import uuid
from datetime import datetime, timedelta

# 全局变量存储token
TEMP_TOKENS = {}


class TokenManager:
    @staticmethod
    def generate_token():
        """生成随机token"""
        return str(uuid.uuid4())

    @staticmethod
    def store_token(token, user, remember=False):
        """存储token"""
        expires_at = datetime.now() + timedelta(days=7 if remember else 1)
        TEMP_TOKENS[token] = {"user": user, "expires_at": expires_at}

    @staticmethod
    def validate_token(token):
        """验证token并返回用户信息"""
        if not token or token not in TEMP_TOKENS:
            return None

        # 检查token是否过期
        if datetime.now() > TEMP_TOKENS[token]["expires_at"]:
            del TEMP_TOKENS[token]
            return None

        return TEMP_TOKENS[token]["user"]

    @staticmethod
    def remove_token(token):
        """删除token"""
        if token in TEMP_TOKENS:
            del TEMP_TOKENS[token]

    @staticmethod
    def get_token_from_request(request):
        """从请求中提取token"""
        import json
        token = None

        # 从headers获取
        if hasattr(request, 'headers'):
            try:
                headers = request.headers
                if headers:
                    # 方法1：直接用get方法获取（Robyn的Headers对象支持）
                    try:
                        token_value = headers.get('token', None)
                        if token_value:
                            token = token_value[0] if isinstance(token_value, list) else token_value
                    except:
                        pass
                    
                    # 方法2：尝试大写Token
                    if not token:
                        try:
                            token_value = headers.get('Token', None)
                            if token_value:
                                token = token_value[0] if isinstance(token_value, list) else token_value
                        except:
                            pass
                    
                    # 方法3：如果headers是字符串（JSON格式），解析它
                    if not token:
                        try:
                            headers_str = str(headers)
                            if headers_str.startswith('{'):
                                headers_dict = json.loads(headers_str)
                                token_value = headers_dict.get('token') or headers_dict.get('Token')
                                if token_value:
                                    token = token_value[0] if isinstance(token_value, list) else token_value
                        except:
                            pass
            except:
                pass

        # 从query参数获取
        if not token and hasattr(request, 'query_params'):
            try:
                query_params = getattr(request, 'query_params', {})
                # Robyn的query_params.get()需要提供默认值
                token_value = query_params.get('token', None)
                if token_value:
                    token = token_value[0] if isinstance(token_value, list) else token_value
                
                # 也尝试从 headers[token] 参数获取
                if not token:
                    token_value = query_params.get('headers[token]', None)
                    if token_value:
                        token = token_value[0] if isinstance(token_value, list) else token_value
                
                # 尝试URL编码的版本
                if not token:
                    token_value = query_params.get('headers%5Btoken%5D', None)
                    if token_value:
                        token = token_value[0] if isinstance(token_value, list) else token_value
            except:
                pass

        # 从body中获取
        if not token and hasattr(request, 'body') and request.body:
            try:
                body_data = json.loads(request.body)
                token = body_data.get('token')
            except:
                pass

        return token