from __future__ import annotations

import asyncio
import threading
from dataclasses import dataclass, field
from datetime import datetime
from typing import List, Optional


@dataclass
class MeasureSnapshot:
    result: List[dict]
    video_left: str
    video_right: str
    updated_at: Optional[datetime] = None
    error: Optional[str] = None
    raw_prediction_path: Optional[str] = None
    pred: Optional[float] = None  # 最终预测的体重值
    star: bool = False  # DB 是唯一真相源：segment/batch 恒 False；final 行按参与聚合段的 dgcnn_summary 规则判定
    #: 与 FishMeasure ``test_dgcnn_weight_estimator.py`` 终端输出一致的体重推算过程文本
    calculation_log: Optional[str] = None


@dataclass
class HealthSnapshot:
    behavior_result: str
    health_result: str
    updated_at: Optional[datetime] = None
    error: Optional[str] = None
    raw_class_en: str = ""
    video_path: str = ""


@dataclass
class AppState:
    measure_lock: asyncio.Lock = field(default_factory=asyncio.Lock)
    #: 与 ``run_full_measure`` 子进程串行化（跨 ``measure_watch`` / ingest 线程）
    measure_thread_lock: threading.Lock = field(default_factory=threading.Lock)
    action_lock: asyncio.Lock = field(default_factory=asyncio.Lock)

    # job status for optional polling（业务结果见 SQLite）
    measure_status: str = "idle"
    action_status: str = "idle"

    #: ZED 分段录制线程与协作停止事件（由 ``zed_recording_control`` 管理）
    zed_recording_lock: threading.Lock = field(default_factory=threading.Lock)
    zed_recording_stop_event: Optional[threading.Event] = None
    zed_recording_thread: Optional[threading.Thread] = None
    #: 当前会话（与 ``zed_recording_sessions`` 表对应）
    zed_recording_session_row_id: Optional[int] = None
    zed_recording_fish_id: Optional[int] = None


app_state = AppState()