"""Profile, units and sync preferences."""
from flask import Blueprint, request, g, jsonify

from auth import require_auth
from services import settings as settings_svc
from services.insights import BAND_SOURCES
from services import fitness_age

bp = Blueprint("settings", __name__)


@bp.route("", methods=["GET"])
@bp.route("/", methods=["GET"])
@require_auth
def get_settings():
    return jsonify(settings_svc.get_settings(g.user_id))


@bp.route("", methods=["PUT"])
@bp.route("/", methods=["PUT"])
@require_auth
def put_settings():
    try:
        return jsonify(settings_svc.save_settings(g.user_id, request.json or {}))
    except settings_svc.InvalidSetting as e:
        return jsonify({"error": str(e)}), 400


@bp.route("/options", methods=["GET"])
@require_auth
def options():
    """The values the pickers may offer, so the UI never invents one the
    backend would reject."""
    return jsonify({
        "sexes": list(settings_svc.SEXES),
        "units": list(settings_svc.UNITS),
        "autoSyncMinutes": list(settings_svc.INTERVALS),
        "historyDays": list(settings_svc.HISTORY),
    })


@bp.route("/rating-basis", methods=["GET"])
@require_auth
def rating_basis():
    """Where every rating in the app comes from.

    Surfaced in 设置 because a band that colours a number 偏低 is making a
    claim, and the user is entitled to see what that claim rests on.
    """
    return jsonify({
        "fitnessAge": fitness_age.BASIS,
        "bands": BAND_SOURCES,
        "note": (
            "参考区间用于给数字一个位置感，不是诊断标准。"
            "AI 只负责解读这些结果，不参与设定任何阈值。"
        ),
    })