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

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.
    """
    # 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, timeout=30)
    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
    character_id = insert_character(name.strip(), rarity, float(weight), file_id)
    return character_id, file_id