#
#  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#
import logging
import json
import os
import re
from common.constants import PAGERANK_FLD
from common import settings
from api.db.db_models import File
from api.db.services.document_service import DocumentService, queue_raptor_o_graphrag_tasks
from api.db.services.file2document_service import File2DocumentService
from api.db.services.file_service import FileService
from api.db.services.knowledgebase_service import KnowledgebaseService
from api.db.services.connector_service import Connector2KbService
from api.db.services.task_service import GRAPH_RAPTOR_FAKE_DOC_ID, TaskService
from api.db.services.user_service import TenantService, UserService, UserTenantService
from api.db.services.tenant_llm_service import TenantLLMService
from common.constants import FileSource, StatusEnum
from api.utils.api_utils import deep_merge, get_parser_config, remap_dictionary_keys, verify_embedding_availability

_VALID_INDEX_TYPES = {"graph", "raptor", "mindmap"}

_INDEX_TYPE_TO_TASK_TYPE = {
    "graph": "graphrag",
    "raptor": "raptor",
    "mindmap": "mindmap",
}

_INDEX_TYPE_TO_TASK_ID_FIELD = {
    "graph": "graphrag_task_id",
    "raptor": "raptor_task_id",
    "mindmap": "mindmap_task_id",
}

_INDEX_TYPE_TO_DISPLAY_NAME = {
    "graph": "Graph",
    "raptor": "RAPTOR",
    "mindmap": "Mindmap",
}


async def create_dataset(tenant_id: str, req: dict):
    """
    Create a new dataset.

    :param tenant_id: tenant ID
    :param req: dataset creation request
    :return: (success, result) or (success, error_message)
    """
    # Extract ext field for additional parameters
    ext_fields = req.pop("ext", {})

    # Map auto_metadata_config (if provided) into parser_config structure
    auto_meta = req.pop("auto_metadata_config", {})
    if auto_meta:
        parser_cfg = req.get("parser_config") or {}
        fields = []
        for f in auto_meta.get("fields", []):
            fields.append(
                {
                    "name": f.get("name", ""),
                    "type": f.get("type", ""),
                    "description": f.get("description"),
                    "examples": f.get("examples"),
                    "restrict_values": f.get("restrict_values", False),
                }
            )
        parser_cfg["metadata"] = fields
        parser_cfg["enable_metadata"] = auto_meta.get("enabled", True)
        req["parser_config"] = parser_cfg
    req.update(ext_fields)

    e, create_dict = KnowledgebaseService.create_with_name(name=req.pop("name", None), tenant_id=tenant_id, parser_id=req.pop("parser_id", None), **req)

    if not e:
        return False, create_dict

    # Insert embedding model(embd id)
    ok, t = TenantService.get_by_id(tenant_id)
    if not ok:
        return False, "Tenant not found"
    if not create_dict.get("embd_id"):
        create_dict["embd_id"] = t.embd_id
    else:
        ok, err = verify_embedding_availability(create_dict["embd_id"], tenant_id)
        if not ok:
            return False, err

    if not KnowledgebaseService.save(**create_dict):
        return False, "Failed to save dataset"
    ok, k = KnowledgebaseService.get_by_id(create_dict["id"])
    if not ok:
        return False, "Dataset created failed"
    response_data = remap_dictionary_keys(k.to_dict())
    return True, response_data


async def delete_datasets(tenant_id: str, ids: list = None, delete_all: bool = False):
    """
    Delete datasets.

    :param tenant_id: tenant ID
    :param ids: list of dataset IDs
    :param delete_all: whether to delete all datasets of the tenant (if ids is not provided)
    :return: (success, result) or (success, error_message)
    """
    kb_id_instance_pairs = []
    if not ids:
        if not delete_all:
            return True, {"success_count": 0}
        else:
            ids = [kb.id for kb in KnowledgebaseService.query(tenant_id=tenant_id)]

    error_kb_ids = []
    for kb_id in ids:
        kb = KnowledgebaseService.get_or_none(id=kb_id, tenant_id=tenant_id)
        if kb is None:
            error_kb_ids.append(kb_id)
            continue
        kb_id_instance_pairs.append((kb_id, kb))
    if len(error_kb_ids) > 0:
        return False, f"""User '{tenant_id}' lacks permission for datasets: '{", ".join(error_kb_ids)}'"""

    errors = []
    success_count = 0
    for kb_id, kb in kb_id_instance_pairs:
        for doc in DocumentService.query(kb_id=kb_id):
            if not DocumentService.remove_document(doc, tenant_id):
                errors.append(f"Remove document '{doc.id}' error for dataset '{kb_id}'")
                continue
            f2d = File2DocumentService.get_by_document_id(doc.id)
            FileService.filter_delete(
                [
                    File.source_type == FileSource.KNOWLEDGEBASE,
                    File.id == f2d[0].file_id,
                ]
            )
            File2DocumentService.delete_by_document_id(doc.id)
        FileService.filter_delete([File.source_type == FileSource.KNOWLEDGEBASE, File.type == "folder", File.name == kb.name])

        # Drop index for this dataset
        try:
            from rag.nlp import search

            idxnm = search.index_name(kb.tenant_id)
            settings.docStoreConn.delete_idx(idxnm, kb_id)
        except Exception as e:
            errors.append(f"Failed to drop index for dataset {kb_id}: {e}")

        if not KnowledgebaseService.delete_by_id(kb_id):
            errors.append(f"Delete dataset error for {kb_id}")
            continue
        success_count += 1

    if not errors:
        return True, {"success_count": success_count}

    error_message = f"Successfully deleted {success_count} datasets, {len(errors)} failed. Details: {'; '.join(errors)[:128]}..."
    if success_count == 0:
        return False, error_message

    return True, {"success_count": success_count, "errors": errors[:5]}


def get_dataset(dataset_id: str, tenant_id: str):
    """
    Get a single dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, f"User '{tenant_id}' lacks permission for dataset '{dataset_id}'"

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    response_data = remap_dictionary_keys(kb.to_dict())
    response_data["size"] = DocumentService.get_total_size_by_kb_id(dataset_id)
    response_data["connectors"] = list(Connector2KbService.list_connectors(dataset_id))
    return True, response_data


def get_ingestion_summary(dataset_id: str, tenant_id: str):
    """
    Get ingestion summary for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, f"User '{tenant_id}' lacks permission for dataset '{dataset_id}'"

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    status = DocumentService.get_parsing_status_by_kb_ids([dataset_id]).get(dataset_id, {})
    return True, {
        "doc_num": kb.doc_num,
        "chunk_num": kb.chunk_num,
        "token_num": kb.token_num,
        "status": status,
    }


async def update_dataset(tenant_id: str, dataset_id: str, req: dict):
    """
    Update a dataset.

    :param tenant_id: tenant ID
    :param dataset_id: dataset ID
    :param req: dataset update request
    :return: (success, result) or (success, error_message)
    """
    if not req:
        return False, "No properties were modified"

    kb = KnowledgebaseService.get_or_none(id=dataset_id, tenant_id=tenant_id)
    if kb is None:
        return False, f"User '{tenant_id}' lacks permission for dataset '{dataset_id}'"

    # Extract ext field for additional parameters
    ext_fields = req.pop("ext", {})

    # Map auto_metadata_config into parser_config if present
    auto_meta = req.pop("auto_metadata_config", {})
    if auto_meta:
        parser_cfg = req.get("parser_config") or {}
        fields = []
        for f in auto_meta.get("fields", []):
            fields.append(
                {
                    "name": f.get("name", ""),
                    "type": f.get("type", ""),
                    "description": f.get("description"),
                    "examples": f.get("examples"),
                    "restrict_values": f.get("restrict_values", False),
                }
            )
        parser_cfg["metadata"] = fields
        parser_cfg["enable_metadata"] = auto_meta.get("enabled", True)
        req["parser_config"] = parser_cfg

    # Merge ext fields with req
    req.update(ext_fields)

    # Extract connectors from request
    connectors = []
    if "connectors" in req:
        connectors = req["connectors"]
        del req["connectors"]

    if req.get("parser_config"):
        # Flatten parent_child config into children_delimiter for the execution layer
        pc = req["parser_config"].get("parent_child", {})
        if pc.get("use_parent_child"):
            req["parser_config"]["children_delimiter"] = pc.get("children_delimiter", "\n")
            req["parser_config"]["enable_children"] = pc.get("use_parent_child", True)
        else:
            req["parser_config"]["children_delimiter"] = ""
            req["parser_config"]["enable_children"] = False
            req["parser_config"]["parent_child"] = {}

        parser_config = req["parser_config"]
        req_ext_fields = parser_config.pop("ext", {})
        parser_config.update(req_ext_fields)
        req["parser_config"] = deep_merge(kb.parser_config, parser_config)

    if (chunk_method := req.get("parser_id")) and chunk_method != kb.parser_id:
        if not req.get("parser_config"):
            req["parser_config"] = get_parser_config(chunk_method, None)
    elif "parser_config" in req and not req["parser_config"]:
        del req["parser_config"]

    if kb.pipeline_id and req.get("parser_id") and not req.get("pipeline_id"):
        # shift to use parser_id, delete old pipeline_id
        req["pipeline_id"] = ""

    if "name" in req and req["name"].lower() != kb.name.lower():
        exists = KnowledgebaseService.get_or_none(name=req["name"], tenant_id=tenant_id, status=StatusEnum.VALID.value)
        if exists:
            return False, f"Dataset name '{req['name']}' already exists"

    if "embd_id" in req:
        if not req["embd_id"]:
            req["embd_id"] = kb.embd_id
        ok, err = verify_embedding_availability(req["embd_id"], tenant_id)
        if not ok:
            return False, err

    if "pagerank" in req and req["pagerank"] != kb.pagerank:
        if os.environ.get("DOC_ENGINE", "elasticsearch") == "infinity":
            return False, "'pagerank' can only be set when doc_engine is elasticsearch"

        if req["pagerank"] > 0:
            from rag.nlp import search

            settings.docStoreConn.update({"kb_id": kb.id}, {PAGERANK_FLD: req["pagerank"]}, search.index_name(kb.tenant_id), kb.id)
        else:
            # Elasticsearch requires PAGERANK_FLD be non-zero!
            from rag.nlp import search

            settings.docStoreConn.update({"exists": PAGERANK_FLD}, {"remove": PAGERANK_FLD}, search.index_name(kb.tenant_id), kb.id)
    if "parse_type" in req:
        del req["parse_type"]

    if not KnowledgebaseService.update_by_id(kb.id, req):
        return False, "Update dataset error.(Database error)"

    ok, k = KnowledgebaseService.get_by_id(kb.id)
    if not ok:
        return False, "Dataset updated failed"

    # Link connectors to the dataset
    errors = Connector2KbService.link_connectors(kb.id, [conn for conn in connectors], tenant_id)
    if errors:
        logging.error("Link KB errors: %s", errors)

    response_data = remap_dictionary_keys(k.to_dict())
    response_data["connectors"] = connectors
    return True, response_data


def list_datasets(tenant_id: str, args: dict):
    """
    List datasets.

    :param tenant_id: tenant ID
    :param args: query arguments
    :return: (success, result) or (success, error_message)
    """
    kb_id = args.get("id")
    name = args.get("name")
    page = int(args.get("page", 1))
    page_size = int(args.get("page_size", 30))
    ext_fields = args.get("ext", {})
    parser_id = ext_fields.get("parser_id")
    keywords = ext_fields.get("keywords", "")
    orderby = args.get("orderby", "create_time")
    desc_arg = args.get("desc", "true")
    if isinstance(desc_arg, str):
        desc = desc_arg.lower() != "false"
    elif isinstance(desc_arg, bool):
        desc = desc_arg
    else:
        # unknown type, default to True
        desc = True

    if kb_id:
        kbs = KnowledgebaseService.get_kb_by_id(kb_id, tenant_id)
        if not kbs:
            return False, f"User '{tenant_id}' lacks permission for dataset '{kb_id}'"
    if name:
        kbs = KnowledgebaseService.get_kb_by_name(name, tenant_id)
        if not kbs:
            return False, f"User '{tenant_id}' lacks permission for dataset '{name}'"
    if ext_fields.get("owner_ids", []):
        tenant_ids = ext_fields["owner_ids"]
    else:
        tenants = TenantService.get_joined_tenants_by_user_id(tenant_id)
        tenant_ids = [m["tenant_id"] for m in tenants]
    kbs, total = KnowledgebaseService.get_list(tenant_ids, tenant_id, page, page_size, orderby, desc, kb_id, name, keywords, parser_id)
    users = UserService.get_by_ids([m["tenant_id"] for m in kbs])
    user_map = {m.id: m.to_dict() for m in users}
    response_data_list = []
    for kb in kbs:
        user_dict = user_map.get(kb["tenant_id"], {})
        kb.update({"nickname": user_dict.get("nickname", ""), "tenant_avatar": user_dict.get("avatar", "")})
        response_data_list.append(remap_dictionary_keys(kb))
    return True, {"data": response_data_list, "total": total}


async def get_knowledge_graph(dataset_id: str, tenant_id: str):
    """
    Get knowledge graph for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."
    _, kb = KnowledgebaseService.get_by_id(dataset_id)

    req = {"kb_id": [dataset_id], "knowledge_graph_kwd": ["graph"]}

    obj = {"graph": {}, "mind_map": {}}
    from rag.nlp import search

    if not settings.docStoreConn.index_exist(search.index_name(kb.tenant_id), dataset_id):
        return True, obj
    sres = await settings.retriever.search(req, search.index_name(kb.tenant_id), [dataset_id])
    if not len(sres.ids):
        return True, obj

    for id in sres.ids[:1]:
        ty = sres.field[id]["knowledge_graph_kwd"]
        try:
            content_json = json.loads(sres.field[id]["content_with_weight"])
        except Exception:
            continue

        obj[ty] = content_json

    if "nodes" in obj["graph"]:
        obj["graph"]["nodes"] = sorted(obj["graph"]["nodes"], key=lambda x: x.get("pagerank", 0), reverse=True)[:256]
        if "edges" in obj["graph"]:
            node_id_set = {o["id"] for o in obj["graph"]["nodes"]}
            filtered_edges = [o for o in obj["graph"]["edges"] if o["source"] != o["target"] and o["source"] in node_id_set and o["target"] in node_id_set]
            obj["graph"]["edges"] = sorted(filtered_edges, key=lambda x: x.get("weight", 0), reverse=True)[:128]
    return True, obj


def delete_knowledge_graph(dataset_id: str, tenant_id: str):
    """
    Delete knowledge graph for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."
    _, kb = KnowledgebaseService.get_by_id(dataset_id)
    from rag.nlp import search
    from rag.graphrag.phase_markers import clear_phase_markers
    settings.docStoreConn.delete({"knowledge_graph_kwd": ["graph", "subgraph", "entity", "relation", "community_report"]},
                                 search.index_name(kb.tenant_id), dataset_id)
    # Wiping the graph invalidates any phase-completion markers used to
    # short-circuit resolution / community detection on resume.
    clear_phase_markers(dataset_id)
    KnowledgebaseService.update_by_id(
        kb.id,
        {"graphrag_task_id": "", "graphrag_task_finish_at": None},
    )

    return True, True


def run_index(dataset_id: str, tenant_id: str, index_type: str):
    """
    Run an indexing task (graph/raptor/mindmap) for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param index_type: one of "graph", "raptor", "mindmap"
    :return: (success, result) or (success, error_message)
    """
    if index_type not in _VALID_INDEX_TYPES:
        return False, f"Invalid index type '{index_type}'. Must be one of {sorted(_VALID_INDEX_TYPES)}"

    if not dataset_id:
        return False, 'Lack of "Dataset ID"'
    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    task_type = _INDEX_TYPE_TO_TASK_TYPE[index_type]
    task_id_field = _INDEX_TYPE_TO_TASK_ID_FIELD[index_type]
    display_name = _INDEX_TYPE_TO_DISPLAY_NAME[index_type]

    existing_task_id = getattr(kb, task_id_field, None)
    if existing_task_id:
        ok, task = TaskService.get_by_id(existing_task_id)
        if not ok:
            logging.warning(f"A valid {display_name} task id is expected for Dataset {dataset_id}")

        if task and task.progress not in [-1, 1]:
            return False, f"Task {existing_task_id} in progress with status {task.progress}. A {display_name} Task is already running."

    documents, _ = DocumentService.get_by_kb_id(
        kb_id=dataset_id,
        page_number=0,
        items_per_page=0,
        orderby="create_time",
        desc=False,
        keywords="",
        run_status=[],
        types=[],
        suffix=[],
    )
    if not documents:
        return False, f"No documents in Dataset {dataset_id}"

    sample_document = documents[0]
    document_ids = [document["id"] for document in documents]

    task_id = queue_raptor_o_graphrag_tasks(sample_doc=sample_document, ty=task_type, priority=0, fake_doc_id=GRAPH_RAPTOR_FAKE_DOC_ID, doc_ids=list(document_ids))

    if not KnowledgebaseService.update_by_id(kb.id, {task_id_field: task_id}):
        logging.warning(f"Cannot save {task_id_field} for Dataset {dataset_id}")

    return True, {"task_id": task_id}


def trace_index(dataset_id: str, tenant_id: str, index_type: str):
    """
    Trace an indexing task (graph/raptor/mindmap) for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param index_type: one of "graph", "raptor", "mindmap"
    :return: (success, result) or (success, error_message)
    """
    if index_type not in _VALID_INDEX_TYPES:
        return False, f"Invalid index type '{index_type}'. Must be one of {sorted(_VALID_INDEX_TYPES)}"

    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    task_id_field = _INDEX_TYPE_TO_TASK_ID_FIELD[index_type]
    task_id = getattr(kb, task_id_field, None)
    if not task_id:
        return True, {}

    ok, task = TaskService.get_by_id(task_id)
    if not ok:
        return True, {}

    return True, task.to_dict()


def list_tags(dataset_id: str, tenant_id: str):
    """
    List tags for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    tenants = UserTenantService.get_tenants_by_user_id(tenant_id)
    tags = []
    for tenant in tenants:
        tags += settings.retriever.all_tags(tenant["tenant_id"], [dataset_id])
    return True, tags


def aggregate_tags(dataset_ids: list[str], tenant_id: str):
    """
    Aggregate tags across multiple datasets.

    :param dataset_ids: list of dataset IDs
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not dataset_ids:
        return False, 'Lack of "dataset_ids"'

    for dataset_id in dataset_ids:
        if not KnowledgebaseService.accessible(dataset_id, tenant_id):
            return False, f"No authorization for dataset '{dataset_id}'"

    dataset_ids_by_tenant = {}
    for dataset_id in dataset_ids:
        ok, kb = KnowledgebaseService.get_by_id(dataset_id)
        if not ok:
            return False, f"Invalid Dataset ID '{dataset_id}'"
        dataset_ids_by_tenant.setdefault(kb.tenant_id, []).append(dataset_id)

    merged = {}
    for kb_tenant_id, kb_ids in dataset_ids_by_tenant.items():
        for tag, count in settings.retriever.all_tags(kb_tenant_id, kb_ids):
            merged[tag] = merged.get(tag, 0) + count

    return True, [{"value": tag, "count": count} for tag, count in merged.items()]


def get_flattened_metadata(dataset_ids: list[str], tenant_id: str):
    """
    Get flattened metadata for datasets.

    :param dataset_ids: list of dataset IDs
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not dataset_ids:
        return False, 'Lack of "dataset_ids"'

    for dataset_id in dataset_ids:
        if not KnowledgebaseService.accessible(dataset_id, tenant_id):
            return False, f"No authorization for dataset '{dataset_id}'"

    from api.db.services.doc_metadata_service import DocMetadataService

    return True, DocMetadataService.get_flatted_meta_by_kbs(dataset_ids)


def get_auto_metadata(dataset_id: str, tenant_id: str):
    """
    Get auto-metadata configuration for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    kb = KnowledgebaseService.get_or_none(id=dataset_id, tenant_id=tenant_id)
    if kb is None:
        return False, f"User '{tenant_id}' lacks permission for dataset '{dataset_id}'"
    parser_cfg = kb.parser_config or {}
    return True, {"metadata": parser_cfg.get("metadata") or [], "built_in_metadata": parser_cfg.get("built_in_metadata") or []}


async def update_auto_metadata(dataset_id: str, tenant_id: str, cfg: dict):
    """
    Update auto-metadata configuration for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param cfg: auto-metadata configuration
    :return: (success, result) or (success, error_message)
    """
    kb = KnowledgebaseService.get_or_none(id=dataset_id, tenant_id=tenant_id)
    if kb is None:
        return False, f"User '{tenant_id}' lacks permission for dataset '{dataset_id}'"

    parser_cfg = kb.parser_config or {}
    parser_cfg["metadata"] = cfg.get("metadata")
    parser_cfg["built_in_metadata"] = cfg.get("built_in_metadata")

    if not KnowledgebaseService.update_by_id(kb.id, {"parser_config": parser_cfg}):
        return False, "Update auto-metadata error.(Database error)"

    return True, cfg


def delete_tags(dataset_id: str, tenant_id: str, tags: list[str]):
    """
    Delete tags from a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param tags: list of tags to delete
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    from rag.nlp import search

    for t in tags:
        settings.docStoreConn.update({"tag_kwd": t, "kb_id": [dataset_id]}, {"remove": {"tag_kwd": t}}, search.index_name(kb.tenant_id), dataset_id)

    return True, {}


def list_ingestion_logs(
    dataset_id: str,
    tenant_id: str,
    page: int,
    page_size: int,
    orderby: str,
    desc: bool,
    operation_status: list = None,
    create_date_from: str = None,
    create_date_to: str = None,
    log_type: str = "dataset",
    keywords: str = None,
):
    """
    List ingestion logs for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param page: page number
    :param page_size: items per page
    :param orderby: order by field
    :param desc: descending order
    :param operation_status: filter by operation status
    :param create_date_from: filter start date
    :param create_date_to: filter end date
    :param log_type: "dataset" or "file"
    :param keywords: search keywords for file logs
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    from api.db.services.pipeline_operation_log_service import PipelineOperationLogService

    allowed_log_types = {"dataset", "file"}
    if log_type not in allowed_log_types:
        logging.warning(
            "list_ingestion_logs invalid log_type: dataset_id=%s tenant_id=%s log_type=%s",
            dataset_id,
            tenant_id,
            log_type,
        )
        return False, 'Invalid "log_type", expected "dataset" or "file"'

    logging.info(
        "list_ingestion_logs: dataset_id=%s tenant_id=%s log_type=%s page=%s page_size=%s",
        dataset_id,
        tenant_id,
        log_type,
        page,
        page_size,
    )

    if log_type == "file":
        logs, total = PipelineOperationLogService.get_file_logs_by_kb_id(dataset_id, page, page_size, orderby, desc, keywords, operation_status or [], None, None, create_date_from, create_date_to)
    else:
        logs, total = PipelineOperationLogService.get_dataset_logs_by_kb_id(dataset_id, page, page_size, orderby, desc, operation_status or [], create_date_from, create_date_to, keywords)
    return True, {"total": total, "logs": logs}


def get_ingestion_log(dataset_id: str, tenant_id: str, log_id: str):
    """
    Get a single ingestion log.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param log_id: log ID
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    from api.db.services.pipeline_operation_log_service import PipelineOperationLogService

    fields = PipelineOperationLogService.get_dataset_logs_fields()
    log = PipelineOperationLogService.model.select(*fields).where((PipelineOperationLogService.model.id == log_id) & (PipelineOperationLogService.model.kb_id == dataset_id)).first()
    if not log:
        return False, "Log not found"

    return True, log.to_dict()


def delete_index(dataset_id: str, tenant_id: str, index_type: str, wipe: bool = True):
    """
    Delete an indexing task (graph/raptor/mindmap) for a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param index_type: one of "graph", "raptor", "mindmap"
    :param wipe: when True (default) the persisted artefacts (graph rows,
        raptor summaries) are removed from the doc store and any GraphRAG
        phase-completion markers are cleared.  Pass False to cancel the
        running task while keeping prior progress so it can be resumed.
    :return: (success, result) or (success, error_message)
    """
    if index_type not in _VALID_INDEX_TYPES:
        return False, f"Invalid index type '{index_type}'. Must be one of {sorted(_VALID_INDEX_TYPES)}"

    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    task_id_field = _INDEX_TYPE_TO_TASK_ID_FIELD[index_type]
    task_finish_at_field = f"{task_id_field.replace('_task_id', '_task_finish_at')}"
    task_id = getattr(kb, task_id_field, None)

    logging.info("delete_index: dataset=%s index_type=%s wipe=%s", dataset_id, index_type, wipe)

    if task_id:
        from rag.utils.redis_conn import REDIS_CONN

        try:
            REDIS_CONN.set(f"{task_id}-cancel", "x")
        except Exception as e:
            logging.exception(e)
        TaskService.delete_by_id(task_id)

    if wipe and index_type == "graph":
        from rag.nlp import search
        from rag.graphrag.phase_markers import clear_phase_markers
        settings.docStoreConn.delete({"knowledge_graph_kwd": ["graph", "subgraph", "entity", "relation", "community_report"]},
                                     search.index_name(kb.tenant_id), dataset_id)
        # Wiping the graph invalidates any phase-completion markers used to
        # short-circuit resolution / community detection on resume.
        clear_phase_markers(dataset_id)
        logging.info("delete_index: cleared GraphRAG artefacts and phase markers for dataset=%s", dataset_id)
    elif wipe and index_type == "raptor":
        from rag.nlp import search

        settings.docStoreConn.delete({"raptor_kwd": ["raptor"]}, search.index_name(kb.tenant_id), dataset_id)

    KnowledgebaseService.update_by_id(kb.id, {task_id_field: "", task_finish_at_field: None})
    return True, {}


def run_embedding(dataset_id: str, tenant_id: str):
    """
    Run embedding for all documents in a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    documents, _ = DocumentService.get_by_kb_id(
        kb_id=dataset_id,
        page_number=0,
        items_per_page=0,
        orderby="create_time",
        desc=False,
        keywords="",
        run_status=[],
        types=[],
        suffix=[],
    )
    if not documents:
        return False, f"No documents in Dataset {dataset_id}"

    kb_table_num_map = {}
    for doc in documents:
        doc["tenant_id"] = tenant_id
        DocumentService.run(tenant_id, doc, kb_table_num_map)

    return True, {"scheduled_count": len(documents)}


def rename_tag(dataset_id: str, tenant_id: str, from_tag: str, to_tag: str):
    """
    Rename a tag in a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param from_tag: original tag name
    :param to_tag: new tag name
    :return: (success, result) or (success, error_message)
    """
    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    from rag.nlp import search

    settings.docStoreConn.update({"tag_kwd": from_tag, "kb_id": [dataset_id]}, {"remove": {"tag_kwd": from_tag.strip()}, "add": {"tag_kwd": to_tag}}, search.index_name(kb.tenant_id), dataset_id)

    return True, {"from": from_tag, "to": to_tag}


async def search(dataset_id: str, tenant_id: str, req: dict):
    """
    Search (retrieval test) within a dataset.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param req: search request
    :return: (success, result) or (success, error_message)
    """
    from api.db.joint_services.tenant_model_service import (
        get_model_config_by_id,
        get_model_config_by_type_and_name,
        get_tenant_default_model_by_type,
    )
    from api.db.services.doc_metadata_service import DocMetadataService
    from api.db.services.llm_service import LLMBundle
    from api.db.services.search_service import SearchService
    from api.db.services.user_service import UserTenantService
    from common.constants import LLMType
    from common.metadata_utils import apply_meta_data_filter
    from rag.app.tag import label_question
    from rag.prompts.generator import cross_languages, keyword_extraction

    logging.debug(
        "search(dataset=%s, tenant=%s, question_len=%s)",
        dataset_id,
        tenant_id,
        len(req.get("question", "")),
    )

    page = int(req.get("page", 1))
    size = int(req.get("size", 30))
    question = req.get("question", "")
    doc_ids = req.get("doc_ids", [])
    use_kg = req.get("use_kg", False)
    similarity_threshold = float(req.get("similarity_threshold", 0.0))
    vector_similarity_weight = float(req.get("vector_similarity_weight", 0.3))
    top = max(1, min(int(req.get("top_k", 1024)), 2048))
    langs = req.get("cross_languages", [])

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        logging.warning("search access denied: dataset=%s tenant=%s", dataset_id, tenant_id)
        return False, "Only owner of dataset authorized for this operation."

    e, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not e:
        logging.warning("search dataset not found: dataset=%s", dataset_id)
        return False, "Dataset not found!"

    if doc_ids is not None and not isinstance(doc_ids, list):
        return False, "`doc_ids` should be a list"
    local_doc_ids = list(doc_ids) if doc_ids else []

    meta_data_filter = {}
    search_id = req.get("search_id", "")
    search_config = {}
    chat_mdl = None
    if search_id:
        search_detail = SearchService.get_detail(search_id)
        if not search_detail:
            logging.warning("search config not found: search_id=%s", search_id)
            return False, "Invalid search_id"
        search_config = search_detail.get("search_config", {})
        meta_data_filter = search_config.get("meta_data_filter", {})
        similarity_threshold = float(search_config.get("similarity_threshold", similarity_threshold))
        vector_similarity_weight = float(search_config.get("vector_similarity_weight", vector_similarity_weight))
        top = max(1, min(int(search_config.get("top_k", top)), 2048))
        use_kg = search_config.get("use_kg", use_kg)
        langs = search_config.get("cross_languages", langs)
        logging.debug(
            "Dataset search loaded Search config: search_id=%s dataset_id=%s "
            "vector_similarity_weight=%s full_text_weight=%s similarity_threshold=%s top_k=%s",
            search_id,
            dataset_id,
            vector_similarity_weight,
            1 - vector_similarity_weight,
            similarity_threshold,
            top,
        )
        if meta_data_filter.get("method") in ["auto", "semi_auto"]:
            chat_id = search_config.get("chat_id", "")
            if chat_id:
                chat_model_config = get_model_config_by_type_and_name(tenant_id, LLMType.CHAT, search_config["chat_id"])
            else:
                chat_model_config = get_tenant_default_model_by_type(tenant_id, LLMType.CHAT)
            chat_mdl = LLMBundle(tenant_id, chat_model_config)
    else:
        meta_data_filter = req.get("meta_data_filter") or {}
        if meta_data_filter.get("method") in ["auto", "semi_auto"]:
            chat_model_config = get_tenant_default_model_by_type(tenant_id, LLMType.CHAT)
            chat_mdl = LLMBundle(tenant_id, chat_model_config)

    if meta_data_filter:
        local_doc_ids = await apply_meta_data_filter(
            meta_data_filter,
            None,
            question,
            chat_mdl,
            local_doc_ids,
            kb_ids=[dataset_id],
            metas_loader=lambda: DocMetadataService.get_flatted_meta_by_kbs([dataset_id]),
        )

    tenant_ids = []
    tenants = UserTenantService.query(user_id=tenant_id)
    for tenant in tenants:
        if KnowledgebaseService.query(tenant_id=tenant.tenant_id, id=dataset_id):
            tenant_ids.append(tenant.tenant_id)
            break
    else:
        return False, "Only owner of dataset authorized for this operation."

    _question = question
    if langs:
        _question = await cross_languages(kb.tenant_id, None, _question, langs)
    if kb.tenant_embd_id:
        embd_model_config = get_model_config_by_id(kb.tenant_embd_id)
    elif kb.embd_id:
        embd_model_config = get_model_config_by_type_and_name(kb.tenant_id, LLMType.EMBEDDING, kb.embd_id)
    else:
        embd_model_config = get_tenant_default_model_by_type(kb.tenant_id, LLMType.EMBEDDING)
    embd_mdl = LLMBundle(kb.tenant_id, embd_model_config)

    rerank_mdl = None
    if req.get("tenant_rerank_id"):
        allowed_rerank_tenant_ids = {tenant_id, kb.tenant_id}
        rerank_model_config = get_model_config_by_id(
            req["tenant_rerank_id"],
            allowed_tenant_ids=allowed_rerank_tenant_ids,
            requester_tenant_id=tenant_id,
        )
        rerank_mdl = LLMBundle(kb.tenant_id, rerank_model_config)
    else:
        rerank_id = search_config.get("rerank_id") or req.get("rerank_id")
        if rerank_id:
            rerank_model_config = get_model_config_by_type_and_name(kb.tenant_id, LLMType.RERANK.value, rerank_id)
            rerank_mdl = LLMBundle(kb.tenant_id, rerank_model_config)

    if search_config.get("keyword", req.get("keyword", False)):
        default_chat_model_config = get_tenant_default_model_by_type(kb.tenant_id, LLMType.CHAT)
        chat_mdl = LLMBundle(kb.tenant_id, default_chat_model_config)
        _question += await keyword_extraction(chat_mdl, _question)

    labels = label_question(_question, [kb])
    ranks = await settings.retriever.retrieval(
        _question,
        embd_mdl,
        tenant_ids,
        [dataset_id],
        page,
        size,
        similarity_threshold,
        vector_similarity_weight,
        doc_ids=local_doc_ids,
        top=top,
        rerank_mdl=rerank_mdl,
        rank_feature=labels,
        trace_id=search_id,
    )

    if use_kg:
        try:
            default_chat_model_config = get_tenant_default_model_by_type(tenant_id, LLMType.CHAT)
            ck = await settings.kg_retriever.retrieval(_question, tenant_ids, [dataset_id], embd_mdl, LLMBundle(kb.tenant_id, default_chat_model_config))
            if ck["content_with_weight"]:
                ranks["chunks"].insert(0, ck)
        except Exception:
            logging.warning("search KG retrieval failed: dataset=%s tenant=%s", dataset_id, tenant_id, exc_info=True)
    total = ranks.get("total", 0)
    ranks["chunks"] = settings.retriever.retrieval_by_children(ranks["chunks"], tenant_ids)
    ranks["total"] = total

    for c in ranks["chunks"]:
        c.pop("vector", None)
    ranks["labels"] = labels

    return True, ranks


def check_embedding(dataset_id: str, tenant_id: str, req: dict):
    """
    Check embedding model compatibility by sampling random chunks,
    re-embedding them with the new model, and computing cosine similarity.

    :param dataset_id: dataset ID
    :param tenant_id: tenant ID
    :param req: request body with embd_id
    :return: (success, result) or (success, error_message)
    """
    import random

    import numpy as np
    from common.constants import RetCode
    from common.doc_store.doc_store_base import OrderByExpr
    from rag.nlp import search

    from api.db.joint_services.tenant_model_service import (
        get_model_config_by_type_and_name,
    )
    from api.db.services.llm_service import LLMBundle
    from common.constants import LLMType

    def _guess_vec_field(src: dict):
        for k in src or {}:
            if k.endswith("_vec"):
                return k
        return None

    def _as_float_vec(v):
        if v is None:
            return []
        if isinstance(v, str):
            return [float(x) for x in v.split("\t") if x != ""]
        if isinstance(v, (list, tuple, np.ndarray)):
            return [float(x) for x in v]
        return []

    def _to_1d(x):
        a = np.asarray(x, dtype=np.float32)
        return a.reshape(-1)

    def _cos_sim(a, b, eps=1e-12):
        a = _to_1d(a)
        b = _to_1d(b)
        na = np.linalg.norm(a)
        nb = np.linalg.norm(b)
        if na < eps or nb < eps:
            return 0.0
        return float(np.dot(a, b) / (na * nb))

    def sample_random_chunks_with_vectors(
        docStoreConn,
        tenant_id: str,
        kb_id: str,
        n: int = 5,
        base_fields=("docnm_kwd", "doc_id", "content_with_weight", "page_num_int", "position_int", "top_int"),
    ):
        index_nm = search.index_name(tenant_id)

        res0 = docStoreConn.search(
            select_fields=[], highlight_fields=[],
            condition={"kb_id": kb_id, "available_int": 1},
            match_expressions=[], order_by=OrderByExpr(),
            offset=0, limit=1,
            index_names=index_nm, knowledgebase_ids=[kb_id],
        )
        total = docStoreConn.get_total(res0)
        if total <= 0:
            return []

        n = min(n, total)
        offsets = sorted(random.sample(range(min(total, 1000)), n))
        out = []

        for off in offsets:
            res1 = docStoreConn.search(
                select_fields=list(base_fields),
                highlight_fields=[],
                condition={"kb_id": kb_id, "available_int": 1},
                match_expressions=[], order_by=OrderByExpr(),
                offset=off, limit=1,
                index_names=index_nm, knowledgebase_ids=[kb_id],
            )
            ids = docStoreConn.get_doc_ids(res1)
            if not ids:
                continue

            cid = ids[0]
            full_doc = docStoreConn.get(cid, index_nm, [kb_id]) or {}
            vec_field = _guess_vec_field(full_doc)
            vec = _as_float_vec(full_doc.get(vec_field))

            out.append({
                "chunk_id": cid,
                "kb_id": kb_id,
                "doc_id": full_doc.get("doc_id"),
                "doc_name": full_doc.get("docnm_kwd"),
                "vector_field": vec_field,
                "vector_dim": len(vec),
                "vector": vec,
                "page_num_int": full_doc.get("page_num_int"),
                "position_int": full_doc.get("position_int"),
                "top_int": full_doc.get("top_int"),
                "content_with_weight": full_doc.get("content_with_weight") or "",
                "question_kwd": full_doc.get("question_kwd") or [],
            })
        return out

    def _clean(s: str):
        return re.sub(r"</?(table|td|caption|tr|th)( [^<>]{0,12})?>", " ", s or "").strip()

    if not dataset_id:
        return False, 'Lack of "Dataset ID"'

    if not KnowledgebaseService.accessible(dataset_id, tenant_id):
        return False, "No authorization."

    ok, kb = KnowledgebaseService.get_by_id(dataset_id)
    if not ok:
        return False, "Invalid Dataset ID"

    embd_id = req.get("embd_id", "")
    if not embd_id:
        return False, "`embd_id` is required."

    logging.info("check_embedding: dataset=%s tenant=%s embd_id=%s", dataset_id, tenant_id, embd_id)

    ok, err = verify_embedding_availability(embd_id, tenant_id)
    if not ok:
        return False, err

    embd_model_config = get_model_config_by_type_and_name(kb.tenant_id, LLMType.EMBEDDING, embd_id)
    emb_mdl = LLMBundle(kb.tenant_id, embd_model_config)

    n = int(req.get("check_num", 5))
    samples = sample_random_chunks_with_vectors(settings.docStoreConn, tenant_id=kb.tenant_id, kb_id=dataset_id, n=n)
    logging.info("check_embedding: dataset=%s sampled=%d chunks", dataset_id, len(samples))

    results, eff_sims = [], []
    mode = "content_only"
    for ck in samples:
        title = ck.get("doc_name") or "Title"

        txt_in = "\n".join(ck.get("question_kwd") or []) or ck.get("content_with_weight") or ""
        txt_in = _clean(txt_in)
        if not txt_in:
            results.append({"chunk_id": ck["chunk_id"], "reason": "no_text"})
            continue

        if not ck.get("vector"):
            results.append({"chunk_id": ck["chunk_id"], "reason": "no_stored_vector"})
            continue

        try:
            v, _ = emb_mdl.encode([title, txt_in])
            assert len(v[1]) == len(ck["vector"]), (
                f"The dimension ({len(v[1])}) of given embedding model is different from the original ({len(ck['vector'])})"
            )
            sim_content = _cos_sim(v[1], ck["vector"])
            title_w = 0.1
            qv_mix = title_w * v[0] + (1 - title_w) * v[1]
            sim_mix = _cos_sim(qv_mix, ck["vector"])
            sim = sim_content
            mode = "content_only"
            if sim_mix > sim:
                sim = sim_mix
                mode = "title+content"
        except Exception as e:
            return False, f"Embedding failure. {e}"

        eff_sims.append(sim)
        results.append({
            "chunk_id": ck["chunk_id"],
            "doc_id": ck["doc_id"],
            "doc_name": ck["doc_name"],
            "vector_field": ck["vector_field"],
            "vector_dim": ck["vector_dim"],
            "cos_sim": round(sim, 6),
        })

    summary = {
        "kb_id": dataset_id,
        "model": embd_id,
        "sampled": len(samples),
        "valid": len(eff_sims),
        "avg_cos_sim": round(float(np.mean(eff_sims)) if eff_sims else 0.0, 6),
        "min_cos_sim": round(float(np.min(eff_sims)) if eff_sims else 0.0, 6),
        "max_cos_sim": round(float(np.max(eff_sims)) if eff_sims else 0.0, 6),
        "match_mode": mode,
    }

    data = {"summary": summary, "results": results}
    if not eff_sims:
        logging.warning("check_embedding: dataset=%s no comparable chunks", dataset_id)
        return False, "No embedded chunks are available to compare."
    if summary["avg_cos_sim"] >= 0.9:
        logging.info("check_embedding: dataset=%s compatible avg_cos_sim=%s valid=%d", dataset_id, summary["avg_cos_sim"], len(eff_sims))
        return True, data
    logging.warning("check_embedding: dataset=%s not_effective avg_cos_sim=%s valid=%d", dataset_id, summary["avg_cos_sim"], len(eff_sims))
    return "not_effective", {"code": RetCode.NOT_EFFECTIVE, "message": "Embedding model switch failed: the average similarity between old and new vectors is below 0.9, indicating incompatible vector spaces.", "data": data}


async def search_datasets(tenant_id: str, req: dict):
    """
    Search (retrieval test) across multiple datasets.

    :param tenant_id: tenant ID
    :param req: search request containing dataset_ids and other params
    :return: (success, result) or (success, error_message)
    """
    from api.db.joint_services.tenant_model_service import (
        get_model_config_by_id,
        get_model_config_by_type_and_name,
        get_tenant_default_model_by_type,
    )
    from api.db.services.doc_metadata_service import DocMetadataService
    from api.db.services.llm_service import LLMBundle
    from api.db.services.search_service import SearchService
    from api.db.services.user_service import UserTenantService
    from common.constants import LLMType
    from common.metadata_utils import apply_meta_data_filter
    from rag.app.tag import label_question
    from rag.prompts.generator import cross_languages, keyword_extraction

    kb_ids = req.get("dataset_ids", [])
    page = int(req.get("page", 1))
    size = int(req.get("size", 30))
    question = req.get("question", "")
    doc_ids = req.get("doc_ids", [])
    use_kg = req.get("use_kg", False)
    similarity_threshold = float(req.get("similarity_threshold", 0.0))
    vector_similarity_weight = float(req.get("vector_similarity_weight", 0.3))
    top = max(1, min(int(req.get("top_k", 1024)), 2048))
    langs = req.get("cross_languages", [])

    logging.debug(
        "search_datasets(datasets=%s, tenant=%s, question_len=%s)",
        kb_ids,
        tenant_id,
        len(question),
    )

    # Access check for all datasets
    for kb_id in kb_ids:
        if not KnowledgebaseService.accessible(kb_id, tenant_id):
            logging.warning("search_datasets access denied: dataset=%s tenant=%s", kb_id, tenant_id)
            return False, f"Only owner of dataset {kb_id} authorized for this operation."

    kbs = KnowledgebaseService.get_by_ids(kb_ids)
    if not kbs:
        return False, "Datasets not found!"

    # All datasets must use the same embedding model
    embd_nms = list(set([TenantLLMService.split_model_name_and_factory(kb.embd_id)[0] for kb in kbs]))
    if len(embd_nms) != 1:
        return False, "Datasets use different embedding models."

    if doc_ids is not None and not isinstance(doc_ids, list):
        return False, "`doc_ids` should be a list"
    local_doc_ids = list(doc_ids) if doc_ids else []

    meta_data_filter = {}
    search_id = req.get("search_id", "")
    search_config = {}
    chat_mdl = None
    if search_id:
        search_detail = SearchService.get_detail(search_id)
        if not search_detail:
            logging.warning("search config not found: search_id=%s", search_id)
            return False, "Invalid search_id"
        search_config = search_detail.get("search_config", {})
        meta_data_filter = search_config.get("meta_data_filter", {})
        similarity_threshold = float(search_config.get("similarity_threshold", similarity_threshold))
        vector_similarity_weight = float(search_config.get("vector_similarity_weight", vector_similarity_weight))
        top = max(1, min(int(search_config.get("top_k", top)), 2048))
        use_kg = search_config.get("use_kg", use_kg)
        langs = search_config.get("cross_languages", langs)
        logging.debug(
            "Dataset search loaded Search config: search_id=%s dataset_ids=%s "
            "vector_similarity_weight=%s full_text_weight=%s similarity_threshold=%s top_k=%s",
            search_id,
            kb_ids,
            vector_similarity_weight,
            1 - vector_similarity_weight,
            similarity_threshold,
            top,
        )
        if meta_data_filter.get("method") in ["auto", "semi_auto"]:
            chat_id = search_config.get("chat_id", "")
            if chat_id:
                chat_model_config = get_model_config_by_type_and_name(tenant_id, LLMType.CHAT, search_config["chat_id"])
            else:
                chat_model_config = get_tenant_default_model_by_type(tenant_id, LLMType.CHAT)
            chat_mdl = LLMBundle(tenant_id, chat_model_config)
    else:
        meta_data_filter = req.get("meta_data_filter") or {}
        if meta_data_filter.get("method") in ["auto", "semi_auto"]:
            chat_model_config = get_tenant_default_model_by_type(tenant_id, LLMType.CHAT)
            chat_mdl = LLMBundle(tenant_id, chat_model_config)

    if meta_data_filter:
        logging.debug(f"Metadata filter: {meta_data_filter}, question: {question}, chat_mdl={'None' if chat_mdl is None else chat_mdl.llm_name}")
        local_doc_ids = await apply_meta_data_filter(
            meta_data_filter,
            None,
            question,
            chat_mdl,
            local_doc_ids,
            kb_ids=kb_ids,
            metas_loader=lambda: DocMetadataService.get_flatted_meta_by_kbs(kb_ids),
        )

    tenant_ids = []
    tenants = UserTenantService.query(user_id=tenant_id)
    for tenant in tenants:
        if any(KnowledgebaseService.query(tenant_id=tenant.tenant_id, id=kb_id) for kb_id in kb_ids):
            tenant_ids.append(tenant.tenant_id)
            break
    else:
        return False, "Only owner of datasets authorized for this operation."

    kb = kbs[0]
    _question = question
    if langs:
        _question = await cross_languages(kb.tenant_id, None, _question, langs)
    if kb.tenant_embd_id:
        embd_model_config = get_model_config_by_id(kb.tenant_embd_id)
    elif kb.embd_id:
        embd_model_config = get_model_config_by_type_and_name(kb.tenant_id, LLMType.EMBEDDING, kb.embd_id)
    else:
        embd_model_config = get_tenant_default_model_by_type(kb.tenant_id, LLMType.EMBEDDING)
    embd_mdl = LLMBundle(kb.tenant_id, embd_model_config)

    rerank_mdl = None
    if req.get("tenant_rerank_id"):
        allowed_rerank_tenant_ids = {tenant_id, *[dataset.tenant_id for dataset in kbs]}
        rerank_model_config = get_model_config_by_id(
            req["tenant_rerank_id"],
            allowed_tenant_ids=allowed_rerank_tenant_ids,
            requester_tenant_id=tenant_id,
        )
        rerank_mdl = LLMBundle(kb.tenant_id, rerank_model_config)
    else:
        rerank_id = search_config.get("rerank_id") or req.get("rerank_id")
        if rerank_id:
            rerank_model_config = get_model_config_by_type_and_name(kb.tenant_id, LLMType.RERANK.value, rerank_id)
            rerank_mdl = LLMBundle(kb.tenant_id, rerank_model_config)

    if search_config.get("keyword", req.get("keyword", False)):
        default_chat_model_config = get_tenant_default_model_by_type(kb.tenant_id, LLMType.CHAT)
        chat_mdl = LLMBundle(kb.tenant_id, default_chat_model_config)
        _question += await keyword_extraction(chat_mdl, _question)

    labels = label_question(_question, kbs)
    ranks = await settings.retriever.retrieval(
        _question,
        embd_mdl,
        tenant_ids,
        kb_ids,
        page,
        size,
        similarity_threshold,
        vector_similarity_weight,
        doc_ids=local_doc_ids,
        top=top,
        rerank_mdl=rerank_mdl,
        rank_feature=labels,
        trace_id=search_id,
    )

    if use_kg:
        try:
            default_chat_model_config = get_tenant_default_model_by_type(tenant_id, LLMType.CHAT)
            ck = await settings.kg_retriever.retrieval(_question, tenant_ids, kb_ids, embd_mdl, LLMBundle(kb.tenant_id, default_chat_model_config))
            if ck["content_with_weight"]:
                ranks["chunks"].insert(0, ck)
        except Exception:
            logging.warning("search_datasets KG retrieval failed: datasets=%s tenant=%s", kb_ids, tenant_id, exc_info=True)
    total = ranks.get("total", 0)
    ranks["chunks"] = settings.retriever.retrieval_by_children(ranks["chunks"], tenant_ids)
    ranks["total"] = total

    for c in ranks["chunks"]:
        c.pop("vector", None)
    ranks["labels"] = labels

    return True, ranks