#!/usr/bin/env python3

import os
import stat
import sys
import tempfile

from posix_parity import cleanup_paths
from posix_parity import compare_calls
from posix_parity import fail
from posix_parity import join


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

    mount = sys.argv[1]

    with tempfile.TemporaryDirectory() as native:
        os.makedirs(join(mount, "posix-create"), exist_ok=True)
        os.makedirs(join(native, "posix-create"), exist_ok=True)

        merge_file = join(mount, "posix-create/file")
        native_file = join(native, "posix-create/file")
        merge_exist = join(mount, "posix-create/exist")
        native_exist = join(native, "posix-create/exist")
        merge_notdir = join(mount, "posix-create/notdir")
        native_notdir = join(native, "posix-create/notdir")

        cleanup_paths([merge_file, merge_exist, merge_notdir])

        err = compare_calls(
            "create success",
            lambda: os.open(merge_file, os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o640),
            lambda: os.open(native_file, os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o640),
            close_fds=True,
        )
        if err:
            return fail(err)

        with open(merge_exist, "wb"):
            pass
        with open(native_exist, "wb"):
            pass

        err = compare_calls(
            "create EEXIST",
            lambda: os.open(merge_exist, os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o640),
            lambda: os.open(native_exist, os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o640),
        )
        if err:
            return fail(err)

        with open(merge_notdir, "wb"):
            pass
        with open(native_notdir, "wb"):
            pass

        err = compare_calls(
            "create ENOTDIR",
            lambda: os.open(join(merge_notdir, "child"), os.O_CREAT | os.O_WRONLY, 0o640),
            lambda: os.open(join(native_notdir, "child"), os.O_CREAT | os.O_WRONLY, 0o640),
        )
        if err:
            return fail(err)

        merge_node = join(mount, "posix-create/mknod")
        native_node = join(native, "posix-create/mknod")
        cleanup_paths([merge_node])

        err = compare_calls(
            "mknod regular",
            lambda: os.mknod(merge_node, stat.S_IFREG | 0o600, 0),
            lambda: os.mknod(native_node, stat.S_IFREG | 0o600, 0),
        )
        if err:
            return fail(err)

        err = compare_calls(
            "mknod EEXIST",
            lambda: os.mknod(merge_node, stat.S_IFREG | 0o600, 0),
            lambda: os.mknod(native_node, stat.S_IFREG | 0o600, 0),
        )
        if err:
            return fail(err)

        return 0


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