"""
PregoPal - 插件基类
===================
定义 LoopPlugin 基类、PluginRegistry、LoopStage、LoopContext。
"""

from abc import ABC, abstractmethod
from dataclasses import dataclass, field
from enum import Enum
from typing import List


class LoopStage(Enum):
    """插件可注册的阶段"""
    FAMILY_QUIZ = "family_quiz"
    SUMMARIZE = "summarize"
    ANALYZE = "analyze"
    BRIEF = "brief"
    THREE_DAY = "three_day"
    CONSOLIDATE = "consolidate"


@dataclass
class LoopContext:
    """插件上下文：共享数据容器"""
    briefing: dict = field(default_factory=dict)
    weight_data: dict = field(default_factory=dict)
    diet_records: list = field(default_factory=list)
    family_recipes: list = field(default_factory=list)
    family_memory: dict = field(default_factory=dict)
    analysis_results: dict = field(default_factory=dict)
    errors: list = field(default_factory=list)


@dataclass
class PluginResult:
    """插件执行结果"""
    success: bool = True
    data: dict = field(default_factory=dict)
    message: str = ""


class LoopPlugin(ABC):
    """Loop 扩展插件基类 — 所有插件继承此类"""

    @abstractmethod
    def stage(self) -> LoopStage:
        """此插件注册到哪个阶段"""

    @abstractmethod
    def name(self) -> str:
        """插件唯一名称"""

    @abstractmethod
    async def run(self, ctx: LoopContext) -> PluginResult:
        """执行插件逻辑"""


class PluginRegistry:
    """插件注册中心"""

    def __init__(self):
        self._plugins: List[LoopPlugin] = []

    def register(self, plugin: LoopPlugin):
        """注册一个插件"""
        self._plugins.append(plugin)

    def get_plugins(self, stage: LoopStage) -> List[LoopPlugin]:
        """获取指定阶段的所有插件"""
        return [p for p in self._plugins if p.stage() == stage]

    def get_all(self) -> List[LoopPlugin]:
        """获取所有插件"""
        return self._plugins.copy()

    def unregister(self, name: str):
        """根据名称注销插件"""
        self._plugins = [p for p in self._plugins if p.name() != name]