#!/usr/bin/env python3

import os
import stat
import sys
import tempfile

from posix_parity import cleanup_dir
from posix_parity import cleanup_paths
from posix_parity import compare_calls
from posix_parity import fail
from posix_parity import join
from posix_parity import temp_dir


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:
        merge_base = temp_dir(mount)
        try:
            native_base = join(native, os.path.basename(merge_base))
            os.makedirs(native_base, exist_ok=True)

            merge_file = join(merge_base, "file")
            native_file = join(native_base, "file")
            merge_exist = join(merge_base, "exist")
            native_exist = join(native_base, "exist")
            merge_notdir = join(merge_base, "notdir")
            native_notdir = join(native_base, "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),
                close_fds=True,
            )
            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(merge_base, "mknod")
            native_node = join(native_base, "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
        finally:
            cleanup_dir(merge_base)


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