from enum import Enum
from typing import Optional, Union

from pydantic import BaseModel, ConfigDict, Field

from core.entities.parameter_entities import AppSelectorScope, CommonParameterType, ModelConfigScope
from core.model_runtime.entities.common_entities import I18nObject
from core.model_runtime.entities.model_entities import ModelType
from models.provider import ProviderQuotaType


class QuotaUnit(Enum):
    TIMES = 'times'
    TOKENS = 'tokens'
    CREDITS = 'credits'


class SystemConfigurationStatus(Enum):
    """
    Enum class for system configuration status.
    """
    ACTIVE = 'active'
    QUOTA_EXCEEDED = 'quota-exceeded'
    UNSUPPORTED = 'unsupported'


class RestrictModel(BaseModel):
    model: str
    base_model_name: Optional[str] = None
    model_type: ModelType

    # pydantic configs
    model_config = ConfigDict(protected_namespaces=())


class QuotaConfiguration(BaseModel):
    """
    Model class for provider quota configuration.
    """
    quota_type: ProviderQuotaType
    quota_unit: QuotaUnit
    quota_limit: int
    quota_used: int
    is_valid: bool
    restrict_models: list[RestrictModel] = []


class SystemConfiguration(BaseModel):
    """
    Model class for provider system configuration.
    """
    enabled: bool
    current_quota_type: Optional[ProviderQuotaType] = None
    quota_configurations: list[QuotaConfiguration] = []
    credentials: Optional[dict] = None


class CustomProviderConfiguration(BaseModel):
    """
    Model class for provider custom configuration.
    """
    credentials: dict


class CustomModelConfiguration(BaseModel):
    """
    Model class for provider custom model configuration.
    """
    model: str
    model_type: ModelType
    credentials: dict

    # pydantic configs
    model_config = ConfigDict(protected_namespaces=())


class CustomConfiguration(BaseModel):
    """
    Model class for provider custom configuration.
    """
    provider: Optional[CustomProviderConfiguration] = None
    models: list[CustomModelConfiguration] = []


class ModelLoadBalancingConfiguration(BaseModel):
    """
    Class for model load balancing configuration.
    """
    id: str
    name: str
    credentials: dict


class ModelSettings(BaseModel):
    """
    Model class for model settings.
    """
    model: str
    model_type: ModelType
    enabled: bool = True
    load_balancing_configs: list[ModelLoadBalancingConfiguration] = []

    # pydantic configs
    model_config = ConfigDict(protected_namespaces=())

class BasicProviderConfig(BaseModel):
    """
    Base model class for common provider settings like credentials
    """
    class Type(Enum):
        SECRET_INPUT = CommonParameterType.SECRET_INPUT.value
        TEXT_INPUT = CommonParameterType.TEXT_INPUT.value
        SELECT = CommonParameterType.SELECT.value
        BOOLEAN = CommonParameterType.BOOLEAN.value
        APP_SELECTOR = CommonParameterType.APP_SELECTOR.value
        MODEL_CONFIG = CommonParameterType.MODEL_CONFIG.value

        @classmethod
        def value_of(cls, value: str) -> "ProviderConfig.Type":
            """
            Get value of given mode.

            :param value: mode value
            :return: mode
            """
            for mode in cls:
                if mode.value == value:
                    return mode
            raise ValueError(f'invalid mode value {value}')

        @staticmethod
        def default(value: str) -> str:
            return ""
    
    type: Type = Field(..., description="The type of the credentials")
    name: str = Field(..., description="The name of the credentials")

class ProviderConfig(BasicProviderConfig):
    """
    Model class for common provider settings like credentials
    """
    class Option(BaseModel):
        value: str = Field(..., description="The value of the option")
        label: I18nObject = Field(..., description="The label of the option")

    scope: AppSelectorScope | ModelConfigScope | None
    required: bool = False
    default: Optional[Union[int, str]] = None
    options: Optional[list[Option]] = None
    label: Optional[I18nObject] = None
    help: Optional[I18nObject] = None
    url: Optional[str] = None
    placeholder: Optional[I18nObject] = None