from typing import Dict, Any, List, Optional

class DocumentService:
    def __init__(self, http_client):
        self.http_client = http_client
    
    def upload_document(self, dataset_id: str, file_path: str) -> List[Dict[str, Any]]:
        endpoint = f"/api/v1/datasets/{dataset_id}/documents"
        
        with open(file_path, 'rb') as f:
            files = {'file': (file_path.split('/')[-1], f)}
            headers = {'Content-Type': 'multipart/form-data'}
            
            response = self.http_client.post(endpoint, files=files, headers=headers)
        
        if response.get("code") == 0 and response.get("data"):
            return response["data"]
        else:
            raise Exception(f"上传文档失败: {response.get('message', '未知错误')}")
    
    def update_document(self, dataset_id: str, document_id: str, 
                       name: str = None, meta_fields: Dict = None, 
                       chunk_method: str = None, parser_config: Dict = None,
                       enabled: int = None) -> Dict[str, Any]:
        endpoint = f"/api/v1/datasets/{dataset_id}/documents/{document_id}"
        
        data = {}
        if name is not None:
            data["name"] = name
        if meta_fields is not None:
            data["meta_fields"] = meta_fields
        if chunk_method is not None:
            data["chunk_method"] = chunk_method
        if parser_config is not None:
            data["parser_config"] = parser_config
        if enabled is not None:
            data["enabled"] = enabled
        
        response = self.http_client.post(endpoint, json=data)
        
        if response.get("code") == 0 and response.get("data"):
            return response["data"]
        else:
            raise Exception(f"更新文档失败: {response.get('message', '未知错误')}")
    
    def delete_document(self, dataset_id: str, document_id: str) -> bool:
        endpoint = f"/api/v1/datasets/{dataset_id}/documents/{document_id}"
        
        response = self.http_client.post(endpoint, json={})
        
        if response.get("code") == 0:
            return True
        else:
            raise Exception(f"删除文档失败: {response.get('message', '未知错误')}")
    
    def delete_documents(self, dataset_id: str, document_ids: List[str]) -> bool:
        endpoint = f"/api/v1/datasets/{dataset_id}/documents"
        
        response = self.http_client.post(endpoint, json={"document_ids": document_ids})
        
        if response.get("code") == 0:
            return True
        else:
            raise Exception(f"批量删除文档失败: {response.get('message', '未知错误')}")
    
    def get_document(self, dataset_id: str, document_id: str) -> Dict[str, Any]:
        endpoint = f"/api/v1/datasets/{dataset_id}/documents/{document_id}"
        
        response = self.http_client.get(endpoint)
        
        if response.get("code") == 0 and response.get("data"):
            return response["data"]
        else:
            raise Exception(f"获取文档失败: {response.get('message', '未知错误')}")
    
    def list_documents(self, dataset_id: str, page: int = 1, size: int = 20,
                      keywords: str = None, document_id: str = None, document_name: str = None,
                      suffix: str = None, run: str = None) -> List[Dict[str, Any]]:
        endpoint = f"/api/v1/datasets/{dataset_id}/documents"
        
        params = {"page": page, "page_size": size}
        if keywords is not None:
            params["keywords"] = keywords
        if document_id is not None:
            params["id"] = document_id
        if document_name is not None:
            params["name"] = document_name
        if suffix is not None:
            params["suffix"] = suffix
        if run is not None:
            params["run"] = run
        
        response = self.http_client.get(endpoint, params=params)
        
        if response.get("code") == 0 and response.get("data"):
            return response["data"]
        else:
            raise Exception(f"列出文档失败: {response.get('message', '未知错误')}")
    
    def get_document_chunks(self, dataset_id: str, document_id: str,
                           keywords: str = None, page: int = 1, size: int = 20,
                           chunk_id: str = None) -> List[Dict[str, Any]]:
        endpoint = f"/api/v1/datasets/{dataset_id}/documents/{document_id}/chunks"
        
        params = {"page": page, "page_size": size}
        if keywords is not None:
            params["keywords"] = keywords
        if chunk_id is not None:
            params["id"] = chunk_id
        
        response = self.http_client.get(endpoint, params=params)
        
        if response.get("code") == 0 and response.get("data"):
            return response["data"]
        else:
            raise Exception(f"获取文档切片失败: {response.get('message', '未知错误')}")
    
    def parse_document(self, dataset_id: str, document_ids: List[str]) -> bool:
        endpoint = f"/api/v1/datasets/{dataset_id}/chunks"
        
        response = self.http_client.post(endpoint, json={"document_ids": document_ids})
        
        if response.get("code") == 0:
            return True
        else:
            raise Exception(f"解析文档失败: {response.get('message', '未知错误')}")