#
#  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 inspect
import logging
import operator
import os
import sys
import typing
import time
from enum import Enum
from functools import wraps
import hashlib

from flask_login import UserMixin
from itsdangerous.url_safe import URLSafeTimedSerializer as Serializer
from peewee import BigIntegerField, BooleanField, CharField, CompositeKey, DateTimeField, Field, FloatField, IntegerField, Metadata, Model, TextField
from playhouse.migrate import MySQLMigrator, PostgresqlMigrator, migrate
from playhouse.pool import PooledMySQLDatabase, PooledPostgresqlDatabase

from api import settings, utils
from api.db import ParserType, SerializedType


def singleton(cls, *args, **kw):
    instances = {}

    def _singleton():
        key = str(cls) + str(os.getpid())
        if key not in instances:
            instances[key] = cls(*args, **kw)
        return instances[key]

    return _singleton


CONTINUOUS_FIELD_TYPE = {IntegerField, FloatField, DateTimeField}
AUTO_DATE_TIMESTAMP_FIELD_PREFIX = {"create", "start", "end", "update", "read_access", "write_access"}


class TextFieldType(Enum):
    MYSQL = "LONGTEXT"
    POSTGRES = "TEXT"


class LongTextField(TextField):
    field_type = TextFieldType[settings.DATABASE_TYPE.upper()].value


class JSONField(LongTextField):
    default_value = {}

    def __init__(self, object_hook=None, object_pairs_hook=None, **kwargs):
        self._object_hook = object_hook
        self._object_pairs_hook = object_pairs_hook
        super().__init__(**kwargs)

    def db_value(self, value):
        if value is None:
            value = self.default_value
        return utils.json_dumps(value)

    def python_value(self, value):
        if not value:
            return self.default_value
        return utils.json_loads(value, object_hook=self._object_hook, object_pairs_hook=self._object_pairs_hook)


class ListField(JSONField):
    default_value = []


class SerializedField(LongTextField):
    def __init__(self, serialized_type=SerializedType.PICKLE, object_hook=None, object_pairs_hook=None, **kwargs):
        self._serialized_type = serialized_type
        self._object_hook = object_hook
        self._object_pairs_hook = object_pairs_hook
        super().__init__(**kwargs)

    def db_value(self, value):
        if self._serialized_type == SerializedType.PICKLE:
            return utils.serialize_b64(value, to_str=True)
        elif self._serialized_type == SerializedType.JSON:
            if value is None:
                return None
            return utils.json_dumps(value, with_type=True)
        else:
            raise ValueError(f"the serialized type {self._serialized_type} is not supported")

    def python_value(self, value):
        if self._serialized_type == SerializedType.PICKLE:
            return utils.deserialize_b64(value)
        elif self._serialized_type == SerializedType.JSON:
            if value is None:
                return {}
            return utils.json_loads(value, object_hook=self._object_hook, object_pairs_hook=self._object_pairs_hook)
        else:
            raise ValueError(f"the serialized type {self._serialized_type} is not supported")


def is_continuous_field(cls: typing.Type) -> bool:
    if cls in CONTINUOUS_FIELD_TYPE:
        return True
    for p in cls.__bases__:
        if p in CONTINUOUS_FIELD_TYPE:
            return True
        elif p is not Field and p is not object:
            if is_continuous_field(p):
                return True
    else:
        return False


def auto_date_timestamp_field():
    return {f"{f}_time" for f in AUTO_DATE_TIMESTAMP_FIELD_PREFIX}


def auto_date_timestamp_db_field():
    return {f"f_{f}_time" for f in AUTO_DATE_TIMESTAMP_FIELD_PREFIX}


def remove_field_name_prefix(field_name):
    return field_name[2:] if field_name.startswith("f_") else field_name


class BaseModel(Model):
    create_time = BigIntegerField(null=True, index=True)
    create_date = DateTimeField(null=True, index=True)
    update_time = BigIntegerField(null=True, index=True)
    update_date = DateTimeField(null=True, index=True)

    def to_json(self):
        # This function is obsolete
        return self.to_dict()

    def to_dict(self):
        return self.__dict__["__data__"]

    def to_human_model_dict(self, only_primary_with: list = None):
        model_dict = self.__dict__["__data__"]

        if not only_primary_with:
            return {remove_field_name_prefix(k): v for k, v in model_dict.items()}

        human_model_dict = {}
        for k in self._meta.primary_key.field_names:
            human_model_dict[remove_field_name_prefix(k)] = model_dict[k]
        for k in only_primary_with:
            human_model_dict[k] = model_dict[f"f_{k}"]
        return human_model_dict

    @property
    def meta(self) -> Metadata:
        return self._meta

    @classmethod
    def get_primary_keys_name(cls):
        return cls._meta.primary_key.field_names if isinstance(cls._meta.primary_key, CompositeKey) else [cls._meta.primary_key.name]

    @classmethod
    def getter_by(cls, attr):
        return operator.attrgetter(attr)(cls)

    @classmethod
    def query(cls, reverse=None, order_by=None, **kwargs):
        filters = []
        for f_n, f_v in kwargs.items():
            attr_name = "%s" % f_n
            if not hasattr(cls, attr_name) or f_v is None:
                continue
            if type(f_v) in {list, set}:
                f_v = list(f_v)
                if is_continuous_field(type(getattr(cls, attr_name))):
                    if len(f_v) == 2:
                        for i, v in enumerate(f_v):
                            if isinstance(v, str) and f_n in auto_date_timestamp_field():
                                # time type: %Y-%m-%d %H:%M:%S
                                f_v[i] = utils.date_string_to_timestamp(v)
                        lt_value = f_v[0]
                        gt_value = f_v[1]
                        if lt_value is not None and gt_value is not None:
                            filters.append(cls.getter_by(attr_name).between(lt_value, gt_value))
                        elif lt_value is not None:
                            filters.append(operator.attrgetter(attr_name)(cls) >= lt_value)
                        elif gt_value is not None:
                            filters.append(operator.attrgetter(attr_name)(cls) <= gt_value)
                else:
                    filters.append(operator.attrgetter(attr_name)(cls) << f_v)
            else:
                filters.append(operator.attrgetter(attr_name)(cls) == f_v)
        if filters:
            query_records = cls.select().where(*filters)
            if reverse is not None:
                if not order_by or not hasattr(cls, f"{order_by}"):
                    order_by = "create_time"
                if reverse is True:
                    query_records = query_records.order_by(cls.getter_by(f"{order_by}").desc())
                elif reverse is False:
                    query_records = query_records.order_by(cls.getter_by(f"{order_by}").asc())
            return [query_record for query_record in query_records]
        else:
            return []

    @classmethod
    def insert(cls, __data=None, **insert):
        if isinstance(__data, dict) and __data:
            __data[cls._meta.combined["create_time"]] = utils.current_timestamp()
        if insert:
            insert["create_time"] = utils.current_timestamp()

        return super().insert(__data, **insert)

    # update and insert will call this method
    @classmethod
    def _normalize_data(cls, data, kwargs):
        normalized = super()._normalize_data(data, kwargs)
        if not normalized:
            return {}

        normalized[cls._meta.combined["update_time"]] = utils.current_timestamp()

        for f_n in AUTO_DATE_TIMESTAMP_FIELD_PREFIX:
            if {f"{f_n}_time", f"{f_n}_date"}.issubset(cls._meta.combined.keys()) and cls._meta.combined[f"{f_n}_time"] in normalized and normalized[cls._meta.combined[f"{f_n}_time"]] is not None:
                normalized[cls._meta.combined[f"{f_n}_date"]] = utils.timestamp_to_date(normalized[cls._meta.combined[f"{f_n}_time"]])

        return normalized


class JsonSerializedField(SerializedField):
    def __init__(self, object_hook=utils.from_dict_hook, object_pairs_hook=None, **kwargs):
        super(JsonSerializedField, self).__init__(serialized_type=SerializedType.JSON, object_hook=object_hook, object_pairs_hook=object_pairs_hook, **kwargs)


class PooledDatabase(Enum):
    MYSQL = PooledMySQLDatabase
    POSTGRES = PooledPostgresqlDatabase


class DatabaseMigrator(Enum):
    MYSQL = MySQLMigrator
    POSTGRES = PostgresqlMigrator


@singleton
class BaseDataBase:
    def __init__(self):
        database_config = settings.DATABASE.copy()
        db_name = database_config.pop("name")
        self.database_connection = PooledDatabase[settings.DATABASE_TYPE.upper()].value(db_name, **database_config)
        logging.info("init database on cluster mode successfully")


def with_retry(max_retries=3, retry_delay=1.0):
    """Decorator: Add retry mechanism to database operations
    
    Args:
        max_retries (int): maximum number of retries
        retry_delay (float): initial retry delay (seconds), will increase exponentially
        
    Returns:
        decorated function
    """
    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwargs):
            last_exception = None
            for retry in range(max_retries):
                try:
                    return func(*args, **kwargs)
                except Exception as e:
                    last_exception = e
                    # get self and method name for logging
                    self_obj = args[0] if args else None
                    func_name = func.__name__
                    lock_name = getattr(self_obj, 'lock_name', 'unknown') if self_obj else 'unknown'
                    
                    if retry < max_retries - 1:
                        current_delay = retry_delay * (2 ** retry)
                        logging.warning(f"{func_name} {lock_name} failed: {str(e)}, retrying ({retry+1}/{max_retries})")
                        time.sleep(current_delay)
                    else:
                        logging.error(f"{func_name} {lock_name} failed after all attempts: {str(e)}")
            
            if last_exception:
                raise last_exception
            return False
        return wrapper
    return decorator


class PostgresDatabaseLock:
    def __init__(self, lock_name, timeout=10, db=None):
        self.lock_name = lock_name
        self.lock_id = int(hashlib.md5(lock_name.encode()).hexdigest(), 16) % (2**31-1)
        self.timeout = int(timeout)
        self.db = db if db else DB

    @with_retry(max_retries=3, retry_delay=1.0)
    def lock(self):
        cursor = self.db.execute_sql("SELECT pg_try_advisory_lock(%s)", (self.lock_id,))
        ret = cursor.fetchone()
        if ret[0] == 0:
            raise Exception(f"acquire postgres lock {self.lock_name} timeout")
        elif ret[0] == 1:
            return True
        else:
            raise Exception(f"failed to acquire lock {self.lock_name}")

    @with_retry(max_retries=3, retry_delay=1.0)
    def unlock(self):
        cursor = self.db.execute_sql("SELECT pg_advisory_unlock(%s)", (self.lock_id,))
        ret = cursor.fetchone()
        if ret[0] == 0:
            raise Exception(f"postgres lock {self.lock_name} was not established by this thread")
        elif ret[0] == 1:
            return True
        else:
            raise Exception(f"postgres lock {self.lock_name} does not exist")

    def __enter__(self):
        if isinstance(self.db, PooledPostgresqlDatabase):
            self.lock()
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        if isinstance(self.db, PooledPostgresqlDatabase):
            self.unlock()

    def __call__(self, func):
        @wraps(func)
        def magic(*args, **kwargs):
            with self:
                return func(*args, **kwargs)

        return magic


class MysqlDatabaseLock:
    def __init__(self, lock_name, timeout=10, db=None):
        self.lock_name = lock_name
        self.timeout = int(timeout)
        self.db = db if db else DB

    @with_retry(max_retries=3, retry_delay=1.0)
    def lock(self):
        # SQL parameters only support %s format placeholders
        cursor = self.db.execute_sql("SELECT GET_LOCK(%s, %s)", (self.lock_name, self.timeout))
        ret = cursor.fetchone()
        if ret[0] == 0:
            raise Exception(f"acquire mysql lock {self.lock_name} timeout")
        elif ret[0] == 1:
            return True
        else:
            raise Exception(f"failed to acquire lock {self.lock_name}")

    @with_retry(max_retries=3, retry_delay=1.0)
    def unlock(self):
        cursor = self.db.execute_sql("SELECT RELEASE_LOCK(%s)", (self.lock_name,))
        ret = cursor.fetchone()
        if ret[0] == 0:
            raise Exception(f"mysql lock {self.lock_name} was not established by this thread")
        elif ret[0] == 1:
            return True
        else:
            raise Exception(f"mysql lock {self.lock_name} does not exist")

    def __enter__(self):
        if isinstance(self.db, PooledMySQLDatabase):
            self.lock()
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        if isinstance(self.db, PooledMySQLDatabase):
            self.unlock()

    def __call__(self, func):
        @wraps(func)
        def magic(*args, **kwargs):
            with self:
                return func(*args, **kwargs)

        return magic


class DatabaseLock(Enum):
    MYSQL = MysqlDatabaseLock
    POSTGRES = PostgresDatabaseLock


DB = BaseDataBase().database_connection
DB.lock = DatabaseLock[settings.DATABASE_TYPE.upper()].value


def close_connection():
    try:
        if DB:
            DB.close_stale(age=30)
    except Exception as e:
        logging.exception(e)


class DataBaseModel(BaseModel):
    class Meta:
        database = DB


@DB.connection_context()
def init_database_tables(alter_fields=[]):
    members = inspect.getmembers(sys.modules[__name__], inspect.isclass)
    table_objs = []
    create_failed_list = []
    for name, obj in members:
        if obj != DataBaseModel and issubclass(obj, DataBaseModel):
            table_objs.append(obj)

            if not obj.table_exists():
                logging.debug(f"start create table {obj.__name__}")
                try:
                    obj.create_table()
                    logging.debug(f"create table success: {obj.__name__}")
                except Exception as e:
                    logging.exception(e)
                    create_failed_list.append(obj.__name__)
            else:
                logging.debug(f"table {obj.__name__} already exists, skip creation.")

    if create_failed_list:
        logging.error(f"create tables failed: {create_failed_list}")
        raise Exception(f"create tables failed: {create_failed_list}")
    migrate_db()


def fill_db_model_object(model_object, human_model_dict):
    for k, v in human_model_dict.items():
        attr_name = "%s" % k
        if hasattr(model_object.__class__, attr_name):
            setattr(model_object, attr_name, v)
    return model_object


class User(DataBaseModel, UserMixin):
    id = CharField(max_length=32, primary_key=True)
    access_token = CharField(max_length=255, null=True, index=True)
    nickname = CharField(max_length=100, null=False, help_text="nicky name", index=True)
    password = CharField(max_length=255, null=True, help_text="password", index=True)
    email = CharField(max_length=255, null=False, help_text="email", index=True)
    avatar = TextField(null=True, help_text="avatar base64 string")
    language = CharField(max_length=32, null=True, help_text="English|Chinese", default="Chinese" if "zh_CN" in os.getenv("LANG", "") else "English", index=True)
    color_schema = CharField(max_length=32, null=True, help_text="Bright|Dark", default="Bright", index=True)
    timezone = CharField(max_length=64, null=True, help_text="Timezone", default="UTC+8\tAsia/Shanghai", index=True)
    last_login_time = DateTimeField(null=True, index=True)
    is_authenticated = CharField(max_length=1, null=False, default="1", index=True)
    is_active = CharField(max_length=1, null=False, default="1", index=True)
    is_anonymous = CharField(max_length=1, null=False, default="0", index=True)
    login_channel = CharField(null=True, help_text="from which user login", index=True)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)
    is_superuser = BooleanField(null=True, help_text="is root", default=False, index=True)

    def __str__(self):
        return self.email

    def get_id(self):
        jwt = Serializer(secret_key=settings.SECRET_KEY)
        return jwt.dumps(str(self.access_token))

    class Meta:
        db_table = "user"


class Tenant(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    name = CharField(max_length=100, null=True, help_text="Tenant name", index=True)
    public_key = CharField(max_length=255, null=True, index=True)
    llm_id = CharField(max_length=128, null=False, help_text="default llm ID", index=True)
    embd_id = CharField(max_length=128, null=False, help_text="default embedding model ID", index=True)
    asr_id = CharField(max_length=128, null=False, help_text="default ASR model ID", index=True)
    img2txt_id = CharField(max_length=128, null=False, help_text="default image to text model ID", index=True)
    rerank_id = CharField(max_length=128, null=False, help_text="default rerank model ID", index=True)
    tts_id = CharField(max_length=256, null=True, help_text="default tts model ID", index=True)
    parser_ids = CharField(max_length=256, null=False, help_text="document processors", index=True)
    credit = IntegerField(default=512, index=True)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    class Meta:
        db_table = "tenant"


class UserTenant(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    user_id = CharField(max_length=32, null=False, index=True)
    tenant_id = CharField(max_length=32, null=False, index=True)
    role = CharField(max_length=32, null=False, help_text="UserTenantRole", index=True)
    invited_by = CharField(max_length=32, null=False, index=True)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    class Meta:
        db_table = "user_tenant"


class InvitationCode(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    code = CharField(max_length=32, null=False, index=True)
    visit_time = DateTimeField(null=True, index=True)
    user_id = CharField(max_length=32, null=True, index=True)
    tenant_id = CharField(max_length=32, null=True, index=True)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    class Meta:
        db_table = "invitation_code"


class LLMFactories(DataBaseModel):
    name = CharField(max_length=128, null=False, help_text="LLM factory name", primary_key=True)
    logo = TextField(null=True, help_text="llm logo base64")
    tags = CharField(max_length=255, null=False, help_text="LLM, Text Embedding, Image2Text, ASR", index=True)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    def __str__(self):
        return self.name

    class Meta:
        db_table = "llm_factories"


class LLM(DataBaseModel):
    # LLMs dictionary
    llm_name = CharField(max_length=128, null=False, help_text="LLM name", index=True)
    model_type = CharField(max_length=128, null=False, help_text="LLM, Text Embedding, Image2Text, ASR", index=True)
    fid = CharField(max_length=128, null=False, help_text="LLM factory id", index=True)
    max_tokens = IntegerField(default=0)

    tags = CharField(max_length=255, null=False, help_text="LLM, Text Embedding, Image2Text, Chat, 32k...", index=True)
    is_tools =  BooleanField(null=False, help_text="support tools", default=False)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    def __str__(self):
        return self.llm_name

    class Meta:
        primary_key = CompositeKey("fid", "llm_name")
        db_table = "llm"


class TenantLLM(DataBaseModel):
    tenant_id = CharField(max_length=32, null=False, index=True)
    llm_factory = CharField(max_length=128, null=False, help_text="LLM factory name", index=True)
    model_type = CharField(max_length=128, null=True, help_text="LLM, Text Embedding, Image2Text, ASR", index=True)
    llm_name = CharField(max_length=128, null=True, help_text="LLM name", default="", index=True)
    api_key = CharField(max_length=2048, null=True, help_text="API KEY", index=True)
    api_base = CharField(max_length=255, null=True, help_text="API Base")
    max_tokens = IntegerField(default=8192, index=True)
    used_tokens = IntegerField(default=0, index=True)

    def __str__(self):
        return self.llm_name

    class Meta:
        db_table = "tenant_llm"
        primary_key = CompositeKey("tenant_id", "llm_factory", "llm_name")


class TenantLangfuse(DataBaseModel):
    tenant_id = CharField(max_length=32, null=False, primary_key=True)
    secret_key = CharField(max_length=2048, null=False, help_text="SECRET KEY", index=True)
    public_key = CharField(max_length=2048, null=False, help_text="PUBLIC KEY", index=True)
    host = CharField(max_length=128, null=False, help_text="HOST", index=True)

    def __str__(self):
        return "Langfuse host" + self.host

    class Meta:
        db_table = "tenant_langfuse"


class Knowledgebase(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    avatar = TextField(null=True, help_text="avatar base64 string")
    tenant_id = CharField(max_length=32, null=False, index=True)
    name = CharField(max_length=128, null=False, help_text="KB name", index=True)
    language = CharField(max_length=32, null=True, default="Chinese" if "zh_CN" in os.getenv("LANG", "") else "English", help_text="English|Chinese", index=True)
    description = TextField(null=True, help_text="KB description")
    embd_id = CharField(max_length=128, null=False, help_text="default embedding model ID", index=True)
    permission = CharField(max_length=16, null=False, help_text="me|team", default="me", index=True)
    created_by = CharField(max_length=32, null=False, index=True)
    doc_num = IntegerField(default=0, index=True)
    token_num = IntegerField(default=0, index=True)
    chunk_num = IntegerField(default=0, index=True)
    similarity_threshold = FloatField(default=0.2, index=True)
    vector_similarity_weight = FloatField(default=0.3, index=True)

    parser_id = CharField(max_length=32, null=False, help_text="default parser ID", default=ParserType.NAIVE.value, index=True)
    parser_config = JSONField(null=False, default={"pages": [[1, 1000000]]})
    pagerank = IntegerField(default=0, index=False)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    def __str__(self):
        return self.name

    class Meta:
        db_table = "knowledgebase"


class Document(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    thumbnail = TextField(null=True, help_text="thumbnail base64 string")
    kb_id = CharField(max_length=256, null=False, index=True)
    parser_id = CharField(max_length=32, null=False, help_text="default parser ID", index=True)
    parser_config = JSONField(null=False, default={"pages": [[1, 1000000]]})
    source_type = CharField(max_length=128, null=False, default="local", help_text="where dose this document come from", index=True)
    type = CharField(max_length=32, null=False, help_text="file extension", index=True)
    created_by = CharField(max_length=32, null=False, help_text="who created it", index=True)
    name = CharField(max_length=255, null=True, help_text="file name", index=True)
    location = CharField(max_length=255, null=True, help_text="where dose it store", index=True)
    size = IntegerField(default=0, index=True)
    token_num = IntegerField(default=0, index=True)
    chunk_num = IntegerField(default=0, index=True)
    progress = FloatField(default=0, index=True)
    progress_msg = TextField(null=True, help_text="process message", default="")
    process_begin_at = DateTimeField(null=True, index=True)
    process_duation = FloatField(default=0)
    meta_fields = JSONField(null=True, default={})

    run = CharField(max_length=1, null=True, help_text="start to run processing or cancel.(1: run it; 2: cancel)", default="0", index=True)
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    class Meta:
        db_table = "document"


class File(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    parent_id = CharField(max_length=32, null=False, help_text="parent folder id", index=True)
    tenant_id = CharField(max_length=32, null=False, help_text="tenant id", index=True)
    created_by = CharField(max_length=32, null=False, help_text="who created it", index=True)
    name = CharField(max_length=255, null=False, help_text="file name or folder name", index=True)
    location = CharField(max_length=255, null=True, help_text="where dose it store", index=True)
    size = IntegerField(default=0, index=True)
    type = CharField(max_length=32, null=False, help_text="file extension", index=True)
    source_type = CharField(max_length=128, null=False, default="", help_text="where dose this document come from", index=True)

    class Meta:
        db_table = "file"


class File2Document(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    file_id = CharField(max_length=32, null=True, help_text="file id", index=True)
    document_id = CharField(max_length=32, null=True, help_text="document id", index=True)

    class Meta:
        db_table = "file2document"


class Task(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    doc_id = CharField(max_length=32, null=False, index=True)
    from_page = IntegerField(default=0)
    to_page = IntegerField(default=100000000)
    task_type = CharField(max_length=32, null=False, default="")
    priority = IntegerField(default=0)

    begin_at = DateTimeField(null=True, index=True)
    process_duation = FloatField(default=0)

    progress = FloatField(default=0, index=True)
    progress_msg = TextField(null=True, help_text="process message", default="")
    retry_count = IntegerField(default=0)
    digest = TextField(null=True, help_text="task digest", default="")
    chunk_ids = LongTextField(null=True, help_text="chunk ids", default="")


class Dialog(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    tenant_id = CharField(max_length=32, null=False, index=True)
    name = CharField(max_length=255, null=True, help_text="dialog application name", index=True)
    description = TextField(null=True, help_text="Dialog description")
    icon = TextField(null=True, help_text="icon base64 string")
    language = CharField(max_length=32, null=True, default="Chinese" if "zh_CN" in os.getenv("LANG", "") else "English", help_text="English|Chinese", index=True)
    llm_id = CharField(max_length=128, null=False, help_text="default llm ID")

    llm_setting = JSONField(null=False, default={"temperature": 0.1, "top_p": 0.3, "frequency_penalty": 0.7, "presence_penalty": 0.4, "max_tokens": 512})
    prompt_type = CharField(max_length=16, null=False, default="simple", help_text="simple|advanced", index=True)
    prompt_config = JSONField(
        null=False,
        default={"system": "", "prologue": "Hi! I'm your assistant, what can I do for you?", "parameters": [], "empty_response": "Sorry! No relevant content was found in the knowledge base!"},
    )

    similarity_threshold = FloatField(default=0.2)
    vector_similarity_weight = FloatField(default=0.3)

    top_n = IntegerField(default=6)

    top_k = IntegerField(default=1024)

    do_refer = CharField(max_length=1, null=False, default="1", help_text="it needs to insert reference index into answer or not")

    rerank_id = CharField(max_length=128, null=False, help_text="default rerank model ID")

    kb_ids = JSONField(null=False, default=[])
    status = CharField(max_length=1, null=True, help_text="is it validate(0: wasted, 1: validate)", default="1", index=True)

    class Meta:
        db_table = "dialog"


class Conversation(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    dialog_id = CharField(max_length=32, null=False, index=True)
    name = CharField(max_length=255, null=True, help_text="converastion name", index=True)
    message = JSONField(null=True)
    reference = JSONField(null=True, default=[])
    user_id = CharField(max_length=255, null=True, help_text="user_id", index=True)

    class Meta:
        db_table = "conversation"


class APIToken(DataBaseModel):
    tenant_id = CharField(max_length=32, null=False, index=True)
    token = CharField(max_length=255, null=False, index=True)
    dialog_id = CharField(max_length=32, null=True, index=True)
    source = CharField(max_length=16, null=True, help_text="none|agent|dialog", index=True)
    beta = CharField(max_length=255, null=True, index=True)

    class Meta:
        db_table = "api_token"
        primary_key = CompositeKey("tenant_id", "token")


class API4Conversation(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    dialog_id = CharField(max_length=32, null=False, index=True)
    user_id = CharField(max_length=255, null=False, help_text="user_id", index=True)
    message = JSONField(null=True)
    reference = JSONField(null=True, default=[])
    tokens = IntegerField(default=0)
    source = CharField(max_length=16, null=True, help_text="none|agent|dialog", index=True)
    dsl = JSONField(null=True, default={})
    duration = FloatField(default=0, index=True)
    round = IntegerField(default=0, index=True)
    thumb_up = IntegerField(default=0, index=True)

    class Meta:
        db_table = "api_4_conversation"


class UserCanvas(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    avatar = TextField(null=True, help_text="avatar base64 string")
    user_id = CharField(max_length=255, null=False, help_text="user_id", index=True)
    title = CharField(max_length=255, null=True, help_text="Canvas title")

    permission = CharField(max_length=16, null=False, help_text="me|team", default="me", index=True)
    description = TextField(null=True, help_text="Canvas description")
    canvas_type = CharField(max_length=32, null=True, help_text="Canvas type", index=True)
    dsl = JSONField(null=True, default={})

    class Meta:
        db_table = "user_canvas"


class CanvasTemplate(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    avatar = TextField(null=True, help_text="avatar base64 string")
    title = CharField(max_length=255, null=True, help_text="Canvas title")

    description = TextField(null=True, help_text="Canvas description")
    canvas_type = CharField(max_length=32, null=True, help_text="Canvas type", index=True)
    dsl = JSONField(null=True, default={})

    class Meta:
        db_table = "canvas_template"


class UserCanvasVersion(DataBaseModel):
    id = CharField(max_length=32, primary_key=True)
    user_canvas_id = CharField(max_length=255, null=False, help_text="user_canvas_id", index=True)

    title = CharField(max_length=255, null=True, help_text="Canvas title")
    description = TextField(null=True, help_text="Canvas description")
    dsl = JSONField(null=True, default={})

    class Meta:
        db_table = "user_canvas_version"


def migrate_db():
    migrator = DatabaseMigrator[settings.DATABASE_TYPE.upper()].value(DB)
    try:
        migrate(migrator.add_column("file", "source_type", CharField(max_length=128, null=False, default="", help_text="where dose this document come from", index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("tenant", "rerank_id", CharField(max_length=128, null=False, default="BAAI/bge-reranker-v2-m3", help_text="default rerank model ID")))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("dialog", "rerank_id", CharField(max_length=128, null=False, default="", help_text="default rerank model ID")))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("dialog", "top_k", IntegerField(default=1024)))
    except Exception:
        pass
    try:
        migrate(migrator.alter_column_type("tenant_llm", "api_key", CharField(max_length=2048, null=True, help_text="API KEY", index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("api_token", "source", CharField(max_length=16, null=True, help_text="none|agent|dialog", index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("tenant", "tts_id", CharField(max_length=256, null=True, help_text="default tts model ID", index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("api_4_conversation", "source", CharField(max_length=16, null=True, help_text="none|agent|dialog", index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("task", "retry_count", IntegerField(default=0)))
    except Exception:
        pass
    try:
        migrate(migrator.alter_column_type("api_token", "dialog_id", CharField(max_length=32, null=True, index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("tenant_llm", "max_tokens", IntegerField(default=8192, index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("api_4_conversation", "dsl", JSONField(null=True, default={})))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("knowledgebase", "pagerank", IntegerField(default=0, index=False)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("api_token", "beta", CharField(max_length=255, null=True, index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("task", "digest", TextField(null=True, help_text="task digest", default="")))
    except Exception:
        pass

    try:
        migrate(migrator.add_column("task", "chunk_ids", LongTextField(null=True, help_text="chunk ids", default="")))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("conversation", "user_id", CharField(max_length=255, null=True, help_text="user_id", index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("document", "meta_fields", JSONField(null=True, default={})))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("task", "task_type", CharField(max_length=32, null=False, default="")))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("task", "priority", IntegerField(default=0)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("user_canvas", "permission", CharField(max_length=16, null=False, help_text="me|team", default="me", index=True)))
    except Exception:
        pass
    try:
        migrate(migrator.add_column("llm", "is_tools", BooleanField(null=False, help_text="support tools", default=False)))
    except Exception:
        pass