"""
Infinity向量数据库索引管理器
"""
from typing import Dict, Any, Optional
from services.utils.infinity.base import InfinityConnection


class InfinityIndexManager:
    """
    Infinity向量数据库索引管理器
    负责索引（collection）的创建、删除和检查
    """
    
    def __init__(self, infinity_connection: Optional[InfinityConnection] = None):
        """
        初始化索引管理器
        
        Args:
            infinity_connection: Infinity连接实例，可选
        """
        self.infinity_conn = infinity_connection or InfinityConnection()
    
    def create_index(self, index_name: str, mappings: Dict[str, Any] = None) -> bool:
        """
        创建索引（Infinity中的collection）
        
        Args:
            index_name: 索引名称
            mappings: 自定义映射，会与默认映射合并
        
        Returns:
            bool: 创建是否成功
        """
        try:
            # 创建collection的API路径
            path = f"/api/collections/{index_name}"
            
            # 默认映射配置
            default_mappings = {
                "fields": [
                    {"name": "file_name", "type": "string"},
                    {"name": "file_page_count", "type": "integer"},
                    {"name": "page_number", "type": "integer"},
                    {"name": "text", "type": "string"},
                    {"name": "image_path", "type": "string"},
                    {"name": "sparse_vector", "type": "array<array<{string, float}>>"},
                    {"name": "dense_vector_1024", "type": "array<float>"},
                    {"name": "dataset_id", "type": "string"},
                    {"name": "document_id", "type": "string"}
                ],
                "indexes": [
                    {
                        "name": f"{index_name}_vector_index",
                        "field": "dense_vector_1024",
                        "type": "vector",
                        "params": {
                            "dimension": 1024,
                            "metric": "cosine"
                        }
                    }
                ]
            }
            
            # 合并用户映射和默认映射
            final_mappings = {**default_mappings, **(mappings or {})}
            
            response = self.infinity_conn._make_request("PUT", path, final_mappings)
            return "error" not in response
        except Exception as e:
            print(f"创建Infinity索引失败: {e}")
            return False
    
    def delete_index(self, index_name: str) -> bool:
        """
        删除索引（collection）
        
        Args:
            index_name: 索引名称
        
        Returns:
            bool: 删除是否成功
        """
        try:
            path = f"/api/collections/{index_name}"
            response = self.infinity_conn._make_request("DELETE", path)
            return "error" not in response
        except Exception as e:
            print(f"删除Infinity索引失败: {e}")
            return False
    
    def index_exists(self, index_name: str) -> bool:
        """
        检查索引是否存在
        
        Args:
            index_name: 索引名称
        
        Returns:
            bool: 索引是否存在
        """
        try:
            path = f"/api/collections/{index_name}"
            response = self.infinity_conn._make_request("GET", path)
            return "error" not in response
        except Exception as e:
            print(f"检查Infinity索引存在失败: {e}")
            return False
    
    def get_index_info(self, index_name: str) -> Dict[str, Any]:
        """
        获取索引信息
        
        Args:
            index_name: 索引名称
        
        Returns:
            Dict[str, Any]: 索引信息
        """
        try:
            path = f"/api/collections/{index_name}"
            response = self.infinity_conn._make_request("GET", path)
            return response
        except Exception as e:
            print(f"获取Infinity索引信息失败: {e}")
            return {}
    
    def list_indexes(self) -> list:
        """
        获取所有索引列表
        
        Returns:
            list: 索引列表
        """
        try:
            path = "/api/collections"
            response = self.infinity_conn._make_request("GET", path)
            return response.get("collections", [])
        except Exception as e:
            print(f"获取Infinity索引列表失败: {e}")
            return []