"""Вложения проектных карточек.

По решению: файлы хранятся в MinIO (креды в env), в БД — метаданные и ключ
объекта. Тип определяется автоматически по MIME и расширению.
"""
from __future__ import annotations

import json
import time

from ..db import store

KIND_BY_EXT = {
    "image": {"png", "jpg", "jpeg", "gif", "webp", "svg", "bmp", "avif", "heic"},
    "video": {"mp4", "mov", "avi", "mkv", "webm", "m4v"},
    "audio": {"mp3", "wav", "ogg", "m4a", "flac", "aac"},
    "archive": {"zip", "rar", "7z", "tar", "gz", "bz2"},
    "document": {"pdf", "doc", "docx", "xls", "xlsx", "csv", "txt", "md", "rtf", "ppt", "pptx", "odt", "ods"},
}

KIND_LABELS = {
    "image": "Изображение",
    "video": "Видео",
    "audio": "Аудио",
    "archive": "Архив",
    "document": "Документ",
    "other": "Файл",
}


def detect(name: str, mime: str = "") -> dict:
    ext = (name.split(".")[-1] if "." in name else "").lower()
    kind = "other"
    if mime.startswith("image/"):
        kind = "image"
    elif mime.startswith("video/"):
        kind = "video"
    elif mime.startswith("audio/"):
        kind = "audio"
    else:
        for k, exts in KIND_BY_EXT.items():
            if ext in exts:
                kind = k
                break
    return {"kind": kind, "label": KIND_LABELS[kind]}


def _files_of(card_id: str) -> list[dict]:
    from .projects import patch_card

    row = store.query_one("SELECT files FROM projects WHERE id = ?", [card_id])
    if not row:
        raise KeyError(card_id)
    return json.loads(row["files"] or "[]")


def add_file(card_id: str, name: str, data: bytes, mime: str = "") -> dict:
    """Сохраняет тело в MinIO и метаданные в карточку."""
    from . import object_store
    from .projects import patch_card

    files = _files_of(card_id)
    info = detect(name, mime)
    object_key = object_store.put(card_id, name, data, mime)
    entry = {
        "id": store.uid("pf_"),
        "name": name,
        "size": len(data),
        "kind": info["kind"],
        "label": info["label"],
        "objectKey": object_key,
    }
    files.append(entry)
    patch_card(card_id, {"files": files})
    return entry


def get_file_entry(card_id: str, file_id: str) -> tuple[dict, list[dict]]:
    files = _files_of(card_id)
    entry = next((f for f in files if f["id"] == file_id), None)
    if not entry:
        raise KeyError(file_id)
    return entry, files


def remove_file(card_id: str, file_id: str) -> None:
    from . import object_store
    from .projects import patch_card

    files = _files_of(card_id)
    entry = next((f for f in files if f["id"] == file_id), None)
    if entry and entry.get("objectKey"):
        object_store.remove(entry["objectKey"])
    patch_card(card_id, {"files": [f for f in files if f["id"] != file_id]})


def object_storage_available() -> bool:
    from . import object_store

    return object_store.configured()