from __future__ import annotations

from datetime import datetime

from sqlalchemy import Boolean, DateTime, Float, ForeignKey, Integer, JSON, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.db.base import Base, TimestampMixin, UUIDPrimaryKeyMixin


class DataSource(UUIDPrimaryKeyMixin, TimestampMixin, Base):
    __tablename__ = "data_sources"

    mine_id: Mapped[str | None] = mapped_column(
        String(32), ForeignKey("mines.id", ondelete="CASCADE"), nullable=True, index=True
    )
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    name: Mapped[str] = mapped_column(String(128))
    source_type: Mapped[str] = mapped_column(String(32), index=True)
    protocol: Mapped[str] = mapped_column(String(64), default="REST")
    endpoint: Mapped[str] = mapped_column(String(512), default="")
    status: Mapped[str] = mapped_column(String(32), default="offline", index=True)
    last_sync_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    point_count: Mapped[int] = mapped_column(Integer, default=0)
    latency_ms: Mapped[int | None] = mapped_column(Integer, nullable=True)
    config: Mapped[dict] = mapped_column(JSON, default=dict)


class Sensor(UUIDPrimaryKeyMixin, TimestampMixin, Base):
    __tablename__ = "sensors"

    mine_id: Mapped[str] = mapped_column(
        String(32), ForeignKey("mines.id", ondelete="CASCADE"), index=True
    )
    area_id: Mapped[str | None] = mapped_column(
        String(32), ForeignKey("mine_areas.id", ondelete="SET NULL"), nullable=True
    )
    data_source_id: Mapped[str | None] = mapped_column(
        String(32), ForeignKey("data_sources.id", ondelete="SET NULL"), nullable=True, index=True
    )
    code: Mapped[str] = mapped_column(String(64), index=True)
    name: Mapped[str] = mapped_column(String(128))
    sensor_type: Mapped[str] = mapped_column(String(32), index=True)
    unit: Mapped[str] = mapped_column(String(32), default="")
    location: Mapped[str] = mapped_column(String(255), default="")
    status: Mapped[str] = mapped_column(String(32), default="online", index=True)
    warning_threshold: Mapped[float | None] = mapped_column(Float, nullable=True)
    alarm_threshold: Mapped[float | None] = mapped_column(Float, nullable=True)
    upper_bound: Mapped[float | None] = mapped_column(Float, nullable=True)
    lower_bound: Mapped[float | None] = mapped_column(Float, nullable=True)
    last_value: Mapped[float | None] = mapped_column(Float, nullable=True)
    last_seen_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    properties: Mapped[dict] = mapped_column(JSON, default=dict)


class SensorReading(UUIDPrimaryKeyMixin, Base):
    __tablename__ = "sensor_readings"

    sensor_id: Mapped[str] = mapped_column(
        String(32), ForeignKey("sensors.id", ondelete="CASCADE"), index=True
    )
    measured_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), index=True)
    value: Mapped[float] = mapped_column(Float)
    quality: Mapped[int] = mapped_column(Integer, default=100)
    is_alarm: Mapped[bool] = mapped_column(Boolean, default=False, index=True)
    source: Mapped[str] = mapped_column(String(64), default="")
    meta: Mapped[dict] = mapped_column(JSON, default=dict)


class VentilationFacility(UUIDPrimaryKeyMixin, TimestampMixin, Base):
    __tablename__ = "ventilation_facilities"

    mine_id: Mapped[str] = mapped_column(
        String(32), ForeignKey("mines.id", ondelete="CASCADE"), index=True
    )
    area_id: Mapped[str | None] = mapped_column(
        String(32), ForeignKey("mine_areas.id", ondelete="SET NULL"), nullable=True
    )
    roadway_id: Mapped[str | None] = mapped_column(
        String(32), ForeignKey("roadways.id", ondelete="SET NULL"), nullable=True
    )
    code: Mapped[str] = mapped_column(String(64), index=True)
    name: Mapped[str] = mapped_column(String(128))
    facility_type: Mapped[str] = mapped_column(String(32), index=True)
    location: Mapped[str] = mapped_column(String(255), default="")
    status: Mapped[str] = mapped_column(String(32), default="normal", index=True)
    open_state: Mapped[str] = mapped_column(String(32), default="")
    sensor_value: Mapped[float | None] = mapped_column(Float, nullable=True)
    video_confidence: Mapped[float | None] = mapped_column(Float, nullable=True)
    last_checked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    properties: Mapped[dict] = mapped_column(JSON, default=dict)