from datetime import datetime

from sqlalchemy import DateTime, String, Text, func
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class Host(Base):
    __tablename__ = "hosts"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    agent_instance_id: Mapped[str | None] = mapped_column(String(128), unique=True, index=True)
    hostname: Mapped[str] = mapped_column(String(255), index=True)
    display_name: Mapped[str | None] = mapped_column(String(255))
    os_family: Mapped[str] = mapped_column(String(32))
    os_version: Mapped[str | None] = mapped_column(String(128))
    product: Mapped[str] = mapped_column(String(64), index=True)
    product_version: Mapped[str | None] = mapped_column(String(64))
    ipv4: Mapped[str | None] = mapped_column(String(45))
    ipv6: Mapped[str | None] = mapped_column(String(45))
    tags: Mapped[list | None] = mapped_column(JSONB, default=list)
    inventory: Mapped[dict | None] = mapped_column(JSONB)
    inventory_updated_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    use_sac_mode: Mapped[str | None] = mapped_column(String(32))
    ssh_admin_ok: Mapped[bool | None] = mapped_column(nullable=True)
    ssh_admin_checked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    # Optional override for SSH/WinRM (home PCs, unique local admin). Empty → global Settings.
    mgmt_user: Mapped[str | None] = mapped_column(String(256))
    mgmt_password: Mapped[str | None] = mapped_column(Text)
    pending_agent_update: Mapped[bool] = mapped_column(default=False, server_default="false")
    pending_update_requested_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    pending_update_target_version: Mapped[str | None] = mapped_column(String(64))
    agent_config: Mapped[dict | None] = mapped_column(JSONB)
    agent_config_revision: Mapped[int] = mapped_column(default=0, server_default="0")
    agent_update_state: Mapped[str | None] = mapped_column(String(32))
    agent_update_last_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    agent_update_last_error: Mapped[str | None] = mapped_column(Text)
    remote_action: Mapped[dict | None] = mapped_column(JSONB)
    last_seen_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())

    events: Mapped[list["Event"]] = relationship(back_populates="host")
    agent_commands: Mapped[list["AgentCommand"]] = relationship(back_populates="host")