#!/usr/bin/env python3

import errno
import os
import sys
import tempfile

from posix_parity import cleanup_paths
from posix_parity import compare_access
from posix_parity import fail
from posix_parity import join
from posix_parity import touch


def main():
    if len(sys.argv) != 2:
        print("usage: TEST_posix_access <mountpoint>", file=sys.stderr)
        return 1

    mount = sys.argv[1]

    with tempfile.TemporaryDirectory() as native:
        merge_file = join(mount, "posix-access/file")
        native_file = join(native, "posix-access/file")
        merge_notdir = join(mount, "posix-access/notdir")
        native_notdir = join(native, "posix-access/notdir")
        merge_missing = join(mount, "posix-access/missing")
        native_missing = join(native, "posix-access/missing")

        cleanup_paths([merge_file, merge_notdir])

        touch(merge_file, b"ok", 0o644)
        touch(native_file, b"ok", 0o644)
        touch(merge_notdir, b"x", 0o644)
        touch(native_notdir, b"x", 0o644)

        err = compare_access("F_OK existing", merge_file, native_file, os.F_OK)
        if err:
            return fail(err)

        err = compare_access(
            "F_OK missing", merge_missing, native_missing, os.F_OK, errno.ENOENT
        )
        if err:
            return fail(err)

        err = compare_access(
            "X_OK non-directory prefix",
            join(merge_notdir, "child"),
            join(native_notdir, "child"),
            os.X_OK,
            errno.ENOTDIR,
        )
        if err:
            return fail(err)

        os.chmod(merge_file, 0)
        os.chmod(native_file, 0)

        err = compare_access("R_OK unreadable", merge_file, native_file, os.R_OK)
        if err:
            return fail(err)

        return 0


if __name__ == "__main__":
    raise SystemExit(main())