from datetime import datetime, timezone

from sqlalchemy import (
    BigInteger,
    Boolean,
    DateTime,
    Float,
    ForeignKey,
    Index,
    Integer,
    String,
    Text,
)
from sqlalchemy.dialects.sqlite import JSON
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


def _utcnow() -> datetime:
    return datetime.now(timezone.utc)


class Device(Base):
    """Registered Bluetooth badge devices."""

    __tablename__ = "devices"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    imei: Mapped[str] = mapped_column(String(20), unique=True, index=True, nullable=False)
    device_type: Mapped[str] = mapped_column(String(10), nullable=False)
    name: Mapped[str | None] = mapped_column(String(100), nullable=True)
    status: Mapped[str] = mapped_column(String(20), default="offline", nullable=False)
    battery_level: Mapped[int | None] = mapped_column(Integer, nullable=True)
    gsm_signal: Mapped[int | None] = mapped_column(Integer, nullable=True)
    last_heartbeat: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    last_login: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    iccid: Mapped[str | None] = mapped_column(String(30), nullable=True)
    imsi: Mapped[str | None] = mapped_column(String(20), nullable=True)
    timezone: Mapped[str] = mapped_column(String(30), default="+8", nullable=False)
    language: Mapped[str] = mapped_column(String(10), default="cn", nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)
    updated_at: Mapped[datetime | None] = mapped_column(
        DateTime, default=_utcnow, onupdate=_utcnow, nullable=True
    )

    # Relationships
    locations: Mapped[list["LocationRecord"]] = relationship(
        back_populates="device", cascade="all, delete-orphan", lazy="noload"
    )
    alarms: Mapped[list["AlarmRecord"]] = relationship(
        back_populates="device", cascade="all, delete-orphan", lazy="noload"
    )
    heartbeats: Mapped[list["HeartbeatRecord"]] = relationship(
        back_populates="device", cascade="all, delete-orphan", lazy="noload"
    )
    attendance_records: Mapped[list["AttendanceRecord"]] = relationship(
        back_populates="device", cascade="all, delete-orphan", lazy="noload"
    )
    bluetooth_records: Mapped[list["BluetoothRecord"]] = relationship(
        back_populates="device", cascade="all, delete-orphan", lazy="noload"
    )
    command_logs: Mapped[list["CommandLog"]] = relationship(
        back_populates="device", cascade="all, delete-orphan", lazy="noload"
    )

    def __repr__(self) -> str:
        return f"<Device(id={self.id}, imei={self.imei}, status={self.status})>"


class LocationRecord(Base):
    """GPS / LBS / WIFI location records."""

    __tablename__ = "location_records"
    __table_args__ = (
        Index("ix_location_device_time", "device_id", "recorded_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    device_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("devices.id", ondelete="CASCADE"), index=True, nullable=False
    )
    location_type: Mapped[str] = mapped_column(
        String(10), nullable=False
    )  # gps, lbs, wifi, gps_4g, lbs_4g, wifi_4g
    latitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    longitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    speed: Mapped[float | None] = mapped_column(Float, nullable=True)
    course: Mapped[float | None] = mapped_column(Float, nullable=True)
    gps_satellites: Mapped[int | None] = mapped_column(Integer, nullable=True)
    gps_positioned: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    mcc: Mapped[int | None] = mapped_column(Integer, nullable=True)
    mnc: Mapped[int | None] = mapped_column(Integer, nullable=True)
    lac: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    cell_id: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    rssi: Mapped[int | None] = mapped_column(Integer, nullable=True)
    neighbor_cells: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    wifi_data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    report_mode: Mapped[int | None] = mapped_column(Integer, nullable=True)
    is_realtime: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    mileage: Mapped[float | None] = mapped_column(Float, nullable=True)
    address: Mapped[str | None] = mapped_column(Text, nullable=True)
    raw_data: Mapped[str | None] = mapped_column(Text, nullable=True)
    recorded_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)

    device: Mapped["Device"] = relationship(back_populates="locations")

    def __repr__(self) -> str:
        return (
            f"<LocationRecord(id={self.id}, device_id={self.device_id}, "
            f"type={self.location_type})>"
        )


class AlarmRecord(Base):
    """Alarm events raised by devices."""

    __tablename__ = "alarm_records"
    __table_args__ = (
        Index("ix_alarm_device_time", "device_id", "recorded_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    device_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("devices.id", ondelete="CASCADE"), index=True, nullable=False
    )
    alarm_type: Mapped[str] = mapped_column(
        String(30), nullable=False
    )  # sos, low_battery, power_on, power_off, enter_fence, exit_fence, ...
    alarm_source: Mapped[str | None] = mapped_column(
        String(20), nullable=True
    )  # single_fence, multi_fence, lbs, wifi
    protocol_number: Mapped[int] = mapped_column(Integer, nullable=False)
    latitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    longitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    speed: Mapped[float | None] = mapped_column(Float, nullable=True)
    course: Mapped[float | None] = mapped_column(Float, nullable=True)
    mcc: Mapped[int | None] = mapped_column(Integer, nullable=True)
    mnc: Mapped[int | None] = mapped_column(Integer, nullable=True)
    lac: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    cell_id: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    battery_level: Mapped[int | None] = mapped_column(Integer, nullable=True)
    gsm_signal: Mapped[int | None] = mapped_column(Integer, nullable=True)
    fence_data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    wifi_data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    address: Mapped[str | None] = mapped_column(Text, nullable=True)
    acknowledged: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    recorded_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)

    device: Mapped["Device"] = relationship(back_populates="alarms")

    def __repr__(self) -> str:
        return (
            f"<AlarmRecord(id={self.id}, device_id={self.device_id}, "
            f"type={self.alarm_type})>"
        )


class HeartbeatRecord(Base):
    """Heartbeat history from devices."""

    __tablename__ = "heartbeat_records"
    __table_args__ = (
        Index("ix_heartbeat_device_time", "device_id", "created_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    device_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("devices.id", ondelete="CASCADE"), index=True, nullable=False
    )
    protocol_number: Mapped[int] = mapped_column(Integer, nullable=False)  # 0x13 or 0x36
    terminal_info: Mapped[int] = mapped_column(Integer, nullable=False)
    battery_level: Mapped[int] = mapped_column(Integer, nullable=False)
    gsm_signal: Mapped[int] = mapped_column(Integer, nullable=False)
    extension_data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)

    device: Mapped["Device"] = relationship(back_populates="heartbeats")

    def __repr__(self) -> str:
        return f"<HeartbeatRecord(id={self.id}, device_id={self.device_id})>"


class AttendanceRecord(Base):
    """Attendance punch records from badges."""

    __tablename__ = "attendance_records"
    __table_args__ = (
        Index("ix_attendance_device_time", "device_id", "recorded_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    device_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("devices.id", ondelete="CASCADE"), index=True, nullable=False
    )
    attendance_type: Mapped[str] = mapped_column(
        String(20), nullable=False
    )  # clock_in, clock_out
    protocol_number: Mapped[int] = mapped_column(Integer, nullable=False)
    gps_positioned: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    latitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    longitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    speed: Mapped[float | None] = mapped_column(Float, nullable=True)
    course: Mapped[float | None] = mapped_column(Float, nullable=True)
    gps_satellites: Mapped[int | None] = mapped_column(Integer, nullable=True)
    battery_level: Mapped[int | None] = mapped_column(Integer, nullable=True)
    gsm_signal: Mapped[int | None] = mapped_column(Integer, nullable=True)
    mcc: Mapped[int | None] = mapped_column(Integer, nullable=True)
    mnc: Mapped[int | None] = mapped_column(Integer, nullable=True)
    lac: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    cell_id: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    wifi_data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    lbs_data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    address: Mapped[str | None] = mapped_column(Text, nullable=True)
    recorded_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)

    device: Mapped["Device"] = relationship(back_populates="attendance_records")

    def __repr__(self) -> str:
        return (
            f"<AttendanceRecord(id={self.id}, device_id={self.device_id}, "
            f"type={self.attendance_type})>"
        )


class BluetoothRecord(Base):
    """Bluetooth punch card and location records."""

    __tablename__ = "bluetooth_records"
    __table_args__ = (
        Index("ix_bluetooth_device_time", "device_id", "recorded_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    device_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("devices.id", ondelete="CASCADE"), index=True, nullable=False
    )
    record_type: Mapped[str] = mapped_column(
        String(20), nullable=False
    )  # punch, location
    protocol_number: Mapped[int] = mapped_column(Integer, nullable=False)
    beacon_mac: Mapped[str | None] = mapped_column(String(20), nullable=True)
    beacon_uuid: Mapped[str | None] = mapped_column(String(36), nullable=True)
    beacon_major: Mapped[int | None] = mapped_column(Integer, nullable=True)
    beacon_minor: Mapped[int | None] = mapped_column(Integer, nullable=True)
    rssi: Mapped[int | None] = mapped_column(Integer, nullable=True)
    beacon_battery: Mapped[float | None] = mapped_column(Float, nullable=True)
    beacon_battery_unit: Mapped[str | None] = mapped_column(String(10), nullable=True)
    attendance_type: Mapped[str | None] = mapped_column(String(20), nullable=True)
    bluetooth_data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    latitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    longitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    recorded_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)

    device: Mapped["Device"] = relationship(back_populates="bluetooth_records")

    def __repr__(self) -> str:
        return (
            f"<BluetoothRecord(id={self.id}, device_id={self.device_id}, "
            f"type={self.record_type})>"
        )


class BeaconConfig(Base):
    """Registered Bluetooth beacon configuration for indoor positioning."""

    __tablename__ = "beacon_configs"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    beacon_mac: Mapped[str] = mapped_column(String(20), unique=True, index=True, nullable=False)
    beacon_uuid: Mapped[str | None] = mapped_column(String(36), nullable=True)
    beacon_major: Mapped[int | None] = mapped_column(Integer, nullable=True)
    beacon_minor: Mapped[int | None] = mapped_column(Integer, nullable=True)
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    floor: Mapped[str | None] = mapped_column(String(20), nullable=True)
    area: Mapped[str | None] = mapped_column(String(100), nullable=True)
    latitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    longitude: Mapped[float | None] = mapped_column(Float, nullable=True)
    address: Mapped[str | None] = mapped_column(Text, nullable=True)
    status: Mapped[str] = mapped_column(String(20), default="active", nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)
    updated_at: Mapped[datetime | None] = mapped_column(
        DateTime, default=_utcnow, onupdate=_utcnow, nullable=True
    )

    def __repr__(self) -> str:
        return f"<BeaconConfig(id={self.id}, mac={self.beacon_mac}, name={self.name})>"


class CommandLog(Base):
    """Log of commands sent to devices."""

    __tablename__ = "command_logs"
    __table_args__ = (
        Index("ix_command_device_status", "device_id", "status"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    device_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("devices.id", ondelete="CASCADE"), index=True, nullable=False
    )
    command_type: Mapped[str] = mapped_column(String(30), nullable=False)
    command_content: Mapped[str] = mapped_column(Text, nullable=False)
    server_flag: Mapped[str] = mapped_column(String(20), nullable=False)
    response_content: Mapped[str | None] = mapped_column(Text, nullable=True)
    status: Mapped[str] = mapped_column(
        String(20), default="pending", nullable=False
    )  # pending, sent, success, failed
    sent_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    response_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)

    device: Mapped["Device"] = relationship(back_populates="command_logs")

    def __repr__(self) -> str:
        return (
            f"<CommandLog(id={self.id}, device_id={self.device_id}, "
            f"type={self.command_type}, status={self.status})>"
        )


class ApiKey(Base):
    """API keys for external system authentication."""

    __tablename__ = "api_keys"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    key_hash: Mapped[str] = mapped_column(String(64), unique=True, index=True, nullable=False)
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    permissions: Mapped[str] = mapped_column(
        String(20), default="read", nullable=False
    )  # read, write, admin
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    last_used_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow, nullable=False)

    def __repr__(self) -> str:
        return f"<ApiKey(id={self.id}, name={self.name}, permissions={self.permissions})>"