from __future__ import annotations

import enum
from datetime import datetime

from sqlalchemy import Boolean, DateTime, String
from sqlalchemy.orm import Mapped, mapped_column, validates

from app.db.base import Base, TimestampMixin, UUIDMixin


class UserRole(str, enum.Enum):
    ADMIN = "admin"
    PRUEFER = "pruefer"
    MITARBEITER = "mitarbeiter"
    LESER = "leser"


class User(Base, UUIDMixin, TimestampMixin):
    __tablename__ = "users"

    email: Mapped[str] = mapped_column(String(255), unique=True, index=True)
    full_name: Mapped[str] = mapped_column(String(160), nullable=False)
    first_name: Mapped[str] = mapped_column(String(80))
    last_name: Mapped[str] = mapped_column(String(80))
    role: Mapped[str] = mapped_column(String(50), nullable=False, default=UserRole.MITARBEITER.value)
    password_hash: Mapped[str] = mapped_column(String(255))
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    must_change_password: Mapped[bool] = mapped_column(Boolean, default=True)
    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    last_login_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    password_changed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)

    @validates("first_name", "last_name")
    def _sync_full_name(self, key: str, value: str) -> str:
        first_name = value if key == "first_name" else getattr(self, "first_name", None)
        last_name = value if key == "last_name" else getattr(self, "last_name", None)
        if first_name is not None and last_name is not None:
            self.full_name = f"{first_name} {last_name}".strip()
        return value