backend/config.py

"""Path detection — HF Spaces /data bucket vs local ./local_data clone.

Environment variables (defaults match the REAL published repo):
    ELYSIUM_MODEL_REPO   default: build-small-hackathon/elysium-MiniCPM-V-4.6-F16-GGUF
    ELYSIUM_GGUF_FILE    default: elysium-f16.gguf
    ELYSIUM_MMPROJ_FILE  default: ""   (no mmproj file is published yet — vision auto-disables)
    HF_TOKEN             optional read token for private/gated repos
    ELYSIUM_OFFLINE      "1" to force offline mode
"""
import os
from pathlib import Path


def _detect() -> Path:
    p = Path("/data")
    if p.exists() and os.access(p, os.W_OK):
        return p
    local = Path(__file__).resolve().parent.parent / "local_data"
    local.mkdir(exist_ok=True)
    return local


DATA_PATH       = _detect()
HYPERGRAPH_DB   = DATA_PATH / "hypergraph" / "civilization.db"
FOSSILS_DIR     = DATA_PATH / "fossils"
AUDIO_CACHE     = DATA_PATH / "audio_cache"
NODE_POSITIONS  = DATA_PATH / "node_positions"
REMINDERS_DB    = DATA_PATH / "reminders.db"
CALENDAR_ICS    = DATA_PATH / "calendar.ics"
OUTBOX          = DATA_PATH / "outbox"
UPLOADS_DIR     = DATA_PATH / "uploads"

for d in (HYPERGRAPH_DB.parent, FOSSILS_DIR, AUDIO_CACHE, NODE_POSITIONS, OUTBOX, UPLOADS_DIR):
    d.mkdir(parents=True, exist_ok=True)

# ─── Model configuration (REAL published repo) ──────────────────────────────
MODEL_REPO   = os.environ.get("ELYSIUM_MODEL_REPO",   "build-small-hackathon/elysium-MiniCPM-V-4.6-F16-GGUF")
GGUF_FILE    = os.environ.get("ELYSIUM_GGUF_FILE",    "elysium-f16.gguf")
MMPROJ_FILE  = os.environ.get("ELYSIUM_MMPROJ_FILE",  "")   # empty → no vision

HF_TOKEN     = os.environ.get("HF_TOKEN") or os.environ.get("HUGGING_FACE_HUB_TOKEN") or None
OFFLINE_MODE = os.environ.get("ELYSIUM_OFFLINE", "0") == "1"

# ─── Upload limits ──────────────────────────────────────────────────────────
MAX_UPLOAD_FILES   = 2
MAX_UPLOAD_BYTES   = 12 * 1024 * 1024  # 12 MB per file
ALLOWED_MIME_TYPES = {
    "image/png", "image/jpeg", "image/webp", "image/gif",
    "application/pdf",
}