#
#  Copyright 2024 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 asyncio
import json
import logging
import random
import re
from concurrent.futures import ThreadPoolExecutor
from copy import deepcopy
from datetime import datetime
from io import BytesIO

import xxhash
from peewee import fn, Case, JOIN

from api.constants import IMG_BASE64_PREFIX, FILE_NAME_LEN_LIMIT
from api.db import PIPELINE_SPECIAL_PROGRESS_FREEZE_TASK_TYPES, FileType, UserTenantRole, CanvasCategory
from api.db.db_models import DB, Document, Knowledgebase, Task, Tenant, UserTenant, File2Document, File, UserCanvas, User
from api.db.db_utils import bulk_insert_into_db
from api.db.services.common_service import CommonService, retry_deadlock_operation
from api.db.services.knowledgebase_service import KnowledgebaseService
from api.db.services.doc_metadata_service import DocMetadataService
from common.misc_utils import get_uuid
from common.time_utils import current_timestamp, get_format_time
from common.constants import LLMType, ParserType, StatusEnum, TaskStatus, SVR_CONSUMER_GROUP_NAME
from rag.nlp import rag_tokenizer, search
from rag.utils.redis_conn import REDIS_CONN
from common.doc_store.doc_store_base import OrderByExpr
from common import settings


class DocumentService(CommonService):
    model = Document

    @classmethod
    def get_cls_model_fields(cls):
        return [
            cls.model.id,
            cls.model.thumbnail,
            cls.model.kb_id,
            cls.model.parser_id,
            cls.model.pipeline_id,
            cls.model.parser_config,
            cls.model.source_type,
            cls.model.type,
            cls.model.created_by,
            cls.model.name,
            cls.model.location,
            cls.model.size,
            cls.model.token_num,
            cls.model.chunk_num,
            cls.model.progress,
            cls.model.progress_msg,
            cls.model.process_begin_at,
            cls.model.process_duration,
            cls.model.suffix,
            cls.model.run,
            cls.model.status,
            cls.model.create_time,
            cls.model.create_date,
            cls.model.update_time,
            cls.model.update_date,
        ]

    @classmethod
    @DB.connection_context()
    def get_list(cls, kb_id, page_number, items_per_page, orderby, desc, keywords, id, name, suffix=None, run=None, doc_ids=None):
        fields = cls.get_cls_model_fields()
        docs = (
            cls.model.select(*[*fields, UserCanvas.title])
            .join(File2Document, on=(File2Document.document_id == cls.model.id))
            .join(File, on=(File.id == File2Document.file_id))
            .join(UserCanvas, on=((cls.model.pipeline_id == UserCanvas.id) & (UserCanvas.canvas_category == CanvasCategory.DataFlow.value)), join_type=JOIN.LEFT_OUTER)
            .where(cls.model.kb_id == kb_id)
        )
        if id:
            docs = docs.where(cls.model.id == id)
        if name:
            docs = docs.where(cls.model.name == name)
        if keywords:
            docs = docs.where(fn.LOWER(cls.model.name).contains(keywords.lower()))
        if doc_ids:
            docs = docs.where(cls.model.id.in_(doc_ids))
        if suffix:
            docs = docs.where(cls.model.suffix.in_(suffix))
        if run:
            docs = docs.where(cls.model.run.in_(run))
        if desc:
            docs = docs.order_by(cls.model.getter_by(orderby).desc())
        else:
            docs = docs.order_by(cls.model.getter_by(orderby).asc())

        count = docs.count()
        docs = docs.paginate(page_number, items_per_page)

        docs_list = list(docs.dicts())
        doc_ids_on_page = [doc["id"] for doc in docs_list]
        metadata_map = DocMetadataService.get_metadata_for_documents(doc_ids_on_page, kb_id) if doc_ids_on_page else {}
        for doc in docs_list:
            doc["meta_fields"] = metadata_map.get(doc["id"], {})
        return docs_list, count

    @classmethod
    @DB.connection_context()
    def check_doc_health(cls, tenant_id: str, filename):
        import os

        MAX_FILE_NUM_PER_USER = int(os.environ.get("MAX_FILE_NUM_PER_USER", 0))
        if 0 < MAX_FILE_NUM_PER_USER <= DocumentService.get_doc_count(tenant_id):
            raise RuntimeError("Exceed the maximum file number of a free user!")
        if len(filename.encode("utf-8")) > FILE_NAME_LEN_LIMIT:
            raise RuntimeError("Exceed the maximum length of file name!")
        return True

    @classmethod
    @DB.connection_context()
    def get_by_kb_id(cls, kb_id, page_number, items_per_page, orderby, desc, keywords, run_status, types, suffix, doc_ids=None, return_empty_metadata=False):
        fields = cls.get_cls_model_fields()
        if keywords:
            docs = (
                cls.model.select(*[*fields, UserCanvas.title.alias("pipeline_name"), User.nickname])
                .join(File2Document, on=(File2Document.document_id == cls.model.id))
                .join(File, on=(File.id == File2Document.file_id))
                .join(UserCanvas, on=(cls.model.pipeline_id == UserCanvas.id), join_type=JOIN.LEFT_OUTER)
                .join(User, on=(cls.model.created_by == User.id), join_type=JOIN.LEFT_OUTER)
                .where((cls.model.kb_id == kb_id), (fn.LOWER(cls.model.name).contains(keywords.lower())))
            )
        else:
            docs = (
                cls.model.select(*[*fields, UserCanvas.title.alias("pipeline_name"), User.nickname])
                .join(File2Document, on=(File2Document.document_id == cls.model.id))
                .join(UserCanvas, on=(cls.model.pipeline_id == UserCanvas.id), join_type=JOIN.LEFT_OUTER)
                .join(File, on=(File.id == File2Document.file_id))
                .join(User, on=(cls.model.created_by == User.id), join_type=JOIN.LEFT_OUTER)
                .where(cls.model.kb_id == kb_id)
            )

        if doc_ids:
            docs = docs.where(cls.model.id.in_(doc_ids))
        if run_status:
            docs = docs.where(cls.model.run.in_(run_status))
        if types:
            docs = docs.where(cls.model.type.in_(types))
        if suffix:
            docs = docs.where(cls.model.suffix.in_(suffix))

        metadata_map = {}
        if return_empty_metadata:
            metadata_map = DocMetadataService.get_metadata_for_documents(None, kb_id)
            doc_ids_with_metadata = set(metadata_map.keys())
            if doc_ids_with_metadata:
                docs = docs.where(cls.model.id.not_in(doc_ids_with_metadata))

        count = docs.count()
        if desc:
            docs = docs.order_by(cls.model.getter_by(orderby).desc())
        else:
            docs = docs.order_by(cls.model.getter_by(orderby).asc())

        if page_number and items_per_page:
            docs = docs.paginate(page_number, items_per_page)

        docs_list = list(docs.dicts())
        if return_empty_metadata:
            for doc in docs_list:
                doc["meta_fields"] = {}
        else:
            doc_ids_on_page = [doc["id"] for doc in docs_list]
            metadata_map = DocMetadataService.get_metadata_for_documents(doc_ids_on_page, kb_id) if doc_ids_on_page else {}
            for doc in docs_list:
                doc["meta_fields"] = metadata_map.get(doc["id"], {})
        return docs_list, count

    @classmethod
    @DB.connection_context()
    def get_filter_by_kb_id(cls, kb_id, keywords, run_status, types, suffix):
        """
        returns:
        {
            "suffix": {
                "ppt": 1,
                "doxc": 2
            },
            "run_status": {
             "1": 2,
             "2": 2
            }
            "metadata": {
                "key1": {
                 "key1_value1": 1,
                 "key1_value2": 2,
                },
                "key2": {
                 "key2_value1": 2,
                 "key2_value2": 1,
                },
            }
        }, total
        where "1" => RUNNING, "2" => CANCEL
        """
        fields = cls.get_cls_model_fields()
        if keywords:
            query = (
                cls.model.select(*fields)
                .join(File2Document, on=(File2Document.document_id == cls.model.id))
                .join(File, on=(File.id == File2Document.file_id))
                .where((cls.model.kb_id == kb_id), (fn.LOWER(cls.model.name).contains(keywords.lower())))
            )
        else:
            query = cls.model.select(*fields).join(File2Document, on=(File2Document.document_id == cls.model.id)).join(File, on=(File.id == File2Document.file_id)).where(cls.model.kb_id == kb_id)

        if run_status:
            query = query.where(cls.model.run.in_(run_status))
        if types:
            query = query.where(cls.model.type.in_(types))
        if suffix:
            query = query.where(cls.model.suffix.in_(suffix))

        rows = query.select(cls.model.run, cls.model.suffix, cls.model.id)
        total = rows.count()

        suffix_counter = {}
        run_status_counter = {}
        metadata_counter = {}
        empty_metadata_count = 0

        doc_ids = [row.id for row in rows]
        metadata = {}
        if doc_ids:
            try:
                metadata = DocMetadataService.get_metadata_for_documents(doc_ids, kb_id)
            except Exception as e:
                logging.warning(f"Failed to fetch metadata from ES/Infinity: {e}")

        for row in rows:
            suffix_counter[row.suffix] = suffix_counter.get(row.suffix, 0) + 1
            run_status_counter[str(row.run)] = run_status_counter.get(str(row.run), 0) + 1
            meta_fields = metadata.get(row.id, {})
            if not meta_fields:
                empty_metadata_count += 1
                continue
            has_valid_meta = False
            for key, value in meta_fields.items():
                values = value if isinstance(value, list) else [value]
                for vv in values:
                    if vv is None:
                        continue
                    if isinstance(vv, str) and not vv.strip():
                        continue
                    sv = str(vv)
                    if key not in metadata_counter:
                        metadata_counter[key] = {}
                    metadata_counter[key][sv] = metadata_counter[key].get(sv, 0) + 1
                    has_valid_meta = True
            if not has_valid_meta:
                empty_metadata_count += 1

        metadata_counter["empty_metadata"] = {"true": empty_metadata_count}
        return {
            "suffix": suffix_counter,
            "run_status": run_status_counter,
            "metadata": metadata_counter,
        }, total

    @classmethod
    @DB.connection_context()
    def get_parsing_status_by_kb_ids(cls, kb_ids: list[str]) -> dict[str, dict[str, int]]:
        """Return aggregated document parsing status counts grouped by dataset (kb_id).

        For each kb_id, counts documents in each run-status bucket:
            - unstart_count  (run == "0")
            - running_count   (run == "1")
            - cancel_count    (run == "2")
            - done_count      (run == "3")
            - fail_count      (run == "4")

        Returns a dict keyed by kb_id, e.g.
            {"kb-abc": {"unstart_count": 10, "running_count": 2, ...}, ...}
        """
        if not kb_ids:
            return {}

        status_field_map = {
            TaskStatus.UNSTART.value: "unstart_count",
            TaskStatus.RUNNING.value: "running_count",
            TaskStatus.CANCEL.value: "cancel_count",
            TaskStatus.DONE.value: "done_count",
            TaskStatus.FAIL.value: "fail_count",
        }

        empty_status = {v: 0 for v in status_field_map.values()}
        result: dict[str, dict[str, int]] = {kb_id: dict(empty_status) for kb_id in kb_ids}

        rows = (
            cls.model.select(
                cls.model.kb_id,
                cls.model.run,
                fn.COUNT(cls.model.id).alias("cnt"),
            )
            .where(cls.model.kb_id.in_(kb_ids))
            .group_by(cls.model.kb_id, cls.model.run)
            .dicts()
        )

        for row in rows:
            kb_id = row["kb_id"]
            run_val = str(row["run"])
            field_name = status_field_map.get(run_val)
            if field_name and kb_id in result:
                result[kb_id][field_name] = int(row["cnt"])

        return result

    @classmethod
    @DB.connection_context()
    def count_by_kb_id(cls, kb_id, keywords, run_status, types):
        if keywords:
            docs = cls.model.select().where((cls.model.kb_id == kb_id), (fn.LOWER(cls.model.name).contains(keywords.lower())))
        else:
            docs = cls.model.select().where(cls.model.kb_id == kb_id)

        if run_status:
            docs = docs.where(cls.model.run.in_(run_status))
        if types:
            docs = docs.where(cls.model.type.in_(types))

        count = docs.count()

        return count

    @classmethod
    @DB.connection_context()
    def get_total_size_by_kb_id(cls, kb_id, keywords="", run_status=[], types=[]):
        query = cls.model.select(fn.COALESCE(fn.SUM(cls.model.size), 0)).where(cls.model.kb_id == kb_id)

        if keywords:
            query = query.where(fn.LOWER(cls.model.name).contains(keywords.lower()))
        if run_status:
            query = query.where(cls.model.run.in_(run_status))
        if types:
            query = query.where(cls.model.type.in_(types))

        return int(query.scalar()) or 0

    @classmethod
    @DB.connection_context()
    def get_all_doc_ids_by_kb_ids(cls, kb_ids):
        fields = [cls.model.id, cls.model.kb_id]
        docs = cls.model.select(*fields).where(cls.model.kb_id.in_(kb_ids))
        docs.order_by(cls.model.create_time.asc())
        # maybe cause slow query by deep paginate, optimize later
        offset, limit = 0, 100
        res = []
        while True:
            doc_batch = docs.offset(offset).limit(limit)
            _temp = list(doc_batch.dicts())
            if not _temp:
                break
            res.extend(_temp)
            offset += limit
        return res

    @classmethod
    @DB.connection_context()
    def get_all_docs_by_creator_id(cls, creator_id):
        fields = [cls.model.id, cls.model.kb_id, cls.model.token_num, cls.model.chunk_num, Knowledgebase.tenant_id]
        docs = cls.model.select(*fields).join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id)).where(cls.model.created_by == creator_id)
        docs.order_by(cls.model.create_time.asc())
        # maybe cause slow query by deep paginate, optimize later
        offset, limit = 0, 100
        res = []
        while True:
            doc_batch = docs.offset(offset).limit(limit)
            _temp = list(doc_batch.dicts())
            if not _temp:
                break
            res.extend(_temp)
            offset += limit
        return res

    @classmethod
    @DB.connection_context()
    def insert(cls, doc):
        if not cls.save(**doc):
            raise RuntimeError("Database error (Document)!")
        if not KnowledgebaseService.atomic_increase_doc_num_by_id(doc["kb_id"]):
            raise RuntimeError("Database error (Knowledgebase)!")
        return Document(**doc)

    @classmethod
    @DB.connection_context()
    def remove_document(cls, doc, tenant_id):
        from api.db.services.task_service import TaskService, cancel_all_task_of

        if not cls.delete_document_and_update_kb_counts(doc.id):
            return True

        # Cancel all running tasks first Using preset function in task_service.py ---  set cancel flag in Redis
        try:
            cancel_all_task_of(doc.id)
            logging.info(f"Cancelled all tasks for document {doc.id}")
        except Exception as e:
            logging.warning(f"Failed to cancel tasks for document {doc.id}: {e}")

        # Delete tasks from database
        try:
            TaskService.filter_delete([Task.doc_id == doc.id])
        except Exception as e:
            logging.warning(f"Failed to delete tasks for document {doc.id}: {e}")

        # Delete chunk images (non-critical, log and continue)
        try:
            cls.delete_chunk_images(doc, tenant_id)
        except Exception as e:
            logging.warning(f"Failed to delete chunk images for document {doc.id}: {e}")

        # Delete thumbnail (non-critical, log and continue)
        try:
            if doc.thumbnail and not doc.thumbnail.startswith(IMG_BASE64_PREFIX):
                if settings.STORAGE_IMPL.obj_exist(doc.kb_id, doc.thumbnail):
                    settings.STORAGE_IMPL.rm(doc.kb_id, doc.thumbnail)
        except Exception as e:
            logging.warning(f"Failed to delete thumbnail for document {doc.id}: {e}")

        # Delete chunks from doc store - this is critical, log errors
        try:
            settings.docStoreConn.delete({"doc_id": doc.id}, search.index_name(tenant_id), doc.kb_id)
        except Exception as e:
            logging.error(f"Failed to delete chunks from doc store for document {doc.id}: {e}")

        # Delete document metadata (non-critical, log and continue)
        try:
            DocMetadataService.delete_document_metadata(doc.id, doc.kb_id, tenant_id)
        except Exception as e:
            logging.warning(f"Failed to delete metadata for document {doc.id}: {e}")

        # Cleanup knowledge graph references (non-critical, log and continue)
        try:
            graph_source = settings.docStoreConn.get_fields(
                settings.docStoreConn.search(["source_id"], [], {"kb_id": doc.kb_id, "knowledge_graph_kwd": ["graph"]}, [], OrderByExpr(), 0, 1, search.index_name(tenant_id), [doc.kb_id]),
                ["source_id"],
            )
            if len(graph_source) > 0 and doc.id in list(graph_source.values())[0]["source_id"]:
                settings.docStoreConn.update(
                    {"kb_id": doc.kb_id, "knowledge_graph_kwd": ["entity", "relation", "graph", "subgraph", "community_report"], "source_id": doc.id},
                    {"remove": {"source_id": doc.id}},
                    search.index_name(tenant_id),
                    doc.kb_id,
                )
                settings.docStoreConn.update({"kb_id": doc.kb_id, "knowledge_graph_kwd": ["graph"]}, {"removed_kwd": "Y"}, search.index_name(tenant_id), doc.kb_id)
                settings.docStoreConn.delete(
                    {"kb_id": doc.kb_id, "knowledge_graph_kwd": ["entity", "relation", "graph", "subgraph", "community_report"], "must_not": {"exists": "source_id"}},
                    search.index_name(tenant_id),
                    doc.kb_id,
                )
        except Exception as e:
            logging.warning(f"Failed to cleanup knowledge graph for document {doc.id}: {e}")

        return True

    @classmethod
    @DB.connection_context()
    def delete_chunk_images(cls, doc, tenant_id):
        page = 0
        page_size = 1000
        while True:
            chunks = settings.docStoreConn.search(["img_id"], [], {"doc_id": doc.id}, [], OrderByExpr(), page * page_size, page_size, search.index_name(tenant_id), [doc.kb_id])
            chunk_ids = settings.docStoreConn.get_doc_ids(chunks)
            if not chunk_ids:
                break
            for cid in chunk_ids:
                if settings.STORAGE_IMPL.obj_exist(doc.kb_id, cid):
                    settings.STORAGE_IMPL.rm(doc.kb_id, cid)
            page += 1

    @classmethod
    @DB.connection_context()
    def get_newly_uploaded(cls):
        fields = [
            cls.model.id,
            cls.model.kb_id,
            cls.model.parser_id,
            cls.model.parser_config,
            cls.model.name,
            cls.model.type,
            cls.model.location,
            cls.model.size,
            Knowledgebase.tenant_id,
            Tenant.embd_id,
            Tenant.img2txt_id,
            Tenant.asr_id,
            cls.model.update_time,
        ]
        docs = (
            cls.model.select(*fields)
            .join(Knowledgebase, on=(cls.model.kb_id == Knowledgebase.id))
            .join(Tenant, on=(Knowledgebase.tenant_id == Tenant.id))
            .where(
                cls.model.status == StatusEnum.VALID.value,
                ~(cls.model.type == FileType.VIRTUAL.value),
                cls.model.progress == 0,
                cls.model.update_time >= current_timestamp() - 1000 * 600,
                cls.model.run == TaskStatus.RUNNING.value,
            )
            .order_by(cls.model.update_time.asc())
        )
        return list(docs.dicts())

    @classmethod
    @DB.connection_context()
    def get_unfinished_docs(cls):
        fields = [cls.model.id, cls.model.process_begin_at, cls.model.parser_config, cls.model.progress_msg,
                  cls.model.run, cls.model.parser_id]
        unfinished_task_query = Task.select(Task.doc_id).where(
            (Task.progress >= 0) & (Task.progress < 1)
        )
        docs_with_non_failed_tasks = Task.select(Task.doc_id).where(Task.progress >= 0).distinct()

        docs = cls.model.select(*fields).where(
            cls.model.status == StatusEnum.VALID.value,
            ~(cls.model.type == FileType.VIRTUAL.value),
            ((cls.model.run.is_null(True)) | (cls.model.run != TaskStatus.CANCEL.value)),
            (((cls.model.progress < 1) & (cls.model.progress > 0)) |
             (cls.model.id.in_(unfinished_task_query)) |
             ((cls.model.progress == -1) & (cls.model.run == TaskStatus.FAIL.value) &
              (cls.model.id.in_(docs_with_non_failed_tasks)))))  # including GraphRAG/RAPTOR/Mindmap; re-sync failed docs
        return list(docs.dicts())

    @classmethod
    @DB.connection_context()
    def increment_chunk_num(cls, doc_id, kb_id, token_num, chunk_num, duration):
        num = (
            cls.model.update(token_num=cls.model.token_num + token_num, chunk_num=cls.model.chunk_num + chunk_num, process_duration=cls.model.process_duration + duration)
            .where(cls.model.id == doc_id)
            .execute()
        )
        if num == 0:
            logging.warning("Document not found which is supposed to be there")
        num = Knowledgebase.update(token_num=Knowledgebase.token_num + token_num, chunk_num=Knowledgebase.chunk_num + chunk_num).where(Knowledgebase.id == kb_id).execute()
        return num

    @classmethod
    @DB.connection_context()
    def decrement_chunk_num(cls, doc_id, kb_id, token_num, chunk_num, duration):
        num = (
            cls.model.update(token_num=cls.model.token_num - token_num, chunk_num=cls.model.chunk_num - chunk_num, process_duration=cls.model.process_duration + duration)
            .where(cls.model.id == doc_id)
            .execute()
        )
        if num == 0:
            raise LookupError("Document not found which is supposed to be there")
        num = Knowledgebase.update(token_num=Knowledgebase.token_num - token_num, chunk_num=Knowledgebase.chunk_num - chunk_num).where(Knowledgebase.id == kb_id).execute()
        return num

    @classmethod
    @retry_deadlock_operation()
    @DB.connection_context()
    def delete_document_and_update_kb_counts(cls, doc_id) -> bool:
        """Atomically delete the document row and update KB counters.

        Returns True if the document was deleted by this call, False if it was
        already deleted by a concurrent request (idempotent).
        """
        with DB.atomic():
            doc = (
                cls.model.select(
                    cls.model.id,
                    cls.model.kb_id,
                    cls.model.token_num,
                    cls.model.chunk_num,
                )
                .where(cls.model.id == doc_id)
                .for_update()
                .get_or_none()
            )
            if doc is None:
                return False
            deleted = cls.model.delete().where(cls.model.id == doc_id).execute()
            if not deleted:
                return False
            Knowledgebase.update(
                token_num=Knowledgebase.token_num - doc.token_num,
                chunk_num=Knowledgebase.chunk_num - doc.chunk_num,
                doc_num=Knowledgebase.doc_num - 1,
            ).where(Knowledgebase.id == doc.kb_id).execute()
        return True

    @classmethod
    @DB.connection_context()
    def clear_chunk_num(cls, doc_id):
        """Deprecated: use delete_document_and_update_kb_counts instead."""
        doc = cls.model.get_by_id(doc_id)
        assert doc, "Can't fine document in database."

        num = (
            Knowledgebase.update(token_num=Knowledgebase.token_num - doc.token_num, chunk_num=Knowledgebase.chunk_num - doc.chunk_num, doc_num=Knowledgebase.doc_num - 1)
            .where(Knowledgebase.id == doc.kb_id)
            .execute()
        )
        return num

    @classmethod
    @DB.connection_context()
    def clear_chunk_num_when_rerun(cls, doc_id):
        doc = cls.model.get_by_id(doc_id)
        assert doc, "Can't fine document in database."

        num = (
            Knowledgebase.update(
                token_num=Knowledgebase.token_num - doc.token_num,
                chunk_num=Knowledgebase.chunk_num - doc.chunk_num,
            )
            .where(Knowledgebase.id == doc.kb_id)
            .execute()
        )
        return num

    @classmethod
    @DB.connection_context()
    def get_tenant_id(cls, doc_id):
        docs = cls.model.select(Knowledgebase.tenant_id).join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id)).where(cls.model.id == doc_id, Knowledgebase.status == StatusEnum.VALID.value)
        docs = docs.dicts()
        if not docs:
            return None
        return docs[0]["tenant_id"]

    @classmethod
    @DB.connection_context()
    def get_knowledgebase_id(cls, doc_id):
        docs = cls.model.select(cls.model.kb_id).where(cls.model.id == doc_id)
        docs = docs.dicts()
        if not docs:
            return None
        return docs[0]["kb_id"]

    @classmethod
    @DB.connection_context()
    def get_tenant_id_by_name(cls, name):
        docs = cls.model.select(Knowledgebase.tenant_id).join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id)).where(cls.model.name == name, Knowledgebase.status == StatusEnum.VALID.value)
        docs = docs.dicts()
        if not docs:
            return None
        return docs[0]["tenant_id"]

    @classmethod
    @DB.connection_context()
    def accessible(cls, doc_id, user_id):
        docs = (
            cls.model.select(cls.model.id)
            .join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id))
            .join(UserTenant, on=(UserTenant.tenant_id == Knowledgebase.tenant_id))
            .where(cls.model.id == doc_id, UserTenant.user_id == user_id)
            .paginate(0, 1)
        )
        docs = docs.dicts()
        if not docs:
            return False
        return True

    @classmethod
    @DB.connection_context()
    def accessible4deletion(cls, doc_id, user_id):
        docs = (
            cls.model.select(cls.model.id)
            .join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id))
            .join(UserTenant, on=((UserTenant.tenant_id == Knowledgebase.created_by) & (UserTenant.user_id == user_id)))
            .where(cls.model.id == doc_id, UserTenant.status == StatusEnum.VALID.value, ((UserTenant.role == UserTenantRole.NORMAL) | (UserTenant.role == UserTenantRole.OWNER)))
            .paginate(0, 1)
        )
        docs = docs.dicts()
        if not docs:
            return False
        return True

    @classmethod
    @DB.connection_context()
    def get_embd_id(cls, doc_id):
        docs = cls.model.select(Knowledgebase.embd_id).join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id)).where(cls.model.id == doc_id, Knowledgebase.status == StatusEnum.VALID.value)
        docs = docs.dicts()
        if not docs:
            return None
        return docs[0]["embd_id"]

    @classmethod
    @DB.connection_context()
    def get_tenant_embd_id(cls, doc_id):
        docs = (
            cls.model.select(Knowledgebase.tenant_embd_id).join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id)).where(cls.model.id == doc_id, Knowledgebase.status == StatusEnum.VALID.value)
        )
        docs = docs.dicts()
        if not docs:
            return None
        return docs[0]["tenant_embd_id"]

    @classmethod
    @DB.connection_context()
    def get_chunking_config(cls, doc_id):
        configs = (
            cls.model.select(
                cls.model.id,
                cls.model.kb_id,
                cls.model.parser_id,
                cls.model.parser_config,
                cls.model.size,
                cls.model.content_hash,
                Knowledgebase.language,
                Knowledgebase.embd_id,
                Tenant.id.alias("tenant_id"),
                Tenant.img2txt_id,
                Tenant.asr_id,
                Tenant.llm_id,
            )
            .join(Knowledgebase, on=(cls.model.kb_id == Knowledgebase.id))
            .join(Tenant, on=(Knowledgebase.tenant_id == Tenant.id))
            .where(cls.model.id == doc_id)
        )
        configs = configs.dicts()
        if not configs:
            return None
        return configs[0]

    @classmethod
    @DB.connection_context()
    def get_doc_id_by_doc_name(cls, doc_name):
        fields = [cls.model.id]
        doc_id = cls.model.select(*fields).where(cls.model.name == doc_name)
        doc_id = doc_id.dicts()
        if not doc_id:
            return None
        return doc_id[0]["id"]

    @classmethod
    @DB.connection_context()
    def get_doc_ids_by_doc_names(cls, doc_names):
        if not doc_names:
            return []

        query = cls.model.select(cls.model.id).where(cls.model.name.in_(doc_names))
        return list(query.scalars().iterator())

    @classmethod
    @DB.connection_context()
    def get_thumbnails(cls, docids):
        fields = [cls.model.id, cls.model.kb_id, cls.model.thumbnail]
        return list(cls.model.select(*fields).where(cls.model.id.in_(docids)).dicts())

    @classmethod
    @DB.connection_context()
    def update_parser_config(cls, id, config):
        if not config:
            return
        e, d = cls.get_by_id(id)
        if not e:
            raise LookupError(f"Document({id}) not found.")

        def dfs_update(old, new):
            for k, v in new.items():
                if k not in old:
                    old[k] = v
                    continue
                if isinstance(v, dict) and isinstance(old[k], dict):
                    dfs_update(old[k], v)
                else:
                    old[k] = v

        dfs_update(d.parser_config, config)
        if not config.get("raptor") and d.parser_config.get("raptor"):
            del d.parser_config["raptor"]
        cls.update_by_id(id, {"parser_config": d.parser_config})

    @classmethod
    @DB.connection_context()
    def get_doc_count(cls, tenant_id):
        docs = cls.model.select(cls.model.id).join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id)).where(Knowledgebase.tenant_id == tenant_id)
        return len(docs)

    @classmethod
    @DB.connection_context()
    def begin2parse(cls, doc_id, keep_progress=False):
        info = {
            "progress_msg": "Task is queued...",
            "process_begin_at": get_format_time(),
        }
        if not keep_progress:
            info["progress"] = random.random() * 1 / 100.0
            info["run"] = TaskStatus.RUNNING.value
            # keep the doc in DONE state when keep_progress=True for GraphRAG, RAPTOR and Mindmap tasks

        cls.update_by_id(doc_id, info)

    @classmethod
    @DB.connection_context()
    def update_progress(cls):
        docs = cls.get_unfinished_docs()

        cls._sync_progress(docs)

    @classmethod
    @DB.connection_context()
    def update_progress_immediately(cls, docs: list[dict]):
        if not docs:
            return

        cls._sync_progress(docs)

    @classmethod
    @DB.connection_context()
    def _sync_progress(cls, docs: list[dict]):
        from api.db.services.task_service import TaskService

        for d in docs:
            try:
                tsks = TaskService.query(doc_id=d["id"], order_by=Task.create_time)
                if not tsks:
                    continue
                msg = []
                prg = 0
                finished = True
                bad = 0
                e, doc = DocumentService.get_by_id(d["id"])
                status = doc.run  # TaskStatus.RUNNING.value
                if status == TaskStatus.CANCEL.value:
                    continue
                doc_progress = doc.progress if doc and doc.progress else 0.0
                special_task_running = False
                priority = 0
                for t in tsks:
                    task_type = (t.task_type or "").lower()
                    if task_type in PIPELINE_SPECIAL_PROGRESS_FREEZE_TASK_TYPES:
                        special_task_running = True
                    if 0 <= t.progress < 1:
                        finished = False
                    if t.progress == -1:
                        bad += 1
                    prg += t.progress if t.progress >= 0 else 0
                    if t.progress_msg.strip():
                        msg.append(t.progress_msg)
                    priority = max(priority, t.priority)
                prg /= len(tsks)
                if finished and bad:
                    prg = -1
                    status = TaskStatus.FAIL.value
                elif finished:
                    prg = 1
                    status = TaskStatus.DONE.value
                elif not finished:
                    status = TaskStatus.RUNNING.value

                # only for special task and parsed docs and unfinished
                freeze_progress = special_task_running and doc_progress >= 1 and not finished
                msg = "\n".join(sorted(msg))
                begin_at = d.get("process_begin_at")
                if not begin_at:
                    begin_at = datetime.now()
                    # fallback
                    cls.update_by_id(d["id"], {"process_begin_at": begin_at})

                info = {"process_duration": max(datetime.timestamp(datetime.now()) - begin_at.timestamp(), 0), "run": status}
                if prg != 0 and not freeze_progress:
                    info["progress"] = prg
                if msg:
                    info["progress_msg"] = msg
                    if msg.endswith("created task graphrag") or msg.endswith("created task raptor") or msg.endswith("created task mindmap"):
                        info["progress_msg"] += "\n%d tasks are ahead in the queue..." % get_queue_length(priority)
                else:
                    info["progress_msg"] = "%d tasks are ahead in the queue..." % get_queue_length(priority)
                info["update_time"] = current_timestamp()
                info["update_date"] = get_format_time()
                (cls.model.update(info).where((cls.model.id == d["id"]) & ((cls.model.run.is_null(True)) | (cls.model.run != TaskStatus.CANCEL.value))).execute())
            except Exception as e:
                if str(e).find("'0'") < 0:
                    logging.exception("fetch task exception")

    @classmethod
    @DB.connection_context()
    def get_kb_doc_count(cls, kb_id):
        return cls.model.select().where(cls.model.kb_id == kb_id).count()

    @classmethod
    @DB.connection_context()
    def get_all_kb_doc_count(cls):
        result = {}
        rows = cls.model.select(cls.model.kb_id, fn.COUNT(cls.model.id).alias("count")).group_by(cls.model.kb_id)
        for row in rows:
            result[row.kb_id] = row.count
        return result

    @classmethod
    @DB.connection_context()
    def do_cancel(cls, doc_id):
        try:
            _, doc = DocumentService.get_by_id(doc_id)
            return doc.run == TaskStatus.CANCEL.value or doc.progress < 0
        except Exception:
            pass
        return False

    @classmethod
    @DB.connection_context()
    def knowledgebase_basic_info(cls, kb_id: str) -> dict[str, int]:
        # cancelled: run == "2"
        cancelled = cls.model.select(fn.COUNT(1)).where((cls.model.kb_id == kb_id) & (cls.model.run == TaskStatus.CANCEL)).scalar()
        downloaded = cls.model.select(fn.COUNT(1)).where(cls.model.kb_id == kb_id, cls.model.source_type != "local").scalar()

        row = (
            cls.model.select(
                # finished: progress == 1
                fn.COALESCE(fn.SUM(Case(None, [(cls.model.progress == 1, 1)], 0)), 0).alias("finished"),
                # failed: progress == -1
                fn.COALESCE(fn.SUM(Case(None, [(cls.model.progress == -1, 1)], 0)), 0).alias("failed"),
                # processing: 0 <= progress < 1
                fn.COALESCE(
                    fn.SUM(
                        Case(
                            None,
                            [
                                (((cls.model.progress == 0) | ((cls.model.progress > 0) & (cls.model.progress < 1))), 1),
                            ],
                            0,
                        )
                    ),
                    0,
                ).alias("processing"),
            )
            .where((cls.model.kb_id == kb_id) & ((cls.model.run.is_null(True)) | (cls.model.run != TaskStatus.CANCEL)))
            .dicts()
            .get()
        )

        return {"processing": int(row["processing"]), "finished": int(row["finished"]), "failed": int(row["failed"]), "cancelled": int(cancelled), "downloaded": int(downloaded)}

    @classmethod
    def run(cls, tenant_id: str, doc: dict, kb_table_num_map: dict):
        from api.db.services.task_service import queue_dataflow, queue_tasks
        from api.db.services.file2document_service import File2DocumentService

        doc["tenant_id"] = tenant_id
        doc_parser = doc.get("parser_id", ParserType.NAIVE)
        if doc_parser == ParserType.TABLE:
            kb_id = doc.get("kb_id")
            if not kb_id:
                return
            if kb_id not in kb_table_num_map:
                count = DocumentService.count_by_kb_id(kb_id=kb_id, keywords="", run_status=[TaskStatus.DONE], types=[])
                kb_table_num_map[kb_id] = count
                if kb_table_num_map[kb_id] <= 0:
                    KnowledgebaseService.delete_field_map(kb_id)
        if doc.get("pipeline_id", ""):
            queue_dataflow(tenant_id, flow_id=doc["pipeline_id"], task_id=get_uuid(), doc_id=doc["id"])
        else:
            bucket, name = File2DocumentService.get_storage_address(doc_id=doc["id"])
            queue_tasks(doc, bucket, name, 0)


def queue_raptor_o_graphrag_tasks(sample_doc_id, ty, priority, fake_doc_id="", doc_ids=[]):
    """
    You can provide a fake_doc_id to bypass the restriction of tasks at the knowledgebase level.
    Optionally, specify a list of doc_ids to determine which documents participate in the task.
    """
    assert ty in ["graphrag", "raptor", "mindmap"], "type should be graphrag, raptor or mindmap"

    chunking_config = DocumentService.get_chunking_config(sample_doc_id["id"])
    hasher = xxhash.xxh64()
    for field in sorted(chunking_config.keys()):
        hasher.update(str(chunking_config[field]).encode("utf-8"))

    def new_task():
        nonlocal sample_doc_id
        return {
            "id": get_uuid(),
            "doc_id": sample_doc_id["id"],
            "from_page": 100000000,
            "to_page": 100000000,
            "task_type": ty,
            "progress_msg": datetime.now().strftime("%H:%M:%S") + " created task " + ty,
            "begin_at": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
        }

    task = new_task()
    for field in ["doc_id", "from_page", "to_page"]:
        hasher.update(str(task.get(field, "")).encode("utf-8"))
    hasher.update(ty.encode("utf-8"))
    task["digest"] = hasher.hexdigest()
    bulk_insert_into_db(Task, [task], True)

    task["doc_id"] = fake_doc_id
    task["doc_ids"] = doc_ids
    DocumentService.begin2parse(sample_doc_id["id"], keep_progress=True)
    assert REDIS_CONN.queue_product(settings.get_svr_queue_name(priority), message=task), "Can't access Redis. Please check the Redis' status."
    return task["id"]


def get_queue_length(priority):
    group_info = REDIS_CONN.queue_info(settings.get_svr_queue_name(priority), SVR_CONSUMER_GROUP_NAME)
    if not group_info:
        return 0
    return int(group_info.get("lag", 0) or 0)


def doc_upload_and_parse(conversation_id, file_objs, user_id):
    from api.db.services.api_service import API4ConversationService
    from api.db.services.conversation_service import ConversationService
    from api.db.services.dialog_service import DialogService
    from api.db.services.file_service import FileService
    from api.db.services.llm_service import LLMBundle
    from api.db.services.user_service import TenantService
    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 rag.app import audio, email, naive, picture, presentation

    e, conv = ConversationService.get_by_id(conversation_id)
    if not e:
        e, conv = API4ConversationService.get_by_id(conversation_id)
    assert e, "Conversation not found!"

    e, dia = DialogService.get_by_id(conv.dialog_id)
    if not dia.kb_ids:
        raise LookupError("No dataset associated with this conversation. Please add a dataset before uploading documents")
    kb_id = dia.kb_ids[0]
    e, kb = KnowledgebaseService.get_by_id(kb_id)
    if not e:
        raise LookupError("Can't find this dataset!")
    if kb.tenant_embd_id:
        embd_model_config = get_model_config_by_id(kb.tenant_embd_id)
    else:
        embd_model_config = get_model_config_by_type_and_name(kb.tenant_id, LLMType.EMBEDDING, kb.embd_id)
    embd_mdl = LLMBundle(kb.tenant_id, embd_model_config, lang=kb.language)

    err, files = FileService.upload_document(kb, file_objs, user_id)
    assert not err, "\n".join(err)

    def dummy(prog=None, msg=""):
        pass

    FACTORY = {ParserType.PRESENTATION.value: presentation, ParserType.PICTURE.value: picture, ParserType.AUDIO.value: audio, ParserType.EMAIL.value: email}
    parser_config = {"chunk_token_num": 4096, "delimiter": "\n!?;。；！？", "layout_recognize": "Plain Text", "table_context_size": 0, "image_context_size": 0}
    exe = ThreadPoolExecutor(max_workers=12)
    threads = []
    doc_nm = {}
    for d, blob in files:
        doc_nm[d["id"]] = d["name"]
    for d, blob in files:
        kwargs = {"callback": dummy, "parser_config": parser_config, "from_page": 0, "to_page": 100000, "tenant_id": kb.tenant_id, "lang": kb.language}
        threads.append(exe.submit(FACTORY.get(d["parser_id"], naive).chunk, d["name"], blob, **kwargs))

    for (docinfo, _), th in zip(files, threads):
        docs = []
        doc = {"doc_id": docinfo["id"], "kb_id": [kb.id]}
        for ck in th.result():
            d = deepcopy(doc)
            d.update(ck)
            d["id"] = xxhash.xxh64((ck["content_with_weight"] + str(d["doc_id"])).encode("utf-8")).hexdigest()
            d["create_time"] = str(datetime.now()).replace("T", " ")[:19]
            d["create_timestamp_flt"] = datetime.now().timestamp()
            if not d.get("image"):
                docs.append(d)
                continue

            output_buffer = BytesIO()
            if isinstance(d["image"], bytes):
                output_buffer = BytesIO(d["image"])
            else:
                d["image"].save(output_buffer, format="JPEG")

            settings.STORAGE_IMPL.put(kb.id, d["id"], output_buffer.getvalue())
            d["img_id"] = "{}-{}".format(kb.id, d["id"])
            d.pop("image", None)
            docs.append(d)

    parser_ids = {d["id"]: d["parser_id"] for d, _ in files}
    docids = [d["id"] for d, _ in files]
    chunk_counts = {id: 0 for id in docids}
    token_counts = {id: 0 for id in docids}
    es_bulk_size = 64

    def embedding(doc_id, cnts, batch_size=16):
        nonlocal embd_mdl, chunk_counts, token_counts
        vectors = []
        for i in range(0, len(cnts), batch_size):
            vts, c = embd_mdl.encode(cnts[i : i + batch_size])
            vectors.extend(vts.tolist())
            chunk_counts[doc_id] += len(cnts[i : i + batch_size])
            token_counts[doc_id] += c
        return vectors

    idxnm = search.index_name(kb.tenant_id)
    try_create_idx = True

    _, tenant = TenantService.get_by_id(kb.tenant_id)
    tenant_llm_config = get_tenant_default_model_by_type(kb.tenant_id, LLMType.CHAT)
    llm_bdl = LLMBundle(kb.tenant_id, tenant_llm_config)
    for doc_id in docids:
        cks = [c for c in docs if c["doc_id"] == doc_id]

        if parser_ids[doc_id] != ParserType.PICTURE.value:
            from rag.graphrag.general.mind_map_extractor import MindMapExtractor

            mindmap = MindMapExtractor(llm_bdl)
            try:
                mind_map = asyncio.run(mindmap([c["content_with_weight"] for c in docs if c["doc_id"] == doc_id]))
                mind_map = json.dumps(mind_map.output, ensure_ascii=False, indent=2)
                if len(mind_map) < 32:
                    raise Exception("Few content: " + mind_map)
                cks.append(
                    {
                        "id": get_uuid(),
                        "doc_id": doc_id,
                        "kb_id": [kb.id],
                        "docnm_kwd": doc_nm[doc_id],
                        "title_tks": rag_tokenizer.tokenize(re.sub(r"\.[a-zA-Z]+$", "", doc_nm[doc_id])),
                        "content_ltks": rag_tokenizer.tokenize("summary summarize 总结 概况 file 文件 概括"),
                        "content_with_weight": mind_map,
                        "knowledge_graph_kwd": "mind_map",
                    }
                )
            except Exception:
                logging.exception("Mind map generation error")

        vectors = embedding(doc_id, [c["content_with_weight"] for c in cks])
        assert len(cks) == len(vectors)
        for i, d in enumerate(cks):
            v = vectors[i]
            d["q_%d_vec" % len(v)] = v
        for b in range(0, len(cks), es_bulk_size):
            if try_create_idx:
                if not settings.docStoreConn.index_exist(idxnm, kb_id):
                    settings.docStoreConn.create_idx(idxnm, kb_id, len(vectors[0]), kb.parser_id)
                try_create_idx = False
            settings.docStoreConn.insert(cks[b : b + es_bulk_size], idxnm, kb_id)

        DocumentService.increment_chunk_num(doc_id, kb.id, token_counts[doc_id], chunk_counts[doc_id], 0)

    return [d["id"] for d, _ in files]
