# -*- coding: utf-8 -*-
"""
系统配置 API（需要登录）：
- GET  /api/settings         -> 查询所有配置
- POST /api/settings         -> 批量更新配置（传入 key-value 对象）
- GET  /api/settings/{key}   -> 查询单个配置
"""
from rest_framework import status
from rest_framework.decorators import api_view

from server.core.response import api_success, api_error
from server.models import SystemConfig
from server.serializers import SystemConfigSerializer


@api_view(["GET", "POST"])
def settings_list(request):
    if request.method == "GET":
        qs = SystemConfig.objects.all().order_by("key")
        return api_success(SystemConfigSerializer(qs, many=True).data)

    # POST: 批量更新，请求体格式 {"key1": "value1", "key2": "value2", ...}
    if not isinstance(request.data, dict):
        return api_error(status.HTTP_400_BAD_REQUEST, "请传入 key-value 对象")

    results = []
    for key, value in request.data.items():
        obj, created = SystemConfig.objects.update_or_create(
            key=key,
            defaults={"value": str(value)},
        )
        results.append(SystemConfigSerializer(obj).data)
    return api_success(results)


@api_view(["GET"])
def settings_detail(request, key):
    try:
        obj = SystemConfig.objects.get(key=key)
    except SystemConfig.DoesNotExist:
        return api_error(status.HTTP_404_NOT_FOUND, f"配置项 '{key}' 不存在")
    return api_success(SystemConfigSerializer(obj).data)