"""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 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。"
        ),
    })


# Kept beside the UI's RANGES table (client/src/lib/ranges.ts). Each entry says
# where that metric's band edges came from — the honest answer for several of
# them is "general-population orientation figures", and it says so.
BAND_SOURCES = [
    {"metric": "步数", "bands": "<5k 偏低 · 5–8k 一般 · 8–12k 达标 · >12k 优秀",
     "source": "步数与死亡率的队列研究（约 8000 步起获益明显，12000 步后趋平）"},
    {"metric": "静息心率", "bands": "<50 很低 · 50–65 正常 · 65–75 偏高 · >75 较高",
     "source": "健康成人静息心率 60–100 bpm 为正常范围，规律运动者常低于 60"},
    {"metric": "心率变异性", "bands": "<25 偏低 · 25–40 一般 · 40–70 良好 · >70 很好",
     "source": "夜间 RMSSD 的一般人群分布；个体差异极大，趋势比绝对值更有意义"},
    {"metric": "睡眠时长", "bands": "<6h 不足 · 6–7h 偏少 · 7–9h 充足 · >9h 偏多",
     "source": "美国睡眠医学会 / 睡眠研究会成人 7–9 小时建议"},
    {"metric": "压力", "bands": "0–25 休息 · 26–50 偏低 · 51–75 中等 · >75 偏高",
     "source": "Garmin 官方压力分级，与手表显示一致"},
    {"metric": "身体电量", "bands": "0–25 很低 · 26–50 偏低 · 51–75 良好 · >75 充足",
     "source": "Garmin 官方 Body Battery 分级"},
    {"metric": "血氧", "bands": "<90 偏低 · 90–94 略低 · ≥95 正常",
     "source": "静息血氧饱和度常用临床参考；腕表光学测量误差较大，仅供趋势参考"},
    {"metric": "呼吸频率", "bands": "<12 偏低 · 12–20 正常 · >20 偏高",
     "source": "成人静息呼吸频率 12–20 次/分"},
    {"metric": "强度分钟", "bands": "<10 偏少 · 10–21 一般 · ≥21 达标",
     "source": "WHO 每周 150 分钟中等强度活动，折合每天约 21 分钟"},
    {"metric": "训练准备度", "bands": "0–25 很低 · 26–50 偏低 · 51–75 就绪 · >75 很好",
     "source": "Garmin 官方 Training Readiness 分级"},
    {"metric": "爬楼", "bands": "<5 偏少 · 5–10 达标 · >10 优秀",
     "source": "一般性活动量参考，无权威标准"},
]