from flask import Blueprint, request, jsonify
from flask_jwt_extended import jwt_required
from ..models import SystemSettings, db
from functools import wraps

settings_bp = Blueprint('settings', __name__)

def admin_required(fn):
    @wraps(fn)
    @jwt_required()
    def wrapper(*args, **kwargs):
        from flask_jwt_extended import get_jwt
        if not get_jwt().get('is_admin'):
            return jsonify({'message': '需要管理员权限'}), 403
        return fn(*args, **kwargs)
    return wrapper

@settings_bp.route('/settings', methods=['GET'])
@admin_required
def get_all_settings():
    """获取所有系统设置"""
    settings = SystemSettings.query.all()
    return jsonify([setting.to_dict() for setting in settings]), 200

@settings_bp.route('/settings/<string:key>', methods=['GET'])
@admin_required
def get_setting(key):
    """获取单个设置"""
    setting = SystemSettings.query.filter_by(key=key).first()
    if not setting:
        return jsonify({'message': '设置不存在'}), 404
    return jsonify(setting.to_dict()), 200

@settings_bp.route('/settings/<string:key>', methods=['PUT'])
@admin_required
def update_setting(key):
    """更新单个设置"""
    data = request.get_json()
    if 'value' not in data:
        return jsonify({'message': '缺少value字段'}), 400
    
    value = data['value']
    description = data.get('description')
    data_type = data.get('data_type', 'string')
    
    setting = SystemSettings.set_value(key, value, description, data_type)
    return jsonify(setting.to_dict()), 200

@settings_bp.route('/settings', methods=['PUT'])
@admin_required
def update_multiple_settings():
    """批量更新设置"""
    data = request.get_json()
    if not isinstance(data, dict):
        return jsonify({'message': '数据格式错误'}), 400
    
    updated_settings = []
    for key, setting_data in data.items():
        if isinstance(setting_data, dict):
            value = setting_data.get('value')
            description = setting_data.get('description')
            data_type = setting_data.get('data_type', 'string')
        else:
            value = setting_data
            description = None
            data_type = 'string'
        
        if value is not None:
            setting = SystemSettings.set_value(key, value, description, data_type)
            updated_settings.append(setting.to_dict())
    
    return jsonify(updated_settings), 200

@settings_bp.route('/settings/defaults', methods=['POST'])
@admin_required
def init_default_settings():
    """初始化默认设置"""
    default_settings = {
        'daily_quota': {
            'value': '5',
            'description': '用户每日可领取文件数量',
            'data_type': 'int'
        },
        'max_file_size': {
            'value': '10485760',  # 10MB
            'description': '上传文件最大大小（字节）',
            'data_type': 'int'
        },
        'auto_reset_quota': {
            'value': 'true',
            'description': '是否自动重置用户每日领取配额',
            'data_type': 'bool'
        },
        'reset_hour': {
            'value': '0',
            'description': '每日配额重置时间（小时，0-23）',
            'data_type': 'int'
        },
        'allow_registration': {
            'value': 'true',
            'description': '是否允许新用户注册',
            'data_type': 'bool'
        },
        'require_admin_approval': {
            'value': 'true',
            'description': '新注册用户是否需要管理员审核',
            'data_type': 'bool'
        },
        'site_name': {
            'value': '文件领取系统',
            'description': '网站名称',
            'data_type': 'string'
        },
        'max_files_per_user': {
            'value': '100',
            'description': '用户最多可上传文件数量',
            'data_type': 'int'
        }
    }
    
    created_settings = []
    for key, config in default_settings.items():
        setting = SystemSettings.set_value(
            key, 
            config['value'], 
            config['description'], 
            config['data_type']
        )
        created_settings.append(setting.to_dict())
    
    return jsonify(created_settings), 201