"""Pydantic schemas for comments.

This module defines Pydantic models for comment request/response
validation in the API layer.
"""

from datetime import datetime
from uuid import UUID

from pydantic import BaseModel, Field


class CommentCreateSchema(BaseModel):
    """Schema for creating a comment.

    Attributes:
        content: Comment text content (Markdown supported).
        parent_id: Optional parent comment ID for replies.
    """

    content: str = Field(..., min_length=1, max_length=5000, description="Comment content")
    parent_id: UUID | None = Field(default=None, description="Parent comment ID for replies")


class CommentResponseSchema(BaseModel):
    """Schema for comment response.

    Attributes:
        id: Unique comment identifier.
        post_id: UUID of the parent post.
        author_id: Comment author identifier.
        content: Comment content text.
        parent_id: Optional parent comment ID.
        like_count: Number of likes on this comment.
        created_at: Creation timestamp.
        updated_at: Last update timestamp.
    """

    id: UUID
    post_id: UUID
    author_id: str
    content: str
    parent_id: UUID | None = None
    like_count: int = 0
    created_at: datetime | None = None
    updated_at: datetime | None = None


class CommentLikeResponseSchema(BaseModel):
    """Schema for comment like response.

    Attributes:
        id: Comment identifier.
        like_count: Updated like count.
    """

    id: UUID
    like_count: int