"""
数据结构定义模块

定义系统中使用的所有核心数据结构，包括用户信息、传感器配置、测试上下文、
判定结果、报告内容和系统状态等。
"""

from dataclasses import dataclass, field
from datetime import datetime
from enum import Enum
from typing import Optional


class UserRole(Enum):
    """用户角色枚举"""
    OPERATOR = "operator"      # 操作员
    TECHNICIAN = "technician"  # 工艺员
    ADMIN = "admin"            # 管理员


class TestResult(Enum):
    """测试结果枚举"""
    PASS = "PASS"
    FAIL = "FAIL"


class SystemMode(Enum):
    """系统模式枚举"""
    NORMAL = "normal"
    MAINTENANCE = "maintenance"
    NA = "na"  # 离线/不可用状态


@dataclass
class UserInfo:
    """
    用户信息对象

    Attributes:
        user_id: 用户唯一标识
        role: 用户角色
        domain_account: Windows域账号
        failed_attempts: 连续失败次数
        is_locked: 是否锁定
        session_token: 会话令牌
    """
    user_id: str
    role: UserRole
    domain_account: str
    failed_attempts: int = 0
    is_locked: bool = False
    session_token: Optional[str] = None


@dataclass
class SensorModelConfig:
    """
    传感器型号配置项（内存哈希表）

    Attributes:
        model_id: 型号唯一标识
        range_min: 量程下限 (MPa)
        range_max: 量程上限 (MPa)
        test_points: 测试点数
        cycles: 循环次数
        tolerance: 允差范围 (%FS)
    """
    model_id: str
    range_min: float
    range_max: float
    test_points: int
    cycles: int
    tolerance: float


@dataclass
class AcquisitionDataPoint:
    """
    单次采集数据点

    Attributes:
        pressure: 压力值 (MPa)
        output: 传感器输出值
        timestamp: 采集时间戳
    """
    pressure: float
    output: float
    timestamp: float


class RingBuffer:
    """
    环形缓冲区

    用于存储采集数据点，固定容量，自动覆盖最旧数据。
    """

    def __init__(self, capacity: int = 10000):
        """
        初始化环形缓冲区

        Args:
            capacity: 缓冲区容量，默认10000
        """
        self._capacity = capacity
        self._buffer: list = [None] * capacity
        self._head = 0
        self._tail = 0
        self._size = 0

    def append(self, item: AcquisitionDataPoint) -> None:
        """追加数据点"""
        self._buffer[self._head] = item
        self._head = (self._head + 1) % self._capacity
        if self._size < self._capacity:
            self._size += 1
        else:
            self._tail = (self._tail + 1) % self._capacity

    def get_all(self) -> list:
        """获取所有数据点列表"""
        result = []
        for i in range(self._size):
            idx = (self._tail + i) % self._capacity
            if self._buffer[idx] is not None:
                result.append(self._buffer[idx])
        return result

    def clear(self) -> None:
        """清空缓冲区"""
        self._buffer = [None] * self._capacity
        self._head = 0
        self._tail = 0
        self._size = 0

    @property
    def size(self) -> int:
        """当前数据点数"""
        return self._size

    @property
    def capacity(self) -> int:
        """缓冲区容量"""
        return self._capacity


@dataclass
class TestContext:
    """
    测试上下文对象

    Attributes:
        current_model: 当前测试的传感器型号
        pressure_sequence: 目标压力序列
        current_cycle: 当前循环次数
        current_point_index: 当前测试点索引
        acquisition_buffer: 采集数据环形缓冲区
        status_flags: 状态标志
    """
    current_model: str = ""
    pressure_sequence: list = field(default_factory=list)
    current_cycle: int = 0
    current_point_index: int = 0
    acquisition_buffer: RingBuffer = field(default_factory=lambda: RingBuffer(10000))
    status_flags: dict = field(default_factory=lambda: {
        "is_running": False,
        "is_paused": False,
        "alarm_active": False
    })

    def reset(self) -> None:
        """重置测试上下文"""
        self.current_model = ""
        self.pressure_sequence = []
        self.current_cycle = 0
        self.current_point_index = 0
        self.acquisition_buffer.clear()
        self.status_flags = {
            "is_running": False,
            "is_paused": False,
            "alarm_active": False
        }


@dataclass
class JudgmentResult:
    """
    判定结果对象

    Attributes:
        non_linearity: 非线性误差 (%)
        hysteresis: 迟滞误差 (%)
        repeatability: 重复性误差 (%)
        thresholds: 阈值配置
        result: PASS/FAIL
        details: 超标说明
    """
    non_linearity: float = 0.0
    hysteresis: float = 0.0
    repeatability: float = 0.0
    thresholds: dict = field(default_factory=dict)
    result: TestResult = TestResult.PASS
    details: str = ""


@dataclass
class ReportContent:
    """
    报告内容对象

    Attributes:
        test_id: 测试编号
        start_time: 开始时间
        end_time: 结束时间
        operator_id: 操作员ID
        model_id: 传感器型号
        result_summary: 结果汇总
        raw_data_table: 原始数据表
        chart_image: 图表图片 (bytes)
        sm3_hash: SM3哈希值
        digital_watermark: 数字水印
    """
    test_id: str = ""
    start_time: Optional[datetime] = None
    end_time: Optional[datetime] = None
    operator_id: str = ""
    model_id: str = ""
    result_summary: dict = field(default_factory=dict)
    raw_data_table: list = field(default_factory=list)
    chart_image: bytes = b""
    sm3_hash: str = ""
    digital_watermark: str = ""


@dataclass
class SystemStatus:
    """
    系统状态字典

    Attributes:
        system_mode: 系统模式
        instrument_status: 仪器状态
        network_enabled: 网络是否启用
        usb_whitelist_active: USB白名单是否激活
    """
    system_mode: SystemMode = SystemMode.NORMAL
    instrument_status: dict = field(default_factory=lambda: {
        "pressure_ctrl": True,
        "daq": True
    })
    network_enabled: bool = False
    usb_whitelist_active: bool = True