"""
工具系统域类型定义
"""

from dataclasses import dataclass, field
from typing import TYPE_CHECKING, Any, Literal

from pydantic import BaseModel, ConfigDict, Field

from zhenxun.services.ai.core.messages import ToolCallPart, UsageInfo
from zhenxun.services.ai.run.context import RunContext
from zhenxun.utils.pydantic_compat import model_dump, model_validate

if TYPE_CHECKING:
    from zhenxun.services.ai.tools.core.tool import BaseTool


class DirectivePayload(BaseModel):
    """工具执行产生的副作用控制流指令载荷"""

    name: str
    """指令名称，对应 directive_manager 中的注册名"""
    payload: dict[str, Any] = Field(default_factory=dict)
    """传递给指令处理器的具体数据"""


class ToolResult(BaseModel):
    """结构化的工具执行结果模型"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    output: Any = Field(...)
    """大模型实际看到的执行结果，可以是字符串、字典等序列化对象。"""
    usage: UsageInfo | None = Field(default=None)
    """子智能体或复杂工具消耗的 Token 统计，将向主流程冒泡累加。"""
    is_error: bool = Field(default=False)
    """是否发生了业务级别的错误"""
    is_retryable: bool = Field(default=True)
    """标记该错误是否允许大模型进行自愈反思重试"""
    directive: DirectivePayload | None = Field(default=None)
    """工具执行产生的副作用指令（如移交、结束运行等），供底层的指令路由引擎调度"""

    def as_error(self, is_retryable: bool = True) -> "ToolResult":
        """链式方法：标记此结果为错误，并引导大模型在下一轮进行重试自愈"""
        self.is_error = True
        self.is_retryable = is_retryable
        return self

    def as_fatal(self) -> "ToolResult":
        """链式方法：标记此结果为致命错误，立即中断大模型的思考"""
        self.is_error = True
        self.is_retryable = False
        return self


class EndRunResult(ToolResult):
    """强制结束运行并返回结果给用户"""

    def __init__(self, output: Any, **kwargs):
        super().__init__(
            output=output,
            directive=DirectivePayload(name="end_run", payload={"output": output}),
            **kwargs,
        )


class HandoffResult(ToolResult):
    """触发智能体控制权物理移交"""

    def __init__(self, target: str, reason: str = "", context_data: Any = "", **kwargs):
        super().__init__(
            output=f"已触发控制权移交 -> {target}。原因: {reason}",
            directive=DirectivePayload(
                name="handoff",
                payload={
                    "target": target,
                    "reason": reason,
                    "context_data": context_data,
                },
            ),
            **kwargs,
        )


class StructuredSubmissionResult(ToolResult):
    """提交结构化解析结果并结束运行"""

    def __init__(self, output: Any, parsed_obj: Any, **kwargs):
        super().__init__(
            output=output,
            directive=DirectivePayload(
                name="submit_structured", payload={"parsed_obj": parsed_obj}
            ),
            **kwargs,
        )


class StateSyncResult(ToolResult):
    """
    状态同步结果模型。
    除了返回工具输出外，允许开发者向大模型发送一条“系统通知”，系统会自动将其追加到上下文中，防止大模型产生幻觉。
    """

    state_notice: str | None = Field(default=None)
    """状态同步通知文本，将被自动转化为 SystemPrompt 发送给大模型。"""

    def with_state_notice(self, notice: str) -> "StateSyncResult":
        """链式方法：设置状态同步通知"""
        self.state_notice = notice
        return self


class ToolResultChunk(BaseModel):
    """流式工具执行结果片段模型"""

    content: str = Field(...)
    """流式输出的文本片段"""
    status: str = Field(default="running")
    """当前状态 (如 running, finished)"""
    metadata: dict[str, Any] | None = Field(default=None)
    """携带的附加数据 (如进度比例、图片等)"""


class ToolOptions(BaseModel):
    """工具的高阶配置选项"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    silent: bool = Field(default=False)
    """是否静默执行，工具执行过程与结果不会作为界面流渲染给用户。"""
    strict: bool = Field(default=False)
    """是否开启严格的 JSON Schema 验证模式，开启后大模型的参数将不接受额外属性。"""
    max_usage_count: int | None = Field(default=None)
    """单次 Agent 会话中的最大允许调用次数，用于防止大模型陷入死循环调用。"""
    capabilities: list[Any] = Field(default_factory=list)
    """当前工具专属的生命周期拦截器 (Capabilities) 列表。"""
    metadata: dict[str, Any] = Field(default_factory=dict)
    """额外扩展元数据字典，可供其他系统或自定义中间件读取。"""
    sandbox_requirements: dict[str, list[str]] | None = Field(default=None)
    """声明该工具在沙箱中执行时的环境依赖要求。"""
    tags: list[str] = Field(default_factory=list)
    """用于智能字符串路由和能力聚合的标签列表。"""
    max_retries: int | None = Field(default=None)
    """工具级别的局部重试上限。优先级高于全局配置。"""
    args_schema: type[BaseModel] | None = Field(default=None)
    """工具的 Pydantic 数据模型约束。大模型将以此 Schema 输出 JSON。"""
    require_intent: bool = Field(default=False)
    """是否强制要求大模型在调用此工具时提供意图 (_intent)。
    有助于减少幻觉和提高调用准确率。
    """
    concurrency: Literal["shared", "exclusive"] = Field(default="shared")
    """工具在批量调用时的并发策略。
    shared 可与其他 shared 并行，exclusive 会阻塞前后工具的执行。
    """

    def merge(self, other: "ToolOptions | None") -> "ToolOptions":
        """组合模式底层：合并另一个 ToolOptions，other 中的非默认值将覆盖当前值"""
        if not other:
            return self
        merged_data = model_dump(self, exclude_unset=False)
        other_data = model_dump(other, exclude_unset=True)

        if other.capabilities:
            merged_data["capabilities"] = self.capabilities + other.capabilities
        if other.metadata:
            merged_data["metadata"] = {**self.metadata, **other.metadata}
        if other.tags:
            merged_data["tags"] = list(set(self.tags + other.tags))

        for k, v in other_data.items():
            if k not in ("capabilities", "metadata", "tags"):
                merged_data[k] = v
        return model_validate(ToolOptions, merged_data)


class ToolkitConfig(BaseModel):
    """工具箱全局配置对象 (用于声明式配置解析)"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    prefix: str | None = Field(default=None)
    """工具名称前缀"""
    include: list[str] | None = Field(default=None)
    """允许注册的工具名白名单"""
    exclude: list[str] | None = Field(default=None)
    """排除注册的工具名黑名单"""
    shared_options: ToolOptions | None = Field(default=None)
    """所有子工具默认继承的高阶配置项"""


class ToolOverride(BaseModel):
    """工具配置动态覆盖载体"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    name: str
    """要覆盖的目标工具名称（在全局注册表或 Provider 中的原始名称）"""

    new_name: str | None = None
    """克隆后的新工具名称。如果为空，则保持原名称"""

    description: str | None = None
    """覆盖后的新描述。大模型将根据此新描述决定工具调用时机"""

    options: ToolOptions | None = None
    """用于覆盖该工具底层行为的高阶配置项"""

    def to_tool_options(self) -> ToolOptions:
        return self.options or ToolOptions()

    async def resolve(self, context: RunContext | None = None) -> "ResolvedToolPayload":
        from zhenxun.services.ai.tools.engine.registry import tool_provider_manager
        from zhenxun.services.ai.tools.models import ResolvedToolPayload
        from zhenxun.services.log import logger

        found_tools = await tool_provider_manager.resolve_specific_tools([self.name])
        if found_tools:
            base_tool = found_tools[0]
            if hasattr(base_tool, "clone_with_options"):
                cloned_tool = base_tool.clone_with_options(self)
                if hasattr(cloned_tool, "resolve"):
                    return await cloned_tool.resolve(context)
                return ResolvedToolPayload(tools=[cloned_tool])
            else:
                logger.warning(f"工具 {self.name} 不支持动态覆盖，将原样装配。")
                if hasattr(base_tool, "resolve"):
                    return await base_tool.resolve(context)
                return ResolvedToolPayload(tools=[base_tool])

        logger.warning(f"ToolOverride 找不到目标基础工具: {self.name}")
        return ResolvedToolPayload()


class GlobalToolFilter(BaseModel):
    """全局宏观工具过滤器"""

    allowed_servers: list[str] | None = None
    """仅允许的服务端名称列表"""
    excluded_servers: list[str] | None = None
    """需要排除的服务端名称列表"""


class ValidatedToolCall(BaseModel):
    """工具调用验证结果载体（解耦验证与执行）"""

    model_config = ConfigDict(arbitrary_types_allowed=True)

    call: ToolCallPart = Field(...)
    """原始工具调用部件"""
    tool: Any | None = Field(default=None)
    """匹配到的目标工具实例"""
    args_valid: bool = Field(default=False)
    """参数是否成功通过校验"""
    validated_args: dict[str, Any] | None = Field(default=None)
    """通过验证并反序列化后的参数字典"""
    validation_error: BaseException | None = Field(default=None)
    """验证失败时的异常信息"""
    intent: str | None = Field(default=None)
    """从参数中剥离出的大模型调用意图 (_intent)"""


class Query(BaseModel):
    """
    工具的声明式查询对象。
    用于在 Agent 中精确或批量筛选加载特定命名空间、特定标签的工具。
    """

    name: str | None = Field(default=None)
    """如果提供，则必须与工具的名称完全一致。"""
    tags: list[str] | None = Field(default=None)
    """如果提供，则工具必须包含这里列出的所有标签 (交集/AND匹配)。"""
    namespace: str | None = Field(default=None)
    """必填(由系统补充或显式声明)。限制搜索的插件命名空间，'global' 将跨全插件搜索。"""
    metadata_filter: dict[str, Any] | None = Field(default=None)
    """如果提供，则工具的 metadata 必须包含这里列出的所有键值对。"""

    def match(self, tool: "BaseTool") -> bool:
        """判断某个工具或工具箱是否符合当前 Query 的筛选条件"""
        if self.name:
            tool_name = getattr(tool, "name", getattr(tool, "__class__", type).__name__)
            if tool_name != self.name:
                return False
        if self.tags:
            tool_config = getattr(tool, "config", None)
            if (
                tool_config
                and hasattr(tool_config, "shared_options")
                and tool_config.shared_options
            ):
                tool_tags = tool_config.shared_options.tags
            else:
                tool_settings = getattr(tool, "settings", None)
                tool_tags = getattr(tool_settings, "tags", []) if tool_settings else []
            if not all(tag in tool_tags for tag in self.tags):
                return False

        if self.metadata_filter:
            tool_settings = getattr(tool, "settings", None)
            tool_metadata = (
                getattr(tool_settings, "metadata", getattr(tool, "metadata", {}))
                if tool_settings
                else getattr(tool, "metadata", {})
            )
            for k, v in self.metadata_filter.items():
                if tool_metadata.get(k) != v:
                    return False
        return True


@dataclass
class ResolvedToolPayload:
    """解析后的工具上下文包"""

    tools: list[Any] = field(default_factory=list)
    injected_prompts: list[str] = field(default_factory=list)
    toolkits: list[Any] = field(default_factory=list)


__all__ = [
    "GlobalToolFilter",
    "Query",
    "ResolvedToolPayload",
    "ToolOptions",
    "ToolOverride",
    "ToolResult",
    "ToolResultChunk",
    "ToolkitConfig",
    "ValidatedToolCall",
]