from typing import Optional

from pydantic import BaseModel, Field, field_validator, ConfigDict
from datetime import datetime


class BlogQuery(BaseModel):
    """博客查询参数"""
    category: Optional[str] = Field(None, description="分类名称")
    title: Optional[str] = Field(None, description="标题关键词")
    year: Optional[int] = Field(None, description="发布年份", ge=2000, le=datetime.now().year)

    @field_validator('year')
    def validate_year(cls, v):
        if v is not None and v > datetime.now().year:
            raise ValueError('年份不能超过当前年份')
        return v


class BlogBase(BaseModel):
    """博客基础模型"""
    title: str = Field(..., min_length=1, max_length=255, description="博客标题")
    top_value: int = Field(default=0, ge=0, description="置顶值，越大越靠前", alias="topValue")
    is_great: bool = Field(default=False, description="是否是精品", alias="isGreat")
    category: str = Field(..., min_length=1, max_length=45, description="分类名称")
    content: Optional[str] = Field(None, description="博客内容")
    is_approved: bool = Field(default=False, description="是否已发布", alias="isApproved")

    @field_validator('title')
    def title_not_empty(cls, v):
        if not v or not v.strip():
            raise ValueError('标题不能为空')
        return v.strip()

    @field_validator('category')
    def category_not_empty(cls, v):
        if not v or not v.strip():
            raise ValueError('分类不能为空')
        return v.strip()


class BlogCreate(BlogBase):
    pass


class BlogUpdate(BlogBase):
    pass


class BlogResponse(BlogBase):
    id: int = Field(..., description="博客ID")
    summary: Optional[str] = Field(None, description="内容摘要")
    word_count: Optional[int] = Field(None, description="字数统计", alias="wordCount")
    read_duration: Optional[float] = Field(None, description="阅读时长", alias="readDuration")
    visit_count: Optional[int] = Field(0, description="访问次数", alias="visitCount")
    create_time: datetime = Field(..., description="创建时间", alias="createTime")
    update_time: datetime = Field(..., description="更新时间", alias="updateTime")

    model_config = ConfigDict(
        from_attributes=True,
        populate_by_name=True,
        json_encoders={
            datetime: lambda dt: dt.strftime('%Y-%m-%d %H:%M:%S')
        }
    )


class BlogCategoryResponse(BaseModel):
    name: str = Field(..., description="分类名称")
    count: int = Field(..., description="博客数量")

    model_config = ConfigDict(
        from_attributes=True,
        populate_by_name=True
    )


class BlogStatsResponse(BaseModel):
    blog_count: int = Field(..., description="博客总数", alias="blogCount")
    category_count: int = Field(..., description="分类总数", alias="categoryCount")
    word_count: int = Field(..., description="总字数", alias="wordCount")


class BlogVisitResponse(BaseModel):
    ip: str = Field(..., description="IP地址")
    os: str = Field(..., description="操作系统")
    browser: str = Field(..., description="浏览器")
    uri: str = Field(..., description="访问路径")
    title: str = Field(None, description="博客标题")
    visit_time: datetime = Field(..., description="访问时间", alias="visitTime")

    model_config = ConfigDict(
        from_attributes=True,
        populate_by_name=True,
        json_encoders={
            datetime: lambda dt: dt.strftime('%Y-%m-%d %H:%M:%S')
        }
    )


class BlogLatestResponse(BaseModel):
    id: int = Field(..., description="博客ID")
    title: str = Field(..., description="博客标题")

    model_config = ConfigDict(
        from_attributes=True,
        populate_by_name=True
    )


class BlogAdjacentResponse(BaseModel):
    id: int = Field(..., description="博客ID")
    title: str = Field(..., description="博客标题")

    model_config = ConfigDict(
        from_attributes=True,
        populate_by_name=True
    )


class BlogCommentCreate(BaseModel):
    parent_id: int = Field(default=0, ge=0, description="父评论ID，0表示顶级评论", alias="parentId")
    name: str = Field(..., min_length=1, max_length=50, description="评论人昵称")
    website: Optional[str] = Field(None, description="评论人网站")
    content: str = Field(..., min_length=1, max_length=1000, description="评论内容")

    @field_validator('name')
    def name_not_empty(cls, v):
        if not v or not v.strip():
            raise ValueError('昵称不能为空')
        return v.strip()

    @field_validator('content')
    def content_not_empty(cls, v):
        if not v or not v.strip():
            raise ValueError('评论内容不能为空')
        return v.strip()


class BlogCommentResponse(BlogCommentCreate):
    id: int = Field(..., description="评论ID")
    ip_address: str = Field(..., description="IP地址", alias="ipAddress")
    user_agent: str = Field(..., description="浏览器信息", alias="userAgent")
    create_time: datetime = Field(..., description="创建时间", alias="createTime")

    model_config = ConfigDict(
        from_attributes=True,
        populate_by_name=True,
        json_encoders={
            datetime: lambda dt: dt.strftime('%Y-%m-%d %H:%M:%S')
        }
    )