"""
Agent 相关静态声明类型定义
"""

from collections.abc import Sequence
from typing import Any

from pydantic import BaseModel, ConfigDict, Field

from zhenxun.services.ai.context.memory.types import SessionMetadata
from zhenxun.services.ai.core.messages import (
    AgentMessage,
    ChatResponse,
    LLMMessage,
    ToolCallPart,
    UsageInfo,
)
from zhenxun.services.ai.core.options import GenerationConfig
from zhenxun.services.ai.flow.base import BaseRuntimeConfig
from zhenxun.services.ai.run import RunContext
from zhenxun.services.ai.tools.engine.registry import ToolCollection
from zhenxun.services.ai.tools.models import GlobalToolFilter
from zhenxun.utils.pydantic_compat import model_copy


class Persona(BaseModel):
    """智能体人设与上下文背景"""

    role: str = Field(...)
    """扮演的角色身份"""

    goal: str = Field(...)
    """角色的核心目标"""

    backstory: str | None = Field(default=None)
    """角色背景故事或性格设定"""

    model_config = ConfigDict(extra="ignore")  # type: ignore


class AgentConfig(BaseRuntimeConfig):
    """统一的智能体全局与单次运行配置 (Unification of Settings & Profile)"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    max_cycles: int = Field(default=10)
    """工具调用最大循环次数"""
    global_max_cycles: int | None = Field(default=None)
    """整个会话生命周期内的绝对最大循环次数上限（覆盖全局配置）。"""
    enable_parallel_calls: bool = Field(default=True)
    """允许并行工具调用"""
    reflexion_retries: int = Field(default=1)
    """反思重试次数"""
    enable_fallback_summary: bool = Field(default=True)
    """达到最大循环次数时，是否触发大模型兜底总结（而不是直接报错）"""
    enable_hitl: bool | None = Field(default=None)
    """是否允许智能体主动挂起任务，向用户求助 (Human-in-the-Loop)。
    若为 None 则跟随全局设置。
    """

    message_history: Sequence[AgentMessage] | None = Field(default=None)
    """初始化的底层对话历史记录。"""
    tool_filter: GlobalToolFilter | None = Field(default=None)
    """全局工具过滤器，限制本次运行可用的工具池。"""
    memory: Any | None = Field(default=None)
    """单次运行级别的记忆门面覆盖 (支持 bool, MemoryConfig, MemoryBuilder)。"""
    generation_config: GenerationConfig | None = Field(default=None)
    """单次运行覆盖的大模型生成配置。"""
    capabilities: list[Any] | None = Field(default=None)
    """仅针对本次运行动态注入的临时拦截器/能力组件列表。"""
    skills: Sequence[Any] | None = Field(default=None)
    """仅针对本次运行动态注入的临时技能集合。"""
    executor: Any | None = Field(default=None)
    """单次运行覆盖的核心执行引擎策略 (BaseAgentExecutor)。"""

    verbose_ui: bool = Field(default=False)
    """是否在 UI 前端展示细粒度的工具执行中间过程。
    在不支持流式更新的平台(如QQ)建议保持 False。"""

    def merge_with(self, other: "AgentConfig | dict | None") -> "AgentConfig":
        """深度合并另一份配置，生成一个新的覆盖实例"""

        if not other:
            return model_copy(self, deep=True)

        update_dict = {}
        if isinstance(other, dict):
            other_dict = {k: v for k, v in other.items() if v is not None}
        else:
            fields_set = getattr(
                other, "model_fields_set", getattr(other, "__fields_set__", set())
            )
            other_dict = {}
            for k in fields_set:
                val = getattr(other, k)
                if val is not None:
                    other_dict[k] = val

        for k, v in other_dict.items():
            if k in ("capabilities", "skills") and isinstance(v, list):
                base_list = getattr(self, k) or []
                update_dict[k] = base_list + v
            else:
                update_dict[k] = v

        return model_copy(self, update=update_dict, deep=True)


class AgentState(BaseModel):
    """大模型思考循环的有限状态机 (FSM) 流转状态"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    static_system_prompt: str | list[str] = ""
    """绝对不变的系统提示词（用于前缀缓存）"""
    dynamic_system_messages: list[LLMMessage] = Field(default_factory=list)
    """包含变量与实时状态的动态独立提示消息列表（绝对头部注入）"""
    tools: ToolCollection | None = None
    """当前轮次生效的、已完成鉴权和过滤的工具集合"""

    messages: list[AgentMessage] = Field(default_factory=list)
    """大模型将看到的完整历史消息列表 (执行历史)"""
    usage: UsageInfo = Field(default_factory=UsageInfo)
    """累计的 Token 消耗"""
    structured_result: Any | None = None
    """拦截到的结构化输出结果"""
    early_result_output: Any | None = None
    """拦截到的早期终止输出结果"""
    should_terminate: bool = False
    """标记是否应提前终止循环"""
    handoff_triggered: Any | None = None
    """标记是否触发了移交"""
    is_finished: bool = False
    """标记大模型循环是否彻底结束"""
    final_result: Any | None = None
    """最终的运行结果 (AgentRunResult)"""
    origin_msg_len: int = 0
    """初始进入循环时的消息历史长度 (用于增量保存记忆)"""
    current_cycle: int = 0
    """当前思考循环的轮次索引"""

    current_request_messages: list[AgentMessage] = Field(default_factory=list)
    """当前即将发往大模型的实际请求消息"""
    current_request_extra: dict[str, Any] = Field(default_factory=dict)
    """当前请求附加的Extra控制参数"""
    current_response: ChatResponse | None = None
    """大模型最新返回的响应实体"""
    current_tool_calls: list[ToolCallPart] = Field(default_factory=list)
    """当前轮次被提取出准备执行的客户端工具调用"""
    current_tool_results: list[Any] = Field(default_factory=list)
    """当前轮次工具执行的结果或异常收集"""


class AgentRunResources(BaseModel):
    """大模型执行过程中的全局静态资源与配置载体"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    run_context: RunContext
    """保留依赖注入(DI)与黑板引用的全局运行时上下文"""
    session_meta: SessionMetadata | None = None
    """隔离会话的元信息(Session ID, 命名空间, 权限等)"""
    memory_reader: Any | None = None
    """用于读取短/中/长期上下文记忆的读取器"""
    memory_writer: Any | None = None
    """用于将对话历史安全落盘的写入器"""
    run_scoped_cap: Any | None = None
    """聚合了 Agent/Task/全局 的复合能力拦截器 (CombinedCapability)"""
    task_obj: Any | None = None
    """(如有) 解析后的结构化数据任务契约"""
    toolkits: list[Any] = Field(default_factory=list)
    """当前轮次生效的工具箱列表 (需要执行生命周期挂载)"""
    config: AgentConfig = Field(default_factory=AgentConfig)
    """Agent 全局与运行时的统一策略配置"""
    generation_config: GenerationConfig | None = None
    """大模型生成配置"""
    model_name: str | None = None
    """当前实际调用的模型名称"""