import os
import typing as T

from ..mesonlib import EnvironmentException, OptionKey, get_meson_command
from .compilers import Compiler

if T.TYPE_CHECKING:
    from ..environment import Environment
    from ..linkers import DynamicLinker
    from ..mesonlib import MachineChoice
    from ..envconfig import MachineInfo

nasm_optimization_args = {
    'plain': [],
    '0': ['-O0'],
    'g': ['-O0'],
    '1': ['-O1'],
    '2': ['-Ox'],
    '3': ['-Ox'],
    's': ['-Ox'],
}  # type: T.Dict[str, T.List[str]]


class NasmCompiler(Compiler):
    language = 'nasm'
    id = 'nasm'

    # https://learn.microsoft.com/en-us/cpp/c-runtime-library/crt-library-features
    crt_args: T.Dict[str, T.List[str]] = {
        'none': [],
        'md': ['/DEFAULTLIB:ucrt.lib', '/DEFAULTLIB:vcruntime.lib', '/DEFAULTLIB:msvcrt.lib'],
        'mdd': ['/DEFAULTLIB:ucrtd.lib', '/DEFAULTLIB:vcruntimed.lib', '/DEFAULTLIB:msvcrtd.lib'],
        'mt': ['/DEFAULTLIB:libucrt.lib', '/DEFAULTLIB:libvcruntime.lib', '/DEFAULTLIB:libcmt.lib'],
        'mtd': ['/DEFAULTLIB:libucrtd.lib', '/DEFAULTLIB:libvcruntimed.lib', '/DEFAULTLIB:libcmtd.lib'],
    }

    def __init__(self, ccache: T.List[str], exelist: T.List[str], version: str,
                 for_machine: 'MachineChoice', info: 'MachineInfo',
                 linker: T.Optional['DynamicLinker'] = None,
                 full_version: T.Optional[str] = None, is_cross: bool = False):
        super().__init__(ccache, exelist, version, for_machine, info, linker, full_version, is_cross)
        if 'link' in self.linker.id:
            self.base_options.add(OptionKey('b_vscrt'))

    def needs_static_linker(self) -> bool:
        return True

    def get_always_args(self) -> T.List[str]:
        cpu = '64' if self.info.is_64_bit else '32'
        if self.info.is_windows() or self.info.is_cygwin():
            plat = 'win'
            define = f'WIN{cpu}'
        elif self.info.is_darwin():
            plat = 'macho'
            define = 'MACHO'
        else:
            plat = 'elf'
            define = 'ELF'
        args = ['-f', f'{plat}{cpu}', f'-D{define}']
        if self.info.is_64_bit:
            args.append('-D__x86_64__')
        return args

    def get_werror_args(self) -> T.List[str]:
        return ['-Werror']

    def get_output_args(self, outputname: str) -> T.List[str]:
        return ['-o', outputname]

    def unix_args_to_native(self, args: T.List[str]) -> T.List[str]:
        outargs = []
        for arg in args:
            if arg == '-pthread':
                continue
            outargs.append(arg)
        return outargs

    def get_optimization_args(self, optimization_level: str) -> T.List[str]:
        return nasm_optimization_args[optimization_level]

    def get_debug_args(self, is_debug: bool) -> T.List[str]:
        if is_debug:
            if self.info.is_windows():
                return []
            return ['-g', '-F', 'dwarf']
        return []

    def get_depfile_suffix(self) -> str:
        return 'd'

    def get_dependency_gen_args(self, outtarget: str, outfile: str) -> T.List[str]:
        return ['-MD', outfile, '-MQ', outtarget]

    def sanity_check(self, work_dir: str, environment: 'Environment') -> None:
        if self.info.cpu_family not in {'x86', 'x86_64'}:
            raise EnvironmentException(f'ASM compiler {self.id!r} does not support {self.info.cpu_family} CPU family')

    def get_buildtype_args(self, buildtype: str) -> T.List[str]:
        # FIXME: Not implemented
        return []

    def get_pic_args(self) -> T.List[str]:
        return []

    def get_include_args(self, path: str, is_system: bool) -> T.List[str]:
        if not path:
            path = '.'
        return ['-I' + path]

    def compute_parameters_with_absolute_paths(self, parameter_list: T.List[str],
                                               build_dir: str) -> T.List[str]:
        for idx, i in enumerate(parameter_list):
            if i[:2] == '-I':
                parameter_list[idx] = i[:2] + os.path.normpath(os.path.join(build_dir, i[2:]))
        return parameter_list

    def get_crt_compile_args(self, crt_val: str, buildtype: str) -> T.List[str]:
        return []

    # Linking ASM-only objects into an executable or DLL
    # require this, otherwise it'll fail to find
    # _WinMain or _DllMainCRTStartup.
    def get_crt_link_args(self, crt_val: str, buildtype: str) -> T.List[str]:
        if not self.info.is_windows():
            return []
        if crt_val in self.crt_args:
            return self.crt_args[crt_val]
        assert crt_val in {'from_buildtype', 'static_from_buildtype'}
        dbg = 'mdd'
        rel = 'md'
        if crt_val == 'static_from_buildtype':
            dbg = 'mtd'
            rel = 'mt'
        # Match what build type flags used to do.
        if buildtype == 'plain':
            return []
        elif buildtype == 'debug':
            return self.crt_args[dbg]
        elif buildtype == 'debugoptimized':
            return self.crt_args[rel]
        elif buildtype == 'release':
            return self.crt_args[rel]
        elif buildtype == 'minsize':
            return self.crt_args[rel]
        else:
            assert buildtype == 'custom'
            raise EnvironmentException('Requested C runtime based on buildtype, but buildtype is "custom".')

class YasmCompiler(NasmCompiler):
    id = 'yasm'

    def get_optimization_args(self, optimization_level: str) -> T.List[str]:
        # Yasm is incompatible with Nasm optimization flags.
        return []

    def get_exelist(self, ccache: bool = True) -> T.List[str]:
        # Wrap yasm executable with an internal script that will write depfile.
        exelist = super().get_exelist(ccache)
        return get_meson_command() + ['--internal', 'yasm'] + exelist

    def get_debug_args(self, is_debug: bool) -> T.List[str]:
        if is_debug:
            if self.info.is_windows():
                return ['-g', 'null']
            return ['-g', 'dwarf2']
        return []

    def get_dependency_gen_args(self, outtarget: str, outfile: str) -> T.List[str]:
        return ['--depfile', outfile]

# https://learn.microsoft.com/en-us/cpp/assembler/masm/ml-and-ml64-command-line-reference
class MasmCompiler(Compiler):
    language = 'masm'
    id = 'ml'

    def get_compile_only_args(self) -> T.List[str]:
        return ['/c']

    def get_argument_syntax(self) -> str:
        return 'msvc'

    def needs_static_linker(self) -> bool:
        return True

    def get_always_args(self) -> T.List[str]:
        return ['/nologo']

    def get_werror_args(self) -> T.List[str]:
        return ['/WX']

    def get_output_args(self, outputname: str) -> T.List[str]:
        return ['/Fo', outputname]

    def get_optimization_args(self, optimization_level: str) -> T.List[str]:
        return []

    def get_debug_args(self, is_debug: bool) -> T.List[str]:
        if is_debug:
            return ['/Zi']
        return []

    def sanity_check(self, work_dir: str, environment: 'Environment') -> None:
        if self.info.cpu_family not in {'x86', 'x86_64'}:
            raise EnvironmentException(f'ASM compiler {self.id!r} does not support {self.info.cpu_family} CPU family')

    def get_buildtype_args(self, buildtype: str) -> T.List[str]:
        # FIXME: Not implemented
        return []

    def get_pic_args(self) -> T.List[str]:
        return []

    def get_include_args(self, path: str, is_system: bool) -> T.List[str]:
        if not path:
            path = '.'
        return ['-I' + path]

    def compute_parameters_with_absolute_paths(self, parameter_list: T.List[str],
                                               build_dir: str) -> T.List[str]:
        for idx, i in enumerate(parameter_list):
            if i[:2] == '-I' or i[:2] == '/I':
                parameter_list[idx] = i[:2] + os.path.normpath(os.path.join(build_dir, i[2:]))
        return parameter_list

    def get_crt_compile_args(self, crt_val: str, buildtype: str) -> T.List[str]:
        return []

    def depfile_for_object(self, objfile: str) -> T.Optional[str]:
        return None


# https://learn.microsoft.com/en-us/cpp/assembler/arm/arm-assembler-command-line-reference
class MasmARMCompiler(Compiler):
    language = 'masm'
    id = 'armasm'

    def needs_static_linker(self) -> bool:
        return True

    def get_always_args(self) -> T.List[str]:
        return ['-nologo']

    def get_werror_args(self) -> T.List[str]:
        return []

    def get_output_args(self, outputname: str) -> T.List[str]:
        return ['-o', outputname]

    def get_optimization_args(self, optimization_level: str) -> T.List[str]:
        return []

    def get_debug_args(self, is_debug: bool) -> T.List[str]:
        if is_debug:
            return ['-g']
        return []

    def sanity_check(self, work_dir: str, environment: 'Environment') -> None:
        if self.info.cpu_family not in {'arm', 'aarch64'}:
            raise EnvironmentException(f'ASM compiler {self.id!r} does not support {self.info.cpu_family} CPU family')

    def get_buildtype_args(self, buildtype: str) -> T.List[str]:
        # FIXME: Not implemented
        return []

    def get_pic_args(self) -> T.List[str]:
        return []

    def get_include_args(self, path: str, is_system: bool) -> T.List[str]:
        if not path:
            path = '.'
        return ['-i' + path]

    def compute_parameters_with_absolute_paths(self, parameter_list: T.List[str],
                                               build_dir: str) -> T.List[str]:
        for idx, i in enumerate(parameter_list):
            if i[:2] == '-I':
                parameter_list[idx] = i[:2] + os.path.normpath(os.path.join(build_dir, i[2:]))
        return parameter_list

    def get_crt_compile_args(self, crt_val: str, buildtype: str) -> T.List[str]:
        return []

    def depfile_for_object(self, objfile: str) -> T.Optional[str]:
        return None