"""CustomFieldDefinition model — user-defined custom fields stored in DB."""

from __future__ import annotations

import uuid
from typing import Any

from sqlalchemy import Boolean, Integer, JSON, String, UniqueConstraint
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin
from app.models.owned_mixin import OwnedMixin


class CustomFieldDefinition(Base, TenantMixin, OwnedMixin):
    """User-defined custom field definition stored in the database.

    These definitions are merged with plugin-provided custom fields
    at query time. Each definition is scoped to a tenant and entity type.
    """

    __tablename__ = "custom_field_definitions"
    __table_args__ = (
        UniqueConstraint(
            "tenant_id", "entity", "name",
            name="uq_custom_field_def_tenant_entity_name",
        ),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )

    # ── Identity ──
    entity: Mapped[str] = mapped_column(String(50), nullable=False, index=True)
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    label: Mapped[str] = mapped_column(String(200), nullable=False)

    # ── Type & Options ──
    field_type: Mapped[str] = mapped_column(
        String(20), nullable=False, default="text"
    )  # text, number, date, select, multiselect, boolean
    options: Mapped[list[str] | None] = mapped_column(JSON, nullable=True, default=list)
    default_value: Mapped[Any | None] = mapped_column(JSON, nullable=True, default=None)

    # ── Sensitivity (field-level permissions) ──
    sensitivity: Mapped[str] = mapped_column(String(20), nullable=False, default='normal')

    # ── Behaviour ──
    required: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)
    sort_order: Mapped[int] = mapped_column(Integer, nullable=False, default=0)

    # ── Audit ──
    created_by: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), nullable=True
    )
    updated_by: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), nullable=True
    )