"""
PregoPal - 体重检查插件
=======================
检查体重记录，对比 WS/T 801 标准。
"""

from plugins.base import LoopPlugin, PluginResult, LoopStage, LoopContext
from modules.nutrition_standards import WeightStandardParser


class WeightCheckPlugin(LoopPlugin):
    """检查体重记录，对比 WS/T 801 标准"""

    def stage(self) -> LoopStage:
        return LoopStage.SUMMARIZE

    def name(self) -> str:
        return "weight_check"

    async def run(self, ctx: LoopContext) -> PluginResult:
        # 从简报中获取体重数据
        weight_data = ctx.briefing.get("weight_data", {})

        if not weight_data or "bmi_before" not in weight_data:
            return PluginResult(
                success=True,
                data={"status": "no_data"},
                message="暂无体重数据，跳过检查"
            )

        result = WeightStandardParser.evaluate(
            bmi_before_pregnancy=weight_data.get("bmi_before", 22.0),
            current_week=weight_data.get("current_week", 20),
            total_gain=weight_data.get("total_gain", 5.0),
        )

        ctx.briefing["weight_evaluation"] = result
        ctx.weight_data = result

        return PluginResult(
            success=True,
            data=result,
            message=result["message"]
        )