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# Copyright The SCons Foundation
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"""Scanner for the Digital Mars "D" programming language.

Coded by Andy Friesen, 17 Nov 2003
"""

import SCons.Node.FS
from . import Classic

def DScanner():
    """Return a prototype Scanner instance for scanning D source files"""
    ds = D()
    return ds

class D(Classic):
    def __init__(self) -> None:
        super().__init__(
            name="DScanner",
            suffixes='$DSUFFIXES',
            path_variable='DPATH',
            regex=r'(?:import\s+)([\w\s=,.]+)(?:\s*:[\s\w,=]+)?(?:;)',
        )

    @staticmethod
    def find_include(include, source_dir, path):
        # translate dots (package separators) to slashes
        inc = include.replace('.', '/')

        # According to https://dlang.org/dmd-linux.html#interface-files
        # Prefer .di files over .d files when processing includes(imports)
        i = SCons.Node.FS.find_file(inc + '.di', (source_dir,) + path)
        if i is None:
            i = SCons.Node.FS.find_file(inc + '.d', (source_dir,) + path)
        return i, include

    def find_include_names(self, node):
        includes = []
        for iii in self.cre.findall(node.get_text_contents()):
            for jjj in iii.split(','):
                kkk = jjj.split('=')[-1]
                includes.append(kkk.strip())
        return includes

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