"""面向前端的请求/响应 DTO。与 DB 模型解耦,**响应里的 key 一律打码**。

凭证 DTO 字段对齐前端 ComponentsModelsPage 的 ModelResource:
JSON 用 camelCase(modelId/interfaceType/apiUrl/apiKey),Python 内部用 snake_case,
靠 Pydantic alias 自动互转。FastAPI 响应默认 by_alias=True,所以出参也是 camelCase。
"""

from __future__ import annotations

from typing import Literal

from pydantic import BaseModel, ConfigDict
from pydantic.alias_generators import to_camel

RuntimeMode = Literal["pipeline", "realtime"]
ModelType = Literal["LLM", "ASR", "TTS", "Realtime", "Embedding"]
InterfaceType = Literal["openai", "xfyun", "dashscope", "gemini"]


class CamelModel(BaseModel):
    """JSON camelCase ↔ Python snake_case。protected_namespaces 关掉以允许 model_id。"""

    model_config = ConfigDict(
        alias_generator=to_camel,
        populate_by_name=True,
        protected_namespaces=(),
    )


# ---------- 助手 ----------
class AssistantUpsert(CamelModel):
    name: str
    greeting: str = ""
    prompt: str = ""
    runtime_mode: RuntimeMode = "pipeline"
    model: str = ""
    asr: str = ""
    voice: str = ""
    enable_interrupt: bool = True


class AssistantOut(AssistantUpsert):
    id: str
    updated_at: str | None = None


# ---------- 模型凭证(对齐前端 ModelResource) ----------
class CredentialUpsert(CamelModel):
    name: str = ""                              # 资源名称
    model_id: str = ""                          # 模型ID
    type: ModelType                             # LLM/ASR/TTS/Realtime/Embedding
    interface_type: InterfaceType = "openai"    # openai/xfyun/dashscope/gemini
    api_url: str = ""
    api_key: str = ""                           # 写时:占位符/空表示不改
    is_default: bool = False


class CredentialOut(CamelModel):
    id: str
    name: str
    model_id: str
    type: str
    interface_type: str
    api_url: str
    api_key: str                                # 读时:打码后的值
    is_default: bool