"""User and UserTenant models."""

from __future__ import annotations

import uuid
from datetime import datetime
from typing import Any

from sqlalchemy import Boolean, DateTime, ForeignKey, String, UniqueConstraint, func
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin


class User(Base, TenantMixin):
    """User entity — belongs to a tenant, can be member of multiple tenants."""

    __tablename__ = "users"
    __table_args__ = (UniqueConstraint("tenant_id", "email", name="uq_users_tenant_email"),)

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    email: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
    name: Mapped[str] = mapped_column(String(200), nullable=False)
    first_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
    last_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
    avatar_url: Mapped[str | None] = mapped_column(String(500), nullable=True)
    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
    role: Mapped[str] = mapped_column(String(50), nullable=False, default="viewer")
    role_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("roles.id", ondelete="SET NULL"),
        nullable=True,
        index=True,
    )
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    preferences: Mapped[dict[str, Any]] = mapped_column(JSONB, default=dict, nullable=False)
    is_system_admin: Mapped[bool] = mapped_column(
        Boolean, default=False, nullable=False, server_default="false"
    )


class UserTenant(Base):
    """N:M association — user membership in tenants."""

    __tablename__ = "user_tenants"

    user_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), primary_key=True
    )
    tenant_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("tenants.id", ondelete="CASCADE"), primary_key=True
    )
    is_default: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    role_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("roles.id", ondelete="SET NULL"),
        nullable=True,
        index=True,
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
