS"] = [x for x in self["CCFLAGS"] if not x.startswith("/O")]
        self["CFLAGS"] = [x for x in self["CFLAGS"] if not x.startswith("/O")]
        self["CXXFLAGS"] = [x for x in self["CXXFLAGS"] if not x.startswith("/O")]
        self.AppendUnique(CCFLAGS=["/O2"])
    else:
        self.AppendUnique(CCFLAGS=["-O3"])


def add_module_version_string(self, s):
    self.module_version_string += "." + s


def get_version_info(module_version_string="", silent=False):
    build_name = "custom_build"
    if os.getenv("BUILD_NAME") != None:
        build_name = str(os.getenv("BUILD_NAME"))
        if not silent:
            print(f"Using custom build name: '{build_name}'.")

    import version

    version_info = {
        "short_name": str(version.short_name),
        "name": str(version.name),
        "major": int(version.major),
        "minor": int(version.minor),
        "patch": int(version.patch),
        "status": str(version.status),
        "build": str(build_name),
        "module_config": str(version.module_config) + module_version_string,
        "year": int(version.year),
        "website": str(version.website),
        "docs_branch": str(version.docs),
    }

    # For dev snapshots (alpha, beta, RC, etc.) we do not commit status change to Git,
    # so this define provides a way to override it without having to modify the source.
    if os.getenv("GODOT_VERSION_STATUS") != None:
        version_info["status"] = str(os.getenv("GODOT_VERSION_STATUS"))
        if not silent:
            print(f"Using version status '{version_info['status']}', overriding the original '{version.status}'.")

    # Parse Git hash if we're in a Git repo.
    githash = ""
    gitfolder = ".git"

    if os.path.isfile(".git"):
        module_folder = open(".git", "r").readline().strip()
        if module_folder.startswith("gitdir: "):
            gitfolder = module_folder[8:]

    if os.path.isfile(os.path.join(gitfolder, "HEAD")):
        head = open(os.path.join(gitfolder, "HEAD"), "r", encoding="utf8").readline().strip()
        if head.startswith("ref: "):
            ref = head[5:]
            # If this directory is a Git worktree instead of a root clone.
            parts = gitfolder.split("/")
            if len(parts) > 2 and parts[-2] == "worktrees":
                gitfolder = "/".join(parts[0:-2])
            head = os.path.join(gitfolder, ref)
            packedrefs = os.path.join(gitfolder, "packed-refs")
            if os.path.isfile(head):
                githash = open(head, "r").readline().strip()
            elif os.path.isfile(packedrefs):
                # Git may pack refs into a single file. This code searches .git/packed-refs file for the current ref's hash.
                # https://mirrors.edge.kernel.org/pub/software/scm/git/docs/git-pack-refs.html
                for line in open(packedrefs, "r").read().splitlines():
                    if line.startswith("#"):
                        continue
                    (line_hash, line_ref) = line.split(" ")
                    if ref == line_ref:
                        githash = line_hash
                        break
        else:
            githash = head

    version_info["git_hash"] = githash

    return version_info


def generate_version_header(module_version_string=""):
    version_info = get_version_info(module_version_string)

    # NOTE: It is safe to generate these files here, since this is still executed serially.

    f = open("core/version_generated.gen.h", "w")
    f.write(
        """/* THIS FILE IS GENERATED DO NOT EDIT */
#ifndef VERSION_GENERATED_GEN_H
#define VERSION_GENERATED_GEN_H
#define VERSION_SHORT_NAME "{short_name}"
#define VERSION_NAME "{name}"
#define VERSION_MAJOR {major}
#define VERSION_MINOR {minor}
#define VERSION_PATCH {patch}
#define VERSION_STATUS "{status}"
#define VERSION_BUILD "{build}"
#define VERSION_MODULE_CONFIG "{module_config}"
#define VERSION_YEAR {year}
#define VERSION_WEBSITE "{website}"
#define VERSION_DOCS_BRANCH "{docs_branch}"
#define VERSION_DOCS_URL "https://docs.godotengine.org/en/" VERSION_DOCS_BRANCH
#endif // VERSION_GENERATED_GEN_H
""".format(
            **version_info
        )
    )
    f.close()

    fhash = open("core/version_hash.gen.cpp", "w")
    fhash.write(
        """/* THIS FILE IS GENERATED DO NOT EDIT */
#include "core/version.h"
const char *const VERSION_HASH = "{git_hash}";
""".format(
            **version_info
        )
    )
    fhash.close()


def parse_cg_file(fname, uniforms, sizes, conditionals):

    fs = open(fname, "r")
    line = fs.readline()

    while line:

        if re.match(r"^\s*uniform", line):

            res = re.match(r"uniform ([\d\w]*) ([\d\w]*)")
            type = res.groups(1)
            name = res.groups(2)

            uniforms.append(name)

            if type.find("texobj") != -1:
                sizes.append(1)
            else:
                t = re.match(r"float(\d)x(\d)", type)
                if t:
                    sizes.append(int(t.groups(1)) * int(t.groups(2)))
                else:
                    t = re.match(r"float(\d)", type)
                    sizes.append(int(t.groups(1)))

            if line.find("[branch]") != -1:
                conditionals.append(name)

        line = fs.readline()

    fs.close()


def get_cmdline_bool(option, default):
    """We use `ARGUMENTS.get()` to check if options were manually overridden on the command line,
    and SCons' _text2bool helper to convert them to booleans, otherwise they're handled as strings.
    """
    from SCons.Script import ARGUMENTS
    from SCons.Variables.BoolVariable import _text2bool

    cmdline_val = ARGUMENTS.get(option)
    if cmdline_val is not None:
        return _text2bool(cmdline_val)
    else:
        return default


def detect_modules(search_path, recursive=False):
    """Detects and collects a list of C++ modules at specified path

    `search_path` - a directory path containing modules. The path may point to
    a single module, which may have other nested modules. A module must have
    "register_types.h", "SCsub", "config.py" files created to be detected.

    `recursive` - if `True`, then all subdirectories are searched for modules as
    specified by the `search_path`, otherwise collects all modules under the
    `search_path` directory. If the `search_path` is a module, it is collected
    in all cases.

    Returns an `OrderedDict` with module names as keys, and directory paths as
    values. If a path is relative, then it is a built-in module. If a path is
    absolute, then it is a custom module collected outside of the engine source.
    """
    modules = OrderedDict()

    def add_module(path):
        module_name = os.path.basename(path)
        module_path = path.replace("\\", "/")  # win32
        modules[module_name] = module_path

    def is_engine(path):
        # Prevent recursively detecting modules in self and other
        # Godot sources when using `custom_modules` build option.
        version_path = os.path.join(path, "version.py")
        if os.path.exists(version_path):
            with open(version_path) as f:
                if 'short_name = "godot"' in f.read():
                    return True
        return False

    def get_files(path):
        files = glob.glob(os.path.join(path, "*"))
        # Sort so that `register_module_types` does not change that often,
        # and plugins are registered in alphabetic order as well.
        files.sort()
        return files

    if not recursive:
        if is_module(search_path):
            add_module(search_path)
        for path in get_files(search_path):
            if is_engine(path):
                continue
            if is_module(path):
                add_module(path)
    else:
        to_search = [search_path]
        while to_search:
            path = to_search.pop()
            if is_module(path):
                add_module(path)
            for child in get_files(path):
                if not os.path.isdir(child):
                    continue
                if is_engine(child):
                    continue
                to_search.insert(0, child)
    return modules


def is_module(path):
    if not os.path.isdir(path):
        return False
    must_exist = ["register_types.h", "SCsub", "config.py"]
    for f in must_exist:
        if not os.path.exists(os.path.join(path, f)):
            return False
    return True


def write_disabled_classes(class_list):
    f = open("core/disabled_classes.gen.h", "w")
    f.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
    f.write("#ifndef DISABLED_CLASSES_GEN_H\n")
    f.write("#define DISABLED_CLASSES_GEN_H\n\n")
    for c in class_list:
        cs = c.strip()
        if cs != "":
            f.write("#define ClassDB_Disable_" + cs + " 1\n")
    f.write("\n#endif\n")


def write_modules(modules):
    includes_cpp = ""
    initialize_cpp = ""
    uninitialize_cpp = ""

    for name, path in modules.items():
        try:
            with open(os.path.join(path, "register_types.h")):
                includes_cpp += '#include "' + path + '/register_types.h"\n'
                initialize_cpp += "#ifdef MODULE_" + name.upper() + "_ENABLED\n"
                initialize_cpp += "\tinitialize_" + name + "_module(p_level);\n"
                initialize_cpp += "#endif\n"
                uninitialize_cpp += "#ifdef MODULE_" + name.upper() + "_ENABLED\n"
                uninitialize_cpp += "\tuninitialize_" + name + "_module(p_level);\n"
                uninitialize_cpp += "#endif\n"
        except OSError:
            pass

    modules_cpp = """// register_module_types.gen.cpp
/* THIS FILE IS GENERATED DO NOT EDIT */
#include "register_module_types.h"

#include "modules/modules_enabled.gen.h"

%s

void initialize_modules(ModuleInitializationLevel p_level) {
%s
}

void uninitialize_modules(ModuleInitializationLevel p_level) {
%s
}
""" % (
        includes_cpp,
        initialize_cpp,
        uninitialize_cpp,
    )

    # NOTE: It is safe to generate this file here, since this is still executed serially
    with open("modules/register_module_types.gen.cpp", "w") as f:
        f.write(modules_cpp)


def convert_custom_modules_path(path):
    if not path:
        return path
    path = os.path.realpath(os.path.expanduser(os.path.expandvars(path)))
    err_msg = "Build option 'custom_modules' must %s"
    if not os.path.isdir(path):
        raise ValueError(err_msg % "point to an existing directory.")
    if path == os.path.realpath("modules"):
        raise ValueError(err_msg % "be a directory other than built-in `modules` directory.")
    return path


def disable_module(self):
    self.disabled_modules.append(self.current_module)


def module_add_dependencies(self, module, dependencies, optional=False):
    """
    Adds dependencies for a given module.
    Meant to be used in module `can_build` methods.
    """
    if module not in self.module_dependencies:
        self.module_dependencies[module] = [[], []]
    if optional:
        self.module_dependencies[module][1].extend(dependencies)
    else:
        self.module_dependencies[module][0].extend(dependencies)


def module_check_dependencies(self, module):
    """
    Checks if module dependencies are enabled for a given module,
    and prints a warning if they aren't.
    Meant to be used in module `can_build` methods.
    Returns a boolean (True if dependencies are satisfied).
    """
    missing_deps = []
    required_deps = self.module_dependencies[module][0] if module in self.module_dependencies else []
    for dep in required_deps:
        opt = "module_{}_enabled".format(dep)
        if not opt in self or not self[opt]:
            missing_deps.append(dep)

    if missing_deps != []:
        print(
            "Disabling '{}' module as the following dependencies are not satisfied: {}".format(
                module, ", ".join(missing_deps)
            )
        )
        return False
    else:
        return True


def sort_module_list(env):
    out = OrderedDict()
    deps = {k: v[0] + list(filter(lambda x: x in env.module_list, v[1])) for k, v in env.module_dependencies.items()}

    frontier = list(env.module_list.keys())
    explored = []
    while len(frontier):
        cur = frontier.pop()
        deps_list = deps[cur] if cur in deps else []
        if len(deps_list) and any([d not in explored for d in deps_list]):
            # Will explore later, after its dependencies
            frontier.insert(0, cur)
            continue
        explored.append(cur)
    for k in explored:
        env.module_list.move_to_end(k)


def use_windows_spawn_fix(self, platform=None):

    if os.name != "nt":
        return  # not needed, only for windows

    # On Windows, due to the limited command line length, when creating a static library
    # from a very high number of objects SCons will invoke "ar" once per object file;
    # that makes object files with same names to be overwritten so the last wins and
    # the library loses symbols defined by overwritten objects.
    # By enabling quick append instead of the default mode (replacing), libraries will
    # got built correctly regardless the invocation strategy.
    # Furthermore, since SCons will rebuild the library from scratch when an object file
    # changes, no multiple versions of the same object file will be present.
    self.Replace(ARFLAGS="q")

    def mySubProcess(cmdline, env):

        startupinfo = subprocess.STARTUPINFO()
        startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
        popen_args = {
            "stdin": subprocess.PIPE,
            "stdout": subprocess.PIPE,
            "stderr": subprocess.PIPE,
            "startupinfo": startupinfo,
            "shell": False,
            "env": env,
        }
        if sys.version_info >= (3, 7, 0):
            popen_args["text"] = True
        proc = subprocess.Popen(cmdline, **popen_args)
        _, err = proc.communicate()
        rv = proc.wait()
        if rv:
            print("=====")
            print(err)
            print("=====")
        return rv

    def mySpawn(sh, escape, cmd, args, env):

        newargs = " ".join(args[1:])
        cmdline = cmd + " " + newargs

        rv = 0
        env = {str(key): str(value) for key, value in iter(env.items())}
        if len(cmdline) > 32000 and cmd.endswith("ar"):
            cmdline = cmd + " " + args[1] + " " + args[2] + " "
            for i in range(3, len(args)):
                rv = mySubProcess(cmdline + args[i], env)
                if rv:
                    break
        else:
            rv = mySubProcess(cmdline, env)

        return rv

    self["SPAWN"] = mySpawn


def save_active_platforms(apnames, ap):

    for x in ap:
        svg_names = []
        if os.path.isfile(x + "/logo.svg"):
            svg_names.append("logo")
        if os.path.isfile(x + "/run_icon.svg"):
            svg_names.append("run_icon")

        for name in svg_names:
            svgf = open(x + "/" + name + ".svg", "rb")
            b = svgf.read(1)
            svg_str = " /* AUTOGENERATED FILE, DO NOT EDIT */ \n"
            svg_str += " static const char *_" + x[9:] + "_" + 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 = x + "/" + name + "_svg.gen.h"
            with open(wf, "w") as svgw:
                svgw.write(svg_str)


def no_verbose(sys, env):

    colors = {}

    # Colors are disabled in non-TTY environments such as pipes. This means
    # that if output is redirected to a file, it will not contain color codes
    if sys.stdout.isatty():
        colors["blue"] = "\033[0;94m"
        colors["bold_blue"] = "\033[1;94m"
        colors["reset"] = "\033[0m"
    else:
        colors["blue"] = ""
        colors["bold_blue"] = ""
        colors["reset"] = ""

    # There is a space before "..." to ensure that source file names can be
    # Ctrl + clicked in the VS Code terminal.
    compile_source_message = "{}Compiling {}$SOURCE{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )
    java_compile_source_message = "{}Compiling {}$SOURCE{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )
    compile_shared_source_message = "{}Compiling shared {}$SOURCE{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )
    link_program_message = "{}Linking Program {}$TARGET{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )
    link_library_message = "{}Linking Static Library {}$TARGET{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )
    ranlib_library_message = "{}Ranlib Library {}$TARGET{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )
    link_shared_library_message = "{}Linking Shared Library {}$TARGET{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )
    java_library_message = "{}Creating Java Archive {}$TARGET{} ...{}".format(
        colors["blue"], colors["bold_blue"], colors["blue"], colors["reset"]
    )

    env.Append(CXXCOMSTR=[compile_source_message])
    env.Append(CCCOMSTR=[compile_source_message])
    env.Append(SHCCCOMSTR=[compile_shared_source_message])
    env.Append(SHCXXCOMSTR=[compile_shared_source_message])
    env.Append(ARCOMSTR=[link_library_message])
    env.Append(RANLIBCOMSTR=[ranlib_library_message])
    env.Append(SHLINKCOMSTR=[link_shared_library_message])
    env.Append(LINKCOMSTR=[link_program_message])
    env.Append(JARCOMSTR=[java_library_message])
    env.Append(JAVACCOMSTR=[java_compile_source_message])


def detect_visual_c_compiler_version(tools_env):
    # tools_env is the variable scons uses to call tools that execute tasks, SCons's env['ENV'] that executes tasks...
    # (see the SCons documentation for more information on what it does)...
    # in order for this function to be well encapsulated i choose to force it to receive SCons's TOOLS env (env['ENV']
    # and not scons setup environment (env)... so make sure you call the right environment on it or it will fail to detect
    # the proper vc version that will be called

    # There is no flag to give to visual c compilers to set the architecture, i.e. scons arch argument (x86_32, x86_64, arm64, etc.).
    # There are many different cl.exe files that are run, and each one compiles & links to a different architecture
    # As far as I know, the only way to figure out what compiler will be run when Scons calls cl.exe via Program()
    # is to check the PATH variable and figure out which one will be called first. Code below does that and returns:
    # the following string values:

    # ""              Compiler not detected
    # "amd64"         Native 64 bit compiler
    # "amd64_x86"     64 bit Cross Compiler for 32 bit
    # "x86"           Native 32 bit compiler
    # "x86_amd64"     32 bit Cross Compiler for 64 bit

    # There are other architectures, but Godot does not support them currently, so this function does not detect arm/amd64_arm
    # and similar architectures/compilers

    # Set chosen compiler to "not detected"
    vc_chosen_compiler_index = -1
    vc_chosen_compiler_str = ""

    # Start with Pre VS 2017 checks which uses VCINSTALLDIR:
    if "VCINSTALLDIR" in tools_env:
        # print("Checking VCINSTALLDIR")

        # find() works with -1 so big ifs below are needed... the simplest solution, in fact
        # First test if amd64 and amd64_x86 compilers are present in the path
        vc_amd64_compiler_detection_index = tools_env["PATH"].find(tools_env["VCINSTALLDIR"] + "BIN\\amd64;")
        if vc_amd64_compiler_detection_index > -1:
            vc_chosen_compiler_index = vc_amd64_compiler_detection_index
            vc_chosen_compiler_str = "amd64"

        vc_amd64_x86_compiler_detection_index = tools_env["PATH"].find(tools_env["VCINSTALLDIR"] + "BIN\\amd64_x86;")
        if vc_amd64_x86_compiler_detection_index > -1 and (
            vc_chosen_compiler_index == -1 or vc_chosen_compiler_index > vc_amd64_x86_compiler_detection_index
        ):
            vc_chosen_compiler_index = vc_amd64_x86_compiler_detection_index
            vc_chosen_compiler_str = "amd64_x86"

        # Now check the 32 bit compilers
        vc_x86_compiler_detection_index = tools_env["PATH"].find(tools_env["VCINSTALLDIR"] + "BIN;")
        if vc_x86_compiler_detection_index > -1 and (
            vc_chosen_compiler_index == -1 or vc_chosen_compiler_index > vc_x86_compiler_detection_index
        ):
            vc_chosen_compiler_index = vc_x86_compiler_detection_index
            vc_chosen_compiler_str = "x86"

        vc_x86_amd64_compiler_detection_index = tools_env["PATH"].find(tools_env["VCINSTALLDIR"] + "BIN\\x86_amd64;")
        if vc_x86_amd64_compiler_detection_index > -1 and (
            vc_chosen_compiler_index == -1 or vc_chosen_compiler_index > vc_x86_amd64_compiler_detection_index
        ):
            vc_chosen_compiler_index = vc_x86_amd64_compiler_detection_index
            vc_chosen_compiler_str = "x86_amd64"

    # and for VS 2017 and newer we check VCTOOLSINSTALLDIR:
    if "VCTOOLSINSTALLDIR" in tools_env:

        # Newer versions have a different path available
        vc_amd64_compiler_detection_index = (
            tools_env["PATH"].upper().find(tools_env["VCTOOLSINSTALLDIR"].upper() + "BIN\\HOSTX64\\X64;")
        )
        if vc_amd64_compiler_detection_index > -1:
            vc_chosen_compiler_index = vc_amd64_compiler_detection_index
            vc_chosen_compiler_str = "amd64"

        vc_amd64_x86_compiler_detection_index = (
            tools_env["PATH"].upper().find(tools_env["VCTOOLSINSTALLDIR"].upper() + "BIN\\HOSTX64\\X86;")
        )
        if vc_amd64_x86_compiler_detection_index > -1 and (
            vc_chosen_compiler_index == -1 or vc_chosen_compiler_index > vc_amd64_x86_compiler_detection_index
        ):
            vc_chosen_compiler_index = vc_amd64_x86_compiler_detection_index
            vc_chosen_compiler_str = "amd64_x86"

        vc_x86_compiler_detection_index = (
            tools_env["PATH"].upper().find(tools_env["VCTOOLSINSTALLDIR"].upper() + "BIN\\HOSTX86\\X86;")
        )
        if vc_x86_compiler_detection_index > -1 and (
            vc_chosen_compiler_index == -1 or vc_chosen_compiler_index > vc_x86_compiler_detection_index
        ):
            vc_chosen_compiler_index = vc_x86_compiler_detection_index
            vc_chosen_compiler_str = "x86"

        vc_x86_amd64_compiler_detection_index = (
            tools_env["PATH"].upper().find(tools_env["VCTOOLSINSTALLDIR"].upper() + "BIN\\HOSTX86\\X64;")
        )
        if vc_x86_amd64_compiler_detection_index > -1 and (
            vc_chosen_compiler_index == -1 or vc_chosen_compiler_index > vc_x86_amd64_compiler_detection_index
        ):
            vc_chosen_compiler_str = "x86_amd64"

    return vc_chosen_compiler_str


def find_visual_c_batch_file(env):
    from SCons.Tool.MSCommon.vc import (
        get_default_version,
        get_host_target,
        find_batch_file,
    )

    # Syntax changed in SCons 4.4.0.
    from SCons import __version__ as scons_raw_version

    scons_ver = env._get_major_minor_revision(scons_raw_version)

    version = get_default_version(env)

    if scons_ver >= (4, 4, 0):
        (host_platform, target_platform, _) = get_host_target(env, version)
    else:
        (host_platform, target_platform, _) = get_host_target(env)

    return find_batch_file(env, version, host_platform, target_platform)[0]


def generate_cpp_hint_file(filename):
    if os.path.isfile(filename):
        # Don't overwrite an existing hint file since the user may have customized it.
        pass
    else:
        try:
            with open(filename, "w") as fd:
                fd.write("#define GDCLASS(m_class, m_inherits)\n")
        except OSError:
            print("Could not write cpp.hint file.")


def glob_recursive(pattern, node="."):
    from SCons import Node
    from SCons.Script import Glob

    results = []
    for f in Glob(str(node) + "/*", source=True):
        if type(f) is Node.FS.Dir:
            results += glob_recursive(pattern, f)
    results += Glob(str(node) + "/" + pattern, source=True)
    return results


def add_to_vs_project(env, sources):
    for x in sources:
        if type(x) == type(""):
            fname = env.File(x).path
        else:
            fname = env.File(x)[0].path
        pieces = fname.split(".")
        if len(pieces) > 0:
            basename = pieces[0]
            basename = basename.replace("\\\\", "/")
            if os.path.isfile(basename + ".h"):
                env.vs_incs += [basename + ".h"]
            elif os.path.isfile(basename + ".hpp"):
                env.vs_incs += [basename + ".hpp"]
            if os.path.isfile(basename + ".c"):
                env.vs_srcs += [basename + ".c"]
            elif os.path.isfile(basename + ".cpp"):
                env.vs_srcs += [basename + ".cpp"]


def generate_vs_project(env, num_jobs, project_name="godot"):
    batch_file = find_visual_c_batch_file(env)
    if batch_file:

        class ModuleConfigs(Mapping):
            # This version information (Win32, x64, Debug, Release) seems to be
            # required for Visual Studio to understand that it needs to generate an NMAKE
            # project. Do not modify without knowing what you are doing.
            PLATFORMS = ["Win32", "x64"]
            PLATFORM_IDS = ["x86_32", "x86_64"]
            CONFIGURATIONS = ["editor", "template_release", "template_debug"]
            DEV_SUFFIX = ".dev" if env["dev_build"] else ""

            @staticmethod
            def for_every_variant(value):
                return [value for _ in range(len(ModuleConfigs.CONFIGURATIONS) * len(ModuleConfigs.PLATFORMS))]

            def __init__(self):
                shared_targets_array = []
                self.names = []
                self.arg_dict = {
                    "variant": [],
                    "runfile": shared_targets_array,
                    "buildtarget": shared_targets_array,
                    "cpppaths": [],
                    "cppdefines": [],
                    "cmdargs": [],
                }
                self.add_mode()  # default

            def add_mode(
                self,
                name: str = "",
                includes: str = "",
                cli_args: str = "",
                defines=None,
            ):
                if defines is None:
                    defines = []
                self.names.append(name)
                self.arg_dict["variant"] += [
                    f'{config}{f"_[{name}]" if name else ""}|{platform}'
                    for config in ModuleConfigs.CONFIGURATIONS
                    for platform in ModuleConfigs.PLATFORMS
                ]
                self.arg_dict["runfile"] += [
                    f'bin\\godot.windows.{config}{ModuleConfigs.DEV_SUFFIX}{".double" if env["precision"] == "double" else ""}.{plat_id}{f".{name}" if name else ""}.exe'
                    for config in ModuleConfigs.CONFIGURATIONS
                    for plat_id in ModuleConfigs.PLATFORM_IDS
                ]
                self.arg_dict["cpppaths"] += ModuleConfigs.for_every_variant(env["CPPPATH"] + [includes])
                self.arg_dict["cppdefines"] += ModuleConfigs.for_every_variant(list(env["CPPDEFINES"]) + defines)
                self.arg_dict["cmdargs"] += ModuleConfigs.for_every_variant(cli_args)

            def build_commandline(self, commands):
                configuration_getter = (
                    "$(Configuration"
                    + "".join([f'.Replace("{name}", "")' for name in self.names[1:]])
                    + '.Replace("_[]", "")'
                    + ")"
                )

                common_build_prefix = [
                    'cmd /V /C set "plat=$(PlatformTarget)"',
                    '(if "$(PlatformTarget)"=="x64" (set "plat=x86_amd64"))',
                    'call "' + batch_file + '" !plat!',
                ]

                # Windows allows us to have spaces in paths, so we need
                # to double quote off the directory. However, the path ends
                # in a backslash, so we need to remove this, lest it escape the
                # last double quote off, confusing MSBuild
                common_build_postfix = [
                    "--directory=\"$(ProjectDir.TrimEnd('\\'))\"",
                    "platform=windows",
                    f"target={configuration_getter}",
                    "progress=no",
                    "-j%s" % num_jobs,
                ]

                if env["dev_build"]:
                    common_build_postfix.append("dev_build=yes")

                if env["dev_mode"]:
                    common_build_postfix.append("dev_mode=yes")

                elif env["tests"]:
                    common_build_postfix.append("tests=yes")

                if env["custom_modules"]:
                    common_build_postfix.append("custom_modules=%s" % env["custom_modules"])

                if env["precision"] == "double":
                    common_build_postfix.append("precision=double")

                result = " ^& ".join(common_build_prefix + [" ".join([commands] + common_build_postfix)])
                return result

            # Mappings interface definitions

            def __iter__(self) -> Iterator[str]:
                for x in self.arg_dict:
                    yield x

            def __len__(self) -> int:
                return len(self.names)

            def __getitem__(self, k: str):
                return self.arg_dict[k]

        add_to_vs_project(env, env.core_sources)
        add_to_vs_project(env, env.drivers_sources)
        add_to_vs_project(env, env.main_sources)
        add_to_vs_project(env, env.modules_sources)
        add_to_vs_project(env, env.scene_sources)
        add_to_vs_project(env, env.servers_sources)
        if env["tests"]:
            add_to_vs_project(env, env.tests_sources)
        if env.editor_build:
            add_to_vs_project(env, env.editor_sources)

        for header in glob_recursive("**/*.h"):
            env.vs_incs.append(str(header))

        module_configs = ModuleConfigs()

        if env.get("module_mono_enabled"):
            mono_defines = [("GD_MONO_HOT_RELOAD",)] if env.editor_build else []
            module_configs.add_mode(
                "mono",
                cli_args="module_mono_enabled=yes",
                defines=mono_defines,
            )

        env["MSVSBUILDCOM"] = module_configs.build_commandline("scons")
        env["MSVSREBUILDCOM"] = module_configs.build_commandline("scons vsproj=yes")
        env["MSVSCLEANCOM"] = module_configs.build_commandline("scons --clean")
        if not env.get("MSVS"):
            env["MSVS"]["PROJECTSUFFIX"] = ".vcxproj"
            env["MSVS"]["SOLUTIONSUFFIX"] = ".sln"
        env.MSVSProject(
            target=["#" + project_name + env["MSVSPROJECTSUFFIX"]],
            incs=env.vs_incs,
            srcs=env.vs_srcs,
            auto_build_solution=1,
            **module_configs,
        )
    else:
        print("Could not locate Visual Studio batch file to set up the build environment. Not generating VS project.")


def precious_program(env, program, sources, **args):
    program = env.ProgramOriginal(program, sources, **args)
    env.Precious(program)
    return program


def add_shared_library(env, name, sources, **args):
    library = env.SharedLibrary(name, sources, **args)
    env.NoCache(library)
    return library


def add_library(env, name, sources, **args):
    library = env.Library(name, sources, **args)
    env.NoCache(library)
    return library


def add_program(env, name, sources, **args):
    program = env.Program(name, sources, **args)
    env.NoCache(program)
    return program


def CommandNoCache(env, target, sources, command, **args):
    result = env.Command(target, sources, command, **args)
    env.NoCache(result)
    return result


def Run(env, function, short_message, subprocess=True):
    from SCons.Script import Action
    from platform_methods import run_in_subprocess

    output_print = short_message if not env["verbose"] else ""
    if not subprocess:
        return Action(function, output_print)
    else:
        return Action(run_in_subprocess(function), output_print)


def detect_darwin_sdk_path(platform, env):
    sdk_name = ""
    if platform == "macos":
        sdk_name = "macosx"
        var_name = "MACOS_SDK_PATH"
    elif platform == "ios":
        sdk_name = "iphoneos"
        var_name = "IOS_SDK_PATH"
    elif platform == "iossimulator":
        sdk_name = "iphonesimulator"
        var_name = "IOS_SDK_PATH"
    else:
        raise Exception("Invalid platform argument passed to detect_darwin_sdk_path")

    if not env[var_name]:
        try:
            sdk_path = subprocess.check_output(["xcrun", "--sdk", sdk_name, "--show-sdk-path"]).strip().decode("utf-8")
            if sdk_path:
                env[var_name] = sdk_path
        except (subprocess.CalledProcessError, OSError):
            print("Failed to find SDK path while running xcrun --sdk {} --show-sdk-path.".format(sdk_name))
            raise


def is_vanilla_clang(env):
    if not using_clang(env):
        return False
    try:
        version = subprocess.check_output([env.subst(env["CXX"]), "--version"]).strip().decode("utf-8")
    except (subprocess.CalledProcessError, OSError):
        print("Couldn't parse CXX environment variable to infer compiler version.")
        return False
    return not version.startswith("Apple")


def get_compiler_version(env):
    """
    Returns an array of version numbers as ints: [major, minor, patch].
    The return array should have at least two values (major, minor).
    """
    if not env.msvc:
        # Not using -dumpversion as some GCC distros only return major, and
        # Clang used to return hardcoded 4.2.1: # https://reviews.llvm.org/D56803
        try:
            version = subprocess.check_output([env.subst(env["CXX"]), "--version"]).strip().decode("utf-8")
        except (subprocess.CalledProcessError, OSError):
            print("Couldn't parse CXX environment variable to infer compiler version.")
            return None
    else:  # TODO: Implement for MSVC
        return None
    match = re.search(
        "(?:(?<=version )|(?<=\) )|(?<=^))"
        "(?P<major>\d+)"
        "(?:\.(?P<minor>\d*))?"
        "(?:\.(?P<patch>\d*))?"
        "(?:-(?P<metadata1>[0-9a-zA-Z-]*))?"
        "(?:\+(?P<metadata2>[0-9a-zA-Z-]*))?"
        "(?: (?P<date>[0-9]{8}|[0-9]{6})(?![0-9a-zA-Z]))?",
        version,
    )
    if match is not None:
        return match.groupdict()
    else:
        return None


def using_gcc(env):
    return "gcc" in os.path.basename(env["CC"])


def using_clang(env):
    return "clang" in os.path.basename(env["CC"])


def using_emcc(env):
    return "emcc" in os.path.basename(env["CC"])


def show_progress(env):
    import sys
    from SCons.Script import Progress, Command, AlwaysBuild

    screen = sys.stdout
    # Progress reporting is not available in non-TTY environments since it
    # messes with the output (for example, when writing to a file)
    show_progress = env["progress"] and sys.stdout.isatty()
    node_count = 0
    node_count_max = 0
    node_count_interval = 1
    node_count_fname = str(env.Dir("#")) + "/.scons_node_count"

    import time, math

    class cache_progress:
        # The default is 1 GB cache and 12 hours half life
        def __init__(self, path=None, limit=1073741824, half_life=43200):
            self.path = path
            self.limit = limit
            self.exponent_scale = math.log(2) / half_life
            if env["verbose"] and path != None:
                screen.write(
                    "Current cache limit is {} (used: {})\n".format(
                        self.convert_size(limit), self.convert_size(self.get_size(path))
                    )
                )
            self.delete(self.file_list())

        def __call__(self, node, *args, **kw):
            nonlocal node_count, node_count_max, node_count_interval, node_count_fname, show_progress
            if show_progress:
                # Print the progress percentage
                node_count += node_count_interval
                if node_count_max > 0 and node_count <= node_count_max:
                    screen.write("\r[%3d%%] " % (node_count * 100 / node_count_max))
                    screen.flush()
                elif node_count_max > 0 and node_count > node_count_max:
                    screen.write("\r[100%] ")
                    screen.flush()
                else:
                    screen.write("\r[Initial build] ")
                    screen.flush()

        def delete(self, files):
            if len(files) == 0:
                return
            if env["verbose"]:
                # Utter something
                screen.write("\rPurging %d %s from cache...\n" % (len(files), len(files) > 1 and "files" or "file"))
            [os.remove(f) for f in files]

        def file_list(self):
            if self.path is None:
                # Nothing to do
                return []
            # Gather a list of (filename, (size, atime)) within the
            # cache directory
            file_stat = [(x, os.stat(x)[6:8]) for x in glob.glob(os.path.join(self.path, "*", "*"))]
            if file_stat == []:
                # Nothing to do
                return []
            # Weight the cache files by size (assumed to be roughly
            # proportional to the recompilation time) times an exponential
            # decay since the ctime, and return a list with the entries
            # (filename, size, weight).
            current_time = time.time()
            file_stat = [(x[0], x[1][0], (current_time - x[1][1])) for x in file_stat]
            # Sort by the most recently accessed files (most sensible to keep) first
            file_stat.sort(key=lambda x: x[2])
            # Search for the first entry where the storage limit is
            # reached
            sum, mark = 0, None
            for i, x in enumerate(file_stat):
                sum += x[1]
                if sum > self.limit:
                    mark = i
                    break
            if mark is None:
                return []
            else:
                return [x[0] for x in file_stat[mark:]]

        def convert_size(self, size_bytes):
            if size_bytes == 0:
                return "0 bytes"
            size_name = ("bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
            i = int(math.floor(math.log(size_bytes, 1024)))
            p = math.pow(1024, i)
            s = round(size_bytes / p, 2)
            return "%s %s" % (int(s) if i == 0 else s, size_name[i])

        def get_size(self, start_path="."):
            total_size = 0
            for dirpath, dirnames, filenames in os.walk(start_path):
                for f in filenames:
                    fp = os.path.join(dirpath, f)
                    total_size += os.path.getsize(fp)
            return total_size

    def progress_finish(target, source, env):
        nonlocal node_count, progressor
        try:
            with open(node_count_fname, "w") as f:
                f.write("%d\n" % node_count)
            progressor.delete(progressor.file_list())
        except Exception:
            pass

    try:
        with open(node_count_fname) as f:
            node_count_max = int(f.readline())
    except Exception:
        pass

    cache_directory = os.environ.get("SCONS_CACHE")
    # Simple cache pruning, attached to SCons' progress callback. Trim the
    # cache directory to a size not larger than cache_limit.
    cache_limit = float(os.getenv("SCONS_CACHE_LIMIT", 1024)) * 1024 * 1024
    progressor = cache_progress(cache_directory, cache_limit)
    Progress(progressor, interval=node_count_interval)

    progress_finish_command = Command("progress_finish", [], progress_finish)
    AlwaysBuild(progress_finish_command)


def dump(env):
    # Dumps latest build information for debugging purposes and external tools.
    from json import dump

    def non_serializable(obj):
        return "<<non-serializable: %s>>" % (type(obj).__qualname__)

    with open(".scons_env.json", "w") as f:
        dump(env.Dictionary(), f, indent=4, default=non_serializable)