from typing import AsyncIterator, ClassVar, List, Optional

from pydantic import BaseModel


class Person(BaseModel):
    KEYS: ClassVar[List[str]] = ["id", "name"]

    id: int = -1
    name: str


async def create(conn):
    await conn.execute(
        """
        CREATE TABLE IF NOT EXISTS Person (
            id INTEGER PRIMARY KEY,
            name TEXT UNIQUE
        );"""
    )


async def search_by_name(conn, name: str) -> AsyncIterator[Person]:
    async with conn.execute(
        """
        SELECT id, name
        FROM Person
        WHERE name LIKE ?
    """,
        (f"%{name}%",),
    ) as cursor:
        async for row in cursor:
            yield Person(id=row[0], name=row[1])


async def get_by_name(conn, name: str) -> Optional[Person]:
    cursor = await conn.execute(
        """
        SELECT id, name
        FROM Person
        WHERE name = ?
    """,
        (name,),
    )
    row = await cursor.fetchone()
    if not row:
        return None
    return Person(id=row[0], name=row[1])


async def get_by_id(conn, id: int) -> Optional[Person]:
    cursor = await conn.execute(
        """
        SELECT id, name
        FROM Person
        WHERE id = ?
    """,
        (id,),
    )
    row = await cursor.fetchone()
    if not row:
        return None
    return Person(id=row[0], name=row[1])


async def get_all(conn) -> AsyncIterator[Person]:
    async with conn.execute(
        """
        SELECT id, name
        FROM Person
    """
    ) as cursor:
        async for row in cursor:
            yield Person(id=row[0], name=row[1])


async def insert_person(conn, person: Person) -> Person:
    cursor = await conn.execute(
        """
        INSERT INTO Person (name)
        VALUES (?)
    """,
        (person.name,),
    )
    person.id = cursor.lastrowid
    return person