from __future__ import annotations

from datetime import datetime
from uuid import uuid4

from sqlalchemy import (
    DateTime,
    ForeignKey,
    Index,
    Integer,
    JSON,
    String,
    UniqueConstraint,
)
from sqlalchemy.orm import Mapped, mapped_column

from app.security.models import Base, utcnow


class ProjectEditorState(Base):
    """The one authoritative current editor document for a project."""

    __tablename__ = "project_editor_states"
    __table_args__ = (
        UniqueConstraint("project_id", name="uq_project_editor_state_project"),
        Index("ix_project_editor_states_workspace_project", "workspace_id", "project_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("workspaces.id", ondelete="RESTRICT"), nullable=False
    )
    project_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("projects.id", ondelete="RESTRICT"), nullable=False
    )
    revision: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
    schema_version: Mapped[int] = mapped_column(Integer, nullable=False)
    state_json: Mapped[dict[str, object]] = mapped_column(
        "state", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow)
    updated_by: Mapped[str] = mapped_column(
        String(36), ForeignKey("users.id", ondelete="RESTRICT"), nullable=False
    )