from __future__ import annotations

import uuid
from pathlib import Path

from app.config import get_settings
from app.vision.preprocess import PreparedImage


def save_upload(prepared: PreparedImage, *, user_id: int) -> str:
    settings = get_settings()
    user_dir = Path(settings.uploads_dir) / str(user_id)
    user_dir.mkdir(parents=True, exist_ok=True)
    name = f"{uuid.uuid4().hex}.jpg"
    path = user_dir / name
    path.write_bytes(prepared.jpeg_bytes)
    return name


def upload_media_path(user_id: int, filename: str) -> str:
    return f"/api/v1/media/uploads/{user_id}/{filename}"


def format_upload_images_markdown(user_id: int, filenames: list[str]) -> str:
    if not filenames:
        return ""
    total = len(filenames)
    lines: list[str] = []
    for index, name in enumerate(filenames, start=1):
        alt = f"скриншот {index}/{total}" if total > 1 else "скриншот"
        lines.append(f"![{alt}]({upload_media_path(user_id, name)})")
    return "\n".join(lines)