"""
PVD System — Entry Point
Location: pvs_backend/app.py
Starts FastAPI from pvs_backend/backend/app/main.py
"""

import sys
import os

# ── Base directory (pvs_backend/) ────────────────────────────
BASE_DIR = os.path.dirname(os.path.abspath(__file__))

# ── Add all required paths ────────────────────────────────────
sys.path.insert(0, BASE_DIR)
sys.path.insert(0, os.path.join(BASE_DIR, "src"))
sys.path.insert(0, os.path.join(BASE_DIR, "backend"))

# ── Fix paths for HuggingFace environment ────────────────────
os.environ.setdefault("PROJECT_ROOT", BASE_DIR)
os.environ.setdefault("CONFIGS_DIR", os.path.join(BASE_DIR, "configs"))
os.environ.setdefault("ARTIFACTS_DIR", os.path.join(BASE_DIR, "artifacts"))
os.environ.setdefault("API_PORT", "7860")
os.environ.setdefault("RELOAD", "false")

# ── Start FastAPI server ──────────────────────────────────────
if __name__ == "__main__":
    import uvicorn

    # Change to backend/ so app.main:app resolves correctly
    os.chdir(os.path.join(BASE_DIR, "backend"))

    uvicorn.run(
        "app.main:app",
        host="0.0.0.0",
        port=int(os.environ.get("API_PORT", 7860)),
        workers=1,
        reload=False,
    )