"""Auth routes: login, current user, first-time admin setup. No self-registration."""
from __future__ import annotations

from flask import Blueprint, jsonify, request

from ..auth.users import AuthError
from .helpers import ApiError, current_user, require_auth

auth_bp = Blueprint("auth", __name__)


def _store():
    from flask import current_app

    return current_app.extensions["user_store"]


def _login_body(data: dict) -> str:
    # Accept `username` (primary) or `email` (fallback), lower-cased.
    return (data.get("username") or data.get("email") or "").strip().lower()


@auth_bp.post("/login")
def login():
    data = request.get_json(silent=True) or {}
    username = _login_body(data)
    password = data.get("password") or ""
    if not username or not password:
        raise ApiError("username and password are required")
    try:
        user = _store().verify(username, password)
        token = _store().issue_token(user)
    except AuthError as exc:
        raise ApiError(str(exc), 401)
    return jsonify({
        "token": token,
        "user": _store().public_user(user),
        "must_setup": bool(user.get("must_setup")),
    })


@auth_bp.get("/me")
@require_auth
def me():
    return jsonify({"user": _store().public_user(current_user())})


@auth_bp.post("/setup")
@require_auth
def setup():
    """First-time admin setup: set email + change password, then clear must_setup."""
    user = current_user()
    data = request.get_json(silent=True) or {}
    username = (data.get("username") or user.get("username") or user.get("id") or "").strip().lower()
    email = (data.get("email") or "").strip()
    new_password = data.get("password") or ""
    if not email or not new_password:
        raise ApiError("email and new password are required")
    try:
        updated = _store().complete_setup(username, email, new_password)
    except AuthError as exc:
        raise ApiError(str(exc), 400)
    return jsonify({
        "ok": True,
        "user": _store().public_user(updated),
        "must_setup": False,
    })


@auth_bp.patch("/profile")
@require_auth
def profile():
    """Self-service profile update: name (and optional email). Any authenticated user."""
    user = current_user()
    data = request.get_json(silent=True) or {}
    username = user.get("username") or user.get("id")
    try:
        if "name" in data:
            _store().set_name(username, data.get("name"))
        if "email" in data:
            _store().set_email(username, data.get("email"))
    except AuthError as exc:
        raise ApiError(str(exc), 400)
    return jsonify({"user": _store().public_user(_store().get_user(username))})