from typing import Optional

from sqlalchemy import Boolean, ForeignKey, Integer, String, Table, Column
from sqlalchemy.orm import Mapped, mapped_column, relationship

from .base import Base, TimestampMixin

# Association table for object ↔ tags
object_tags = Table(
    "object_tags",
    Base.metadata,
    Column("object_id", Integer, ForeignKey("objects.id", ondelete="CASCADE"), primary_key=True),
    Column("tag_id", Integer, ForeignKey("tags.id", ondelete="CASCADE"), primary_key=True),
)


class Object(Base, TimestampMixin):
    __tablename__ = "objects"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[Optional[str]] = mapped_column(String(1000), nullable=True)

    # Network
    server_ip: Mapped[Optional[str]] = mapped_column(String(45), nullable=True)

    # Object DB connection (for auto-sync from site's PostgreSQL)
    db_host: Mapped[Optional[str]] = mapped_column(String(255), nullable=True)
    db_port: Mapped[int] = mapped_column(Integer, nullable=False, default=5432)
    db_name: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
    db_user: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
    db_pass_enc: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    db_table: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
    db_col_ip: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
    db_col_type: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
    db_via_tunnel: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)

    # Default SSH credentials for devices on this object
    ssh_user: Mapped[Optional[str]] = mapped_column(String(100), nullable=True)
    ssh_pass_enc: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    ssh_port: Mapped[int] = mapped_column(Integer, nullable=False, default=22)

    notes: Mapped[Optional[str]] = mapped_column(String(2000), nullable=True)
    is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)

    devices: Mapped[list["Device"]] = relationship(
        "Device", back_populates="object", cascade="all, delete-orphan"
    )
    racks: Mapped[list["Rack"]] = relationship(
        "Rack", back_populates="object", cascade="all, delete-orphan"
    )
    zones: Mapped[list["Zone"]] = relationship(
        "Zone", back_populates="object", cascade="all, delete-orphan"
    )
    tags: Mapped[list["Tag"]] = relationship("Tag", secondary=object_tags)