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


# Post schemas
class CreatePostRequest(BaseModel):
    username: str
    content: str


class UpdatePostRequest(BaseModel):
    username: str
    content: str


class Post(BaseModel):
    id: str
    username: str
    content: str
    created_at: datetime = Field(alias="createdAt")
    updated_at: datetime = Field(alias="updatedAt")
    likes_count: int = Field(alias="likesCount")
    comments_count: int = Field(alias="commentsCount")

    class Config:
        populate_by_name = True
        from_attributes = True


# Comment schemas
class CreateCommentRequest(BaseModel):
    username: str
    content: str


class UpdateCommentRequest(BaseModel):
    username: str
    content: str


class Comment(BaseModel):
    id: str
    post_id: str = Field(alias="postId")
    username: str
    content: str
    created_at: datetime = Field(alias="createdAt")
    updated_at: datetime = Field(alias="updatedAt")

    class Config:
        populate_by_name = True
        from_attributes = True


# Like schemas
class LikeRequest(BaseModel):
    username: str


class Like(BaseModel):
    post_id: str = Field(alias="postId")
    username: str
    created_at: datetime = Field(alias="createdAt")

    class Config:
        populate_by_name = True
        from_attributes = True


# Error schema
class Error(BaseModel):
    message: str
    details: Optional[str] = None