"""API 层的请求/响应数据模型（Pydantic）。

该文件集中定义后端 HTTP 接口的入参与返回结构，便于：
- 校验请求字段（长度、范围等）
- 生成 OpenAPI 文档
- 在路由层与前端之间形成稳定契约
"""

from __future__ import annotations

from datetime import datetime
from typing import Any

from pydantic import BaseModel, Field


class HealthResponse(BaseModel):
    """健康检查返回。"""

    status: str = "ok"


class SimulationStartRequest(BaseModel):
    """启动仿真的请求体。"""

    scenario: str | None = None
    weather: str | None = None
    time_period: str | None = None
    max_speed_kmh: int | None = Field(default=None, ge=0, le=300)
    duration_minutes: int | None = Field(default=None, ge=1, le=360)
    driver: str | None = None
    extra: dict[str, Any] = Field(default_factory=dict)


class SimulationStartResponse(BaseModel):
    simulation_id: str


class SimulationStopResponse(BaseModel):
    simulation_id: str
    status: str


class TokenResponse(BaseModel):
    """登录成功后返回的 token 信息。"""

    access_token: str
    token_type: str = "bearer"
    expires_in: int


class LoginRequest(BaseModel):
    """用户名密码登录请求。"""

    username: str = Field(min_length=1, max_length=64)
    password: str = Field(min_length=1, max_length=128)


class RoleCreateRequest(BaseModel):
    """创建角色请求。"""

    role_id: str | None = Field(default=None, max_length=64)
    role_name: str = Field(min_length=1, max_length=64)
    role_desc: str | None = Field(default=None, max_length=255)
    is_active: bool = True
    extra: dict[str, Any] | None = None


class RoleUpdateRequest(BaseModel):
    role_name: str | None = Field(default=None, max_length=64)
    role_desc: str | None = Field(default=None, max_length=255)
    is_active: bool | None = None
    extra: dict[str, Any] | None = None


class RoleResponse(BaseModel):
    role_id: str
    role_name: str
    role_desc: str | None = None
    is_active: bool
    created_at: datetime | None = None
    updated_at: datetime | None = None
    extra: dict[str, Any] | None = None


class PermissionCreateRequest(BaseModel):
    """创建权限点请求（perm_code 支持自定义命名规则）。"""

    perm_code: str = Field(min_length=1, max_length=128)
    perm_name: str = Field(min_length=1, max_length=128)
    perm_group: str | None = Field(default=None, max_length=64)
    perm_desc: str | None = Field(default=None, max_length=255)


class PermissionResponse(BaseModel):
    perm_code: str
    perm_name: str
    perm_group: str | None = None
    perm_desc: str | None = None
    created_at: datetime | None = None


class RolePermissionsUpdateRequest(BaseModel):
    perm_codes: list[str] = Field(default_factory=list)


class RolePermissionsResponse(BaseModel):
    role_id: str
    perm_codes: list[str]


class UserCreateRequest(BaseModel):
    """创建用户请求（包含明文密码，服务端将保存为哈希）。"""

    user_id: str | None = Field(default=None, max_length=64)
    username: str = Field(min_length=1, max_length=64)
    display_name: str | None = Field(default=None, max_length=64)
    password: str = Field(min_length=1, max_length=128)
    role_id: str = Field(min_length=1, max_length=64)
    is_active: bool = True
    extra: dict[str, Any] | None = None


class UserUpdateRequest(BaseModel):
    display_name: str | None = Field(default=None, max_length=64)
    role_id: str | None = Field(default=None, max_length=64)
    is_active: bool | None = None
    extra: dict[str, Any] | None = None


class UserPasswordUpdateRequest(BaseModel):
    new_password: str = Field(min_length=1, max_length=128)


class UserResponse(BaseModel):
    user_id: str
    username: str
    display_name: str | None = None
    role_id: str
    role_name: str | None = None
    is_active: bool
    last_login_at: datetime | None = None
    created_at: datetime | None = None
    updated_at: datetime | None = None
    extra: dict[str, Any] | None = None


class MeResponse(BaseModel):
    """当前登录用户信息返回。"""

    user: UserResponse


class LoginResponse(BaseModel):
    token: TokenResponse
    user: UserResponse


class BootstrapRequest(BaseModel):
    """系统首次初始化请求（仅允许在系统尚无任何用户时调用）。"""

    username: str = Field(min_length=1, max_length=64)
    password: str = Field(min_length=1, max_length=128)
    display_name: str | None = Field(default=None, max_length=64)


class BootstrapResponse(BaseModel):
    token: TokenResponse
    user: UserResponse


class UnityInitConfigRequest(BaseModel):
    payload: dict[str, Any]


class UnityInitConfigResponse(BaseModel):
    simulation_id: str


class UnityCommandRequest(BaseModel):
    payload: dict[str, Any]


class UnityCommandResponse(BaseModel):
    ok: bool = True