import requests
from misskey.exceptions import MisskeyAPIException
from client import client_connection
from db_utils import get_db_connection

def add_character(name: str, rarity: int, weight: float, image_url: str) -> tuple[int, str]:
    """
    Adds a character to the database, uploading the image from a public URL to the bot's Misskey Drive.

    Args:
        name (str): Character name.
        rarity (int): Character rarity (e.g., 1-5).
        weight (float): Pull weight (e.g., 0.02).
        image_url (str): Public URL of the image from the post (e.g., from note['files'][i]['url']).

    Returns:
        tuple[int, str]: Character ID and bot's Drive file_id.

    Raises:
        ValueError: If inputs are invalid.
        RuntimeError: If image download/upload or database operation fails.
    """
    try:
        # Validate inputs
        if not name or not name.strip():
            raise ValueError("Character name cannot be empty.")
        if not isinstance(rarity, int) or rarity < 1:
            raise ValueError("Rarity must be a positive integer.")
        if not isinstance(weight, (int, float)) or weight <= 0:
            raise ValueError("Weight must be a positive number.")
        if not image_url:
            raise ValueError("Image URL must be provided.")

        # Download image
        response = requests.get(image_url, stream=True)
        if response.status_code != 200:
            raise RuntimeError(f"Failed to download image from {image_url}")

        # Upload to bot's Drive
        mk = client_connection()
        try:
            media = mk.drive_files_create(response.raw)
            file_id = media["id"]
        except MisskeyAPIException as e:
            raise RuntimeError(f"Failed to upload image to bot's Drive: {e}") from e

        # Insert into database
        conn = get_db_connection()
        cur = conn.cursor()
        cur.execute(
            'INSERT INTO characters (name, rarity, weight, file_id) VALUES (?, ?, ?, ?)',
            (name.strip(), rarity, float(weight), file_id)
        )
        conn.commit()
        character_id = cur.lastrowid

        return character_id, file_id

    except Exception as e:
        raise
    finally:
        if 'conn' in locals():
            conn.close()