import os
import re
from SCons.Script import *

_DEPENDENCIES = {
    'zlib': {}
}

def _git_cook(env: Environment, repo: dict) -> dict:
    checkout_root = repo['checkout_root']

    magic_source_files = [
        os.path.join(checkout_root, 'src/buffer.c'),
        os.path.join(checkout_root, 'src/magic.c'),
        os.path.join(checkout_root, 'src/apprentice.c'),
        os.path.join(checkout_root, 'src/softmagic.c'),
        os.path.join(checkout_root, 'src/ascmagic.c'),
        os.path.join(checkout_root, 'src/encoding.c'),
        os.path.join(checkout_root, 'src/compress.c'),
        os.path.join(checkout_root, 'src/is_csv.c'),
        os.path.join(checkout_root, 'src/is_json.c'),
        os.path.join(checkout_root, 'src/is_simh.c'),
        os.path.join(checkout_root, 'src/is_tar.c'),
        os.path.join(checkout_root, 'src/readelf.c'),
        os.path.join(checkout_root, 'src/print.c'),
        os.path.join(checkout_root, 'src/fsmagic.c'),
        os.path.join(checkout_root, 'src/funcs.c'),
        os.path.join(checkout_root, 'src/apptype.c'),
        os.path.join(checkout_root, 'src/der.c'),
        os.path.join(checkout_root, 'src/cdf.c'),
        os.path.join(checkout_root, 'src/cdf_time.c'),
        os.path.join(checkout_root, 'src/readcdf.c'),
        os.path.join(checkout_root, 'src/fmtcheck.c')
    ]

    version_dict = {'X.YY': '5.46'}
    env.Substfile(os.path.join(checkout_root, 'src/magic.h.in'), SUBST_DICT=version_dict)

    additional_ccflags = []
    if env['COMPILER_FAMILY'] == 'gcc':
        additional_ccflags.extend(['-Wno-unused-parameter', '-Wno-unused-const-variable'])

    lib_magic = env.StaticLibrary(
        CPPDEFINES = list(env['CPPDEFINES']) + ['HAVE_BYTESWAP_H', 'HAVE_BZLIB_H', 'HAVE_ERR_H',
                                                'HAVE_FREELOCALE', 'HAVE_GETOPT_H', 'HAVE_INTTYPES_H', 'HAVE_LIBSECCOMP',
                                                'HAVE_LRZIP_H', 'HAVE_LZLIB_H', 'HAVE_LZMA_H', 'HAVE_MBRTOWC',
                                                'HAVE_MEMMEM', 'HAVE_MMAP', 'HAVE_NEWLOCALE',
                                                'HAVE_POSIX_SPAWNP', 'HAVE_SPAWN_H', 'HAVE_STDINT_H', 'HAVE_STRNDUP',
                                                'HAVE_STRTOF', 'HAVE_STRUCT_OPTION', 'HAVE_STRUCT_STAT_ST_RDEV',
                                                'HAVE_STRUCT_TM_TM_GMTOFF', 'HAVE_STRUCT_TM_TM_ZONE',
                                                'HAVE_SYS_IOCTL_H', 'HAVE_SYS_MMAN_H', 'HAVE_SYS_SYSMACROS_H',
                                                'HAVE_SYS_TIME_H', 'HAVE_SYS_UTIME_H', 'HAVE_SYS_WAIT_H',
                                                'HAVE_UNISTD_H', 'HAVE_USELOCALE', 'HAVE_UTIME', 'HAVE_UTIMES',
                                                'HAVE_UTIME_H', 'HAVE_WCHAR_H', 'HAVE_WCTYPE_H', 'HAVE_WCWIDTH',
                                                'HAVE_ZLIB_H', 'HAVE_ZSTD_H', 'VERSION=\\"5.46\\"'],


    CCFLAGS = list(env['CCFLAGS']) + additional_ccflags,
        target = env['LIB_DIR'] + '/magic',
        source = magic_source_files,
        dependencies = _DEPENDENCIES
    )

    return {
        'CPPPATH': [os.path.join(checkout_root, 'src')],
        'LIBS': [lib_magic]
    }


env.GitRecipe(
    globals = globals(),
    repo_name = 'libmagic',
    repo_url = 'https://github.com/file/file.git',
    tag_pattern = re.compile(r'^FILE([0-9]+)_([0-9]+)$'),
    tag_fn = lambda version: f'FILE{version[0]}_{version[1]}',
    cook_fn = _git_cook,
    dependencies = _DEPENDENCIES
)