from pydantic import BaseModel, Field
from datetime import datetime
from typing import Any, Optional


class CommunityAuthorOut(BaseModel):
    id: int
    name: str = ""
    avatar: str = ""
    subject: str = ""
    school: str = ""

    model_config = {"from_attributes": True}


class PostCreate(BaseModel):
    title: str = Field(..., min_length=1, max_length=200)
    content: str = Field(..., min_length=1)
    post_type: str = "discussion"
    tags: list[str] = Field(default_factory=list)
    attachments: list[dict[str, Any]] = Field(default_factory=list)


class PostUpdate(BaseModel):
    title: Optional[str] = Field(None, min_length=1, max_length=200)
    content: Optional[str] = Field(None, min_length=1)
    post_type: Optional[str] = None
    tags: Optional[list[str]] = None
    attachments: Optional[list[dict[str, Any]]] = None


class PostOut(BaseModel):
    id: int
    user_id: int
    title: str
    content: str = ""
    post_type: str = "discussion"
    tags: list = Field(default_factory=list)
    attachments: list = Field(default_factory=list)
    views: int = 0
    likes: int = 0
    comments_count: int = 0
    is_pinned: int = 0
    is_favorited: bool = False
    author: CommunityAuthorOut | None = None
    created_at: datetime | None = None
    updated_at: datetime | None = None

    model_config = {"from_attributes": True}


class CommentCreate(BaseModel):
    content: str = Field(..., min_length=1)
    parent_id: Optional[int] = None


class CommentOut(BaseModel):
    id: int
    post_id: int
    user_id: int
    content: str
    parent_id: Optional[int] = None
    likes: int = 0
    author: CommunityAuthorOut | None = None
    created_at: datetime | None = None

    model_config = {"from_attributes": True}