"""Firmware version tracking and upgrade job ORM models."""

import uuid
from datetime import datetime

from sqlalchemy import (
    BigInteger,
    Boolean,
    DateTime,
    Integer,
    Text,
    UniqueConstraint,
    func,
)
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy import ForeignKey

from app.database import Base


class FirmwareVersion(Base):
    """Cached firmware version from MikroTik download server or poller discovery.

    Not tenant-scoped — firmware versions are global data shared across all tenants.
    """
    __tablename__ = "firmware_versions"
    __table_args__ = (
        UniqueConstraint("architecture", "channel", "version"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        primary_key=True,
        default=uuid.uuid4,
        server_default=func.gen_random_uuid(),
    )
    architecture: Mapped[str] = mapped_column(Text, nullable=False)
    channel: Mapped[str] = mapped_column(Text, nullable=False)  # "stable", "long-term", "testing"
    version: Mapped[str] = mapped_column(Text, nullable=False)
    npk_url: Mapped[str] = mapped_column(Text, nullable=False)
    npk_local_path: Mapped[str | None] = mapped_column(Text, nullable=True)
    npk_size_bytes: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
    checked_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        nullable=False,
    )

    def __repr__(self) -> str:
        return f"<FirmwareVersion arch={self.architecture} ch={self.channel} ver={self.version}>"


class FirmwareUpgradeJob(Base):
    """Tracks a firmware upgrade operation for a single device.

    Multiple jobs can share a rollout_group_id for mass upgrades.
    """
    __tablename__ = "firmware_upgrade_jobs"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        primary_key=True,
        default=uuid.uuid4,
        server_default=func.gen_random_uuid(),
    )
    tenant_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("tenants.id", ondelete="CASCADE"),
        nullable=False,
    )
    device_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("devices.id", ondelete="CASCADE"),
        nullable=False,
    )
    rollout_group_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )
    target_version: Mapped[str] = mapped_column(Text, nullable=False)
    architecture: Mapped[str] = mapped_column(Text, nullable=False)
    channel: Mapped[str] = mapped_column(Text, nullable=False)
    status: Mapped[str] = mapped_column(
        Text, nullable=False, default="pending", server_default="pending"
    )
    pre_upgrade_backup_sha: Mapped[str | None] = mapped_column(Text, nullable=True)
    scheduled_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
    confirmed_major_upgrade: Mapped[bool] = mapped_column(
        Boolean, nullable=False, default=False, server_default="false"
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        nullable=False,
    )

    def __repr__(self) -> str:
        return f"<FirmwareUpgradeJob id={self.id} status={self.status} target={self.target_version}>"