#  Copyright 2026 zhaoxi826
#
#  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.
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from pydantic_ai import Agent
from pydantic_ai.models.openai import OpenAIChatModel
from pydantic_ai.models.google import GoogleModel
from pydantic_ai.models.anthropic import AnthropicModel
from pydantic_ai.providers.openai import OpenAIProvider
from pydantic_ai.providers.google import GoogleProvider
from pydantic_ai.providers.anthropic import AnthropicProvider
from pretor.core.global_state_machine.model_provider import Provider
from pretor.utils.agent_model import ResponseModel, DepsModel
from pretor.utils.error import ModelNotExistError

class AgentFactory:
    def __init__(self):
        self._models_mapping = {"openai": (OpenAIChatModel, OpenAIProvider), "gemini": (GoogleModel, GoogleProvider), "claude": (AnthropicModel, AnthropicProvider)}

    def create_agent(self,
                     provider: Provider,
                     model_id: str,
                     output_type: ResponseModel,
                     system_prompt: str,
                     deps_type: DepsModel,
                     agent_name: str) -> Agent:
        """
            create_agent方法，将输入的provider对象实例化为一个pydantic-ai的agent对象

        Args:
            provider: Provider对象，从global_state_machine中获取
            model_id: 模型名
            output_type: 输出格式
            system_prompt: 系统提示词
            deps_type: 依赖类型，在agent运行时动态输入的格式化消息
            agent_name: agent的名字

        Returns:
            返回被实例化的pydantic-ai的Agent对象
        """
        if model_id not in provider.provider_models:
            raise ModelNotExistError("模型不存在")
        if provider.provider_type not in self._models_mapping:
            raise ValueError(f"不支持的协议类型: {provider.provider_type}")
        model_class, provider_class = self._models_mapping[provider.provider_type]
        model = model_class(model_id, provider_class(api_key=provider.api_key, url=provider.url))
        agent = Agent(model=model,
                      name=agent_name,
                      system_prompt=system_prompt,
                      output_type=output_type,
                      deps_type=deps_type)
        return agent