from __future__ import annotations

from datetime import datetime
from typing import Any
import uuid

from sqlalchemy import DateTime, Index, JSON, String, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from govoplan_core.db.base import Base, TimestampMixin


def new_uuid() -> str:
    return str(uuid.uuid4())


class FormDefinitionRevision(Base, TimestampMixin):
    __tablename__ = "form_definition_revisions"
    __table_args__ = (
        UniqueConstraint(
            "tenant_id",
            "form_id",
            "revision",
            name="uq_form_definition_revision",
        ),
        Index(
            "ix_form_definition_current",
            "tenant_id",
            "form_id",
            "superseded_at",
        ),
        Index(
            "ix_form_definition_catalog",
            "tenant_id",
            "publication_state",
            "form_key",
        ),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_uuid)
    tenant_id: Mapped[str] = mapped_column(String(36), nullable=False, index=True)
    form_id: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
    form_key: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
    revision: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
    previous_revision_id: Mapped[str | None] = mapped_column(
        String(36), nullable=True, index=True
    )
    publication_state: Mapped[str] = mapped_column(
        String(30), nullable=False, index=True
    )
    title: Mapped[str] = mapped_column(String(500), nullable=False)
    recorded_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, index=True
    )
    superseded_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True, index=True
    )
    search_text: Mapped[str] = mapped_column(Text, nullable=False)
    payload: Mapped[dict[str, Any]] = mapped_column(JSON, nullable=False)
    changed_by: Mapped[str | None] = mapped_column(
        String(255), nullable=True, index=True
    )


__all__ = ["FormDefinitionRevision"]