#!/usr/bin/env python3

import subprocess
import os
import sys

target = "all"  # all, kernel, userland
target_arch = "x86_64"


class ClassTidyLauncher():

    backend_flags = {
        "x86": ["-c", "-m32",
                "-D_LIBCXX_BUILD_XOS_EXTENSIONS"],
        "arm32": [
            "-fno-builtin",
            "-march=armv7-a",
            "-mfpu=neon-vfpv4",
            "-mfloat-abi=soft",
            "-D_LIBCXX_BUILD_XOS_EXTENSIONS",
        ],
        "arm64": [
            "-fno-builtin",
            "-mcpu=cortex-a53+nofp+nosimd+nocrypto+nocrc",
            "-D_LIBCXX_BUILD_XOS_EXTENSIONS",
        ],
        "x86_64": [
            "-c",
            "-D_LIBCXX_BUILD_XOS_EXTENSIONS",
        ]
    }

    def __init__(self, dir, includes):
        self.path_dir = dir
        self.include = includes
        self.front_flags = ["--use-color", "--fix"]
        self.back_flags = self.backend_flags[target_arch]

    def run_clang_tidy(self, ff, files, bf):
        cmd = ["clang-tidy"]
        cmd.extend(ff)
        cmd.extend(files)
        cmd.extend(["--"])
        cmd.extend(bf)
        result = subprocess.run(cmd, stdout=subprocess.PIPE)
        return result.stdout

    def process_includes(self):
        for i in self.include:
            self.back_flags.append("-I")
            self.back_flags.append(i)

    def get_files(self):
        self.c_files = []
        self.cpp_files = []

        platforms = ['x86', 'i386', 'x86_64', 'arm',
                     'arm32', 'arm64', 'aarch32', 'aarch64']
        bits = ['bits32', 'bits64']

        platform_to_bits = {
            "x86": "bits32",
            "x86_64": "bits64",
            "arm32": "bits32",
            "arm64": "bits64",
        }

        allowed_paths = {
            "x86": ["x86", "i386"],
            "x86_64": ["x86", "x86_64"],
            "arm32": ["aarch32", "arm32", "arm"],
            "arm64": ["aarch64", "arm64", "arm"],
        }

        ignore_platforms = []
        ignore_bits = []

        allowed_paths_for_target = allowed_paths.get(target_arch, None)
        if allowed_paths_for_target is None:
            print("Unknown platform {0}".format(target_arch))
            exit(1)

        for platform in platforms:
            if not (platform in allowed_paths_for_target):
                ignore_platforms.append(platform)

        for bit in bits:
            if platform_to_bits[target_arch] != bit:
                ignore_bits.append(bit)

        def is_file_type(name, ending):
            if len(name) <= len(ending):
                return False
            return (name[-len(ending)-1::] == '.'+ending)

        def is_file_blocked(name):
            for platform in ignore_platforms:
                if (name.find(platform) != -1):
                    return True
            for bit in ignore_bits:
                if (name.find(bit) != -1):
                    return True
            return False

        for path, subdirs, files in os.walk(self.path_dir):
            for name in files:
                # It runs from out dir, at least it should
                file = path + "/" + name
                if is_file_blocked(file):
                    continue
                if is_file_type(file, 'c'):
                    self.c_files.append(file)
                if is_file_type(file, 'cpp'):
                    self.cpp_files.append(file)

    def process(self):
        self.process_includes()
        self.get_files()
        self.c_back_flags = self.back_flags
        self.c_back_flags += ["-std=gnu98"]
        ret = ""
        if len(self.c_files) > 0:
            ret += self.run_clang_tidy(self.front_flags,
                                       self.c_files, self.c_back_flags).decode("ascii")
        self.cpp_back_flags = self.back_flags
        self.cpp_back_flags += ["-std=c++2a"]
        if len(self.cpp_files) > 0:
            ret += self.run_clang_tidy(self.front_flags,
                                       self.cpp_files, self.cpp_back_flags).decode("ascii")
        return ret


kernel_includes = ["kernel/include"]
app_includes = ["libs/libc/include", "libs/libcxx/include", "libs/libfoundation/include",
                "libs/libipc/include", "libs/libg/include", "libs/libui/include"]

if target == "all" or target == "kernel":
    print(ClassTidyLauncher("kernel/kernel", kernel_includes).process())

if target == "all" or target == "userland":
    print(ClassTidyLauncher("servers/", app_includes).process())
    print(ClassTidyLauncher("libs/", app_includes).process())