from datetime import datetime, timezone
from uuid import uuid4

from backend.app.core.security import clean_url
from backend.app.database import get_connection


def create_link(user_id: str, title: str, url: str, comment: str, timestamp: str | None):
    cleaned_url = clean_url(url)
    created_at = datetime.now(timezone.utc).isoformat()
    record = {
        'id': str(uuid4()),
        'user_id': user_id,
        'title': title,
        'url': cleaned_url,
        'comment': comment,
        'timestamp': timestamp or created_at,
        'created_at': created_at,
        'updated_at': created_at,
        'is_public': 1,
    }
    with get_connection() as conn:
        conn.execute(
            '''
            INSERT INTO links (id, user_id, title, url, comment, timestamp, created_at, updated_at, is_public)
            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
            ''',
            (
                record['id'],
                record['user_id'],
                record['title'],
                record['url'],
                record['comment'],
                record['timestamp'],
                record['created_at'],
                record['updated_at'],
                record['is_public'],
            ),
        )
        conn.commit()
    return record


def list_public_links(username: str | None = None):
    with get_connection() as conn:
        rows = conn.execute(
            '''
            SELECT links.*, users.username, users.avatar_url, users.bio
            FROM links
            JOIN users ON users.id = links.user_id
            WHERE links.is_public = 1
              AND (? IS NULL OR users.username = ?)
            ORDER BY created_at DESC
            ''',
            (username, username),
        ).fetchall()
    return [dict(row) for row in rows]