"""Authentication router — register, login, refresh, me."""

from __future__ import annotations

from typing import Annotated

from fastapi import APIRouter, Depends
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.database import get_db
from app.core.security import get_current_user, require_roles
from app.models.user import User
from app.schemas.auth import (
    LoginRequest,
    RefreshRequest,
    RegisterRequest,
    TokenResponse,
    UserOut,
)
from app.services import auth as auth_service

router = APIRouter(prefix="/api/auth", tags=["auth"])


@router.get("/users", response_model=list[UserOut])
async def list_users(
    db: Annotated[AsyncSession, Depends(get_db)],
    current_user: Annotated[User, Depends(get_current_user)],
) -> list[User]:
    """List users (id, name, role) for assignment pickers.

    Previously the frontend hard-coded technician ids/names in detail.html;
    this endpoint makes the assign dropdown data-driven so a seed change never
    silently breaks technician assignment.
    """
    result = await db.execute(select(User).order_by(User.full_name))
    return list(result.scalars().all())


@router.post("/register", response_model=UserOut, status_code=201)
async def register(
    body: RegisterRequest,
    db: Annotated[AsyncSession, Depends(get_db)],
) -> User:
    return await auth_service.register(db, body)


@router.post("/login", response_model=TokenResponse)
async def login(
    body: LoginRequest,
    db: Annotated[AsyncSession, Depends(get_db)],
) -> TokenResponse:
    access, refresh, _user = await auth_service.login(db, body.email, body.password)
    return TokenResponse(access_token=access, refresh_token=refresh)


@router.post("/refresh", response_model=TokenResponse)
async def refresh(
    body: RefreshRequest,
    db: Annotated[AsyncSession, Depends(get_db)],
) -> TokenResponse:
    access, refresh = await auth_service.refresh_access_token(db, body.refresh_token)
    return TokenResponse(access_token=access, refresh_token=refresh)


@router.get("/me", response_model=UserOut)
async def me(current_user: Annotated[User, Depends(get_current_user)]) -> User:
    return current_user


@router.get("/admin-only", response_model=UserOut)
async def admin_only(
    current_user: Annotated[User, Depends(require_roles("Admin/Jerome", "Admin/Wahab"))],
) -> User:
    """Example RBAC-protected endpoint — only Admins can access."""
    return current_user