"""API 层 Pydantic 请求体。

注意：``/api/chat`` 本身**没有** Pydantic 请求体——它是 multipart/form-data
（为了带文件上传），字段用 FastAPI 的 ``Form``/``File`` 声明。1.5 也是这个
形状，保持一致以免前端要改。本文件只放 JSON 体的接口模型。
"""

from __future__ import annotations

from typing import Any

from pydantic import BaseModel, Field


class ResumeRequest(BaseModel):
    """中断恢复请求（字段与 1.5 逐字对齐）。

    2.0 内部把它翻译成官方 HITL 的 ``{"decisions": [...]}``，翻译逻辑见
    ``api/chat_routes._to_official_resume``。
    """

    session_id: str = Field(..., description="会话 ID")
    thread_id: str | None = Field(None, description="LangGraph 线程 ID（服务端强制等于 session_id）")
    answers: list[str] | None = Field(
        None, description="提问卡的用户答案列表（与问题一一对应）"
    )
    status: str = Field(
        "answered", description="响应状态：answered / cancelled / error"
    )
    error: str | None = Field(None, description="错误详情（status=error 时可选）")
    approved: bool | None = Field(None, description="工具审批：是否批准本次工具调用")
    remember: bool = Field(
        False, description="工具审批：是否长期允许（2.0 骨架未实现长期规则，收到即忽略）"
    )
    user_name: str | None = Field(None, description="归属用户，缺省 default")


class ModeUpdateRequest(BaseModel):
    """会话权限模式。"""

    mode: str = Field(..., description="plan | full")


class PinUpdateRequest(BaseModel):
    """会话置顶。"""

    pinned: bool = Field(..., description="是否置顶")


class TitleUpdateRequest(BaseModel):
    """会话标题。"""

    title: str = Field(..., max_length=255, description="新标题")


class ThinkingUpdateRequest(BaseModel):
    """思考级别切换。"""

    level: str = Field(..., description="off | high | highest")


class PreferenceRequest(BaseModel):
    """用户偏好写入。"""

    key: str = Field(..., max_length=128, description="偏好键")
    value: str = Field(..., description="偏好值")


class ScheduleCreateRequest(BaseModel):
    """新建定时任务。"""

    title: str = Field("", max_length=255, description="任务标题")
    cron: str = Field(..., max_length=64, description="5 段 cron 表达式，如 '0 9 * * *'")
    prompt: str = Field(..., description="触发时喂给 agent 的指令")
    mode: str = Field("full", description="plan | full")
    enabled: bool = Field(True, description="是否立即启用")
    user_name: str | None = Field(None, description="归属用户，缺省 default")


class ScheduleUpdateRequest(BaseModel):
    """更新定时任务（只传要改的字段）。"""

    title: str | None = Field(None, max_length=255)
    cron: str | None = Field(None, max_length=64)
    prompt: str | None = None
    mode: str | None = None
    enabled: bool | None = None


class QuotaUpdateRequest(BaseModel):
    """调整每日额度。"""

    user_name: str | None = Field(None, description="归属用户，缺省 default")
    limit_tokens: int = Field(..., ge=0, description="每日 token 上限，0 = 不限")


class ErrorPayload(BaseModel):
    """错误响应的统一载荷（与 1.5 的 {code,message} 契约一致）。"""

    code: str
    message: str
    detail: dict[str, Any] | None = None