"""LLM 模型枚举与实例获取

Usage:
    from app.ai.models import LLM

    llm = LLM.DOUBAO_PRO_256K.create(temperature=0)
    llm = LLM.DEEPSEEK_V3.create()
"""

from enum import Enum

from langchain_openai import ChatOpenAI

from app.config import settings

# 供应商连接配置
_VOLCENGINE = (lambda: settings.volcengine_api_key, lambda: settings.volcengine_base_url)
_JIAYU = (lambda: settings.jiayu_api_key, lambda: settings.jiayu_base_url)
_JIEKOU = (lambda: settings.jiekou_api_key, lambda: settings.jiekou_base_url)



class LLM(Enum):
    """所有可用模型，每个枚举值 = (模型名, api_key函数, base_url函数)"""

    # 火山引擎

    DOUBAO_PRO_32K = ("doubao-1-5-pro-32k-250115", *_VOLCENGINE)
    DOUBAO_LITE_32K = ("doubao-1-5-lite-32k-250115", *_VOLCENGINE)
    DEEPSEEK_V3 = ("deepseek-v3-250324", *_VOLCENGINE)
    DEEPSEEK_R1 = ("deepseek-r1-250528", *_VOLCENGINE)
    DOUBAO_SEED_MINI = ("doubao-seed-2-0-mini-260215", *_VOLCENGINE)
    DOUBAO_SEED_LITE = ("doubao-seed-2-0-lite-260215", *_VOLCENGINE)
    DOUBAO_SEED_PRO = ("doubao-seed-2-0-pro-260215", *_VOLCENGINE)

    # jiekou
    GPT_4O = ("gpt-4o", *_JIAYU)
    GPT_4O_MINI = ("gpt-4o-mini", *_JIEKOU)
    GEMINI_FLASH = ("gemini-2.5-flash", *_JIEKOU)

    # 加鱼
    JIAYU_CLAUDE_SONNET_4_5 = ("claude-sonnet-4.5", *_JIAYU)
    JIAYU_CLAUDE_HAIKU_4_5 = ("claude-haiku-4.5", *_JIAYU)
    JIAYU_DEEPSEEK_3_2 = ("deepseek-3.2", *_JIAYU)
    JIAYU_GLM_5 = ("glm-5", *_JIAYU)
    JIAYU_QWEN3_CODER_NEXT = ("qwen3-coder-next", *_JIAYU)
    JIAYU_MINIMAX_M2_5 = ("minimax-m2.5", *_JIAYU)


    def __init__(self, model_name: str, api_key_fn, base_url_fn):
        self.model_name = model_name
        self._api_key_fn = api_key_fn
        self._base_url_fn = base_url_fn

    def create(self, **kwargs) -> ChatOpenAI:
        """创建 LLM 实例，kwargs 透传给 ChatOpenAI（temperature, max_tokens 等）"""
        return ChatOpenAI(
            model=self.model_name,
            api_key=self._api_key_fn(),
            base_url=self._base_url_fn(),
            **kwargs,
        )