#!/opt/cloudlinux/venv/bin/python3 -sbb
# -*- coding: utf-8 -*-
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENCE.TXT
#
from dataclasses import dataclass
from enum import Enum, auto


class MountType(Enum):
    """Types of mount operations."""

    # Bind mount source to target (source="tmpfs" for tmpfs mounts)
    BIND = auto()
    # @USER_MOUNTS directive
    USER_MOUNTS = auto()
    # Comment line for organization
    COMMENT = auto()


@dataclass
class MountEntry:
    """A single mount operation."""

    type: MountType
    source: str
    target: str = ""
    options: tuple[str, ...] = ()

    def render(self) -> str:
        """Render to jail.c mount syntax."""
        opts = ",".join(self.options) if self.options else ""

        if self.type == MountType.BIND:
            parts = [self.source, self.target]
            if opts:
                parts.append(opts)
            return " ".join(parts)

        elif self.type == MountType.USER_MOUNTS:
            return f"@USER_MOUNTS {self.source}"

        elif self.type == MountType.COMMENT:
            return f"## {self.source}"

        raise ValueError(f"Unknown mount type: {self.type}")