from datetime import UTC, datetime

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


class Base(DeclarativeBase):
    pass


def now_utc() -> datetime:
    return datetime.now(UTC)


class User(Base):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    username: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
    password_digest: Mapped[str] = mapped_column(String(255), nullable=False)
    admin: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)


class Overlay(Base):
    __tablename__ = "overlays"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    name: Mapped[str] = mapped_column(String(128), unique=True, nullable=False)
    path: Mapped[str] = mapped_column(String(512), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)


class Blueprint(Base):
    __tablename__ = "blueprints"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False)
    name: Mapped[str] = mapped_column(String(128), nullable=False)
    arguments: Mapped[str] = mapped_column(Text, default="[]", nullable=False)
    config: Mapped[str] = mapped_column(Text, default="[]", nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)


class BlueprintOverlay(Base):
    __tablename__ = "blueprint_overlays"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    blueprint_id: Mapped[int] = mapped_column(ForeignKey("blueprints.id"), nullable=False)
    overlay_id: Mapped[int] = mapped_column(ForeignKey("overlays.id"), nullable=False)
    position: Mapped[int] = mapped_column(Integer, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)


class Server(Base):
    __tablename__ = "servers"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False)
    blueprint_id: Mapped[int] = mapped_column(ForeignKey("blueprints.id"), nullable=False)
    name: Mapped[str] = mapped_column(String(128), unique=True, nullable=False)
    port: Mapped[int] = mapped_column(Integer, nullable=False)
    desired_state: Mapped[str] = mapped_column(String(16), default="stopped", nullable=False)
    actual_state: Mapped[str] = mapped_column(String(16), default="unknown", nullable=False)
    actual_state_updated_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    last_error: Mapped[str] = mapped_column(Text, default="", nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)


class Job(Base):
    __tablename__ = "jobs"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False)
    server_id: Mapped[int | None] = mapped_column(ForeignKey("servers.id"), nullable=True)
    operation: Mapped[str] = mapped_column(String(32), nullable=False)
    state: Mapped[str] = mapped_column(String(16), default="queued", nullable=False)
    exit_code: Mapped[int | None] = mapped_column(Integer, nullable=True)
    started_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    finished_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)


class JobLog(Base):
    __tablename__ = "job_logs"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    job_id: Mapped[int] = mapped_column(ForeignKey("jobs.id"), nullable=False)
    seq: Mapped[int] = mapped_column(Integer, nullable=False)
    stream: Mapped[str] = mapped_column(String(8), nullable=False)
    line: Mapped[str] = mapped_column(Text, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=now_utc, nullable=False)