"""
Pydantic 数据校验模型（Schemas）。

职责：
- 定义前后端 JSON 通信所需的数据结构
- 统一定义全局响应格式 {success, data, message}
"""

from datetime import datetime
from typing import Any, Optional

from pydantic import BaseModel, ConfigDict, Field


class UnifiedResponse(BaseModel):
    """全局统一响应格式：所有接口返回该结构。"""

    success: bool = True
    data: Optional[Any] = None
    message: str = ""


class UserCreate(BaseModel):
    """创建用户（注册）请求体：需携带邮箱验证码；角色固定为 visitor（后端强制）。"""

    email: str = Field(max_length=255)
    username: str = Field(min_length=2, max_length=50)
    password: str = Field(max_length=128)
    code: str = Field(default="", max_length=10, description="邮箱验证码（注册前通过 /api/email/send-code 获取）")


class UserOut(BaseModel):
    """用户信息输出（不含密码哈希）。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    email: str
    username: str
    role: str
    created_time: datetime


class LoginRequest(BaseModel):
    """登录请求体。"""

    email: str
    password: str


class TokenOut(BaseModel):
    """登录成功返回的 JWT 令牌与用户基础信息。"""

    token: str
    user_id: int
    username: str
    role: str


class UserLevelOut(BaseModel):
    """用户权限级别（角色）输出。"""

    user_id: int
    role: str


class ProfileOut(BaseModel):
    """个人资料输出（头像、简介等）。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    email: str
    username: str
    role: str
    avatar: Optional[str] = None
    bio: Optional[str] = None
    created_time: datetime


class BloggerProfileOut(BaseModel):
    """博主公开资料输出（我的简介页面使用）。"""

    username: str
    avatar: Optional[str] = None
    bio: Optional[str] = None
    role: str


class ProfileUpdate(BaseModel):
    """更新个人资料请求体（头像 / 简介，均可选）。"""

    avatar: Optional[str] = Field(default=None, max_length=500)
    bio: Optional[str] = Field(default=None, max_length=2000)


class SendCodeRequest(BaseModel):
    """发送邮箱验证码请求体。"""

    email: str
    purpose: str


class VerifyCodeRequest(BaseModel):
    """校验邮箱验证码请求体。"""

    email: str
    code: str
    purpose: str


class ForgotPasswordRequest(BaseModel):
    """忘记密码请求体。"""

    email: str


class ResetPasswordRequest(BaseModel):
    """重置密码请求体。"""

    email: str
    code: str
    new_password: str = Field(max_length=128)


class ArticleCreate(BaseModel):
    """创建文章请求体。"""

    title: str = Field(min_length=1, max_length=200)
    content: str = Field(min_length=1, max_length=200000)
    cover: Optional[str] = Field(default=None, max_length=500)
    visibility: str = "public"
    category: str = Field(default="life", description="分区：life 生活 / study 学习（取值由路由校验，统一 400 提示）")


class ArticleUpdate(BaseModel):
    """更新文章请求体（字段均可选，仅更新传入的字段）。"""

    title: Optional[str] = Field(default=None, min_length=1, max_length=200)
    content: Optional[str] = Field(default=None, min_length=1, max_length=200000)
    cover: Optional[str] = Field(default=None, max_length=500)
    visibility: Optional[str] = None
    category: Optional[str] = None


class ArticleOut(BaseModel):
    """文章信息输出。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    title: str
    content: str
    cover: Optional[str] = None
    visibility: str
    author_id: int
    created_time: datetime


class CommentCreate(BaseModel):
    """发表评论请求体（parent_id 用于回复，顶层评论不填）。"""

    article_id: int
    content: str = Field(min_length=1, max_length=5000)
    parent_id: Optional[int] = None


class CommentOut(BaseModel):
    """评论信息输出。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    article_id: int
    user_id: int
    parent_id: Optional[int] = None
    content: str
    created_time: datetime


class ProjectOut(BaseModel):
    """项目信息输出（在线演示 / GitHub 外链）。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    name: str
    description: Optional[str] = None
    tech: Optional[str] = None
    project_type: str
    visibility: str
    demo_url: Optional[str] = None
    download_url: Optional[str] = None
    github_url: Optional[str] = None
    created_time: datetime
    updated_time: datetime


class LikeCreate(BaseModel):
    """点赞请求体。"""

    article_id: int


class LikeOut(BaseModel):
    """点赞信息输出。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    article_id: int
    user_id: int


class FriendOut(BaseModel):
    """好友申请信息输出。"""

    model_config = ConfigDict(from_attributes=True)

    id: int
    user_id: int
    status: str