"""Org-scoped filesystem paths."""

import json
import os
from datetime import datetime
from pathlib import Path

DATA_ROOT = Path("data")
UPLOAD_ROOT = Path("uploads")
PROCESSED_ROOT = Path("processed")
RAG_CACHE_DIRNAME = "lightrag_caches"
QMD_COLLECTIONS_DIRNAME = "qmd_collections"
MEETINGS_DIRNAME = "meetings"
DOCUMENTS_DIRNAME = "documents"


def org_upload_dir(org_slug: str, user_id: int) -> Path:
    path = UPLOAD_ROOT / org_slug / str(user_id)
    path.mkdir(parents=True, exist_ok=True)
    return path


def org_meetings_dir(org_slug: str) -> Path:
    path = PROCESSED_ROOT / org_slug / MEETINGS_DIRNAME
    path.mkdir(parents=True, exist_ok=True)
    return path


def org_rag_index_dir(org_slug: str) -> Path:
    """Legacy: путь к lightrag_caches/<org>/ (deprecated, kept for migration)."""
    path = PROCESSED_ROOT / org_slug / RAG_CACHE_DIRNAME
    path.mkdir(parents=True, exist_ok=True)
    return path


def org_qmd_root(org_slug: str) -> Path:
    """Корень qmd-коллекций организации: ``processed/<org>/qmd_collections/``."""
    env_root = os.environ.get("QMD_COLLECTION_ROOT")
    base = Path(env_root) if env_root else PROCESSED_ROOT
    path = base / org_slug / QMD_COLLECTIONS_DIRNAME
    path.mkdir(parents=True, exist_ok=True)
    return path


def org_documents_dir(org_slug: str) -> Path:
    path = PROCESSED_ROOT / org_slug / DOCUMENTS_DIRNAME
    path.mkdir(parents=True, exist_ok=True)
    return path


def resolve_document_path(org_slug: str, rel_path: str) -> Path:
    base = org_documents_dir(org_slug).resolve()
    full = (base / rel_path).resolve()
    if not str(full).startswith(str(base)):
        raise ValueError("Invalid path")
    return full


def resolve_meeting_path(org_slug: str, rel_path: str) -> Path:
    """Resolve relative path under org meetings dir; reject traversal."""
    base = org_meetings_dir(org_slug).resolve()
    full = (base / rel_path).resolve()
    if not str(full).startswith(str(base)):
        raise ValueError("Invalid path")
    return full


def write_folder_project_meta(folder_path: Path, project_slug: str) -> None:
    meta = {
        "project_slug": project_slug.strip().lower(),
        "created_at": datetime.now().isoformat(),
    }
    (folder_path / ".project.json").write_text(
        json.dumps(meta, ensure_ascii=False),
        encoding="utf-8",
    )