from agentscope.agent import AgentBase
from agentscope.agent._react_agent import ReActAgent
from agentscope.model import OpenAIChatModel
from agentscope.formatter import OpenAIChatFormatter
from agentscope.tool import Toolkit
from agentscope.message import Msg
from config import settings
from .memory.user_memory import UserIsolatedMemory
from .hooks.rbac_hook import register_rbac_hooks_for_user


class AgentFactory:
    _model: OpenAIChatModel | None = None
    _formatter: OpenAIChatFormatter | None = None
    _agent_cache: dict[str, AgentBase] = {}

    @classmethod
    def _get_model(cls) -> OpenAIChatModel:
        if cls._model is None:
            cls._model = OpenAIChatModel(
                config_name="enterprise_model",
                model_name=settings.LLM_MODEL,
                api_key=settings.LLM_API_KEY,
                api_base=settings.LLM_API_BASE,
            )
        return cls._model

    @classmethod
    def _get_formatter(cls) -> OpenAIChatFormatter:
        if cls._formatter is None:
            cls._formatter = OpenAIChatFormatter()
        return cls._formatter

    @classmethod
    async def create_agent(
        cls,
        agent_type: str,
        user_id: str,
        user_name: str,
        department_id: str | None = None,
    ) -> AgentBase:
        cache_key = f"{agent_type}_{user_id}"
        if cache_key in cls._agent_cache:
            return cls._agent_cache[cache_key]

        model = cls._get_model()
        formatter = cls._get_formatter()

        if agent_type == "employee":
            agent = await cls._create_employee_agent(user_id, user_name, department_id, model, formatter)
        elif agent_type == "manager":
            agent = await cls._create_manager_agent(user_id, user_name, model, formatter)
        elif agent_type == "task":
            agent = await cls._create_task_agent(user_id, user_name, model, formatter)
        elif agent_type == "document":
            agent = await cls._create_document_agent(user_id, user_name, model, formatter)
        else:
            agent = await cls._create_employee_agent(user_id, user_name, department_id, model, formatter)

        cls._agent_cache[cache_key] = agent
        return agent

    @classmethod
    async def _create_employee_agent(cls, user_id, user_name, department_id, model, formatter):
        from .tools.wecom_tools import send_notification
        from .tools.document_tools import parse_document, format_correction

        toolkit = Toolkit()
        toolkit.register_tool_function(send_notification)
        toolkit.register_tool_function(parse_document)
        toolkit.register_tool_function(format_correction)

        knowledge = None
        try:
            from modules.rag.knowledge import get_knowledge_base
            knowledge = get_knowledge_base()
        except Exception:
            pass

        agent = ReActAgent(
            name=f"EmployeeAI_{user_name}",
            sys_prompt=f"""你是 {user_name} 的专属AI工作助手。

你可以:
1. 回答工作中的问题，提供专业建议
2. 帮助处理文档，修正格式
3. 查询知识库获取信息
4. 发送通知给相关人员

重要约束:
- 只能访问该员工权限范围内的数据和工具
- 涉及敏感操作需要二次确认
- 始终保持专业和友好的态度""",
            model=model,
            formatter=formatter,
            toolkit=toolkit,
            knowledge=knowledge,
            memory=UserIsolatedMemory(user_id=user_id),
            max_iters=8,
        )

        register_rbac_hooks_for_user(agent, {
            "user_id": user_id,
            "user_name": user_name,
            "role": "employee",
            "department_id": department_id or "",
            "data_scope": "self_only",
        })

        return agent

    @classmethod
    async def _create_manager_agent(cls, user_id, user_name, model, formatter):
        from .tools.manager_tools import list_subordinates, get_employee_dashboard, generate_efficiency_report, get_task_statistics
        from .tools.wecom_tools import send_notification

        toolkit = Toolkit()
        toolkit.register_tool_function(list_subordinates)
        toolkit.register_tool_function(get_employee_dashboard)
        toolkit.register_tool_function(generate_efficiency_report)
        toolkit.register_tool_function(get_task_statistics)
        toolkit.register_tool_function(send_notification)

        agent = ReActAgent(
            name=f"ManagerAI_{user_name}",
            sys_prompt=f"""你是 {user_name} 的管理分析助手。

你可以:
1. 查看下属员工列表和工作数据 (list_subordinates, get_employee_dashboard)
2. 生成团队效率报告 (generate_efficiency_report)
3. 统计分析任务完成情况 (get_task_statistics)
4. 向下属发送企业微信通知提醒 (send_notification)

重要约束:
- 只能查看你的直接和间接下属的数据
- 不能查看非下属或跨部门员工的数据
- 生成报告时注意数据隐私""",
            model=model,
            formatter=formatter,
            toolkit=toolkit,
            memory=UserIsolatedMemory(user_id=user_id),
            max_iters=8,
        )

        register_rbac_hooks_for_user(agent, {
            "user_id": user_id,
            "user_name": user_name,
            "role": "dept_manager",
            "data_scope": "subordinate_only",
        })

        return agent

    @classmethod
    async def _create_task_agent(cls, user_id, user_name, model, formatter):
        from .tools.task_tools import list_tasks, create_task, get_task, update_task
        from .tools.wecom_tools import send_notification

        toolkit = Toolkit()
        toolkit.register_tool_function(list_tasks)
        toolkit.register_tool_function(create_task)
        toolkit.register_tool_function(get_task)
        toolkit.register_tool_function(update_task)
        toolkit.register_tool_function(send_notification)

        agent = ReActAgent(
            name=f"TaskAI_{user_name}",
            sys_prompt=f"""你是任务管理助手。帮助用户创建、跟踪和管理工作任务。

你可以:
1. 创建新任务并分配给指定人员 (create_task)
2. 查询任务状态和进度 (list_tasks, get_task)
3. 更新任务信息 (update_task)
4. 推送任务通知到企业微信 (send_notification)

重要约束:
- 创建任务前确保标题和负责人信息完整
- 修改任务状态前告知用户变更
- 优先级: low/medium/high/urgent""",
            model=model,
            formatter=formatter,
            toolkit=toolkit,
            memory=UserIsolatedMemory(user_id=user_id),
            max_iters=8,
        )

        return agent

    @classmethod
    async def _create_document_agent(cls, user_id, user_name, model, formatter):
        from .tools.document_tools import parse_document, format_correction

        toolkit = Toolkit()
        toolkit.register_tool_function(parse_document)
        toolkit.register_tool_function(format_correction)

        knowledge = None
        try:
            from modules.rag.knowledge import get_knowledge_base
            knowledge = get_knowledge_base()
        except Exception:
            pass

        agent = ReActAgent(
            name=f"DocAI_{user_name}",
            sys_prompt=f"""你是文档处理专家。帮助用户处理各类文档。

你可以:
1. 解析PDF/Word/Excel/PPT等格式
2. 修正文档格式
3. 提取文档关键信息
4. 从知识库中检索文档内容
5. 格式转换""",
            model=model,
            formatter=formatter,
            toolkit=toolkit,
            knowledge=knowledge,
            memory=UserIsolatedMemory(user_id=user_id),
            max_iters=8,
        )

        return agent