"""后台管理 API 请求/响应模型"""
from datetime import datetime
from typing import Any, Dict, List, Optional

from pydantic import BaseModel, EmailStr, Field


class EnterpriseResponse(BaseModel):
    id: int
    name: str
    code: Optional[str] = None
    ai_display_name: str = Field(..., description="AI 助手对外展示名称（系统提示词等）")
    created_at: Optional[datetime] = None


class EnterpriseUpdate(BaseModel):
    name: str = Field(..., min_length=1, max_length=255)
    ai_display_name: str = Field(
        ...,
        min_length=1,
        max_length=128,
        description="AI 助手名称，将进入各模式系统提示词",
    )


class DepartmentCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=255)
    parent_id: Optional[int] = None


class DepartmentUpdate(BaseModel):
    name: Optional[str] = Field(None, min_length=1, max_length=255)
    parent_id: Optional[int] = None


class DepartmentSetLeader(BaseModel):
    leader_user_id: Optional[int] = Field(None, description="负责人 user_id，传 null 表示清除")


class DepartmentResponse(BaseModel):
    id: int
    enterprise_id: int
    name: str
    parent_id: Optional[int] = None
    leader_user_id: Optional[int] = None
    leader_name: Optional[str] = None
    created_at: Optional[datetime] = None


class AdminUserCreate(BaseModel):
    username: str = Field(..., max_length=50)
    email: EmailStr
    phone: str = Field(..., max_length=255)
    password: str = Field(..., min_length=6)
    display_name: Optional[str] = Field(None, max_length=100)
    department_id: Optional[int] = None
    role: str = Field("employee", description="admin | leader | employee")


class AdminUserUpdate(BaseModel):
    email: Optional[EmailStr] = None
    phone: Optional[str] = Field(None, max_length=255)
    display_name: Optional[str] = Field(None, max_length=100)
    department_id: Optional[int] = None
    role: Optional[str] = Field(None, description="admin | leader | employee")
    is_active: Optional[bool] = None
    password: Optional[str] = Field(None, min_length=6)
    allow_kb_upload: Optional[bool] = None


class UserPermissionUpdate(BaseModel):
    """领导更新下属权限（仅 allow_kb_upload）"""
    allow_kb_upload: bool


class AdminUserListItem(BaseModel):
    id: int
    username: str
    email: str
    phone: str
    display_name: Optional[str] = None
    enterprise_id: int
    department_id: Optional[int] = None
    role: str
    is_active: bool
    is_first_login: bool = True
    allow_kb_upload: bool = True
    created_at: Optional[datetime] = None
    last_login_at: Optional[datetime] = None


class AdminUserListResponse(BaseModel):
    total: int
    items: list[AdminUserListItem]


# ── 审计日志 ──────────────────────────────────

class AuditLogItem(BaseModel):
    id: int
    enterprise_id: int
    actor_id: int
    actor_name: Optional[str] = None
    action: str
    target_user_id: Optional[int] = None
    target_name: Optional[str] = None
    department_id: Optional[int] = None
    department_name: Optional[str] = None
    kb_id: Optional[int] = None
    kb_name: Optional[str] = None
    file_id: Optional[int] = None
    file_name: Optional[str] = None
    ip: Optional[str] = None
    metadata: Optional[Any] = None
    created_at: Optional[datetime] = None


class AuditLogListResponse(BaseModel):
    total: int
    items: List[AuditLogItem]


# ── 团队成员（领导视角） ──────────────────────

class TeamMemberItem(BaseModel):
    id: int
    username: str
    display_name: Optional[str] = None
    department_id: Optional[int] = None
    department_name: Optional[str] = None
    role: str
    is_active: bool
    allow_kb_upload: bool
    created_at: Optional[datetime] = None